Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 10 21.  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)
 10/23/2023   00:16:12   (  69.98, 172.02) 10/23/2023   00:16:53  (  69.97, 172.09)    2.94                41
 10/23/2023   01:06:53   ( -69.83, -20.45) 10/23/2023   01:06:23  ( -69.86, -20.43)    3.23                30
 10/25/2023   15:42:39   ( -70.66, 119.38) 10/25/2023   15:43:47  ( -70.59, 121.22)   68.34                68
 10/25/2023   16:33:11   (  69.92, -72.15) 10/25/2023   16:33:24  (  69.93, -72.09)    2.72                13
 10/25/2023   17:23:52   ( -69.77,  95.39) 10/25/2023   17:22:55  ( -69.77,  95.32)    2.66                57
 10/28/2023   07:59:26   ( -69.98,-123.80) 10/28/2023   08:00:28  ( -69.96,-123.81)    1.66                62
 10/28/2023   08:50:10   (  69.87,  43.68) 10/28/2023   08:49:55  (  69.85,  43.68)    1.64                15
 10/28/2023   09:40:43   ( -69.29,-148.17) 10/28/2023   09:39:32  ( -69.36,-149.35)   47.06                71
 10/31/2023   00:16:24   ( -69.93,  -7.98) 10/31/2023   00:16:56  ( -69.96,  -7.93)    3.10                32
 10/31/2023   01:07:08   (  69.83, 159.49) 10/31/2023   01:06:23  (  69.84, 159.55)    2.82                45
 11/02/2023   15:42:43   (  70.11, -59.82) 11/02/2023   15:43:54  (  70.06, -59.54)   12.17                71
 11/02/2023   16:33:23   ( -69.90, 107.82) 11/02/2023   16:33:25  ( -69.91, 107.88)    2.51                 2
 11/02/2023   17:24:06   (  69.74, -84.64) 11/02/2023   17:22:53  (  69.73, -84.71)    3.20                73