Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 26.  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)
 12/28/2022   07:10:37   (  70.15,  68.74) 12/28/2022   07:11:09  (  70.12,  68.76)    2.59                32
 12/28/2022   08:01:18   ( -70.00,-123.73) 12/28/2022   08:00:39  ( -70.01,-123.76)    1.59                39
 12/30/2022   22:36:56   ( -70.66,  16.38) 12/30/2022   22:38:06  ( -70.55,  17.61)   47.39                70
 12/30/2022   23:27:31   (  70.08,-175.39) 12/30/2022   23:27:40  (  70.06,-175.46)    3.36                 9
 12/31/2022   00:18:13   ( -69.99,  -7.94) 12/31/2022   00:17:09  ( -70.01,  -7.89)    2.70                64
 01/02/2023   14:53:42   ( -70.18, 132.91) 01/02/2023   14:54:42  ( -70.20, 132.97)    3.19                60
 01/02/2023   15:44:26   (  70.07, -59.61) 01/02/2023   15:44:09  (  70.08, -59.54)    3.41                17
 01/02/2023   16:34:58   ( -69.44, 108.62) 01/02/2023   16:33:48  ( -69.49, 107.27)   52.98                70
 01/05/2023   07:10:35   ( -70.12,-111.24) 01/05/2023   07:11:12  ( -70.10,-111.28)    2.39                37
 01/05/2023   08:01:19   (  70.01,  56.24) 01/05/2023   08:00:39  (  69.99,  56.20)    2.74                40
 01/07/2023   22:36:56   (  70.64,-163.61) 01/07/2023   22:38:06  (  70.48,-162.50)   44.74                70
 01/07/2023   23:27:30   ( -70.11,   4.53) 01/07/2023   23:27:41  ( -70.10,   4.60)    2.77                11
 01/08/2023   00:18:13   (  69.96, 172.08) 01/08/2023   00:17:08  (  69.99, 172.08)    3.41                65