SUMMARY CHARACTERISTICS OF THE W SATELLITES
SUMMARY CHARACTERISTICS OF THE W SATELLITES
SUMMARY CHARACTERISTICS OF THE W SATELLITES
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<strong>SUMMARY</strong> <strong>CHARACTERISTICS</strong> <strong>OF</strong><br />
<strong>THE</strong> W <strong>SATELLITES</strong><br />
This document contains information on the mission, communications features, coverages, frequency plans and<br />
implementation of the W satellites.
TABLE <strong>OF</strong> CONTENTS<br />
<strong>THE</strong> W <strong>SATELLITES</strong><br />
The W Satellites<br />
<strong>THE</strong> W <strong>SATELLITES</strong> ..........................................................................................................................................................4<br />
INTRODUCTION.....................................................................................................................................................................4<br />
COMMUNICATIONS FEATURES...........................................................................................................................................5<br />
W1 .....................................................................................................................................................................................5<br />
W2 .....................................................................................................................................................................................7<br />
W3 .....................................................................................................................................................................................7<br />
W3A...................................................................................................................................................................................7<br />
W4 .....................................................................................................................................................................................9<br />
W5 .....................................................................................................................................................................................9<br />
BEACONS.............................................................................................................................................................................11<br />
SATELLITE IMPLEMENTATION..........................................................................................................................................12<br />
TABLE <strong>OF</strong> FIGURES<br />
FIGURE 1. EUTELSAT W1 FREQUENCY PLAN (FREQUENCIES IN MHZ)......................................................................15<br />
FIGURE 2 . ILLUSTRATION <strong>OF</strong> W1 RECEIVE COVERAGE (10° EAST )...............................................................................16<br />
FIGURE 3. ILLUSTRATION <strong>OF</strong> W1 TRANSMIT COVERAGE (10° EAST ).............................................................................17<br />
FIGURE 4 . ILLUSTRATION <strong>OF</strong> W1 RECEIVE STEERABLE COVERAGE (10° EAST )..........................................................18<br />
FIGURE 5 . ILLUSTRATION <strong>OF</strong> W1 TRANSMIT STEERABLE COVERAGE (10° EAST ).......................................................19<br />
FIGURE 6 . EUTELSAT W2 FREQUENCY PLAN (FREQUENCIES IN MHZ).....................................................................20<br />
FIGURE 7 . ILLUSTRATION <strong>OF</strong> W2 RECEIVE COVERAGE (16° EAST )...............................................................................21<br />
FIGURE 8 . ILLUSTRATION <strong>OF</strong> W2 TRANSMIT COVERAGE (16° EAST )............................................................................22<br />
FIGURE 9 . ILLUSTRATION <strong>OF</strong> W2 STEERABLE SPOT RECEIVE COVERAGE (16° EAST )................................................23<br />
FIGURE 10 . ILLUSTRATION <strong>OF</strong> W2 STEERABLE SPOT TRANSMIT COVERAGE (16° EAST ) ..........................................24<br />
FIGURE 11 . EUTELSAT W3 FREQUENCY PLAN (FREQUENCIES IN MHZ)...................................................................25<br />
FIGURE 12 . ILLUSTRATION <strong>OF</strong> W3 RECEIVE COVERAGE (7° EAST ) ...............................................................................26<br />
FIGURE 13 . ILLUSTRATION <strong>OF</strong> W3 TRANSMIT COVERAGE (7° EAST )............................................................................27<br />
FIGURE 14 . ILLUSTRATION <strong>OF</strong> W3 STEERABLE SPOT RECEIVE COVERAGE (7° EAST )................................................28<br />
FIGURE 15. ILLUSTRATION <strong>OF</strong> W3 STEERABLE SPOT TRANSMIT COVERAGE (7° EAST )..............................................29<br />
FIGURE 16. EUTELSAT W3A FREQUENCY PLAN (FREQUENCIES IN MHZ) ................................................................30<br />
FIGURE 17. <strong>THE</strong> EXPECTED UPLINK EUROPEAN A SERVICE AREA <strong>OF</strong> W3A AT 7° EAST (EQUIVALENT TO <strong>THE</strong> W3<br />
UPLINK PERFORMANCE)...............................................................................................................................................31<br />
FIGURE 18. <strong>THE</strong> EXPECTED DOWNLINK EUROPEAN A SERVICE AREA <strong>OF</strong> W3A AT 7° EAST (EQUIVALENT TO <strong>THE</strong><br />
W3 DOWNLINK PERFORMANCE).................................................................................................................................32<br />
FIGURE 19. <strong>THE</strong> EXPECTED EUROPEAN B SERVICE AREA <strong>OF</strong> W3A AT 7° EAST ............................................................33<br />
FIGURE 20 <strong>THE</strong> EXPECTED EUROPEAN C SERVICE AREA ON <strong>THE</strong> UPLINK <strong>OF</strong> CHANNELS A <strong>OF</strong> W3A AT 7° EAST ...34<br />
FIGURE 21. <strong>THE</strong> EXPECTED EUROPEAN C SERVICE AREA ON <strong>THE</strong> DOWNLINK <strong>OF</strong> CHANNELS J <strong>OF</strong> W3A AT 7° EAST .<br />
.........................................................................................................................................................................................35<br />
FIGURE 22. <strong>THE</strong> EXPECTED EUROPEAN C SERVICE AREA ON <strong>THE</strong> UPLINK <strong>OF</strong> CHANNELS H <strong>OF</strong> W3A AT 7° EAST .36<br />
FIGURE 23. <strong>THE</strong> EXPECTED AFRICAN SERVICE AREA <strong>OF</strong> W3A AT 7° EAST . .................................................................37<br />
FIGURE 24 . EUTELSAT W4 FREQUENCY PLAN – “RUSSIAN” CHANNELS (FREQUENCIES IN MHZ)......................38<br />
FIGURE 25 . EUTELSAT W4 FREQUENCY PLAN – “AFRICAN/STEERABLE” CHANNELS (FREQUENCIES IN MHZ)39<br />
FIGURE 26 . ILLUSTRATION <strong>OF</strong> W4 RUSSIAN RECEIVE COVERAGE (36° EAST )............................................................40<br />
FIGURE 27 . ILLUSTRATION <strong>OF</strong> W4 RUSSIAN TRANSMIT COVERAGE (36° EAST ).........................................................41<br />
FIGURE 28 . ILLUSTRATION <strong>OF</strong> W4 AFRICAN RECEIVE COVERAGE (36° EAST )............................................................42<br />
FIGURE 29 . ILLUSTRATION <strong>OF</strong> W4 AFRICAN TRANSMIT COVERAGE, CHANNELS 30 TO 36 (36° EAST )..................43<br />
FIGURE 30 . ILLUSTRATION <strong>OF</strong> W4 AFRICAN TRANSMIT COVERAGE, CHANNELS 38 AND 40 (36° EAST ) ...............44<br />
FIGURE 31 . ILLUSTRATION <strong>OF</strong> W4 TRANSMIT STEERABLE COVERAGE (36° EAST )....................................................45<br />
FIGURE 32 . EUTELSAT W5 FREQUENCY PLAN (FREQUENCIES IN MHZ)...................................................................46<br />
FIGURE 33. ILLUSTRATION <strong>OF</strong> W5 RECEIVE COVERAGE (70.5 E)...................................................................................47
The W Satellites<br />
FIGURE 34. ILLUSTRATION <strong>OF</strong> W5 TRANSMIT COVERAGE (70.5 E)................................................................................48<br />
FIGURE 35. EXAMPLES <strong>OF</strong> W5 STEERABLE RECEIVE COVERAGE (-4, -2, 0, +2, +4, +6, +8 & +9 DB/K) (70.5°<br />
EAST )..............................................................................................................................................................................49<br />
