Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 21.  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)
 06/22/2023   07:09:14   (  70.04,  68.81) 06/22/2023   07:10:13  (  70.06,  68.75)    3.30                59
 06/22/2023   07:59:56   ( -69.95,-123.74) 06/22/2023   07:59:43  ( -69.95,-123.78)    1.70                13
 06/22/2023   08:50:29   (  69.25,  44.59) 06/22/2023   08:49:20  (  69.29,  42.98)   63.70                69
 06/24/2023   23:26:08   (  70.03,-175.41) 06/24/2023   23:26:42  (  70.03,-175.41)    0.36                34
 06/25/2023   00:16:50   ( -69.94,  -7.95) 06/25/2023   00:16:12  ( -69.92,  -7.93)    2.70                38
 06/27/2023   14:52:27   ( -70.61, 132.15) 06/27/2023   14:53:36  ( -70.52, 133.54)   52.57                69
 06/27/2023   15:43:01   (  69.98, -59.55) 06/27/2023   15:43:11  (  69.97, -59.60)    1.91                10
 06/27/2023   16:33:43   ( -69.88, 107.91) 06/27/2023   16:32:41  ( -69.86, 107.88)    2.49                62
 06/30/2023   07:09:10   ( -70.03,-111.17) 06/30/2023   07:10:12  ( -70.06,-111.23)    3.31                62
 06/30/2023   07:59:54   (  69.93,  56.29) 06/30/2023   07:59:39  (  69.95,  56.26)    2.12                15
 06/30/2023   08:50:27   ( -69.35,-135.55) 06/30/2023   08:49:17  ( -69.40,-136.86)   51.62                70
 07/02/2023   23:26:02   ( -69.99,   4.67) 07/02/2023   23:26:39  ( -70.01,   4.59)    3.49                37
 07/03/2023   00:16:46   (  69.89, 172.13) 07/03/2023   00:16:06  (  69.89, 172.08)    1.88                40