Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 10 3.  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)
 10/04/2023   07:59:20   (  70.01,  56.19) 10/04/2023   08:00:20  (  70.00,  56.26)    3.21                60
 10/04/2023   08:50:01   ( -69.88,-136.29) 10/04/2023   08:49:50  ( -69.88,-136.26)    0.97                11
 10/04/2023   09:40:35   (  69.22,  31.97) 10/04/2023   09:39:26  (  69.28,  30.57)   55.68                69
 10/07/2023   00:16:13   (  69.97, 172.04) 10/07/2023   00:16:49  (  69.94, 172.06)    3.32                36
 10/07/2023   01:06:54   ( -69.83, -20.43) 10/07/2023   01:06:19  ( -69.83, -20.46)    0.87                35
 10/09/2023   15:42:32   ( -70.57, 119.57) 10/09/2023   15:43:41  ( -70.49, 121.11)   57.97                69
 10/09/2023   16:33:05   (  69.88, -72.05) 10/09/2023   16:33:17  (  69.89, -72.11)    2.68                12
 10/09/2023   17:23:47   ( -69.79,  95.40) 10/09/2023   17:22:47  ( -69.78,  95.37)    1.02                60
 10/12/2023   07:59:14   ( -69.97,-123.72) 10/12/2023   08:00:17  ( -69.98,-123.74)    1.63                63
 10/12/2023   08:49:58   (  69.86,  43.76) 10/12/2023   08:49:44  (  69.86,  43.75)    1.04                14
 10/12/2023   09:40:32   ( -69.34,-148.17) 10/12/2023   09:39:21  ( -69.37,-149.29)   43.91                71
 10/15/2023   00:16:06   ( -69.95,  -7.92) 10/15/2023   00:16:42  ( -69.97,  -7.86)    2.97                36
 10/15/2023   01:06:49   (  69.79, 159.63) 10/15/2023   01:06:10  (  69.80, 159.55)    3.01                39