FIGURE 36. EXAMPLES <strong>OF</strong> W5 STEERABLE TRANSMIT COVERAGE, (40, 42, 44, 46, 48, 50, 52 & 53 DBW) (70.5°<br />
EAST )..............................................................................................................................................................................50<br />
FIGURE 37 . W1 IN-ORBIT.....................................................................................................................................................51<br />
FIGURE 38 . W2 STOWED FOR LAUNCH...............................................................................................................................52<br />
FIGURE 39 . W4 STOWED FOR LAUNCH ..............................................................................................................................53<br />
w_(iss6.3_jan03).doc - 3 -
Introduction<br />
The W Satellites<br />
w_(iss6.3_jan03).doc - 4 -<br />
The W Satellites<br />
The W satellites are designed to provide telecommunications services primarily over Europe (W1, W2, W3,<br />
W3A and W5). and communication services over Russia and Africa (W4).<br />
W1 is designed to provide 28 channels at saturation, W2, W3 and W5 are designed to offer 24 transponders at<br />
saturation and W4 is designed to provide 31 transponders at saturation. W3A is designed to be able to offer<br />
additional capacity at 7º East as well as to back up W3. The W satellites have a minimum operational lifetime of<br />
12 years. The launch dates for the W satellites are as follows:<br />
Satellite Launch Date<br />
W1 September 2000<br />
W2 October 1998<br />
W3 April 1999<br />
W3A Second Half 2003<br />
W4 May 2000<br />
W5 November 2002<br />
The main characteristics of the five satellites are given below.<br />
The W satellites are used principally for telecommunications services, mainly business services, satellite news<br />
gathering, television and radio programme exchanges, etc…. The W satellites are also used to complement<br />
Eutelsat’s offer for TV broadcast distribution services. W1 is deployed at the 10° East orbital position and W2<br />
and W3 are located at 16° and 7° degrees East orbital positions, respectively. W3A is collocated with W3. They<br />
started to replace the EUTELSAT II series at those positions in 1998. W4 is designed to provide mainly<br />
broadcast services and is located at 36º East.
Communications Features<br />
W1<br />
w_(iss6.3_jan03).doc - 5 -<br />
The W Satellites<br />
W1 is designed to provide 28 operational transponders at saturation for a minimum satellite lifetime of 12 years<br />
in geostationary orbit.<br />
The frequency plan is shown in Figure 1. It comprises six “B” channels, eight “D” channels, eight “DS”<br />
channels and six “F” channels.<br />
The frequency bands utilized by each of the channel groups are as follows:<br />
Channel Group Uplink Band Downlink Band<br />
B 14.25 - 14.50 GHz 10.95 - 11.20 GHz<br />
D, DS 13.75 - 14.00 GHz 11.45 - 11.70 GHz<br />
F 14.00 - 14.25 GHz 12.50 - 12.75 GHz<br />
The usable bandwidth of each communications channel is as follows:<br />
- 72 MHz for the B and F channels<br />
- 62 MHz for Channels D3, D4, D3S and D4S<br />
- 54 MHz for Channels D5 to D8 and D5S to D8S<br />
- 40 MHz for Channels D1, D2, D1S and D2S<br />
There are ten channel frequencies on both the uplink and the downlink, each of which is re-used within the fixed<br />
coverage by means of linear orthogonal polarization. Thus there are twenty channels connected to the fixed<br />
coverage on both the uplink and the downlink (the B, D and F channels). Figures 2 and 3 show the fixed receive<br />
and transmit coverages, respectively, from 10º East<br />
Additionally, eight channels (four channel frequencies) are re-used by employing spatial isolation between the<br />
steerable coverage and the fixed coverage. Thus there are eight channels (the DS channels) connected to the<br />
steerable coverage on both the uplink and the downlink.<br />
The centre of the steerable beam can be moved to any point on the visible earth. Also, the orientation of the<br />
elliptical beam can be rotated by up to ± 90º. Figure 4 and 5 show the actual receive and transmit coverage,<br />
respectively, of the W1 single steerable beam.<br />
Flexible cross-connection between the fixed and steerable coverages is provided for Channels D1, D3, D5, D7<br />
and D1S, D3S, D5S, D7S as follows:
w_(iss6.3_jan03).doc - 6 -<br />
The W Satellites<br />
• Channels D1, D3, D1S and D3S can each receive from either the fixed coverage or the steerable coverage,<br />
the choice of uplink coverage being made on a channel-by-channel basis.<br />
• Channels D5, D7, D5S and D7S can each receive from either the fixed coverage or the steerable coverage,<br />
or simultaneously from both coverages, the choice of operational mode being made on a channel-by-<br />
channel basis.<br />
The eight channels with cross-connection capability are identified in Figure 1. The following operational<br />
possibilities are provided for all eight channels:<br />
• A signal received from one coverage (fixed or steerable) can be transmitted to the other coverage. For<br />
example, the channel pair D3 and D3S could be used to provide bi-directional communication between the<br />
fixed coverage and the steerable coverage.<br />
• A signal received from any given coverage can be simultaneously transmitted to both coverages. For<br />
example, the channel pair D1 and D1S could be used to “broadcast” the same signal received from the<br />
steerable coverage to both the fixed and steerable coverages.<br />
In addition, Channels D5, D7, D5S and D7S each provide the possibility to receive signals from both coverages<br />
and to transmit them to a single coverage or to both coverages. In this case, performance in terms of G/T takes<br />
into account the wider uplink coverage and discrimination between uplink carriers must be ensured through<br />
FDMA (i.e. the spectra of the carriers must not overlap).<br />
For example, the lower half of the 54 MHz bandwidth occupied by the channel pair D5/D5S could be used to<br />
receive traffic from the fixed coverage whilst the upper half could be used to receive traffic from the steerable<br />
coverage. The combined traffic could then be transmitted to the fixed coverage via Channel D5 and<br />
simultaneously to the steerable coverage via Channel D5S. This type of networking between two different<br />
coverages can offer attractive mission features for certain types of services.
W2<br />
w_(iss6.3_jan03).doc - 7 -<br />
The W Satellites<br />
W2 is designed to provide 24 transponders at saturation with a minimum satellite lifetime of 12 years from<br />
geostationary orbit. As shown in the frequency plan in Figure 6, W2 transponders have 36 MHz and 72 MHz<br />
usable bandwidth.<br />
Each uplink frequency is uniquely related to a downlink frequency. Of the 17 frequencies in each polarization,<br />
any 12 may be selected in orbit for operation on a channel-by-channel basis, independently for each<br />
polarization.<br />
Figures 7 and 8 show these receive and transmit coverages respectively, from 16° East.<br />
In addition to the fixed beams, W2 has a single steerable beam of the same type as that of W1. A set of 10<br />
channels (designated in Figure 6) is switchable between the fixed beam and the steerable beam on a channel-by-<br />
channel basis. Figure 9 and 10 show the actual receive and transmit coverage, respectively, of the W2 steerable<br />
beam.<br />
W3<br />
W3 has the same capacity and lifetime and the same frequency plan as W2, except that the polarization of the C<br />
and D channels is inverted as shown in Figure 11. The uplink to downlink connectivity and the channel<br />
selectivity are identical to that of W2.<br />
Figures 12 and 13 show the receive and transmit coverages respectively, from 7° East.<br />
As for W2, W3 has the same steerable beam with the same 10 channel connectivity and selectivity (except for<br />
the polarization reversal mentioned above). Figures 14 and 15 show the actual receive and transmit coverage,<br />
respectively, of the W3 steerable beam.<br />
W3A<br />
The W3A satellite is designed to be able to offer additional capacity at 7º East as well as to back up W3. The<br />
W3A satellite is designed to operate 40 transponders at saturation for a minimum lifetime of 12.25 years.<br />
However, as can be seen from Figure 16, the frequency plan supports 58 channels. The maximum number of<br />
transponders that can be operated will be a trade-off of the thermal and DC power considerations together with<br />
the levels of back off.
