Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 16.  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)
 01/18/2023   14:53:36   ( -70.14, 132.93) 01/18/2023   14:54:31  ( -70.14, 132.92)    0.59                55
 01/18/2023   15:44:20   (  70.02, -59.58) 01/18/2023   15:43:58  (  70.03, -59.59)    1.14                22
 01/18/2023   16:34:48   ( -69.19, 108.94) 01/18/2023   16:33:40  ( -69.26, 106.99)   77.24                68
 01/21/2023   07:10:29   ( -70.10,-111.24) 01/21/2023   07:10:56  ( -70.13,-111.21)    3.36                27
 01/21/2023   08:01:13   (  69.99,  56.24) 01/21/2023   08:00:24  (  69.96,  56.20)    3.16                49
 01/23/2023   22:36:40   (  70.17,-162.89) 01/23/2023   22:37:51  (  70.18,-162.87)    1.33                71
 01/23/2023   23:27:22   ( -70.08,   4.57) 01/23/2023   23:27:21  ( -70.07,   4.61)    1.63                 1
 01/24/2023   00:18:03   (  69.81, 172.28) 01/24/2023   00:16:50  (  69.85, 171.94)   13.83                73
 01/26/2023   14:53:32   (  70.11, -47.03) 01/26/2023   14:54:15  (  70.13, -47.04)    2.24                43
 01/26/2023   15:44:14   ( -70.01, 120.44) 01/26/2023   15:43:45  ( -70.02, 120.44)    0.99                29
 01/29/2023   06:19:52   ( -70.84, -99.73) 01/29/2023   06:21:00  ( -70.75, -97.87)   69.07                68
 01/29/2023   07:10:23   (  70.06,  68.82) 01/29/2023   07:10:37  (  70.08,  68.80)    2.84                14
 01/29/2023   08:01:05   ( -69.96,-123.71) 01/29/2023   08:00:07  ( -69.98,-123.71)    2.02                58