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: 7/19/2023
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 07/20/2023 07:34:17 -70.04,-117.48 130.65 07/20/2023 07:35:06 -70.05,-117.46 130.65 2.00 49
2 07/20/2023 08:25:01 69.93, 49.99 49.25 07/20/2023 08:24:34 69.90, 49.97 49.22 3.29 27
3 07/20/2023 09:15:25 -68.88,-141.19 131.85 07/20/2023 09:14:19 -68.95,-143.66 131.66 98.88 66
4 07/22/2023 23:51:09 -69.99, -1.64 130.17 07/22/2023 23:51:35 -70.02, -1.62 130.16 2.57 26
5 07/23/2023 00:41:53 69.89, 165.83 49.73 07/23/2023 00:41:03 69.86, 165.81 49.70 3.44 50
6 07/25/2023 15:17:21 70.17, -53.44 50.57 07/25/2023 15:18:33 70.12, -53.21 50.50 10.09 72
7 07/25/2023 16:08:01 -69.96, 114.19 129.65 07/25/2023 16:08:04 -69.95, 114.19 129.66 0.76 3
8 07/25/2023 16:58:44 69.80, -78.27 50.20 07/25/2023 16:57:32 69.79, -78.40 50.20 5.00 72
9 07/28/2023 07:34:11 70.04, 62.53 51.03 07/28/2023 07:35:02 70.03, 62.55 51.01 1.14 51
10 07/28/2023 08:24:53 -69.93,-129.99 129.08 07/28/2023 08:24:32 -69.92,-129.97 129.09 1.91 21
11 07/28/2023 09:15:20 68.93, 38.75 49.88 07/28/2023 09:14:14 68.98, 36.42 50.04 93.58 66
12 07/30/2023 23:51:01 69.97, 178.42 51.59 07/30/2023 23:51:29 69.97, 178.35 51.58 2.40 28
13 07/31/2023 00:41:43 -69.86, -14.11 128.52 07/31/2023 00:40:59 -69.86, -14.16 128.51 2.00 44

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/19/2023
SNOs_Map_NOAA-21_LANDSAT-9_20230719.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/19/2023 in txt file.

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