The satellite will support four different service areas:<br />
w_(iss6.3_jan03).doc - 8 -<br />
The W Satellites<br />
• European Service Area A which is used for both uplink and downlink. Typical expected coverage<br />
performances for the uplink and downlink are shown in Figures 17 and 18,<br />
• European Service Area B which is only used for the downlink. A typical expected coverage performance is<br />
shown in Figure 19,<br />
• European Service Area C which is used for uplink at 18 GHz and for both uplink and downlink at Ka-band.<br />
Typical expected coverage performances for the three bands are shown in Figures 20, 21 and 22 and,<br />
• African Service Area which is used for both uplink and downlink. Typical expected coverage performance<br />
is shown in Figure 23.<br />
The frequency plan shows channels with a usable bandwidth of 36 MHz, 54 MHz, 72 MHz and 108 MHz.<br />
The channels are organised in eight groups, designated A, B, C, D, F, G, H and J, as shown in Figure 16. The<br />
bands covered by these channel groups are given below.<br />
The channels have the following connectivity:<br />
• Channels in Group A are connected to the European Service Area C on uplink and European Service Area<br />
B on downlink.<br />
• Channels in Groups B, C and F are connected to the European Service Area A on both uplink and<br />
downlink.<br />
• Channels in Group D are connected to the European Service Area A on the uplink and on the downlink, to<br />
either the European Service Area A or the European Service Area B on a channel-by-channel basis.<br />
• Channels in Group G are connected to the African Service Area on both uplink and downlink.<br />
• Channels in Group H are connected to the European Service Area C on the uplink and to the African<br />
Service Area on the downlink.<br />
• Channels in Group J are connected to the African Service Area on the uplink and to the European Service<br />
Area C on the downlink.<br />
The W3A satellite will embark four active Skyplex units identical to three embarked on HOT BIRD 6, thus<br />
including Turbo decoding and catering for 18 carriers at 2 Mbit/s for each unit. These units can be used in<br />
conjunction with channels, A9, A10, A11, A12 and, B5 or G3. It should be noted that B5 and G3 are 72 MHz<br />
channels and therefore can cater for two Skyplex multiplexes each.
W4<br />
w_(iss6.3_jan03).doc - 9 -<br />
The W Satellites<br />
W4 is designed to provide 31 transponders for a minimum satellite lifetime of 12 years in geostationary orbit.<br />
The channel centre frequencies and the channel spacing are consistent with the Broadcasting Satellite Service<br />
(BSS) Plan. All channels have a usable bandwidth of 33 MHz.<br />
The frequency plans in Figures 24 and 25 show the uplink and downlink frequencies for the 19 channels<br />
connected to the Russian coverage and the 12 channels connected to the African/Steerable coverages<br />
respectively.<br />
All 31 channels can be simultaneously operated at full power over the 12 year lifetime.<br />
W4 provides three coverages as follows:<br />
• a transmit/receive, fixed coverage of Western Russia and territories to the West of Russia (the “Russian”<br />
coverage) operating in circular polarisation;<br />
• a transmit/receive, fixed coverage of Africa (the “African” coverage) operating in linear polarisation;<br />
• a transmit/receive, steerable elliptical coverage (the “Steerable” coverage), operating in linear polarisation,<br />
and with fixed major axis orientation.<br />
As mentioned earlier, 19 channels are connected to the Russian coverage on a permanent basis. Figure 26 and<br />
27 show the receive and transmit Russian coverage, respectively<br />
The remaining 12 channels can be block-switched on the uplink to either the African coverage, shown in<br />
Figures 28, 29 and 30 or the Steerable coverage. On the downlink, six channels are permanently connected to<br />
the African coverage and the remaining six channels are permanently connected to the Steerable coverage, as<br />
indicated in Figure 25.<br />
As shown in Figure 28, the African coverage provides a small spot over Southwestern Europe/Northwestern<br />
Africa that allows for uplinking television channels received from other orbital positions and in particular from<br />
the HOT BIRD TM system, to W4 for re-broadcasting over the African coverage area. The downlink coverage of<br />
channels 30 to 36 is shown in Figure 29. Channels 38 and 40 have a higher power over the downlink African<br />
coverage, as shown in Figure 30.<br />
Figure 31 shows the actual transmit coverage of W4 steerable beam.<br />
The centre of the coverage can be moved in-orbit within regions where mutual interference with the channels<br />
operating in the Russian coverage is avoided.<br />
W5<br />
W5 is designed to provide 24 transponders for a minimum satellite lifetime of 12 years in geostationary orbit.<br />
Each transponder will have a usable bandwidth of 72 MHz.<br />
The frequency plan in Figure 32 shows the uplink frequency bands, downlink frequency bands and<br />
uplink/downlink connections. There are 12 channel frequencies on both uplink and downlink, each re-used with<br />
the aid of linear orthogonal polarization.
w_(iss6.3_jan03).doc - 10 -<br />
The W Satellites<br />
Using in-orbit switching, each uplink channel in the bands 13.75 - 14.00 GHz and 14.00 - 14.25 GHz can be<br />
independently downlinked either into the 11.45 - 11.70 GHz or the 12.50 -12.75 GHz band, except for channels<br />
F5 and D5 that only have a choice (see Figure 32).<br />
All channels are connected on the uplink and the downlink to very wide fixed coverages. Figures 33 and 34<br />
show the fixed receive and transmit coverages respectively.<br />
In addition to the fixed beams, W5 will have two steerable beams. Each steerable beam can be steered<br />
independently to any point on the visible earth (beam centre). Also, the orientation of each elliptical beam can<br />
be rotated by ± 90º. Two sets of 6 channels on the uplink and 6 channels on the downlink are switchable<br />
between the steerable beams and the fixed beam, channel-by-channel (see Figure 32). Hence, for these channels,<br />
in addition to communications within the fixed coverage, communications may be established between the fixed<br />
beam and each of the steerable coverages or within each of the steerable beams.<br />
This feature makes W5 particularly attractive for communications with a single satellite hop between the fixed<br />
coverage and the geographical regions covered by the steerable coverages. Figures 35 and 36 show examples of<br />
steerable beam pointing. With the possibility to establish communications within each of the steerable beams,<br />
W5 also offers an effective means to set up communications networks either on a national or regional level.
