Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 23.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 06/24/2023   23:26:08   (  70.02,-175.39) 06/24/2023   23:26:42  (  70.04,-175.40)    1.36                34
 06/25/2023   00:16:50   ( -69.93,  -7.94) 06/25/2023   00:16:12  ( -69.92,  -7.93)    1.61                38
 06/27/2023   14:52:27   ( -70.61, 132.15) 06/27/2023   14:53:36  ( -70.51, 133.54)   52.50                69
 06/27/2023   15:43:01   (  69.98, -59.55) 06/27/2023   15:43:11  (  69.97, -59.60)    1.99                10
 06/27/2023   16:33:43   ( -69.88, 107.91) 06/27/2023   16:32:41  ( -69.86, 107.88)    2.79                62
 06/30/2023   07:09:09   ( -70.04,-111.18) 06/30/2023   07:10:11  ( -70.04,-111.25)    2.51                62
 06/30/2023   07:59:53   (  69.94,  56.29) 06/30/2023   07:59:38  (  69.94,  56.24)    1.61                15
 06/30/2023   08:50:26   ( -69.36,-135.56) 06/30/2023   08:49:16  ( -69.39,-136.87)   51.64                70
 07/02/2023   23:26:03   ( -70.06,   4.56) 07/02/2023   23:26:38  ( -70.04,   4.64)    3.62                35
 07/03/2023   00:16:46   (  69.90, 172.11) 07/03/2023   00:16:05  (  69.93, 172.13)    2.79                41
 07/05/2023   14:52:20   (  70.46, -47.60) 07/05/2023   14:53:31  (  70.33, -46.67)   36.96                71
 07/05/2023   15:42:55   ( -69.98, 120.46) 07/05/2023   15:43:06  ( -69.96, 120.42)    3.30                11
 07/05/2023   16:33:39   (  69.88, -72.09) 07/05/2023   16:32:32  (  69.90, -72.02)    2.81                67