Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 1.  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)
 09/02/2023   07:59:19   (  70.02,  56.23) 09/02/2023   08:00:13  (  70.00,  56.28)    2.97                54
 09/02/2023   08:50:00   ( -69.89,-136.25) 09/02/2023   08:49:43  ( -69.89,-136.24)    0.36                17
 09/02/2023   09:40:30   (  69.01,  32.31) 09/02/2023   09:39:23  (  69.06,  30.30)   80.34                67
 09/05/2023   00:16:13   (  69.95, 172.11) 09/05/2023   00:16:41  (  69.95, 172.10)    0.45                28
 09/05/2023   01:06:55   ( -69.86, -20.45) 09/05/2023   01:06:11  ( -69.84, -20.42)    3.18                44
 09/07/2023   15:42:28   ( -70.21, 120.15) 09/07/2023   15:43:40  ( -70.15, 120.62)   19.08                72
 09/07/2023   16:33:09   (  69.93, -72.11) 09/07/2023   16:33:09  (  69.93, -72.04)    2.66                 0
 09/07/2023   17:23:50   ( -69.80,  95.41) 09/07/2023   17:22:39  ( -69.82,  95.44)    3.17                71
 09/10/2023   07:59:20   ( -69.99,-123.74) 09/10/2023   08:00:10  ( -70.00,-123.70)    2.03                50
 09/10/2023   08:50:04   (  69.87,  43.74) 09/10/2023   08:49:37  (  69.89,  43.79)    2.63                27
 09/10/2023   09:40:29   ( -68.88,-147.53) 09/10/2023   09:39:22  ( -68.96,-149.82)   92.03                67
 09/12/2023   23:25:49   (  70.87,-176.69) 09/12/2023   23:26:55  (  70.76,-174.33)   87.08                66
 09/13/2023   00:16:15   ( -69.94,  -7.90) 09/13/2023   00:16:38  ( -69.94,  -7.89)    0.33                23
 09/13/2023   01:06:59   (  69.82, 159.59) 09/13/2023   01:06:05  (  69.82, 159.59)    0.67                54