Accessable Northern Latitudes
Server sky is theoretically visible from 60° north latitude; however, that places it on the horizon elevation zero degrees, with hundreds of kilometers of attenuating atmosphere between the ground receiver and space.
Assuming 70 GHz, with 0.7 dB/km attenuation and a density lapse rate of 1/7km, the attenuation due south versus latitude is:
lat |
elev |
dist to |
ss angl |
attn |
relative |
deg |
deg |
ss km |
deg |
dB |
loss |
0 |
90.00 |
6418.0 |
0.00 |
4.90 |
1.00 |
5 |
80.07 |
6466.1 |
4.93 |
4.97 |
1.02 |
10 |
70.36 |
6608.1 |
9.64 |
5.20 |
1.07 |
15 |
61.04 |
6836.9 |
13.96 |
5.60 |
1.17 |
20 |
52.24 |
7142.7 |
17.76 |
6.19 |
1.35 |
25 |
44.00 |
7513.9 |
21.00 |
7.05 |
1.64 |
30 |
36.34 |
7938.7 |
23.65 |
8.25 |
2.16 |
35 |
29.23 |
8406.0 |
25.77 |
10.00 |
3.24 |
40 |
22.62 |
8905.9 |
27.38 |
12.66 |
5.97 |
45 |
16.46 |
9429.7 |
28.54 |
17.08 |
16.53 |
50 |
10.69 |
9970.0 |
29.31 |
25.67 |
119.29 |
55 |
5.26 |
10520.4 |
29.74 |
48.26 |
21654.10 |
60 |
0.12 |
11075.6 |
29.88 |
76.25 |
&inf; |
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