Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 1.  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)
 02/02/2023   06:45:12   ( -70.85,-106.09) 02/02/2023   06:46:20  ( -70.76,-104.16)   71.61                68
 02/02/2023   07:35:43   (  70.06,  62.48) 02/02/2023   07:35:58  (  70.06,  62.46)    0.91                15
 02/02/2023   08:26:25   ( -69.97,-130.07) 02/02/2023   08:25:28  ( -69.95,-130.07)    2.48                57
 02/04/2023   23:01:51   ( -70.13,  10.83) 02/04/2023   23:03:02  ( -70.13,  10.79)    1.73                71
 02/04/2023   23:52:35   (  70.02, 178.31) 02/04/2023   23:52:29  (  70.03, 178.28)    1.60                 6
 02/05/2023   00:43:14   ( -69.77, -14.00) 02/05/2023   00:42:01  ( -69.81, -14.39)   15.53                73
 02/07/2023   15:18:42   ( -70.10, 126.66) 02/07/2023   15:19:32  ( -70.08, 126.59)    3.26                50
 02/07/2023   16:09:26   (  69.98, -65.86) 02/07/2023   16:08:59  (  69.97, -65.92)    2.45                27
 02/07/2023   16:59:51   ( -68.99, 102.88) 02/07/2023   16:58:44  ( -69.04, 100.46)   96.60                67
 02/10/2023   07:35:34   ( -70.07,-117.52) 02/10/2023   07:36:02  ( -70.06,-117.56)    1.71                28
 02/10/2023   08:26:18   (  69.96,  49.95) 02/10/2023   08:25:29  (  69.95,  49.93)    1.10                49
 02/12/2023   23:01:48   (  70.35,-169.50) 02/12/2023   23:02:59  (  70.29,-168.99)   20.20                71
 02/12/2023   23:52:26   ( -70.04,  -1.71) 02/12/2023   23:52:32  ( -70.02,  -1.74)    2.31                 6
 02/13/2023   00:43:10   (  69.94, 165.76) 02/13/2023   00:41:59  (  69.91, 165.74)    2.92                71