Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 20.  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)
 01/22/2023   14:28:26   (  70.84, -41.85) 01/22/2023   14:29:34  (  70.74, -39.98)   69.21                68
 01/22/2023   15:18:55   ( -70.07, 126.69) 01/22/2023   15:19:14  ( -70.08, 126.68)    1.68                19
 01/22/2023   16:09:39   (  69.95, -65.82) 01/22/2023   16:08:41  (  69.97, -65.82)    2.46                58
 01/25/2023   06:45:06   (  70.13,  75.05) 01/25/2023   06:46:09  (  70.14,  75.03)    0.70                63
 01/25/2023   07:35:48   ( -70.04,-117.50) 01/25/2023   07:35:39  ( -70.03,-117.50)    2.06                 9
 01/25/2023   08:26:23   (  69.45,  50.68) 01/25/2023   08:25:13  (  69.53,  49.46)   48.20                70
 01/27/2023   23:01:58   (  70.07,-169.09) 01/27/2023   23:02:33  (  70.09,-169.14)    2.50                35
 01/27/2023   23:52:40   ( -69.98,  -1.63) 01/27/2023   23:52:03  ( -69.98,  -1.66)    1.06                37
 01/30/2023   14:28:13   ( -70.55, 138.63) 01/30/2023   14:29:23  ( -70.44, 139.63)   39.21                70
 01/30/2023   15:18:50   (  70.08, -53.32) 01/30/2023   15:18:55  (  70.05, -53.29)    3.25                 5
 01/30/2023   16:09:31   ( -69.93, 114.22) 01/30/2023   16:08:25  ( -69.94, 114.20)    1.83                66
 02/02/2023   06:44:58   ( -70.14,-104.96) 02/02/2023   06:45:50  ( -70.14,-104.89)    2.50                52
 02/02/2023   07:35:42   (  70.04,  62.51) 02/02/2023   07:35:17  (  70.02,  62.58)    3.44                25