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ISS Doppler Frequencies



Hello All..

Here is a sample of an overhead pass at my QTH.
Note the Doppler shift as the pass progresses.
I am using using STSPLUS for this prediction.
Doppler samples are taken every 30 seconds.
On UHF Doppler is +- 10.2 Kc and VHF is +- 3.4 Kc

Of course a low elevation pass will have less Doppler by far!
On UHF it is +- 6.2 Kc and VHF is +- 2 Kc See data below.

Good Luck and happy Hamming...

73, Scott WA6LIE
Salinas, Ca.
_____________________________________________________

This is an 89 degree elevation pass.


Satellite Name:         ISS Space Station
Catalog Number:         25544  98067A

Uplink Center Frequency:    437.80000 MHz
Dnlink Center Frequency:    145.80000 MHz
                                                         Freq Diff in Hz
MM/DD     TIME     Sat Lat   Sat Lon  Sat Elv  Sat Azm   Uplink   DnLink
------------------------------------------------------------------------
11/01 06:46:30 UTC  24.127  -135.714    1.653  227.958   -10211     3401
11/01 06:47:00 UTC  25.567  -134.363    3.842  228.023   -10191     3394
11/01 06:47:30 UTC  26.992  -132.977    6.357  228.090   -10151     3381
11/01 06:48:00 UTC  28.400  -131.553    9.344  228.159   -10078     3356
11/01 06:48:30 UTC  29.789  -130.087   13.046  228.231    -9949     3313
11/01 06:49:00 UTC  31.158  -128.578   17.898  228.306    -9718     3236
11/01 06:49:30 UTC  32.505  -127.021   24.738  228.385    -9274     3089
11/01 06:50:00 UTC  33.829  -125.415   35.302  228.473    -8333     2775
11/01 06:50:30 UTC  35.128  -123.755   53.161  228.587    -6121     2039
11/01 06:51:00 UTC  36.399  -122.038   82.453  229.065    -1341      447
11/01 06:51:30 UTC  37.640  -120.261   64.534   48.516     4389    -1462
11/01 06:52:00 UTC  38.849  -118.421   41.919   48.672     7595    -2529
11/01 06:52:30 UTC  40.024  -116.514   28.746   48.774     8949    -2980
11/01 06:53:00 UTC  41.162  -114.538   20.576   48.867     9555    -3182
11/01 06:53:30 UTC  42.260  -112.490   14.996   48.956     9857    -3283
11/01 06:54:00 UTC  43.315  -110.366   10.863   49.045    10021    -3337
11/01 06:54:30 UTC  44.324  -108.166    7.603   49.135    10114    -3368
11/01 06:55:00 UTC  45.284  -105.887    4.905   49.225    10165    -3385
11/01 06:55:30 UTC  46.191  -103.528    2.589   49.316    10191    -3394
11/01 06:56:00 UTC  47.043  -101.088    0.543   49.408    10200    -3397
___________________________________________________________________________________________

This is for a 5 degree elevation pass.


Satellite Name:         ISS Space Station
Catalog Number:         25544  98067A

Uplink Center Frequency:    437.80000 MHz
Dnlink Center Frequency:    145.80000 MHz
                                                         Freq Diff in Hz
MM/DD     TIME     Sat Lat   Sat Lon  Sat Elv  Sat Azm   Uplink   DnLink
------------------------------------------------------------------------
10/07 01:56:34 UTC  35.550  -144.691    0.231  273.440    -6203     2066
10/07 01:57:04 UTC  34.259  -143.010    1.359  268.453    -5487     1827
10/07 01:57:34 UTC  32.942  -141.384    2.396  262.871    -4636     1544
10/07 01:58:04 UTC  31.600  -139.809    3.294  256.695    -3645     1214
10/07 01:58:34 UTC  30.236  -138.283    3.996  249.983    -2523      840
10/07 01:59:04 UTC  28.851  -136.801    4.447  242.857    -1297      432
10/07 01:59:34 UTC  27.447  -135.362    4.607  235.503      -14        5
10/07 02:00:04 UTC  26.026  -133.962    4.458  228.147     1269     -423
10/07 02:00:34 UTC  24.589  -132.598    4.017  221.012     2494     -831
10/07 02:01:04 UTC  23.137  -131.268    3.324  214.285     3616    -1204
10/07 02:01:34 UTC  21.672  -129.968    2.434  208.090     4606    -1534
10/07 02:02:04 UTC  20.194  -128.698    1.404  202.483     5455    -1817
10/07 02:02:34 UTC  18.705  -127.453    0.282  197.470     6170    -2055 
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