Beacons<br />
w_(iss6.3_jan03).doc - 11 -<br />
The W Satellites<br />
W1 carries two tracking beacons (B1 and B2). W2 carries three tracking beacons (B1 and B2 for the fixed beam,<br />
and B3 for the steerable beam). W3 carries two tracking beacons (B2 for the fixed beam and B3 for the steerable<br />
beam). W3A carries three tracking beacons in Ku-band (B1 for the Europe Service Areas A & B, B2 and B3<br />
with a global earth coverage) and one tracking beacon in Ka-band for the Europe Service Area C. W4 carries a<br />
single beacon (B1). W5 carries three tracking beacons (B1 and B2 for the fixed beam, and B3 for the steerable<br />
beam). All beacons operate in X polarization. The beacon frequencies are given in the following table:<br />
Beacon B1/(TM+RG) *<br />
(MHz)<br />
W1 W2 W3 W3A W4 W5<br />
11 450.500 or<br />
11 451.000<br />
Beacon B2 (MHz) 12 500.250 and<br />
12 749.750<br />
11 698.000 or<br />
11 699.200<br />
- 11 699.800 or<br />
11 700.400<br />
11 706.850 11 451.091 or<br />
11 452.570<br />
12 501.000 12 501.000 12 500.500 12 501.000<br />
Beacon B3 (MHz) 11 199.000 11 199.500 11 200.000 11 200.000<br />
Beacon in Ka-band (MHz) - - - 21 404.000 -<br />
* Frequency selectable by ground command.
Satellite Implementation<br />
w_(iss6.3_jan03).doc - 12 -<br />
The W Satellites<br />
The W1 satellite has been built by the former Matra Marconi Space based in France and the UK. The prime<br />
interface as well as satellite integration and test is with the former Matra Marconi Space based in Toulouse, the<br />
communications repeater is delivered by Matra Marconi Space based in the UK, while the fixed antennas are<br />
built by Matra Marconi Space based in Stevenage. The bus subsystems are furnished by Matra Marconi Space<br />
Toulouse and Stevenage.<br />
The satellite design is compatible with the Ariane 4/5 family launched from Kourou, the Atlas II series launched<br />
from Cape Canaveral and Proton launched from Baikonur.<br />
W1 is based on the three-axis stabilized EUROSTAR 2000 PLUS platform. W1 is shown in Figure 37 in its in-<br />
orbit configuration with solar panels and side mounted communications antennas deployed. These 2.5 m<br />
diameter antennas, which provide the fixed transmit and receive coverages, are of compact geometry Gregorian<br />
design with shaped main reflectors. As mentioned previously, the top-mounted transmit/receive steerable<br />
antenna may be steered anywhere over the visible earth and the elliptical footprint may be rotated by up to ±90<br />
degrees. This antenna has a shaped main reflector and a shaped sub-reflector and it is supplied by Alenia<br />
Aerospazio of Italy.<br />
The satellite is modular in concept with the service module housing the platform subsystems including the<br />
propellant and pressurant tanks, the latter located in the main load-bearing central cylinder. The North/South<br />
walls and the earth facing panels constitute the communications module and accommodate the repeater<br />
equipment.<br />
The W2, W3 and W4 satellites have been built by an international consortium led by the former Aerospatiale of<br />
France (Alcatel Space at present) as the prime contractor and includes DASA of Germany, Alenia Aerospazio of<br />
Italy and Space Systems/Loral of the United States as the main subcontractors. Alcatel Space has provided<br />
various platform subsystems as well as satellite integration and test and launch site activities. DASA has<br />
manufactured the solar array, attitude control and propulsion subsystems. Alenia Aerospazio has delivered the<br />
fixed and steerable antennas (for W2 and W3) and the RF portion of the TCR subsystem. Space Systems/Loral<br />
has provided the communications repeater. Saab Ericsson Space has provided the steerable antenna for W4.<br />
The satellite design is compatible with the Ariane 4/5 family launched from Kourou, the Atlas II series launched<br />
from Cape Canaveral and Proton launched from Baikonur.<br />
W2, W3 and W4 are based on the three axis stabilized SPACEBUS 3000 platform. W2 is shown in Figure 38 in<br />
its launch configuration with stowed solar panels, side mounted communications antennas and top mounted<br />
steerable antenna. These 1.8 m diameter antennas, one for transmit and the other for receive, are dual-gridded<br />
and shaped. The top-mounted, transmit/receive steerable antenna, may be steered , as mentioned above,<br />
anywhere over the visible earth and the elliptical footprint may be rotated ±90 degrees. These antennas have<br />
shaped main reflectors and subreflectors.
w_(iss6.3_jan03).doc - 13 -<br />
The W Satellites<br />
The satellite is modular in concept with the service module housing the platform subsystems and the central<br />
cylinder accommodating the propellant tanks. The North/South walls and the earth facing panel house the<br />
communications equipment. The attitude and orbit control subsystem provides inclined orbit, extended lifetime<br />
operation. The EUTELSAT Satellite Control Centre performs the on-station operations.<br />
The W3 satellite is outwardly similar to the W2 satellite. The W5 satellite is outwardly similar to the W2 and<br />
W3 satellites apart from having a two steerable antennas on the earth panel instead of one.<br />
The W3A satellite is built by Astrium. Astrium Toulouse are responsible for the prime contractor engineering<br />
as well as satellite integration and test. Astrium Portsmouth are responsible for the communications repeater and<br />
Astrium Stevenage for the antenna. The top floor antennas have been subcontracted to EMS, Canada.<br />
The satellite is based on a Eurostar 3000 platform with classical chemical propulsion and is designed to be<br />
compatible with Ariane, Atlas, Proton, Delta and Sea Launch. It comprises a single deck communications<br />
module for the repeater equipment and a service module housing most of the platform equipment.<br />
There are two deployable antennas of dual gridded design with 2m reflector appertures. Europe A transmit<br />
antenna is the East face deployable antenna and the Europe A receive antenna is the West face deployable<br />
antenna. The top floor carries three communications antennas on a tower - a 1m Gregorian antenna and two<br />
1.4m dual gridded reflectors. The 1m Gregorian provides the C coverage (Ku/ka). The 1.4 m dual gridded<br />
reflectors provide Europe B and African coverages as follows:<br />
a) Europe B transmit front (X) , rear Africa receive (Y)<br />
b) Europe B transmit front (Y) , rear Africa transmit (X)<br />
The satellite can operate up to 40 transponders (40 Ku or 38 Ku + 2 Ka) at saturation including 4 SKYPLEX<br />
units throughout its operational lifetime and can also operate 50 channels and 5 SKYPLEX units with back-off<br />
over the operational lifetime.<br />
Power is provided by two solar array wings, each with 5 deployable panels populated with high efficiency<br />
silicon cells and triple junction Ga As cells. In eclipse, power is provided by two Li-Ion batteries. The bus is<br />
fully regulated at 50V.<br />
The data handling and attitude determination and control functions are integrated into a common computer. The<br />
telemetry command and ranging subsystem uses S-band for transfer orbit and emergencies and Ku band for<br />
nominal on-station operations.
w_(iss6.3_jan03).doc - 14 -<br />
The W Satellites<br />
The W4 satellite is shown in Figure 39 in its launch configuration with stowed solar panels, side mounted<br />
communications antennas and top mounted steerable antenna. The circularly polarized Russian coverage<br />
antenna has a single surface shaped reflector, a single feed and polarizer. The linearly polarized African<br />
coverage antenna uses a dual gridded, shaped reflector with a dual feed. The steerable antenna is of a Gregorian<br />
design with shaped main reflector and sub-reflector.
