Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 23.  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)
 08/25/2023   07:59:13   ( -70.01,-123.72) 08/25/2023   08:00:15  ( -69.99,-123.75)    2.24                62
 08/25/2023   08:49:57   (  69.88,  43.78) 08/25/2023   08:49:42  (  69.89,  43.75)    1.03                15
 08/25/2023   09:40:30   ( -69.32,-148.09) 08/25/2023   09:39:19  ( -69.39,-149.29)   47.76                71
 08/28/2023   00:16:08   ( -69.96,  -7.89) 08/28/2023   00:16:44  ( -69.95,  -7.92)    1.83                36
 08/28/2023   01:06:52   (  69.84, 159.60) 08/28/2023   01:06:11  (  69.84, 159.58)    0.99                41
 08/30/2023   15:42:29   (  70.39, -60.10) 08/30/2023   15:43:39  (  70.27, -59.22)   35.52                70
 08/30/2023   16:33:04   ( -69.93, 107.93) 08/30/2023   16:33:13  ( -69.94, 107.95)    1.76                 9
 08/30/2023   17:23:48   (  69.81, -84.59) 08/30/2023   17:22:40  (  69.83, -84.56)    2.68                68
 09/02/2023   07:59:18   (  69.99,  56.28) 09/02/2023   08:00:12  (  70.01,  56.30)    2.27                54
 09/02/2023   08:50:00   ( -69.90,-136.27) 09/02/2023   08:49:42  ( -69.91,-136.21)    2.28                18
 09/02/2023   09:40:30   (  69.04,  32.28) 09/02/2023   09:39:22  (  69.07,  30.31)   78.23                68
 09/05/2023   00:16:14   (  69.97, 172.07) 09/05/2023   00:16:41  (  69.95, 172.10)    3.08                27
 09/05/2023   01:06:55   ( -69.83, -20.40) 09/05/2023   01:06:11  ( -69.84, -20.41)    2.14                44