Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 12 17.  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)
 12/17/2023   23:26:21   (  70.01,-175.59) 12/17/2023   23:27:28  (  70.02,-175.51)    3.03                67
 12/18/2023   00:17:02   ( -69.87,  -8.05) 12/18/2023   00:16:59  ( -69.85,  -8.11)    2.61                 3
 12/18/2023   01:07:41   (  69.48, 159.81) 12/18/2023   01:06:29  (  69.58, 159.16)   27.51                72
 12/20/2023   15:43:16   (  69.98, -59.77) 12/20/2023   15:43:59  (  69.96, -59.72)    3.14                43
 12/20/2023   16:33:57   ( -69.83, 107.76) 12/20/2023   16:33:29  ( -69.85, 107.77)    1.97                28
 12/23/2023   07:09:41   ( -70.85,-112.70) 12/23/2023   07:10:48  ( -70.75,-110.32)   87.59                67
 12/23/2023   08:00:09   (  69.90,  56.11) 12/23/2023   08:00:28  (  69.93,  56.12)    3.18                19
 12/23/2023   08:50:51   ( -69.81,-136.43) 12/23/2023   08:49:58  ( -69.83,-136.39)    2.68                53
 12/25/2023   23:26:20   ( -70.00,   4.43) 12/25/2023   23:27:31  ( -70.00,   4.45)    0.85                71
 12/26/2023   00:17:04   (  69.89, 171.90) 12/26/2023   00:16:58  (  69.89, 171.94)    1.37                 6
 12/26/2023   01:07:43   ( -69.64, -20.40) 12/26/2023   01:06:30  ( -69.68, -20.72)   13.07                73
 12/28/2023   15:43:14   ( -69.94, 120.29) 12/28/2023   15:44:01  ( -69.94, 120.24)    2.05                47
 12/28/2023   16:33:58   (  69.83, -72.24) 12/28/2023   16:33:28  (  69.82, -72.28)    2.24                30