Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 15.  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)
 03/16/2023   23:01:39   (  70.08,-169.17) 03/16/2023   23:02:39  (  70.10,-169.25)    3.65                60
 03/16/2023   23:52:21   ( -69.99,  -1.71) 03/16/2023   23:52:09  ( -69.99,  -1.77)    2.09                12
 03/17/2023   00:42:54   (  69.29, 166.62) 03/17/2023   00:41:45  (  69.39, 165.05)   62.19                69
 03/19/2023   15:18:32   (  70.09, -53.41) 03/19/2023   15:19:07  (  70.09, -53.38)    1.06                35
 03/19/2023   16:09:14   ( -70.00, 114.05) 03/19/2023   16:08:37  ( -69.98, 114.10)    2.69                37
 03/22/2023   06:44:50   ( -70.70,-105.89) 03/22/2023   06:46:00  ( -70.58,-104.43)   55.48                70
 03/22/2023   07:35:23   (  70.01,  62.49) 03/22/2023   07:35:35  (  70.03,  62.42)    3.25                12
 03/22/2023   08:26:05   ( -69.92,-130.05) 03/22/2023   08:25:05  ( -69.92,-130.10)    1.94                60
 03/24/2023   23:01:31   ( -70.11,  10.82) 03/24/2023   23:02:35  ( -70.09,  10.74)    3.47                64
 03/24/2023   23:52:15   (  70.00, 178.28) 03/24/2023   23:52:01  (  70.03, 178.30)    2.69                14
 03/25/2023   00:42:49   ( -69.48, -13.63) 03/25/2023   00:41:38  ( -69.54, -14.74)   43.56                71
 03/27/2023   15:18:22   ( -70.11, 126.59) 03/27/2023   15:18:59  ( -70.09, 126.64)    2.50                37
 03/27/2023   16:09:05   (  69.95, -65.87) 03/27/2023   16:08:26  (  69.97, -65.88)    2.12                39