Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 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)
 09/26/2023   07:59:21   ( -69.99,-123.76) 09/26/2023   08:00:21  ( -70.01,-123.73)    2.51                60
 09/26/2023   08:50:05   (  69.86,  43.74) 09/26/2023   08:49:49  (  69.85,  43.70)    1.63                16
 09/26/2023   09:40:37   ( -69.25,-148.07) 09/26/2023   09:39:27  ( -69.30,-149.42)   53.43                70
 09/29/2023   00:16:15   ( -69.95,  -7.93) 09/29/2023   00:16:52  ( -69.96,  -7.92)    1.26                37
 09/29/2023   01:06:59   (  69.83, 159.56) 09/29/2023   01:06:20  (  69.80, 159.51)    3.46                39
 10/01/2023   15:42:35   (  70.48, -60.31) 10/01/2023   15:43:45  (  70.37, -59.09)   47.33                70
 10/01/2023   16:33:08   ( -69.92, 107.88) 10/01/2023   16:33:21  ( -69.93, 107.92)    1.65                13
 10/01/2023   17:23:52   (  69.80, -84.64) 10/01/2023   17:22:48  (  69.82, -84.59)    2.64                64
 10/04/2023   07:59:19   (  69.95,  56.30) 10/04/2023   08:00:21  (  69.96,  56.22)    3.60                62
 10/04/2023   08:50:01   ( -69.86,-136.25) 10/04/2023   08:49:51  ( -69.86,-136.30)    1.77                10
 10/04/2023   09:40:36   (  69.26,  31.92) 10/04/2023   09:39:26  (  69.30,  30.60)   52.21                70
 10/07/2023   00:16:13   (  69.95, 172.07) 10/07/2023   00:16:49  (  69.96, 172.10)    1.89                36
 10/07/2023   01:06:55   ( -69.85, -20.48) 10/07/2023   01:06:19  ( -69.86, -20.41)    2.50                36
 10/09/2023   15:42:33   ( -70.59, 119.53) 10/09/2023   15:43:42  ( -70.47, 121.09)   59.29                69
 10/09/2023   16:33:06   (  69.91, -72.10) 10/09/2023   16:33:17  (  69.92, -72.07)    1.74                11
 10/09/2023   17:23:48   ( -69.81,  95.36) 10/09/2023   17:22:47  ( -69.82,  95.43)    2.54                61