Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 23.  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)
 01/23/2023   22:36:50   (  70.69,-163.71) 01/23/2023   22:38:00  (  70.58,-162.36)   51.16                70
 01/23/2023   23:27:22   ( -70.07,   4.57) 01/23/2023   23:27:37  ( -70.08,   4.55)    1.48                15
 01/24/2023   00:18:06   (  69.95, 172.06) 01/24/2023   00:17:04  (  69.98, 172.05)    2.62                62
 01/26/2023   14:53:33   (  70.15, -47.09) 01/26/2023   14:54:38  (  70.14, -47.12)    1.39                65
 01/26/2023   15:44:15   ( -70.06, 120.37) 01/26/2023   15:44:08  ( -70.04, 120.36)    2.02                 7
 01/26/2023   16:34:52   (  69.57, -71.60) 01/26/2023   16:33:41  (  69.60, -72.60)   38.90                71
 01/29/2023   07:10:24   (  70.09,  68.77) 01/29/2023   07:11:07  (  70.11,  68.71)    3.16                43
 01/29/2023   08:01:06   ( -70.00,-123.77) 01/29/2023   08:00:37  ( -70.01,-123.81)    1.52                29
 01/31/2023   22:36:49   ( -71.05,  15.70) 01/31/2023   22:37:55  ( -70.97,  18.22)   91.63                66
 01/31/2023   23:27:17   (  70.10,-175.48) 01/31/2023   23:27:36  (  70.09,-175.44)    1.74                19
 02/01/2023   00:17:59   ( -70.01,  -8.01) 02/01/2023   00:17:06  ( -69.99,  -7.95)    3.02                53
 02/03/2023   14:53:26   ( -70.23, 132.79) 02/03/2023   14:54:37  ( -70.21, 132.96)    6.73                71
 02/03/2023   15:44:08   (  70.02, -59.58) 02/03/2023   15:44:05  (  70.04, -59.64)    2.93                 3
 02/03/2023   16:34:49   ( -69.87, 107.97) 02/03/2023   16:33:36  ( -69.88, 107.78)    7.35                73