Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between GOES-18 and NOAA-21 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 7/25/2025
Index Date Time (GOES-18) GOES-18 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 07/26/2025 10:21:48 -0.03,-136.98 -0.69,-133.96 343.08 80
2 07/27/2025 22:41:06 0.04,-136.99 -0.48,-139.27 260.38 80
3 07/28/2025 22:25:01 0.04,-136.99 0.53,-134.74 256.24 80
4 07/30/2025 10:44:08 -0.04,-136.99 0.67,-140.01 345.12 80
5 07/31/2025 10:28:05 -0.04,-136.99 -0.40,-135.49 171.14 80
6 08/01/2025 22:47:21 0.05,-136.99 -0.81,-140.79 433.39 80
7 08/02/2025 22:31:17 0.05,-136.98 0.21,-136.26 82.33 80
8 08/05/2025 10:31:40 -0.06,-136.95 -0.02,-137.00 6.25 80
9 08/07/2025 22:34:52 0.07,-136.93 -0.10,-137.78 96.73 80

Figure of GOES-18 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 7/25/2025
SNOs_Map_GOES-18_NOAA-21_20250726.jpg

Download SNOs between GOES-18 and NOAA-21 since TLE EPOCH: 07/25/2025 in txt file.

Historical Predications of SNOs between GOES-18 and NOAA-21