Simultaneous Nadir Overpasses (SNOs) Predictions

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

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 8/9/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (TERRA) Time (TERRA) Lat,Lon (TERRA) SZA (TERRA ) Distance(km) Time Diff (sec)
1 08/10/2025 11:00:57 -74.12,-176.46 120.95 08/10/2025 11:01:10 -74.14,-176.45 120.94 1.82 13
2 08/10/2025 11:51:41 74.06, -8.99 58.99 08/10/2025 11:50:30 74.06, -8.96 59.01 0.92 71
3 08/12/2025 21:22:38 74.13,-151.90 59.78 08/12/2025 21:22:48 74.14,-151.92 59.78 0.70 10
4 08/12/2025 22:13:21 -74.05, 15.62 120.31 08/12/2025 22:12:09 -74.08, 15.63 120.26 3.57 72
5 08/15/2025 06:53:49 74.89, 63.36 61.38 08/15/2025 06:54:54 74.82, 66.54 61.09 92.74 65
6 08/15/2025 07:44:19 -74.17,-127.42 119.44 08/15/2025 07:44:27 -74.15,-127.35 119.47 3.28 8
7 08/15/2025 08:35:00 73.97, 40.40 60.35 08/15/2025 08:33:47 74.05, 40.11 60.47 13.08 73
8 08/17/2025 17:15:28 -74.83, 88.11 117.93 08/17/2025 17:16:34 -74.77, 90.96 118.19 83.44 66
9 08/17/2025 18:05:59 74.15,-102.77 61.30 08/17/2025 18:06:04 74.15,-102.81 61.30 1.39 5
10 08/17/2025 18:56:40 -73.96, 65.00 118.90 08/17/2025 18:55:27 -74.01, 64.54 118.81 15.00 73
11 08/20/2025 03:37:06 74.72, 113.01 62.72 08/20/2025 03:38:14 74.59, 115.08 62.45 62.43 68
12 08/20/2025 04:27:39 -74.14, -78.17 117.93 08/20/2025 04:27:43 -74.14, -78.28 117.92 3.37 4
13 08/20/2025 05:18:17 73.79, 90.00 61.69 08/20/2025 05:17:06 73.87, 88.80 61.87 38.29 71
14 08/22/2025 13:58:45 -74.66, 137.74 116.55 08/22/2025 13:59:54 -74.52, 139.46 116.81 53.15 69
15 08/22/2025 14:49:20 74.17, -53.67 62.91 08/22/2025 14:49:18 74.19, -53.62 62.93 2.77 2

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 8/9/2025
SNOs_Map_NOAA-21_TERRA_20250809.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 08/09/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA