Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 7 10.  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)
 07/10/2023   23:25:59   (  70.06,-175.43) 07/10/2023   23:26:56  (  70.06,-175.39)    1.34                57
 07/11/2023   00:16:41   ( -69.97,  -7.97) 07/11/2023   00:16:26  ( -69.95,  -7.92)    2.77                15
 07/11/2023   01:07:13   (  69.22, 160.43) 07/11/2023   01:06:04  (  69.24, 158.76)   65.77                69
 07/13/2023   15:42:51   (  69.99, -59.55) 07/13/2023   15:43:27  (  69.99, -59.61)    2.46                36
 07/13/2023   16:33:33   ( -69.90, 107.91) 07/13/2023   16:32:57  ( -69.88, 107.86)    3.00                36
 07/16/2023   07:09:12   ( -70.72,-112.23) 07/16/2023   07:10:20  ( -70.60,-110.48)   65.80                68
 07/16/2023   07:59:44   (  69.99,  56.23) 07/16/2023   07:59:56  (  70.00,  56.29)    2.83                12
 07/16/2023   08:50:25   ( -69.84,-136.22) 07/16/2023   08:49:27  ( -69.84,-136.30)    3.01                58
 07/18/2023   23:25:51   ( -70.04,   4.62) 07/18/2023   23:26:58  ( -70.06,   4.61)    2.10                67
 07/19/2023   00:16:35   (  69.94, 172.08) 07/19/2023   00:16:25  (  69.95, 172.10)    0.89                10
 07/19/2023   01:07:11   ( -69.52, -19.98) 07/19/2023   01:05:59  ( -69.62, -20.72)   30.90                72
 07/21/2023   15:42:44   ( -70.04, 120.39) 07/21/2023   15:43:27  ( -70.04, 120.47)    2.84                43
 07/21/2023   16:33:27   (  69.89, -72.07) 07/21/2023   16:32:54  (  69.92, -72.05)    3.37                33