Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 28.  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   00:16:15   ( -69.96,  -7.95) 09/29/2023   00:16:52  ( -69.95,  -7.93)    1.12                37
 09/29/2023   01:06:59   (  69.83, 159.55) 09/29/2023   01:06:19  (  69.85, 159.57)    2.07                40
 10/01/2023   15:42:35   (  70.49, -60.32) 10/01/2023   15:43:45  (  70.36, -59.10)   47.76                70
 10/01/2023   16:33:08   ( -69.93, 107.86) 10/01/2023   16:33:21  ( -69.92, 107.90)    2.18                13
 10/01/2023   17:23:52   (  69.81, -84.65) 10/01/2023   17:22:48  (  69.81, -84.60)    1.95                64
 10/04/2023   07:59:20   (  70.00,  56.21) 10/04/2023   08:00:20  (  70.01,  56.29)    3.06                60
 10/04/2023   08:50:01   ( -69.86,-136.26) 10/04/2023   08:49:51  ( -69.85,-136.31)    2.46                10
 10/04/2023   09:40:36   (  69.27,  31.91) 10/04/2023   09:39:26  (  69.30,  30.59)   52.09                70
 10/07/2023   00:16:13   (  69.95, 172.06) 10/07/2023   00:16:49  (  69.96, 172.09)    1.36                36
 10/07/2023   01:06:55   ( -69.86, -20.49) 10/07/2023   01:06:19  ( -69.85, -20.42)    2.84                36
 10/09/2023   15:42:33   ( -70.60, 119.52) 10/09/2023   15:43:42  ( -70.47, 121.08)   59.66                69
 10/09/2023   16:33:06   (  69.91, -72.11) 10/09/2023   16:33:17  (  69.92, -72.07)    1.43                11
 10/09/2023   17:23:48   ( -69.82,  95.35) 10/09/2023   17:22:47  ( -69.81,  95.42)    2.58                61