Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 25.  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)
 01/26/2023   14:53:33   (  70.17, -47.12) 01/26/2023   14:54:37  (  70.18, -47.07)    2.12                64
 01/26/2023   15:44:15   ( -70.08, 120.33) 01/26/2023   15:44:07  ( -70.07, 120.40)    3.05                 8
 01/26/2023   16:34:51   (  69.54, -71.56) 01/26/2023   16:33:40  (  69.63, -72.56)   40.11                71
 01/29/2023   07:10:25   (  70.11,  68.73) 01/29/2023   07:11:08  (  70.09,  68.68)    2.92                43
 01/29/2023   08:01:07   ( -70.02,-123.81) 01/29/2023   08:00:37  ( -70.04,-123.76)    3.00                30
 01/31/2023   22:36:50   ( -71.07,  15.65) 01/31/2023   22:37:56  ( -70.96,  18.20)   92.95                66
 01/31/2023   23:27:17   (  70.07,-175.43) 01/31/2023   23:27:37  (  70.09,-175.46)    1.48                20
 02/01/2023   00:17:59   ( -69.98,  -7.98) 02/01/2023   00:17:07  ( -69.98,  -7.97)    0.25                52
 02/03/2023   14:53:26   ( -70.26, 132.75) 02/03/2023   14:54:37  ( -70.21, 132.95)    9.55                71
 02/03/2023   15:44:08   (  70.05, -59.62) 02/03/2023   15:44:05  (  70.04, -59.64)    1.35                 3
 02/03/2023   16:34:49   ( -69.90, 107.92) 02/03/2023   16:33:35  ( -69.94, 107.85)    5.06                74
 02/06/2023   07:10:16   ( -70.14,-111.29) 02/06/2023   07:11:06  ( -70.13,-111.28)    0.99                50
 02/06/2023   08:01:00   (  70.03,  56.18) 02/06/2023   08:00:33  (  70.01,  56.20)    2.56                27