Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 28.  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)
 03/30/2023   06:44:40   (  70.60,  74.27) 03/30/2023   06:45:50  (  70.50,  75.48)   45.96                70
 03/30/2023   07:35:13   ( -70.04,-117.53) 03/30/2023   07:35:26  ( -70.05,-117.53)    1.68                13
 03/30/2023   08:25:57   (  69.93,  49.95) 03/30/2023   08:24:53  (  69.95,  49.96)    2.35                64
 04/01/2023   23:01:22   (  70.10,-169.16) 04/01/2023   23:02:21  (  70.11,-169.20)    1.79                59
 04/01/2023   23:52:04   ( -70.01,  -1.70) 04/01/2023   23:51:51  ( -70.00,  -1.72)    1.64                13
 04/02/2023   00:42:37   (  69.31, 166.62) 04/02/2023   00:41:28  (  69.33, 165.02)   63.01                69
 04/04/2023   15:18:13   (  70.09, -53.35) 04/04/2023   15:18:45  (  70.06, -53.37)    3.19                32
 04/04/2023   16:08:53   ( -69.94, 114.19) 04/04/2023   16:08:14  ( -69.95, 114.11)    3.08                39
 04/07/2023   06:44:25   ( -70.50,-105.53) 04/07/2023   06:45:36  ( -70.35,-104.69)   35.61                71
 04/07/2023   07:35:02   (  70.03,  62.51) 04/07/2023   07:35:07  (  70.01,  62.47)    2.37                 5
 04/07/2023   08:25:44   ( -69.94,-130.03) 04/07/2023   08:24:37  ( -69.91,-130.05)    3.47                67
 04/09/2023   23:01:08   ( -70.09,  10.89) 04/09/2023   23:02:02  ( -70.10,  10.85)    1.59                54
 04/09/2023   23:51:52   (  69.99, 178.35) 04/09/2023   23:51:29  (  69.98, 178.33)    1.39                23