Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 5.  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)
 03/06/2023   06:44:59   ( -70.56,-105.68) 03/06/2023   06:46:09  ( -70.45,-104.61)   41.72                70
 03/06/2023   07:35:35   (  70.03,  62.46) 03/06/2023   07:35:42  (  70.02,  62.41)    2.41                 7
 03/06/2023   08:26:17   ( -69.94,-130.09) 03/06/2023   08:25:11  ( -69.96,-130.04)    2.67                66
 03/08/2023   23:01:45   ( -70.13,  10.76) 03/08/2023   23:02:41  ( -70.11,  10.79)    2.00                56
 03/08/2023   23:52:29   (  70.02, 178.24) 03/08/2023   23:52:08  (  70.00, 178.28)    2.06                21
 03/09/2023   00:42:58   ( -69.24, -13.30) 03/09/2023   00:41:49  ( -69.29, -15.06)   69.57                69
 03/11/2023   15:18:37   ( -70.08, 126.62) 03/11/2023   15:19:06  ( -70.05, 126.59)    2.83                29
 03/11/2023   16:09:21   (  69.97, -65.91) 03/11/2023   16:08:33  (  69.94, -65.92)    3.26                48
 03/14/2023   06:44:49   (  70.19,  74.90) 03/14/2023   06:46:00  (  70.15,  75.00)    5.46                71
 03/14/2023   07:35:30   ( -70.04,-117.55) 03/14/2023   07:35:30  ( -70.05,-117.52)    1.77                 0
 03/14/2023   08:26:11   (  69.77,  50.15) 03/14/2023   08:24:59  (  69.82,  49.81)   14.11                72
 03/16/2023   23:01:41   (  70.11,-169.21) 03/16/2023   23:02:24  (  70.09,-169.18)    2.37                43
 03/16/2023   23:52:23   ( -70.01,  -1.74) 03/16/2023   23:51:54  ( -69.99,  -1.70)    3.00                29