Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 7 24.  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)
 07/26/2023   23:25:49   (  70.26,-175.69) 07/26/2023   23:27:00  (  70.18,-175.22)   19.88                71
 07/27/2023   00:16:27   ( -69.95,  -7.91) 07/27/2023   00:16:32  ( -69.96,  -7.90)    1.00                 5
 07/27/2023   01:07:11   (  69.84, 159.56) 07/27/2023   01:05:59  (  69.86, 159.60)    2.09                72
 07/29/2023   15:42:37   (  70.03, -59.56) 07/29/2023   15:43:34  (  70.01, -59.58)    2.18                57
 07/29/2023   16:33:19   ( -69.93, 107.90) 07/29/2023   16:33:04  ( -69.91, 107.90)    2.97                15
 07/29/2023   17:23:50   (  69.13, -83.64) 07/29/2023   17:22:42  (  69.19, -85.42)   70.95                68
 08/01/2023   07:59:27   (  69.96,  56.32) 08/01/2023   08:00:04  (  69.98,  56.25)    3.07                37
 08/01/2023   08:50:09   ( -69.87,-136.22) 08/01/2023   08:49:34  ( -69.88,-136.26)    2.12                35
 08/03/2023   23:25:49   ( -70.80,   3.48) 08/03/2023   23:26:56  ( -70.70,   5.54)   76.41                67
 08/04/2023   00:16:19   (  69.96, 172.10) 08/04/2023   00:16:34  (  69.98, 172.14)    3.04                15
 08/04/2023   01:07:01   ( -69.86, -20.43) 08/04/2023   01:06:05  ( -69.83, -20.44)    3.24                56
 08/06/2023   15:42:26   ( -70.01, 120.50) 08/06/2023   15:43:38  ( -70.03, 120.43)    3.01                72
 08/06/2023   16:33:10   (  69.91, -72.05) 08/06/2023   16:33:05  (  69.91, -72.09)    1.58                 5
 08/06/2023   17:23:50   ( -69.70,  95.58) 08/06/2023   17:22:36  ( -69.76,  95.34)   11.17                74