Simultaneous Nadir Overpasses (SNOs) Predictions

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

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 4/2/2026

Index	Date (NOAA-21)	Time (NOAA-21)	Lat,Lon (NOAA-21)	SZA (NOAA-21 )	Date (LANDSAT-9)	Time (LANDSAT-9)	Lat,Lon (LANDSAT-9)	SZA (LANDSAT-9 )	Distance(km)	Time Diff (sec)
1	04/04/2026	13:38:55	-70.30, 151.58	115.58	04/04/2026	13:39:56	-70.32, 151.65	115.57	3.02	61
2	04/04/2026	14:29:38	70.15, -40.87	64.26	04/04/2026	14:29:24	70.16, -40.93	64.27	2.73	14
3	04/04/2026	15:20:11	-69.57, 127.31	116.36	04/04/2026	15:19:01	-69.66, 126.00	116.23	51.59	70
4	04/07/2026	05:55:48	-70.28, -92.59	116.62	04/07/2026	05:56:24	-70.25, -92.56	116.65	3.14	36
5	04/07/2026	06:46:30	70.13, 74.94	63.22	04/07/2026	06:45:50	70.15, 74.93	63.24	1.84	40
6	04/09/2026	21:22:05	70.75,-144.87	62.88	04/09/2026	21:23:15	70.60,-143.80	62.70	42.70	70
7	04/09/2026	22:12:39	-70.21, 23.30	117.69	04/09/2026	22:12:50	-70.21, 23.26	117.70	1.34	11
8	04/09/2026	23:03:23	70.12,-169.26	62.21	04/09/2026	23:02:17	70.10,-169.25	62.19	2.21	66
9	04/12/2026	13:38:50	70.32, -28.41	61.45	04/12/2026	13:39:46	70.30, -28.35	61.42	3.12	56
10	04/12/2026	14:29:32	-70.20, 139.10	118.69	04/12/2026	14:29:16	-70.19, 139.13	118.70	1.39	16
11	04/12/2026	15:20:03	69.43, -52.44	60.50	04/12/2026	15:18:54	69.48, -54.22	60.60	69.86	69
12	04/15/2026	05:55:42	70.28, 87.46	60.43	04/15/2026	05:56:12	70.25, 87.47	60.40	2.81	30
13	04/15/2026	06:46:24	-70.15,-105.03	119.72	04/15/2026	06:45:42	-70.14,-105.05	119.72	1.08	42

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/2/2026

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/02/2026 in txt file.

Historial Predications of SNOs between NOAA-21 and LANDSAT-9