10.95 GHz 11.20 GHz 11.45 GHz 11.70 GHz<br />
12.50 GHz 12.75 GHz<br />
10 991.670 10 991.670<br />
B1<br />
B2<br />
13.75 GHz 14.00 GHz 14.25 GHz 14.50 GHz<br />
13 773.060<br />
11 075.000 11 075.000<br />
13 839.770<br />
w_(iss6.3_jan03).doc - 15 -<br />
11 158.330 11 158.330<br />
13 906.630<br />
13 968.880<br />
D2 D4 D6 D8<br />
D1 D3 D5 D7<br />
13 773.060<br />
13 839.770<br />
13 906.630<br />
13 968.880<br />
D2S D4S D6S D8S<br />
D1S D3S D5S D7S<br />
3.3 GHz<br />
B3<br />
B4<br />
Fixed Coverage<br />
Steerable Coverage<br />
B5<br />
B6<br />
11 450.500<br />
11 451.000<br />
B1<br />
11 473.060<br />
11 473.060<br />
14 041.670 14 041.670<br />
F2<br />
F1<br />
11 539.770<br />
11 539.770<br />
14 125.000 14 125.000<br />
F4<br />
F3<br />
11 606.630<br />
11 606.630<br />
14 208.330/<br />
14 199.330<br />
14 208.330<br />
11 668.880<br />
11 668.880<br />
14 291.670 14 291.670<br />
2.3 GHz 1.5 GHz<br />
D1 D3 D5 D7<br />
D2 D4 D6 D8<br />
D1S D3S D5S D7S<br />
D2S D4S D6S D8S<br />
Figure 1. EUTELSAT W1 Frequency Plan (Frequencies in MHz)<br />
F6<br />
F5<br />
B2<br />
B1<br />
14 375.000 14 375.000<br />
B4<br />
B3<br />
12 500.250 B2a<br />
14 458.330 14 458.330<br />
B6<br />
B5<br />
12 541.670 12 541.670<br />
F1<br />
F2<br />
X<br />
Y<br />
12 625.000 12 625.000<br />
F3<br />
F4<br />
12 708.330 12 708.330<br />
Fixed or Steerable Coverage (uplink only)<br />
Fixed and/or Steerable Coverage (uplink only)<br />
F5<br />
F6<br />
12 749.750<br />
B2b<br />
X<br />
Y<br />
The W Satellites
+ 1 dB/K<br />
0 dB/K<br />
- 5 dB/K<br />
0 dB/K<br />
+ 2 dB/K<br />
0 dB/K + 1 dB/K<br />
- 3 dB/K<br />
+ 4 dB/K<br />
+ 3 dB/K<br />
- 5 dB/K<br />
Figure 2 . Illustration of W1 Receive Coverage (10° East)<br />
w_(iss6.3_jan03).doc - 16 -<br />
+ 2 dB/K<br />
W1RxFx.dsf<br />
The W Satellites
45 dBW<br />
38 dBW<br />
45 dBW<br />
48 dBW<br />
47 dBW<br />
46 dBW<br />
45 dBW<br />
43 dBW<br />
40 dBW<br />
38 dBW<br />
Figure 3. Illustration of W1 Transmit Coverage (10° East)<br />
w_(iss6.3_jan03).doc - 17 -<br />
W1Wide.dsf<br />
The W Satellites
+ 9 dB/K<br />
+ 8 dB/K<br />
+ 7 dB/K<br />
+ 6 dB/K<br />
+ 4 dB/K<br />
+ 2 dB/K<br />
0 dB/K<br />
- 2 dB/K<br />
- 4 dB/K<br />
- 6 dB/K<br />
- 8 dB/K<br />
Figure 4 . Illustration of W1 Receive Steerable Coverage (10° East)<br />
w_(iss6.3_jan03).doc - 18 -<br />
The W Satellites
52 dBW<br />
51 dBW<br />
50 dBW<br />
49 dBW<br />
48 dBW<br />
46 dBW<br />
44 dBW<br />
42 dBW<br />
40 dBW<br />
38 dBW<br />
Figure 5 . Illustration of W1 Transmit Steerable Coverage (10° East)<br />
w_(iss6.3_jan03).doc - 19 -<br />
The W Satellites
UPLINK<br />
DOWNLINK<br />
13.00 GHz<br />
13 001.00<br />
13 021.75<br />
13 042.50<br />
13 167.00<br />
w_(iss6.3_jan03).doc - 20 -<br />
13.25 GHz 13.75 GHz<br />
14.00 GHz 14.25 GHz 14.50 GHz<br />
10.95 GHz 11.20 GHz 11.45 GHz 11.70 GHz 12.50 GHz 12.75 GHz<br />
10 991.67<br />
B1 B3 B5<br />
B2 B4 B6<br />
10 991.67<br />
13 104.75<br />
13 125.50<br />
11 075.00<br />
11 075.00<br />
13 187.75<br />
13 208.50<br />
C1 C3 C5 C7 C9 C11<br />
C2 C4 C6 C8 C10 C12<br />
13 063.25<br />
13 084.00<br />
13 146.25<br />
13 229.25<br />
11 158.33<br />
11 158.33<br />
Switchable to Steerable Beam<br />
11 220.75<br />
11 241.50<br />
11 262.25<br />
11 283.00<br />
13 771.41<br />
11 303.75<br />
13 792.16<br />
11 324.50<br />
13 812.91<br />
13 854.41<br />
11 407.50<br />
13 958.33<br />
D2 D4 D6 D8 D10<br />
13 833.66<br />
13 875.16<br />
13 895.91<br />
D1 D3 D5 D7<br />
13 916.66<br />
D9 F2 F4 F6<br />
F1 F3 F5<br />
C2 C4 C6 C8 C10 C12 D2 D4 D6 D8 D10<br />
C1 C3 C5 C7 C9 C11<br />
11 345.25<br />
11 366.00<br />
11 386.75<br />
11 428.25<br />
11 449.00<br />
13 958.16<br />
14 041.67<br />
14 041.67<br />
D1 D3 D5 D7<br />
11 471.41<br />
Figure 6 . EUTELSAT W2 Frequency Plan (Frequencies in MHz)<br />
11 492.16<br />
11 512.91<br />
11 533.66<br />
11 554.41<br />
11 575.16<br />
11 595.91<br />
11 616.66<br />
14 125.00<br />
14 125.00<br />
11 658.16<br />
D9<br />
11 658.33<br />
14 208.33<br />
14 208.33<br />
14 291.67<br />
B2 B4 B6<br />
B1 B3 B5<br />
14 291.67<br />
12 541.67<br />
12 625.00<br />
12 708.33<br />
F1 F3 F5<br />
F2 F4 F6<br />
12 541.67<br />
14 375.00<br />
14 375.00<br />
12 625.00<br />
14 458.33<br />
14 458.33<br />
12 708.33<br />
Pol. X<br />
Pol. Y<br />
Pol. X<br />
Pol. Y<br />
The W Satellites
+5 dB/K<br />
+4 dB/K<br />
0 dB/K +2 dB/K<br />
-5 dB/K -3 dB/K<br />
Figure 7 . Illustration of W2 Receive Coverage (16° East)<br />
w_(iss6.3_jan03).doc - 21 -<br />
The W Satellites<br />
W2RXFX.DCr
50 dBW<br />
49 dBW<br />
47 dBW<br />
45 dBW<br />
43 dBW<br />
40 dBW<br />
Figure 8 . Illustration of W2 Transmit Coverage (16° East)<br />
w_(iss6.3_jan03).doc - 22 -<br />
