Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 13.  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)
 04/14/2024   15:18:18   ( -70.03, 126.50) 04/14/2024   15:18:56  ( -70.02, 126.49)    1.74                38
 04/14/2024   16:09:02   (  69.93, -66.02) 04/14/2024   16:08:23  (  69.91, -66.02)    1.66                39
 04/17/2024   06:44:38   (  70.46,  74.30) 04/17/2024   06:45:48  (  70.36,  75.23)   35.97                70
 04/17/2024   07:35:13   ( -69.99,-117.65) 04/17/2024   07:35:23  ( -69.98,-117.69)    1.87                10
 04/17/2024   08:25:57   (  69.88,  49.82) 04/17/2024   08:24:50  (  69.86,  49.80)    1.93                67
 04/19/2024   23:01:26   (  70.05,-169.28) 04/19/2024   23:02:19  (  70.06,-169.31)    2.03                53
 04/19/2024   23:52:08   ( -69.94,  -1.81) 04/19/2024   23:51:49  ( -69.96,  -1.83)    1.68                19
 04/20/2024   00:42:37   (  69.04, 166.80) 04/20/2024   00:41:30  (  69.07, 164.62)   86.64                67
 04/22/2024   15:18:21   (  70.02, -53.46) 04/22/2024   15:18:45  (  70.01, -53.49)    1.24                24
 04/22/2024   16:09:03   ( -69.91, 114.01) 04/22/2024   16:08:15  ( -69.91, 114.00)    0.72                48
 04/25/2024   06:44:31   ( -70.09,-105.11) 04/25/2024   06:45:42  ( -70.11,-105.11)    1.84                71
 04/25/2024   07:35:15   (  69.99,  62.35) 04/25/2024   07:35:09  (  69.99,  62.36)    0.88                 6
 04/25/2024   08:25:54   ( -69.73,-129.94) 04/25/2024   08:24:41  ( -69.78,-130.30)   14.87                73