Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 20.  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)
 11/21/2023   07:59:56   (  69.91,  56.16) 11/21/2023   08:00:29  (  69.94,  56.14)    3.20                33
 11/21/2023   08:50:38   ( -69.81,-136.38) 11/21/2023   08:49:59  ( -69.82,-136.38)    1.37                39
 11/23/2023   23:26:17   ( -70.40,   3.85) 11/23/2023   23:27:27  ( -70.31,   4.90)   40.47                70
 11/24/2023   00:16:53   (  69.87, 171.98) 11/24/2023   00:17:00  (  69.87, 171.93)    1.86                 7
 11/24/2023   01:07:35   ( -69.77, -20.56) 11/24/2023   01:06:30  ( -69.76, -20.59)    1.45                65
 11/26/2023   15:43:06   ( -69.95, 120.32) 11/26/2023   15:44:03  ( -69.96, 120.28)    1.88                57
 11/26/2023   16:33:50   (  69.84, -72.22) 11/26/2023   16:33:30  (  69.85, -72.23)    1.01                20
 11/26/2023   17:24:20   ( -69.10,  96.17) 11/26/2023   17:23:11  ( -69.13,  94.45)   68.17                69
 11/29/2023   08:00:02   ( -69.92,-123.88) 11/29/2023   08:00:32  ( -69.92,-123.90)    0.81                30
 11/29/2023   08:50:46   (  69.82,  43.58) 11/29/2023   08:49:59  (  69.80,  43.59)    1.46                47
 12/01/2023   23:26:19   (  70.12,-175.73) 12/01/2023   23:27:30  (  70.07,-175.44)   12.47                71
 12/02/2023   00:16:59   ( -69.90,  -8.09) 12/02/2023   00:17:01  ( -69.91,  -8.02)    2.84                 2
 12/02/2023   01:07:42   (  69.75, 159.45) 12/02/2023   01:06:29  (  69.74, 159.39)    2.35                73