Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 6.  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)
 02/07/2023   15:18:42   ( -70.11, 126.64) 02/07/2023   15:19:31  ( -70.11, 126.63)    0.71                49
 02/07/2023   16:09:26   (  69.99, -65.88) 02/07/2023   16:08:58  (  70.01, -65.87)    2.32                28
 02/10/2023   06:45:10   (  71.12,  73.47) 02/10/2023   06:46:16  (  71.01,  76.22)   99.84                66
 02/10/2023   07:35:34   ( -70.08,-117.54) 02/10/2023   07:36:01  ( -70.08,-117.54)    0.36                27
 02/10/2023   08:26:18   (  69.97,  49.94) 02/10/2023   08:25:28  (  69.98,  49.96)    1.54                50
 02/12/2023   23:01:47   (  70.31,-169.44) 02/12/2023   23:02:59  (  70.25,-169.06)   16.21                72
 02/12/2023   23:52:26   ( -70.06,  -1.74) 02/12/2023   23:52:31  ( -70.03,  -1.74)    3.66                 5
 02/13/2023   00:43:09   (  69.90, 165.81) 02/13/2023   00:41:58  (  69.92, 165.76)    3.25                71
 02/15/2023   15:18:35   (  70.09, -53.33) 02/15/2023   15:19:30  (  70.11, -53.37)    2.70                55
 02/15/2023   16:09:17   ( -70.00, 114.14) 02/15/2023   16:09:00  ( -70.00, 114.11)    1.32                17
 02/15/2023   16:59:47   (  69.14, -77.32) 02/15/2023   16:58:39  (  69.23, -79.30)   78.62                68
 02/18/2023   07:35:26   (  70.09,  62.45) 02/18/2023   07:35:57  (  70.11,  62.51)    3.42                31
 02/18/2023   08:26:07   ( -69.94,-130.00) 02/18/2023   08:25:28  ( -69.96,-130.08)    3.48                39