Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 2.  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)
 01/03/2023   23:02:08   ( -70.14,  10.85) 01/03/2023   23:02:59  ( -70.12,  10.81)    2.91                51
 01/03/2023   23:52:52   (  70.02, 178.33) 01/03/2023   23:52:26  (  70.01, 178.31)    1.65                26
 01/04/2023   00:43:17   ( -69.03, -12.92) 01/04/2023   00:42:11  ( -69.08, -15.32)   95.34                66
 01/06/2023   14:28:38   (  71.13, -42.30) 01/06/2023   14:29:43  (  71.04, -39.55)   99.59                65
 01/06/2023   15:19:02   ( -70.09, 126.69) 01/06/2023   15:19:28  ( -70.12, 126.69)    3.02                26
 01/06/2023   16:09:46   (  69.98, -65.83) 01/06/2023   16:08:56  (  69.95, -65.89)    3.46                50
 01/09/2023   06:45:16   (  70.25,  74.89) 01/09/2023   06:46:27  (  70.20,  75.06)    8.24                71
 01/09/2023   07:35:56   ( -70.05,-117.49) 01/09/2023   07:35:58  ( -70.04,-117.53)    2.05                 2
 01/09/2023   08:26:38   (  69.83,  50.15) 01/09/2023   08:25:26  (  69.87,  49.87)   11.59                72
 01/11/2023   23:02:08   (  70.16,-169.21) 01/11/2023   23:02:55  (  70.15,-169.13)    3.28                47
 01/11/2023   23:52:49   ( -70.01,  -1.67) 01/11/2023   23:52:26  ( -69.99,  -1.72)    2.79                23
 01/14/2023   15:19:01   (  70.08, -53.32) 01/14/2023   15:19:24  (  70.08, -53.35)    1.05                23
 01/14/2023   16:09:43   ( -69.98, 114.14) 01/14/2023   16:08:54  ( -69.98, 114.15)    0.45                49