The W Satellites<br />
W2WIDE.DCr
w_(iss6.3_jan03).doc - 23 -<br />
+10 dB/K<br />
+8 dB/K<br />
+6 dB/K<br />
+4 dB/K<br />
+2 dB/K<br />
0 dB/K<br />
-2 dB/K<br />
-4 dB/K<br />
Figure 9 . Illustration of W2 Steerable Spot Receive Coverage (16° East)<br />
The W Satellites<br />
W2STRRX.DCr
w_(iss6.3_jan03).doc - 24 -<br />
52 dBW<br />
51 dBW<br />
49 dBW<br />
46 dBW<br />
42 dBW<br />
40 dBW<br />
Figure 10 . Illustration of W2 Steerable Spot Transmit Coverage (16° East)<br />
The W Satellites<br />
W2STRTX.DCr
UPLINK<br />
DOWNLINK<br />
13.00 GHz<br />
13 021.75<br />
13 167.00<br />
w_(iss6.3_jan03).doc - 25 -<br />
13.25 GHz 13.75 GHz<br />
14.00 GHz 14.25 GHz 14.50 GHz<br />
D9<br />
10.95 GHz 11.20 GHz 11.45 GHz 11.70 GHz 12.50 GHz 12.75 GHz<br />
10 991.67<br />
B1 B3 B5<br />
B2 B4 B6<br />
10 991.67<br />
13 104.75<br />
11 075.00<br />
11 075.00<br />
13 187.75<br />
C2 C4 C6 C8 C10 C12<br />
C1 C3 C5 C7 C9 C11<br />
13 001.00<br />
13 042.50<br />
13 063.25<br />
13 084.00<br />
13 125.50<br />
13 146.25<br />
Switchable to Steerable Beam<br />
13 208.50<br />
11 158.33<br />
11 158.33<br />
13 229.25<br />
11 220.75<br />
11 241.50<br />
11 262.25<br />
13 771.41<br />
11 303.75<br />
13 792.16<br />
11 324.50<br />
13 854.41<br />
13 875.16<br />
11 407.50<br />
13 958.16<br />
D2 D4 D6 D8 D10<br />
13 812.91<br />
13 833.66<br />
13 895.91<br />
C1 C3 C5 C7 C9 C11<br />
13 916.66<br />
13 958.33<br />
11 512.91<br />
14 041.67<br />
F2 F4 F6<br />
F1 F3 F5<br />
14 041.67<br />
11 595.91<br />
D1 D3 D5 D7<br />
C2 C4 C6 C8 C10 C12 D2 D4 D6 D8 D10<br />
11 283.00<br />
D1 D3 D5 D7<br />
11 345.25<br />
11 366.00<br />
11 386.75<br />
11 428.25<br />
11 449.00<br />
11 471.41<br />
Figure 11 . EUTELSAT W3 Frequency Plan (Frequencies in MHz)<br />
11 492.16<br />
11 533.66<br />
11 554.41<br />
11 575.16<br />
11 616.66<br />
14 125.00<br />
14 125.00<br />
11 658.33<br />
D9<br />
11 658.16<br />
14 208.33<br />
14 208.33<br />
14 291.67<br />
B2 B4 B6<br />
B1 B3 B5<br />
14 291.67<br />
12 541.67<br />
12 625.00<br />
12 708.33<br />
F1 F3 F5<br />
F2 F4 F6<br />
12 541.67<br />
14 375.00<br />
14 375.00<br />
12 625.00<br />
14 458.33<br />
14 458.33<br />
12 708.33<br />
Pol. X<br />
Pol. Y<br />
Pol. X<br />
Pol. Y<br />
The W Satellites
+5 dB/K<br />
+4 dB/K<br />
-5 dB/K<br />
+3 dB/K<br />
-3 dB/K<br />
w_(iss6.3_jan03).doc - 26 -<br />
0 dB/K<br />
+2 dB/K<br />
Figure 12 . Illustration of W3 Receive Coverage (7° East)<br />
The W Satellites<br />
W3RxFx.DCr
45 dBW<br />
48 dBW<br />
w_(iss6.3_jan03).doc - 27 -<br />
45 dBW<br />
43 dBW<br />
40 dBW<br />
47 dBW<br />
Figure 13 . Illustration of W3 Transmit Coverage (7° East)<br />
47 dBW<br />
48 dBW<br />
47 dBW<br />
The W Satellites<br />
W3WIDE.DCr
+9 dB/K<br />
+8 dB/K<br />
+6 dB/K<br />
+4 dB/K<br />
w_(iss6.3_jan03).doc - 28 -<br />
+2 dB/K<br />
0 dB/K<br />
-2 dB/K<br />
-4 dB/K<br />
Figure 14 . Illustration of W3 Steerable Spot Receive Coverage (7° East)<br />
The W Satellites<br />
W3STRRX.DCr
53 dBW<br />
52 dBW<br />
51 dBW<br />
50 dBW<br />
w_(iss6.3_jan03).doc - 29 -<br />
49 dBW<br />
48 dBW<br />
46 dBW<br />
44 dBW<br />
42 dBW<br />
40 dBW<br />
Figure 15. Illustration of W3 Steerable Spot Transmit Coverage (7° East)<br />
The W Satellites<br />
W3STRTX.DCr
UPLINK<br />
Pol. X<br />
Pol. Y<br />
C2<br />
DOWNLINK<br />
Pol. X<br />
Pol. Y<br />
13.00 GHz 13.25 GHz 13.75 GHz<br />
14.00 GHz 14.25 GHz 14.50 GHz<br />
13 021.75<br />
13 042.50<br />
13 104.75<br />
13 167.00<br />
13 187.75<br />
C4 C6 C8 C10 C12<br />
C1 C3 C5 C7 C9 C11<br />
13 001.00<br />
10.70 GHz<br />
10 720.75<br />
A1<br />
A2<br />
10 762.25<br />
A3<br />
A4<br />
EUROPE A EUROPE A EUROPE A EUROPE A<br />
13 063.25<br />
13 084.00<br />
13 125.50<br />
13 146.25<br />
13 208.50<br />
13 229.25<br />
B1<br />
B3<br />
B2 B4<br />
D2 D4 D6 D8 D10<br />
D1 D3 D5 D7<br />
B5<br />
B6<br />
w_(iss6.3_jan03).doc - 30 -<br />
C1<br />
D9<br />
F2<br />
F4 F6<br />
F1 F3 F5<br />
D1 D3 D5 D7<br />
B2 B4<br />
B1 B3<br />
G1 G2<br />
10.95 GHz 11.20 GHz 11.45 GHz 11.70 GHz 12.50 GHz 12.75 GHz<br />
10 991.67<br />
10 991.67<br />
13 771.41<br />
11 075.00<br />
11 075.00<br />
13 792.16<br />
13 812.91<br />
13 833.66<br />
13 854.41<br />
11 158.33<br />
11 158.33<br />
13 875.16<br />
13 895.91<br />
13 916.66<br />
11 220.75<br />
13 937.41<br />
11 241.50<br />
11 262.25<br />
13 970.00<br />
11 303.75<br />
11 324.50<br />
14 041.67<br />
11 407.50<br />
14 125.00<br />
C3 C5 C7 C9 C11<br />
C2 C4 C6 C8 C10 C12<br />
11 283.00<br />
11 345.25<br />
11 366.00<br />
11 386.75<br />
11 428.25<br />
11 449.00<br />
11 471.41<br />
14 208.33<br />
11 512.91<br />
11 554.41<br />
11 595.91<br />
14 291.67<br />
11 637.41<br />
D9<br />
