Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 5 17.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 05/19/2025   14:28:22   (  70.15, -40.85) 05/19/2025   14:29:03  (  70.17, -40.92)    3.45                41
 05/19/2025   15:19:04   ( -70.07, 126.59) 05/19/2025   15:18:33  ( -70.06, 126.55)    2.28                31
 05/22/2025   05:54:46   ( -70.81, -93.45) 05/22/2025   05:55:55  ( -70.75, -91.83)   59.48                69
 05/22/2025   06:45:20   (  70.16,  74.90) 05/22/2025   06:45:31  (  70.15,  74.94)    1.38                11
 05/22/2025   07:36:01   ( -70.03,-117.58) 05/22/2025   07:35:01  ( -70.04,-117.59)    1.71                60
 05/24/2025   22:11:31   ( -70.19,  23.30) 05/24/2025   22:12:31  ( -70.21,  23.26)    2.63                60
 05/24/2025   23:02:16   (  70.12,-169.28) 05/24/2025   23:01:58  (  70.11,-169.25)    1.49                18
 05/24/2025   23:52:47   ( -69.46,  -0.98) 05/24/2025   23:51:37  ( -69.50,  -2.45)   57.70                70
 05/27/2025   14:28:28   ( -70.16, 139.11) 05/27/2025   14:28:59  ( -70.14, 139.04)    3.42                31
 05/27/2025   15:19:13   (  70.08, -53.46) 05/27/2025   15:18:25  (  70.09, -53.40)    2.62                48
 05/30/2025   05:54:44   (  70.26,  87.39) 05/30/2025   05:55:55  (  70.26,  87.46)    2.38                71
 05/30/2025   06:45:25   ( -70.13,-105.08) 05/30/2025   06:45:25  ( -70.15,-105.06)    2.37                 0
 05/30/2025   07:36:07   (  69.89,  62.58) 05/30/2025   07:34:54  (  69.93,  62.27)   12.62                73