Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 20.  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   07:09:15   (  70.09,  68.73) 06/22/2023   07:10:13  (  70.06,  68.75)    3.21                58
 06/22/2023   07:59:56   ( -69.95,-123.73) 06/22/2023   07:59:43  ( -69.95,-123.77)    1.50                13
 06/22/2023   08:50:29   (  69.25,  44.59) 06/22/2023   08:49:20  (  69.29,  42.98)   63.68                69
 06/24/2023   23:26:08   (  70.03,-175.40) 06/24/2023   23:26:42  (  70.03,-175.41)    0.14                34
 06/25/2023   00:16:50   ( -69.94,  -7.95) 06/25/2023   00:16:12  ( -69.92,  -7.93)    2.24                38
 06/27/2023   14:52:27   ( -70.61, 132.15) 06/27/2023   14:53:37  ( -70.46, 133.46)   51.19                70
 06/27/2023   15:43:01   (  69.98, -59.55) 06/27/2023   15:43:11  (  69.97, -59.60)    2.01                10
 06/27/2023   16:33:43   ( -69.88, 107.91) 06/27/2023   16:32:41  ( -69.86, 107.88)    2.36                62
 06/30/2023   07:09:10   ( -70.03,-111.17) 06/30/2023   07:10:12  ( -70.05,-111.24)    3.34                62
 06/30/2023   07:59:54   (  69.93,  56.29) 06/30/2023   07:59:39  (  69.94,  56.25)    2.00                15
 06/30/2023   08:50:27   ( -69.35,-135.55) 06/30/2023   08:49:17  ( -69.39,-136.86)   51.84                70
 07/02/2023   23:26:03   ( -70.04,   4.59) 07/02/2023   23:26:38  ( -70.06,   4.66)    3.08                35
 07/03/2023   00:16:46   (  69.89, 172.13) 07/03/2023   00:16:06  (  69.89, 172.07)    2.30                40