Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 3.  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)
 02/04/2023   23:01:51   ( -70.17,  10.78) 02/04/2023   23:03:01  ( -70.15,  10.81)    2.32                70
 02/04/2023   23:52:35   (  70.05, 178.26) 02/04/2023   23:52:28  (  70.05, 178.31)    1.83                 7
 02/05/2023   00:43:13   ( -69.75, -13.97) 02/05/2023   00:42:00  ( -69.82, -14.37)   17.12                73
 02/07/2023   15:18:43   ( -70.13, 126.60) 02/07/2023   15:19:31  ( -70.15, 126.68)    3.19                48
 02/07/2023   16:09:26   (  69.97, -65.84) 02/07/2023   16:08:59  (  69.99, -65.90)    3.35                27
 02/07/2023   16:59:51   ( -68.98, 102.90) 02/07/2023   16:58:45  ( -68.99, 100.40)   99.79                66
 02/10/2023   07:35:34   ( -70.05,-117.50) 02/10/2023   07:36:02  ( -70.07,-117.56)    2.70                28
 02/10/2023   08:26:18   (  69.94,  49.97) 02/10/2023   08:25:29  (  69.96,  49.93)    2.29                49
 02/12/2023   23:01:47   (  70.34,-169.48) 02/12/2023   23:02:58  (  70.29,-169.00)   19.15                71
 02/12/2023   23:52:25   ( -70.03,  -1.70) 02/12/2023   23:52:31  ( -70.02,  -1.75)    2.70                 6
 02/13/2023   00:43:09   (  69.93, 165.77) 02/13/2023   00:41:58  (  69.91, 165.74)    2.59                71
 02/15/2023   15:18:35   (  70.12, -53.37) 02/15/2023   15:19:30  (  70.10, -53.38)    1.74                55
 02/15/2023   16:09:17   ( -70.02, 114.10) 02/15/2023   16:09:00  ( -70.00, 114.11)    2.12                17
 02/15/2023   16:59:47   (  69.17, -77.36) 02/15/2023   16:58:39  (  69.22, -79.30)   77.01                68