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Architecture
TABLE -1
Number of Satellites
Required for different SATCOM Architectures
No of Active S/C
for full contiiiuous
(a) Proliferated LEO 240
(c) Indined Elliptical Orbit
(cl) LOOPUS 9
(C2) MOLNIYA
3 x 12 - hrs
(a) TUNDRA
2 x 24 - hrs
2 x 24 - hrs
(a GEO 1 Baseline
~-
~~
(e) Svstems of Satellites in more than one Orbit
(el) GEO + Polar 1 GEO + 6 Polar S/C in GEO are
(82) GEO +24-hr MOLNIYA
dual frequency singk
in Polar orbit
(a) Dual freq S/C in 1 GEO GEO S/C have
GEO +single in t 2 inclined EHF and SHF
Inclined Orbit
Inclined EHF or SHF
(b) Single freq in 2 GEO GEO S/C are air
both orbits + 2 inclined of EHF and SHF
Inclined EHF or SHF
(f) CLOUDSAT Receive S/C Numbers will depend
with lOdB ECCM 20 GEO. 20 Inc. on jamming threat
advantage TX S/C:- at the time
relativu to (e2)b 2 GEO t 2 Inc
I
No of S/C
for 7 years
> 240
27
9
G
6
3
3 GEO
+
18 Polar .
3 GEO
+
6 inclined
6 GEO
t
6 inclined
60 GEO
60 Inclined
6 GEO
6 inclined
(8) M ~ S The basic concapt applies lo all case (c) thro' (f)
Total No of
s/C tor
21 years
--
> 500
81
27
18
18
9
9 GEO
+
54 Polar
9 GEO
+
18 inclined
18 GEO
+
18 inclined
180 GEO
180 inclined
18 GEO
18 inclined