Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 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)
 11/18/2023   15:43:00   (  69.96, -59.68) 11/18/2023   15:43:59  (  69.97, -59.69)    0.51                59
 11/18/2023   16:33:42   ( -69.87, 107.78) 11/18/2023   16:33:29  ( -69.86, 107.79)    1.23                13
 11/18/2023   17:24:15   (  69.17, -83.90) 11/18/2023   17:23:06  (  69.20, -85.45)   61.25                69
 11/21/2023   07:59:56   (  69.92,  56.14) 11/21/2023   08:00:29  (  69.92,  56.12)    0.96                33
 11/21/2023   08:50:38   ( -69.82,-136.39) 11/21/2023   08:49:59  ( -69.81,-136.40)    1.33                39
 11/23/2023   23:26:16   ( -70.36,   3.92) 11/23/2023   23:27:27  ( -70.28,   4.87)   36.61                71
 11/24/2023   00:16:53   (  69.89, 171.95) 11/24/2023   00:16:59  (  69.90, 171.97)    1.55                 6
 11/24/2023   01:07:35   ( -69.78, -20.57) 11/24/2023   01:06:29  ( -69.79, -20.55)    1.59                66
 11/26/2023   15:43:06   ( -69.96, 120.29) 11/26/2023   15:44:02  ( -69.97, 120.30)    0.67                56
 11/26/2023   16:33:50   (  69.86, -72.25) 11/26/2023   16:33:29  (  69.86, -72.21)    1.40                21
 11/26/2023   17:24:19   ( -69.07,  96.22) 11/26/2023   17:23:10  ( -69.15,  94.47)   69.89                69
 11/29/2023   08:00:02   ( -69.89,-123.84) 11/29/2023   08:00:32  ( -69.91,-123.91)    3.19                30
 11/29/2023   08:50:46   (  69.79,  43.62) 11/29/2023   08:49:59  (  69.79,  43.58)    1.65                47