Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 15.  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)
 01/15/2023   22:36:50   ( -70.50,  16.60) 01/15/2023   22:38:01  ( -70.44,  17.46)   32.83                71
 01/15/2023   23:27:28   (  70.07,-175.42) 01/15/2023   23:27:33  (  70.06,-175.44)    1.09                 5
 01/16/2023   00:18:09   ( -69.93,  -7.89) 01/16/2023   00:17:03  ( -69.95,  -7.97)    3.49                66
 01/18/2023   14:53:36   ( -70.13, 132.94) 01/18/2023   14:54:31  ( -70.16, 132.94)    3.35                55
 01/18/2023   15:44:20   (  70.02, -59.57) 01/18/2023   15:43:59  (  70.00, -59.64)    3.38                21
 01/18/2023   16:34:49   ( -69.24, 108.88) 01/18/2023   16:33:40  ( -69.28, 107.02)   73.40                69
 01/21/2023   07:10:29   ( -70.09,-111.22) 01/21/2023   07:10:57  ( -70.12,-111.22)    3.53                28
 01/21/2023   08:01:13   (  69.98,  56.26) 01/21/2023   08:00:24  (  70.01,  56.26)    3.43                49
 01/23/2023   22:36:41   (  70.20,-162.95) 01/23/2023   22:37:52  (  70.20,-162.84)    3.90                71
 01/23/2023   23:27:22   ( -70.06,   4.60) 01/23/2023   23:27:23  ( -70.04,   4.56)    2.19                 1
 01/24/2023   00:18:04   (  69.84, 172.23) 01/24/2023   00:16:51  (  69.87, 171.97)   10.57                73
 01/26/2023   14:53:33   (  70.13, -47.07) 01/26/2023   14:54:17  (  70.14, -47.03)    1.49                44
 01/26/2023   15:44:15   ( -70.03, 120.40) 01/26/2023   15:43:47  ( -70.04, 120.45)    1.91                28