Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and NOAA-19 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 4/11/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (NOAA-19) Time (NOAA-19) Lat,Lon (NOAA-19) SZA (NOAA-19 ) Distance(km) Time Diff (sec)
1 04/12/2025 05:03:45 -70.73, -80.54 118.08 04/12/2025 05:02:38 -70.71, -82.99 117.99 90.00 67
2 04/12/2025 05:54:42 71.33, 85.76 62.54 04/12/2025 05:53:28 71.32, 85.32 62.56 15.57 74
3 04/12/2025 06:45:29 -71.47,-107.17 117.33 04/12/2025 06:44:20 -71.46,-107.15 117.33 1.40 69
4 04/12/2025 07:36:15 71.49, 60.09 62.69 04/12/2025 07:35:21 71.50, 60.18 62.71 3.22 54
5 04/12/2025 08:26:59 -71.48,-132.56 117.34 04/12/2025 08:26:16 -71.49,-132.57 117.32 1.23 43
6 04/12/2025 09:17:45 71.51, 34.70 62.68 04/12/2025 09:17:18 71.48, 34.66 62.66 3.04 27
7 04/12/2025 10:08:30 -71.54,-158.05 117.30 04/12/2025 10:08:12 -71.52,-158.00 117.32 2.89 18
8 04/12/2025 10:59:15 71.52, 9.30 62.67 04/12/2025 10:59:14 71.51, 9.23 62.66 2.55 1
9 04/12/2025 11:50:00 -71.55, 176.56 117.32 04/12/2025 11:50:08 -71.55, 176.58 117.32 0.70 8
10 04/12/2025 12:40:46 71.58, -16.18 62.71 04/12/2025 12:41:09 71.59, -16.10 62.72 3.45 23
11 04/12/2025 13:31:30 -71.56, 151.16 117.33 04/12/2025 13:32:04 -71.58, 151.15 117.31 2.39 34
12 04/12/2025 14:22:16 71.59, -41.58 62.69 04/12/2025 14:23:06 71.57, -41.62 62.67 2.28 50
13 04/12/2025 15:13:01 -71.62, 125.68 117.29 04/12/2025 15:14:00 -71.61, 125.73 117.31 2.05 59
14 04/12/2025 16:03:48 71.70, -67.16 62.79 04/12/2025 16:05:01 71.66, -66.95 62.72 9.06 73
15 04/12/2025 16:54:39 -72.05, 99.52 116.87 04/12/2025 16:55:49 -72.00, 100.98 116.98 50.50 70

Figure of NOAA-21 and NOAA-19 satellite orbits during SNOs since TLE Epoch: 4/11/2025
SNOs_Map_NOAA-21_NOAA-19_20250411.jpg

Download SNOs between NOAA-21 and NOAA-19 since TLE EPOCH: 04/11/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and NOAA-19