Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 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)
 09/29/2023   00:16:14   ( -69.93,  -7.90) 09/29/2023   00:16:52  ( -69.93,  -7.97)    2.40                38
 09/29/2023   01:06:58   (  69.80, 159.59) 09/29/2023   01:06:19  (  69.82, 159.54)    3.13                39
 10/01/2023   15:42:35   (  70.46, -60.28) 10/01/2023   15:43:45  (  70.38, -59.06)   46.14                70
 10/01/2023   16:33:08   ( -69.90, 107.91) 10/01/2023   16:33:22  ( -69.89, 107.87)    2.07                14
 10/01/2023   17:23:52   (  69.78, -84.61) 10/01/2023   17:22:49  (  69.78, -84.64)    1.20                63
 10/04/2023   07:59:20   (  69.98,  56.25) 10/04/2023   08:00:21  (  69.98,  56.24)    0.46                61
 10/04/2023   08:50:02   ( -69.89,-136.30) 10/04/2023   08:49:51  ( -69.87,-136.28)    2.64                11
 10/04/2023   09:40:36   (  69.24,  31.95) 10/04/2023   09:39:26  (  69.32,  30.62)   52.89                70
 10/07/2023   00:16:12   (  69.93, 172.09) 10/07/2023   00:16:49  (  69.91, 172.04)    2.97                37
 10/07/2023   01:06:54   ( -69.84, -20.45) 10/07/2023   01:06:18  ( -69.86, -20.40)    3.37                36
 10/09/2023   15:42:32   ( -70.58, 119.54) 10/09/2023   15:43:41  ( -70.47, 121.09)   58.54                69
 10/09/2023   16:33:05   (  69.90, -72.08) 10/09/2023   16:33:16  (  69.92, -72.06)    2.54                11
 10/09/2023   17:23:47   ( -69.80,  95.38) 10/09/2023   17:22:46  ( -69.82,  95.43)    2.59                61