Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 12 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)
 12/25/2023   23:26:20   ( -70.01,   4.42) 12/25/2023   23:27:29  ( -70.02,   4.49)    2.85                69
 12/26/2023   00:17:03   (  69.84, 171.98) 12/26/2023   00:16:57  (  69.86, 171.90)    3.66                 6
 12/26/2023   01:07:42   ( -69.59, -20.34) 12/26/2023   01:06:29  ( -69.64, -20.76)   17.36                73
 12/28/2023   15:43:14   ( -69.97, 120.26) 12/28/2023   15:43:58  ( -69.94, 120.26)    2.88                44
 12/28/2023   16:33:58   (  69.85, -72.26) 12/28/2023   16:33:25  (  69.83, -72.25)    2.46                33
 12/31/2023   07:09:37   (  70.66,  67.63) 12/31/2023   07:10:45  (  70.53,  69.36)   65.64                68
 12/31/2023   08:00:07   ( -69.93,-123.92) 12/31/2023   08:00:24  ( -69.93,-123.87)    1.99                17
 12/31/2023   08:50:51   (  69.82,  43.56) 12/31/2023   08:49:51  (  69.82,  43.62)    2.30                60
 01/02/2024   23:26:19   (  70.01,-175.57) 01/02/2024   23:27:21  (  69.98,-175.54)    3.04                62
 01/03/2024   00:17:00   ( -69.86,  -8.03) 01/03/2024   00:16:51  ( -69.88,  -8.05)    2.16                 9
 01/03/2024   01:07:36   (  69.32, 160.06) 01/03/2024   01:06:25  (  69.38, 158.91)   45.27                71
 01/05/2024   15:43:12   (  69.95, -59.70) 01/05/2024   15:43:47  (  69.95, -59.69)    0.46                35
 01/05/2024   16:33:54   ( -69.85, 107.76) 01/05/2024   16:33:17  ( -69.85, 107.80)    1.87                37