D2 D4 D6 D8 D10<br />
11 492.16<br />
11 533.66<br />
11 575.16<br />
11 616.66<br />
11 670.00<br />
14 375.00<br />
14 458.33<br />
B6<br />
B5<br />
12 541.67<br />
18.10 GHz 18.40 GHz<br />
1.78 GHz 2.30 GHz -7.40 GHz<br />
3.30 GHz 1.50 GHz 7.45 GHz<br />
15.00 GHz<br />
EUROPE B<br />
10 803.75<br />
A5<br />
A6<br />
10 845.25<br />
A7<br />
A8<br />
10 886.75<br />
A9<br />
SKPX<br />
A10<br />
10 928.25<br />
SKPX<br />
A11<br />
A12<br />
SKPX SKPX<br />
G1 G2<br />
SKPX SKPX<br />
SKPX<br />
G3<br />
SKPX<br />
D11<br />
13 978.91<br />
J1<br />
14 062.00<br />
J2<br />
14 187.00<br />
14 291.67<br />
11 678.91<br />
14 375.00<br />
D11<br />
SKPX SKPX<br />
G3<br />
SKPX SKPX<br />
EUROPE A EUROPE A EUROPE A/B<br />
EUROPE A<br />
AFRICA<br />
AFRICA AFRICA<br />
14 458.33<br />
12 520.75<br />
12 625.00<br />
A2<br />
A1<br />
12 708.33<br />
F1 F3 F5<br />
F2 F4 F6<br />
12 562.25<br />
12 603.75<br />
12 645.25<br />
18 170.75<br />
12 686.75<br />
18 212.25<br />
A4<br />
A3<br />
12 728.25<br />
H1 H2 H3 H4 H5 H6<br />
AFRICA<br />
Figure 16. EUTELSAT W3A Frequency Plan (Frequencies in MHz)<br />
EUROPE C<br />
18 253.75<br />
A6<br />
A5<br />
18 295.25<br />
A8<br />
A7<br />
18 336.75<br />
A10<br />
A9<br />
SKPX<br />
SKPX<br />
18 378.25<br />
SKPX<br />
A12<br />
A11<br />
SKPX<br />
The W Satellites<br />
27.50 GHz 28.60 GHz<br />
H1 H2 H3 H4 H5 H6<br />
21.40 GHz 22.00 GHz<br />
21 462.00<br />
J1<br />
27 520.75<br />
21 587.00<br />
J2<br />
27 562.25<br />
EUROPE C<br />
EUROPE C<br />
27 603.75<br />
27 645.25<br />
27 686.75<br />
SKPX: Possible use of Skyplex<br />
27 728.25<br />
W3A_Fp_06-03-01.dsf
+5 dB/K<br />
+4 dB/K<br />
-5 dB/K<br />
+3 dB/K<br />
-3 dB/K<br />
w_(iss6.3_jan03).doc - 31 -<br />
0 dB/K<br />
+2 dB/K<br />
Figure 17. The expected Uplink European A Service Area of W3A at 7° East (equivalent to the W3 uplink performance)<br />
The W Satellites<br />
W3RxFx.DCr
45 dBW<br />
48 dBW<br />
w_(iss6.3_jan03).doc - 32 -<br />
45 dBW<br />
43 dBW<br />
40 dBW<br />
47 dBW<br />
47 dBW<br />
48 dBW<br />
47 dBW<br />
Figure 18. The expected Downlink European A Service Area of W3A at 7° East (equivalent to the W3 downlink performance)<br />
The W Satellites<br />
W3WIDE.DCr
Figure 19. The expected European B Service area of W3A at 7° East.<br />
(Contours A, B, C, D, E and F correspond to 51 dBW, 50 dBW, 49 dBW, 46 dBW, 43 dBW and 41 dBW)<br />
w_(iss6.3_jan03).doc - 33 -<br />
The W Satellites
Figure 20 The expected European C Service area on the uplink of Channels A of W3A at 7° East.<br />
(Contours A, B, C, D, E and F correspond to 6 dB/K, 5 dB/K, 4 dB/K, 3 dB/K, 2 dB/K and 0 dB/K)<br />
w_(iss6.3_jan03).doc - 34 -<br />
The W Satellites
Figure 21. The expected European C Service area on the downlink of Channels J of W3A at 7° East.<br />
(Contours A, B, C, D, E, F and G correspond to 53 dBW, 52 dBW, 51 dBW, 50 dBW, 49 dBW, 48 dBW, and 46 dBW)<br />
w_(iss6.3_jan03).doc - 35 -<br />
The W Satellites
Figure 22. The expected European C Service area on the uplink of Channels H of W3A at 7° East.<br />
(Contours A, B, C, D, E, F and G correspond to 7 dB/K, 6 dB/K, 5 dB/K, 4 dB/K, 3 dB/K, 2 dB/K, and 0 dB/K)<br />
w_(iss6.3_jan03).doc - 36 -<br />
The W Satellites
Figure 23. The expected African Service Area of W3A at 7° East.<br />
(Contours A, B, C and D correspond to 45 dBW; -1 dB/K, 44 dBW; -2 dB/K, 42 dBW; -4 dB/K, 40 dBW; -6 dB/K)<br />
w_(iss6.3_jan03).doc - 37 -<br />
The W Satellites
UPLINK<br />
DOWNLINK<br />
17.3 GHz 18.1 GHz<br />
17 327.48<br />
11.7 GHz<br />
1 19 21 25 27 29 31 33 35 37 39<br />
w_(iss6.3_jan03).doc - 38 -<br />
17 672.72<br />
26 28 30 32 34 36 38 40<br />
26 28 30 32 34 36 38 40<br />
1 19 21 25 27 29 31 33 35 37 39<br />
11 727.48<br />
12 072.72<br />
Figure 24 . EUTELSAT W4 Frequency Plan – “Russian” Channels (Frequencies in MHz)<br />
17 711.08 12 111.08<br />
17 787.80<br />
12 187.80<br />
17 806.98 12 206.98<br />
17 826.16<br />
12 226.16<br />
17 845.34<br />
12 245.34<br />
17 864.52<br />
12 264.52<br />
17 883.70<br />
12 283.70<br />
17 902.88<br />
12 302.88<br />
17 922.06<br />
12 322.06<br />
17 941.24<br />
12 341.24<br />
17 960.42<br />
12 360.42<br />
17 979.60<br />
12 379.60<br />
17 998.78<br />
12 398.78<br />
18 017.96<br />
12 417.96<br />
18 037.14<br />
12 437.14<br />
18 056.32<br />
12 456.32<br />
18 075.50<br />
12 475.50<br />
RHC<br />
LHC<br />
12.5 GHz<br />
RHC<br />
LHC<br />
The W Satellites
UPLINK<br />
17.3 GHz 18.1 GHz<br />
DOWNLINK<br />
11.7 GHz<br />
2 10 20 22 24 26 30 32 34 36 38 40<br />
17 346.66<br />
11 746.66<br />
2 10 20 22 24 26 30 32 34 36 38 40<br />
w_(iss6.3_jan03).doc - 39 -<br />
17 500.10<br />
11 900.10<br />
Fixed African coverage or Steerable coverage (block-switched)<br />
