Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 7/20/2023
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 07/22/2023 23:51:09 -70.01, -1.66 130.16 07/22/2023 23:51:35 -70.00, -1.64 130.17 0.79 26
2 07/23/2023 00:41:53 69.90, 165.82 49.73 07/23/2023 00:41:02 69.90, 165.87 49.75 2.05 51
3 07/25/2023 15:17:21 70.17, -53.45 50.57 07/25/2023 15:18:32 70.16, -53.16 50.53 11.26 71
4 07/25/2023 16:08:01 -69.97, 114.17 129.64 07/25/2023 16:08:03 -69.99, 114.24 129.62 3.10 2
5 07/25/2023 16:58:44 69.81, -78.28 50.21 07/25/2023 16:57:31 69.83, -78.34 50.24 3.11 73
6 07/28/2023 07:34:11 70.04, 62.52 51.03 07/28/2023 07:35:01 70.06, 62.59 51.04 3.00 50
7 07/28/2023 08:24:53 -69.94,-130.01 129.07 07/28/2023 08:24:31 -69.95,-129.93 129.06 2.97 22
8 07/28/2023 09:15:20 68.94, 38.75 49.89 07/28/2023 09:14:13 69.01, 36.45 50.07 91.83 67
9 07/30/2023 23:51:02 69.97, 178.41 51.60 07/30/2023 23:51:29 69.98, 178.38 51.60 1.47 27
10 07/31/2023 00:41:44 -69.87, -14.12 128.51 07/31/2023 00:40:59 -69.88, -14.14 128.50 0.64 45
11 08/02/2023 15:17:14 -70.32, 126.34 127.38 08/02/2023 15:18:25 -70.21, 126.96 127.52 26.45 71
12 08/02/2023 16:07:53 69.96, -65.80 52.26 08/02/2023 16:07:55 69.94, -65.79 52.22 3.24 2
13 08/02/2023 16:58:34 -69.81, 101.75 127.90 08/02/2023 16:57:25 -69.83, 101.70 127.87 3.28 69

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/20/2023
SNOs_Map_NOAA-21_LANDSAT-9_20230721.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/20/2023 in txt file.

Historial Predications of SNOs between NOAA-21 and LANDSAT-9