Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NPP and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 4/28/2025
Index Date (NPP) Time (NPP) Lat,Lon (NPP) SZA (NPP ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 04/30/2025 05:42:58 70.26, 90.52 55.32 04/30/2025 05:43:55 70.26, 90.53 55.32 0.33 57
2 04/30/2025 06:33:40 -70.17,-102.02 124.79 04/30/2025 06:33:25 -70.14,-102.00 124.81 2.42 15
3 04/30/2025 07:24:10 69.36, 66.49 54.38 04/30/2025 07:23:02 69.43, 64.66 54.50 71.93 68
4 05/02/2025 21:59:55 70.22,-153.66 54.48 05/02/2025 22:00:23 70.21,-153.67 54.46 1.53 28
5 05/02/2025 22:50:37 -70.12, 13.81 125.63 05/02/2025 22:49:53 -70.10, 13.81 125.66 2.80 44
6 05/05/2025 13:26:11 -70.41, 154.50 126.09 05/05/2025 13:27:23 -70.33, 154.75 126.18 12.23 72
7 05/05/2025 14:16:53 70.20, -37.86 53.68 05/05/2025 14:16:51 70.17, -37.84 53.65 3.17 2
8 05/05/2025 15:07:34 -70.04, 129.70 126.49 05/05/2025 15:06:21 -70.06, 129.64 126.47 3.41 73
9 05/08/2025 05:43:06 -70.23, -89.45 127.02 05/08/2025 05:43:51 -70.25, -89.48 127.00 3.11 45
10 05/08/2025 06:33:50 70.13, 78.01 52.87 05/08/2025 06:33:18 70.14, 78.00 52.89 1.23 32
11 05/10/2025 21:09:31 70.81,-141.93 52.89 05/10/2025 21:10:40 70.73,-140.53 52.77 52.33 69
12 05/10/2025 22:00:04 -70.22, 26.33 127.74 05/10/2025 22:00:17 -70.24, 26.39 127.72 3.05 13
13 05/10/2025 22:50:46 70.07,-166.13 52.11 05/10/2025 22:49:44 70.07,-166.21 52.11 3.01 62

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/28/2025
SNOs_Map_NPP_LANDSAT-9_20250428.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/28/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9