Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 10 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)
 10/23/2023   00:16:11   (  69.92, 172.09) 10/23/2023   00:16:54  (  69.92, 172.02)    3.01                43
 10/23/2023   01:06:53   ( -69.83, -20.45) 10/23/2023   01:06:24  ( -69.81, -20.50)    3.32                29
 10/25/2023   15:42:39   ( -70.67, 119.37) 10/25/2023   15:43:47  ( -70.60, 121.24)   69.14                68
 10/25/2023   16:33:11   (  69.92, -72.15) 10/25/2023   16:33:25  (  69.89, -72.14)    3.04                14
 10/25/2023   17:23:52   ( -69.77,  95.39) 10/25/2023   17:22:55  ( -69.79,  95.34)    2.27                57
 10/28/2023   07:59:26   ( -69.99,-123.81) 10/28/2023   08:00:28  ( -70.00,-123.76)    2.10                62
 10/28/2023   08:50:10   (  69.87,  43.67) 10/28/2023   08:49:55  (  69.88,  43.73)    2.57                15
 10/28/2023   09:40:43   ( -69.30,-148.18) 10/28/2023   09:39:33  ( -69.34,-149.38)   47.44                70
 10/31/2023   00:16:24   ( -69.95,  -8.00) 10/31/2023   00:16:57  ( -69.96,  -7.94)    2.74                33
 10/31/2023   01:07:08   (  69.84, 159.47) 10/31/2023   01:06:24  (  69.84, 159.55)    2.99                44
 11/02/2023   15:42:44   (  70.19, -59.93) 11/02/2023   15:43:55  (  70.09, -59.50)   19.24                71
 11/02/2023   16:33:22   ( -69.87, 107.87) 11/02/2023   16:33:27  ( -69.89, 107.84)    2.22                 5
 11/02/2023   17:24:06   (  69.76, -84.66) 11/02/2023   17:22:54  (  69.77, -84.68)    0.79                72