Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 27.  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   00:16:09   ( -69.98,  -7.92) 08/28/2023   00:16:44  ( -69.99,  -7.86)    2.31                35
 08/28/2023   01:06:53   (  69.86, 159.58) 08/28/2023   01:06:12  (  69.83, 159.56)    2.52                41
 08/30/2023   15:42:28   (  70.35, -60.04) 08/30/2023   15:43:39  (  70.26, -59.22)   31.78                71
 08/30/2023   16:33:04   ( -69.95, 107.90) 08/30/2023   16:33:13  ( -69.93, 107.94)    2.16                 9
 08/30/2023   17:23:48   (  69.82, -84.61) 08/30/2023   17:22:40  (  69.83, -84.56)    1.78                68
 09/02/2023   07:59:18   (  70.00,  56.26) 09/02/2023   08:00:12  (  70.01,  56.30)    2.23                54
 09/02/2023   08:49:59   ( -69.86,-136.22) 09/02/2023   08:49:43  ( -69.85,-136.29)    3.13                16
 09/02/2023   09:40:30   (  69.05,  32.26) 09/02/2023   09:39:22  (  69.08,  30.32)   77.32                68
 09/05/2023   00:16:14   (  69.98, 172.05) 09/05/2023   00:16:41  (  69.96, 172.12)    3.32                27
 09/05/2023   01:06:55   ( -69.84, -20.42) 09/05/2023   01:06:11  ( -69.86, -20.40)    1.94                44
 09/07/2023   15:42:29   ( -70.24, 120.11) 09/07/2023   15:43:40  ( -70.16, 120.65)   22.19                71
 09/07/2023   16:33:09   (  69.91, -72.08) 09/07/2023   16:33:10  (  69.89, -72.10)    3.25                 1
 09/07/2023   17:23:50   ( -69.77,  95.45) 09/07/2023   17:22:40  ( -69.78,  95.39)    2.44                70