Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 13.  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)
 11/13/2023   07:59:48   ( -69.96,-123.88) 11/13/2023   08:00:26  ( -69.96,-123.81)    2.54                38
 11/13/2023   08:50:31   (  69.79,  43.68) 11/13/2023   08:49:54  (  69.80,  43.62)    2.74                37
 11/15/2023   23:26:11   (  70.47,-176.23) 11/15/2023   23:27:21  (  70.34,-175.02)   47.29                70
 11/16/2023   00:16:44   ( -69.90,  -8.03) 11/16/2023   00:16:57  ( -69.90,  -8.02)    0.68                13
 11/16/2023   01:07:28   (  69.79, 159.45) 11/16/2023   01:06:24  (  69.80, 159.49)    2.10                64
 11/18/2023   15:43:00   (  70.00, -59.74) 11/18/2023   15:43:58  (  69.98, -59.67)    3.52                58
 11/18/2023   16:33:41   ( -69.85, 107.81) 11/18/2023   16:33:28  ( -69.87, 107.82)    3.01                13
 11/18/2023   17:24:14   (  69.15, -83.88) 11/18/2023   17:23:05  (  69.21, -85.43)   61.65                69
 11/21/2023   07:59:56   (  69.91,  56.16) 11/21/2023   08:00:29  (  69.92,  56.12)    1.72                33
 11/21/2023   08:50:38   ( -69.81,-136.37) 11/21/2023   08:49:59  ( -69.81,-136.39)    1.28                39
 11/23/2023   23:26:16   ( -70.35,   3.93) 11/23/2023   23:27:27  ( -70.26,   4.85)   35.60                71
 11/24/2023   00:16:53   (  69.88, 171.96) 11/24/2023   00:16:59  (  69.88, 171.94)    0.84                 6
 11/24/2023   01:07:35   ( -69.77, -20.56) 11/24/2023   01:06:29  ( -69.78, -20.56)    0.23                66
 11/26/2023   15:43:05   ( -69.96, 120.29) 11/26/2023   15:44:00  ( -69.98, 120.32)    2.01                55
 11/26/2023   16:33:49   (  69.86, -72.25) 11/26/2023   16:33:27  (  69.86, -72.20)    2.02                22