Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 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)
 02/04/2023   23:01:51   ( -70.14,  10.81) 02/04/2023   23:03:01  ( -70.17,  10.84)    2.99                70
 02/04/2023   23:52:35   (  70.03, 178.30) 02/04/2023   23:52:29  (  70.01, 178.26)    1.82                 6
 02/05/2023   00:43:13   ( -69.73, -13.94) 02/05/2023   00:42:01  ( -69.79, -14.41)   19.41                72
 02/07/2023   15:18:42   ( -70.11, 126.64) 02/07/2023   15:19:31  ( -70.11, 126.63)    0.43                49
 02/07/2023   16:09:26   (  70.00, -65.88) 02/07/2023   16:08:58  (  70.01, -65.87)    1.10                28
 02/10/2023   07:35:34   ( -70.08,-117.55) 02/10/2023   07:36:01  ( -70.08,-117.54)    0.57                27
 02/10/2023   08:26:18   (  69.97,  49.93) 02/10/2023   08:25:28  (  69.97,  49.95)    1.03                50
 02/12/2023   23:01:47   (  70.32,-169.45) 02/12/2023   23:02:59  (  70.24,-169.06)   16.88                72
 02/12/2023   23:52:25   ( -70.01,  -1.66) 02/12/2023   23:52:31  ( -70.03,  -1.74)    3.22                 6
 02/13/2023   00:43:09   (  69.90, 165.81) 02/13/2023   00:41:58  (  69.91, 165.75)    2.40                71
 02/15/2023   15:18:35   (  70.10, -53.34) 02/15/2023   15:19:30  (  70.10, -53.38)    1.83                55
 02/15/2023   16:09:17   ( -70.00, 114.13) 02/15/2023   16:09:00  ( -70.00, 114.11)    0.90                17
 02/15/2023   16:59:47   (  69.15, -77.33) 02/15/2023   16:58:39  (  69.22, -79.30)   78.34                68