Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 22.  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)
 10/23/2025   23:01:54   ( -70.12,  10.81) 10/23/2025   23:02:52  ( -70.10,  10.82)    1.66                58
 10/23/2025   23:52:38   (  69.97, 178.34) 10/23/2025   23:52:19  (  69.99, 178.31)    2.96                19
 10/24/2025   00:43:08   ( -69.28, -13.33) 10/24/2025   00:41:59  ( -69.33, -14.96)   64.21                69
 10/26/2025   15:18:44   ( -70.08, 126.67) 10/26/2025   15:19:19  ( -70.09, 126.70)    2.42                35
 10/26/2025   16:09:28   (  69.94, -65.81) 10/26/2025   16:08:47  (  69.93, -65.89)    2.86                41
 10/29/2025   06:45:01   (  70.59,  74.34) 10/29/2025   06:46:11  (  70.43,  75.45)   44.64                70
 10/29/2025   07:35:34   ( -70.05,-117.50) 10/29/2025   07:35:46  ( -70.05,-117.47)    1.12                12
 10/29/2025   08:26:18   (  69.91,  50.01) 10/29/2025   08:25:13  (  69.94,  50.02)    2.75                65
 10/31/2025   23:01:42   (  70.10,-169.10) 10/31/2025   23:02:42  (  70.13,-169.10)    3.13                60
 10/31/2025   23:52:24   ( -70.03,  -1.68) 10/31/2025   23:52:12  ( -70.02,  -1.61)    2.50                12
 11/01/2025   00:42:58   (  69.37, 166.61) 11/01/2025   00:41:48  (  69.41, 165.19)   55.57                70
 11/03/2025   15:18:30   (  70.04, -53.22) 11/03/2025   15:19:07  (  70.06, -53.30)    3.28                37
 11/03/2025   16:09:12   ( -69.97, 114.21) 11/03/2025   16:08:37  ( -69.95, 114.19)    1.63                35