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: 9/5/2025

Index	Date	Time (HIMAWARI-9)	HIMAWARI-9 Lat,Lon	NOAA-21 Lat,Lon	Distance(km)	Time Diff (sec)
1	09/07/2025	04:17:06	0.04, 140.75	-0.86, 136.78	452.65	80
2	09/08/2025	04:01:02	0.04, 140.74	0.19, 141.31	65.94	80
3	09/10/2025	16:01:24	-0.04, 140.69	0.01, 140.58	13.05	80
4	09/13/2025	04:04:33	0.04, 140.65	-0.17, 139.82	95.10	80
5	09/14/2025	03:48:29	0.04, 140.63	0.89, 144.34	423.84	80
6	09/15/2025	16:10:16	-0.04, 140.59	0.29, 139.07	172.94	80
7	09/16/2025	15:48:51	-0.04, 140.57	-0.71, 143.61	346.26	80
8	09/18/2025	04:10:46	0.05, 140.53	-0.43, 138.30	253.54	80
9	09/19/2025	03:54:41	0.05, 140.50	0.57, 142.84	266.59	80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/5/2025

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/05/2025 in txt file.

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