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: 2/21/2025
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 02/22/2025 14:16:22 -70.15, 142.18 99.84 02/22/2025 14:17:21 -70.14, 142.15 99.86 1.29 59
2 02/22/2025 15:07:06 70.04, -50.33 80.02 02/22/2025 15:06:48 70.04, -50.35 80.03 0.75 18
3 02/22/2025 15:57:37 -69.37, 117.97 100.70 02/22/2025 15:56:27 -69.43, 116.45 100.56 59.79 70
4 02/25/2025 06:33:14 -70.14,-102.02 100.85 02/25/2025 06:33:47 -70.13,-101.98 100.87 1.99 33
5 02/25/2025 07:23:58 70.02, 65.47 79.02 02/25/2025 07:23:14 70.02, 65.51 79.02 1.57 44
6 02/27/2025 21:59:30 70.49,-154.10 78.53 02/27/2025 22:00:40 70.40,-153.34 78.39 30.13 70
7 02/27/2025 22:50:06 -70.09, 13.85 101.92 02/27/2025 22:50:14 -70.07, 13.82 101.94 2.57 8
8 02/27/2025 23:40:50 69.97,-178.66 77.95 02/27/2025 23:39:41 69.96,-178.69 77.95 1.90 69
9 03/02/2025 14:16:17 70.19, -37.83 77.18 03/02/2025 14:17:09 70.18, -37.76 77.16 2.91 52
10 03/02/2025 15:06:58 -70.05, 129.70 102.98 03/02/2025 15:06:39 -70.07, 129.72 102.96 2.78 19
11 03/02/2025 15:57:27 69.13, -61.66 76.05 03/02/2025 15:56:20 69.18, -63.84 76.20 86.44 67
12 03/05/2025 06:33:08 70.11, 78.08 76.06 03/05/2025 06:33:34 70.14, 78.08 76.09 3.65 26
13 03/05/2025 07:23:50 -70.02,-114.47 104.05 03/05/2025 07:23:04 -70.03,-114.44 104.03 1.89 46

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 2/21/2025
SNOs_Map_NPP_LANDSAT-9_20250221.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 02/21/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9