Steerable coverage<br />
17 691.90<br />
12 091.90<br />
17 730.26<br />
12 130.26<br />
17 768.62<br />
12 168.62<br />
17 806.98<br />
12 206.98<br />
17 883.70<br />
12 283.70<br />
17 922.06<br />
12 322.06<br />
17 960.42<br />
12 360.42<br />
17 998.78<br />
12 398.78<br />
18 037.14<br />
12 437.14<br />
Fixed African coverage<br />
Figure 25 . EUTELSAT W4 Frequency Plan – “African/Steerable” Channels (Frequencies in MHz)<br />
18 075.50 /<br />
18 072.50<br />
12 475.50 /<br />
12 472.50<br />
The W Satellites<br />
X<br />
Y<br />
12.5 GHz<br />
X<br />
Y
+ 9 dB/K<br />
+ 9 dB/K<br />
+ 7 dB/K<br />
+ 6 dB/K<br />
+ 4 dB/K<br />
+ 2 dB/K<br />
0 dB/K<br />
- 2 dB/K<br />
w_(iss6.3_jan03).doc - 40 -<br />
+ 12 dB/K<br />
Figure 26 . Illustration of W4 Russian Receive Coverage (36° East)<br />
The W Satellites<br />
W4RUSRx.dsf
50 dBW<br />
48 dBW<br />
46 dBW<br />
44 dBW<br />
42 dBW<br />
52 dBW<br />
51 dBW<br />
Figure 27 . Illustration of W4 Russian Transmit Coverage (36° East)<br />
w_(iss6.3_jan03).doc - 41 -<br />
W4RUSTx.dsf<br />
The W Satellites
- 5 dB/K<br />
- 2 dB/K<br />
0 dB/K<br />
2 dB/K<br />
- 5 dB/K<br />
- 2 dB/K<br />
0 dB/K<br />
2 dB/K<br />
Figure 28 . Illustration of W4 African Receive Coverage (36° East)<br />
w_(iss6.3_jan03).doc - 42 -<br />
W4AfrRx.dsf<br />
The W Satellites
36 dBW<br />
40 dBW<br />
42 dBW<br />
44 dBW<br />
36 dBW<br />
40 dBW<br />
42 dBW<br />
44 dBW<br />
Figure 29 . Illustration of W4 African Transmit Coverage, Channels 30 to 36 (36° East)<br />
w_(iss6.3_jan03).doc - 43 -<br />
W4AfrTxLo.dsf<br />
The W Satellites
36 dBW<br />
40 dBW<br />
42 dBW<br />
44 dBW<br />
45 dBW<br />
36 dBW<br />
40 dBW<br />
42 dBW<br />
44 dBW<br />
45 dBW<br />
Figure 30 . Illustration of W4 African Transmit Coverage, Channels 38 and 40 (36° East)<br />
w_(iss6.3_jan03).doc - 44 -<br />
W4AfrTxHi.dsf<br />
The W Satellites
50 dBW<br />
48 dBW<br />
44 dBW<br />
40 dBW<br />
52 dBW<br />
55 dBW<br />
54 dBW<br />
Figure 31 . Illustration of W4 Transmit Steerable Coverage (36° East)<br />
w_(iss6.3_jan03).doc - 45 -<br />
The W Satellites
UPLINK<br />
DOWNLINK<br />
13.00 GHz<br />
13 041.67<br />
C2 C4 C6<br />
C1 C3 C5<br />
13 041.67<br />
w_(iss6.3_jan03).doc - 46 -<br />
13.25 GHz 13.75 GHz<br />
14.00 GHz 14.25 GHz 14.50 GHz<br />
10.95 GHz 11.20 GHz 11.45 GHz 11.70 GHz 12.50 GHz 12.75 GHz<br />
10 991.67<br />
B1 B3 B5<br />
B2 B4 B6<br />
10 991.67<br />
13 125.00<br />
13 125.00<br />
11 075.00<br />
11 075.00<br />
13 208.33<br />
13 208.33<br />
11 158.33<br />
11 158.33<br />
Switchable to Steerable 1<br />
Switchable to Steerable 2<br />
11 241.67<br />
H2 / D2 H4 / D4 H6 / D6<br />
H1 / D1 H3 / D3 D5<br />
C1 C3 C5<br />
C2 C4 C6<br />
11 241.67<br />
13 791.67<br />
13 791.67<br />
11 325.00<br />
11 325.00<br />
13 875.00<br />
13 875.00<br />
11 408.33<br />
11 408.33<br />
11 491.67<br />
G2 / D2<br />
F2 / G2 F4 / G4 F6 / G6<br />
F1 / G1 F3 / G3 F5<br />
11 575.00<br />
G1 / D1 G3 / D3 D5<br />
11 491.67<br />
G4 / D4<br />
11 575.00<br />
11 658.33<br />
G6 / D6<br />
Figure 32 . EUTELSAT W5 Frequency Plan (Frequencies in MHz)<br />
13 958.33<br />
13 958.33<br />
14 041.67<br />
14 041.67<br />
14 125.00<br />
14 125.00<br />
11 658.33<br />
14 208.33<br />
14 208.33<br />
14 291.67<br />
B2 B4 B6<br />
B1 B3 B5<br />
14 291.67<br />
12 541.67<br />
12 625.00<br />
12 708.33<br />
H1 / F1 H3 / F3 F5<br />
H2 / F2 H4 / F4 H6 / F6<br />
12 541.67<br />
14 375.00<br />
14 375.00<br />
12 625.00<br />
14 458.33<br />
14 458.33<br />
12 708.33<br />
The W Satellites<br />
Pol. X<br />
Pol. Y<br />
Pol. X<br />
Pol. Y
- 6 dB/K<br />
- 4 dB/K<br />
- 2 dB/K<br />
0° 5° 10° 15° 20°<br />
+ 4 dB/K<br />
+ 3 dB/K<br />
+ 2 dB/K<br />
w_(iss6.3_jan03).doc - 47 -<br />
0 dB/K<br />
Figure 33. Illustration of W5 receive coverage (70.5° E)<br />
The W Satellites
0° 5° 10° 15° 20°<br />
44 dBW<br />
42 dBW<br />
40 dBW<br />
38 dBW<br />
44 dBW<br />
w_(iss6.3_jan03).doc - 48 -<br />
48 dBW<br />
47 dBW<br />
47 dBW<br />
46 dBW 46 dBW<br />
Figure 34. Illustration of W5 transmit coverage (70.5° E)<br />
47 dBW<br />
The W Satellites
0° 5° 10° 15° 20°<br />
Figure 35. Examples of W5 Steerable Receive Coverage (-4, -2, 0, +2, +4, +6, +8 & +9 dB/K) (70.5° East)<br />
w_(iss6.3_jan03).doc - 49 -<br />
The W Satellites
0° 5° 10° 15° 20°<br />
Figure 36. Examples of W5 Steerable Transmit Coverage, (40, 42, 44, 46, 48, 50, 52 & 53 dBW) (70.5° East)<br />
w_(iss6.3_jan03).doc - 50 -<br />
The W Satellites
Figure 37 . W1 in-orbit<br />
w_(iss6.3_jan03).doc - 51 -<br />
The W Satellites
Figure 38 . W2 Stowed for launch<br />
w_(iss6.3_jan03).doc - 52 -<br />
The W Satellites
Figure 39 . W4 Stowed for launch<br />
w_(iss6.3_jan03).doc - 53 -<br />
The W Satellites