Propagation Effects Handbook for Satellite Systems - DESCANSO ...

More documents

Recommendations

Info

Satellite longitude Curves are for US Standard Atatosphere with 7.5 g\cm3 water vapor and \ 50 % cloud cover. The Earth Coverage antenna pattern is given by ~ 1 2 G(o) = -3[&5 dB for O S @ s 8.715 Where @ is the angle off of boresight. (Njoku and Smith - 1985) Figure 6.9-1. Weighted Brightness Temperature of the Earth as a Function of Longitude, Viewed from Geostationary Orbit at Frequencies between 1 and 51 GHz. 6-144
280 260 240 220 200 180 160 140 120 100 90 o - LAND SEA {j f 13.5° du 10 20 30 FREOUENCY (Gtiz) )O = 85° 0 = GREAT CIRCLE DEGREES FROM SUBSATELLITE POINT 40 50 60 Figure 6.9-2. Brightness Temperature Contributions for Land and Sea, as a Function of Frequency and Latitude. 6-145
Page 1 and 2:
1 6.1 INTRODUCTION 6.1.1 purpose CH
Page 3 and 4:
,s Table 6.1-1. Guide to Sample Cal
Page 5 and 6:
I . . 6.1.4 Other Propagation Effec
Page 7 and 8:
. . collisions at normal atmospheri
Page 9 and 10:
D 1000 100 10 1 U.S. Standard Atmos
Page 11 and 12:
Frequency (GHz) 10 15 20 30 40 80 1
Page 13 and 14:
If PW is not available from local w
Page 15 and 16:
. . The equivalent heights for oxyg
Page 17 and 18:
m t TEMPERATURE rC) o 5 10 15 20 25
Page 19 and 20:
6.3 PREDICTION OF CUMULATIVE STATIS
Page 21 and 22:
LSTATION LOCATION AND ELEVATION STE
Page 23 and 24:
The models require the following in
Page 25 and 26:
I z za E 100 g w ~ z z K 50 a) ALL
Page 27 and 28:
B . . . t- I I I I I 1 11/1 - . . .
Page 29 and 30:
.- . 9 s@EQ - If Z S D, compute the
Page 31 and 32:
1 0.02 0.05 0.2 0.5 4. Compute D: U
Page 33 and 34:
I . ,. . ~ q 8 H v ~ 1.0 0.8 0.6 0.
Page 35 and 36:
Step 6 Calculate the attenuation ex
Page 37 and 38:
m I : STEP 1 SELECT CLIMATE ZONE FR
Page 39 and 40:
9 10.OOOO 1.0000 0,1ooo 0.0100 0.00
Page 41 and 42:
1 6.3.3 Estimates of Attenuation Gi
Page 43 and 44:
● We now proceed exactly as in th
Page 45 and 46:
STEP 1 GIVEN: STATION PARAMETERS SA
Page 47 and 48:
. B . . . 4. Repeat the process for
Page 49 and 50:
. . ● 100 10 1.0 .1 .01 . . RAIN
Page 51 and 52:
not normally available~ but empiric
Page 53 and 54:
● The intensity-duration-frequenc
Page 55 and 56:
- GIVEN: STATION PARAMETERS OPERATI
Page 57 and 58:
m I s 70 2(J I 10 0 a) BY SEASONS
Page 59 and 60:
.“ ● change in rain rater the r
Page 61 and 62:
m To x o 6 x(n wux!- (5 zawwvxw x 1
Page 63 and 64:
● ✎ ✎ ✎ 10 1 0.1 0.01 0 . -
Page 65 and 66:
● ✎ ✎ ✎ appears to be gener
Page 67 and 68:
6.4.2.3 Statistics of Microwave Eff
Page 69 and 70:
● For each hour’s observations,
Page 71 and 72:
Plots of noise temperature and atte
Page 73 and 74:
.- I where Lf is the fog extent~ in
Page 75 and 76:
than a minute and on spatial scales
Page 77 and 78:
. . . 022 = angle-of-arrival varian
Page 79 and 80:
B . . Figure 6.5-2 represents the a
Page 81 and 82:
- . . , 1 I t , 3 , I 1 # 1 1 aJ 0a
Page 83 and 84:
I . . -. % i ! ~ * 76.00 I h 60.00
Page 85 and 86:
I where the constants are the same
Page 87 and 88:
.U . . \ Table 6.5-1. Fading Data P
Page 89 and 90:
o -5C \ A — . \ \ \ \ N- ● ●
Page 91 and 92:
I 1 \ 0,, FADE DEPTHS I 1 l.d 0.1 1
Page 93 and 94: 9 m ELEVATION ANGLE [DEGREESI ELEVA
Page 95 and 96: Figure 6.5-12 is an example for thi
Page 97 and 98: equal. The fade distributions resul
Page 99 and 100: m . ANTENNA BEAMVVID~ (DEG) d o 0 w
Page 101 and 102: . . 6.5.5.2.2 Spatial Diversity. Pa
Page 103 and 104: fluctuation power at 1 Hz is on the
Page 105 and 106: develops (Pruppacher and Pitter-197
Page 107 and 108: .8 where: f = frequency, in GHz r =
Page 109 and 110: B . k 11.7 26 \ QHz DATA, CTS A VPl
Page 111 and 112: \ for the 11.7 GHz CTS beacon at 50
Page 113 and 114: ● these do not correlate well wit
Page 115 and 116: . However the XPD dependence on ele
Page 117 and 118: -. 50 40 30 20 10 0 . T(XPD < ABCIS
Page 119 and 120: 9 electrostatic fields discharge ra
Page 121 and 122: , f w m I
Page 123 and 124: . XPD 2 = XPD1 - 20 lo91~ f ~ 1 0.4
Page 125 and 126: ● 3.0 14 0.6 0.3 0,1 0.0s 0.03 0.
Page 127 and 128: where, for example, for the frequen
Page 129 and 130: L .- . ., not appear to be sufficie
Page 131 and 132: D ‘1 may be considered to be rece
Page 133 and 134: D - 0 m a 80 60 40 20 0 -20 \ — i
Page 135 and 136: m I s 1 \\ I , t Frequency (GHz) Fi
Page 137 and 138: -. Table 6.8-1. Cumulative Statisti
Page 139 and 140: D - The propagation margin is then
Page 141 and 142: 1- * w -180 -190 -m -21 / ---+---4~
Page 143: - . . 6.9 UPLINK NOISE IN SATELLITE
Page 147 and 148: 6.10 REFERENCES Ahmed, I.Y. and L.J
Page 149 and 150: ● International Telecommunication
Page 151 and 152: Atmospheric Emission observations,
Page 153 and 154: 8.6 and 3.2 mm Radio Waves by Cloud
Page 155 and 156: I Strickland, J.I. (1974), “Radar
Page 157: D Wulfsberg, K.N. (1964), “Appare
show all

Propagation Effects Handbook for Satellite Systems - DESCANSO ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?