Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between HIMAWARI-9 and NOAA-21 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 8/19/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 08/20/2025 15:55:15 -0.01, 140.77 -0.31, 142.07 147.62 80
2 08/22/2025 04:17:10 0.01, 140.77 -0.91, 136.77 455.68 80
3 08/23/2025 04:01:06 0.00, 140.76 0.12, 141.30 61.51 80
4 08/25/2025 16:04:09 -0.00, 140.74 0.05, 140.56 20.53 80
5 08/26/2025 15:42:44 -0.00, 140.73 -0.98, 145.09 497.28 80
6 08/28/2025 04:04:40 0.00, 140.70 -0.22, 139.79 104.13 80
7 08/29/2025 03:48:35 0.00, 140.69 0.82, 144.32 414.09 80
8 08/30/2025 16:10:23 0.00, 140.67 0.34, 139.05 184.18 80
9 08/31/2025 15:48:58 0.00, 140.65 -0.64, 143.59 334.08 80
10 09/02/2025 04:10:53 -0.01, 140.62 -0.54, 138.29 266.80 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/19/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250820.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/19/2025 in txt file.

Historical Predications of SNOs between HIMAWARI-9 and NOAA-21