Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 4.  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   ( -70.54,-105.65) 03/06/2023   06:46:10  ( -70.41,-104.67)   39.37                71
 03/06/2023   07:35:35   (  70.01,  62.49) 03/06/2023   07:35:42  (  70.03,  62.43)    3.35                 7
 03/06/2023   08:26:17   ( -69.92,-130.06) 03/06/2023   08:25:12  ( -69.92,-130.09)    1.34                65
 03/08/2023   23:01:44   ( -70.11,  10.80) 03/08/2023   23:02:40  ( -70.13,  10.81)    2.73                56
 03/08/2023   23:52:28   (  70.00, 178.27) 03/08/2023   23:52:07  (  70.02, 178.30)    2.90                21
 03/09/2023   00:42:57   ( -69.22, -13.27) 03/09/2023   00:41:49  ( -69.25, -15.11)   72.63                68
 03/11/2023   15:18:37   ( -70.05, 126.65) 03/11/2023   15:19:06  ( -70.07, 126.62)    2.38                29
 03/11/2023   16:09:21   (  69.95, -65.88) 03/11/2023   16:08:33  (  69.96, -65.89)    1.46                48
 03/14/2023   06:44:49   (  70.16,  74.94) 03/14/2023   06:46:00  (  70.17,  75.03)    3.84                71
 03/14/2023   07:35:30   ( -70.01,-117.51) 03/14/2023   07:35:31  ( -70.01,-117.56)    1.87                 1
 03/14/2023   08:26:12   (  69.80,  50.11) 03/14/2023   08:24:59  (  69.84,  49.84)   11.23                73
 03/16/2023   23:01:41   (  70.08,-169.17) 03/16/2023   23:02:25  (  70.06,-169.23)    3.30                44
 03/16/2023   23:52:23   ( -69.98,  -1.70) 03/16/2023   23:51:55  ( -69.96,  -1.74)    3.16                28