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: 9/22/2025

Index	Date	Time (HIMAWARI-9)	HIMAWARI-9 Lat,Lon	NOAA-21 Lat,Lon	Distance(km)	Time Diff (sec)
1	09/23/2025	04:16:57	0.03, 140.72	-0.82, 136.82	444.03	80
2	09/24/2025	04:00:52	0.03, 140.69	0.19, 141.36	76.40	80
3	09/26/2025	16:01:14	-0.03, 140.60	-0.04, 140.62	2.45	80
4	09/29/2025	04:04:23	0.03, 140.52	-0.10, 139.86	75.23	80
5	09/30/2025	03:48:18	0.04, 140.48	0.91, 144.39	445.66	80
6	10/01/2025	16:10:05	-0.04, 140.42	0.23, 139.12	147.56	80
7	10/02/2025	15:48:40	-0.05, 140.38	-0.78, 143.65	373.54	80
8	10/04/2025	04:10:35	0.05, 140.32	-0.36, 138.35	223.68	80
9	10/05/2025	03:54:30	0.05, 140.27	0.65, 142.88	298.23	80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/22/2025

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/22/2025 in txt file.

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