Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 26.  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)
 08/28/2023   00:16:08   ( -69.97,  -7.89) 08/28/2023   00:16:44  ( -69.95,  -7.92)    1.90                36
 08/28/2023   01:06:52   (  69.84, 159.60) 08/28/2023   01:06:11  (  69.85, 159.58)    1.09                41
 08/30/2023   15:42:29   (  70.39, -60.10) 08/30/2023   15:43:39  (  70.28, -59.21)   35.54                70
 08/30/2023   16:33:04   ( -69.93, 107.92) 08/30/2023   16:33:13  ( -69.95, 107.96)    2.22                 9
 08/30/2023   17:23:48   (  69.81, -84.59) 08/30/2023   17:22:41  (  69.79, -84.62)    2.93                67
 09/02/2023   07:59:18   (  69.99,  56.28) 09/02/2023   08:00:13  (  69.97,  56.24)    2.75                55
 09/02/2023   08:49:59   ( -69.85,-136.20) 09/02/2023   08:49:43  ( -69.86,-136.27)    3.26                16
 09/02/2023   09:40:30   (  69.04,  32.28) 09/02/2023   09:39:22  (  69.09,  30.33)   77.61                68
 09/05/2023   00:16:14   (  69.97, 172.07) 09/05/2023   00:16:41  (  69.97, 172.13)    2.33                27
 09/05/2023   01:06:55   ( -69.83, -20.40) 09/05/2023   01:06:12  ( -69.81, -20.46)    3.38                43
 09/07/2023   15:42:28   ( -70.23, 120.12) 09/07/2023   15:43:39  ( -70.17, 120.65)   21.50                71
 09/07/2023   16:33:08   (  69.91, -72.07) 09/07/2023   16:33:09  (  69.89, -72.10)    2.66                 1
 09/07/2023   17:23:49   ( -69.76,  95.46) 09/07/2023   17:22:39  ( -69.78,  95.39)    3.27                70