Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 22.  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)
 09/23/2023   15:42:33   ( -70.35, 119.91) 09/23/2023   15:43:44  ( -70.29, 120.80)   34.13                71
 09/23/2023   16:33:11   (  69.91, -72.10) 09/23/2023   16:33:16  (  69.91, -72.09)    0.79                 5
 09/23/2023   17:23:52   ( -69.78,  95.41) 09/23/2023   17:22:46  ( -69.80,  95.39)    2.55                66
 09/26/2023   07:59:21   ( -69.98,-123.75) 09/26/2023   08:00:17  ( -70.00,-123.71)    2.93                56
 09/26/2023   08:50:05   (  69.86,  43.74) 09/26/2023   08:49:45  (  69.84,  43.71)    2.04                20
 09/26/2023   09:40:34   ( -69.09,-147.83) 09/26/2023   09:39:25  ( -69.18,-149.55)   68.86                69
 09/29/2023   00:16:15   ( -69.94,  -7.92) 09/29/2023   00:16:45  ( -69.96,  -7.88)    2.67                30
 09/29/2023   01:06:59   (  69.82, 159.57) 09/29/2023   01:06:13  (  69.80, 159.53)    2.98                46
 10/01/2023   15:42:29   (  70.16, -59.80) 10/01/2023   15:43:40  (  70.10, -59.43)   15.63                71
 10/01/2023   16:33:08   ( -69.91, 107.89) 10/01/2023   16:33:12  ( -69.88, 107.90)    3.11                 4
 10/01/2023   17:23:52   (  69.80, -84.63) 10/01/2023   17:22:39  (  69.77, -84.61)    2.84                73
 10/04/2023   07:59:20   (  69.99,  56.23) 10/04/2023   08:00:08  (  69.99,  56.31)    2.78                48
 10/04/2023   08:50:01   ( -69.84,-136.23) 10/04/2023   08:49:39  ( -69.83,-136.28)    2.62                22