Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 5.  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)
 11/05/2023   07:59:39   (  69.95,  56.18) 11/05/2023   08:00:26  (  69.95,  56.18)    0.30                47
 11/05/2023   08:50:21   ( -69.85,-136.36) 11/05/2023   08:49:56  ( -69.83,-136.35)    2.17                25
 11/07/2023   23:26:06   ( -70.74,   3.38) 11/07/2023   23:27:14  ( -70.66,   5.45)   76.96                68
 11/08/2023   00:16:36   (  69.90, 172.01) 11/08/2023   00:16:53  (  69.89, 171.99)    1.02                17
 11/08/2023   01:07:18   ( -69.80, -20.52) 11/08/2023   01:06:23  ( -69.78, -20.53)    1.82                55
 11/10/2023   15:42:50   ( -69.97, 120.35) 11/10/2023   15:43:53  ( -69.96, 120.33)    1.11                63
 11/10/2023   16:33:34   (  69.86, -72.17) 11/10/2023   16:33:20  (  69.85, -72.18)    1.04                14
 11/10/2023   17:24:08   ( -69.34,  95.91) 11/10/2023   17:22:57  ( -69.36,  94.78)   44.08                71
 11/13/2023   07:59:48   ( -69.94,-123.85) 11/13/2023   08:00:19  ( -69.93,-123.82)    1.52                31
 11/13/2023   08:50:32   (  69.83,  43.62) 11/13/2023   08:49:46  (  69.82,  43.67)    2.71                46
 11/15/2023   23:26:03   (  69.98,-175.47) 11/15/2023   23:27:15  (  69.96,-175.51)    2.54                72
 11/16/2023   00:16:45   ( -69.87,  -7.99) 11/16/2023   00:16:45  ( -69.86,  -8.02)    2.03                 0
 11/16/2023   01:07:26   (  69.61, 159.71) 11/16/2023   01:06:13  (  69.68, 159.39)   15.00                73
 11/18/2023   15:42:59   (  69.93, -59.63) 11/18/2023   15:43:38  (  69.95, -59.62)    2.71                39
 11/18/2023   16:33:41   ( -69.82, 107.86) 11/18/2023   16:33:09  ( -69.79, 107.79)    3.54                32