Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 4.  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)
 03/04/2023   22:36:33   ( -70.62,  16.35) 03/04/2023   22:37:43  ( -70.52,  17.53)   45.31                70
 03/04/2023   23:27:09   (  70.08,-175.51) 03/04/2023   23:27:16  (  70.09,-175.44)    2.67                 7
 03/05/2023   00:17:50   ( -69.94,  -7.98) 03/05/2023   00:16:46  ( -69.97,  -7.98)    3.45                64
 03/07/2023   14:53:18   ( -70.12, 132.89) 03/07/2023   14:54:17  ( -70.13, 132.86)    1.77                59
 03/07/2023   15:44:02   (  70.01, -59.63) 03/07/2023   15:43:44  (  70.03, -59.64)    2.40                18
 03/07/2023   16:34:33   ( -69.34, 108.67) 03/07/2023   16:33:24  ( -69.37, 107.08)   62.55                69
 03/10/2023   07:10:11   ( -70.11,-111.33) 03/10/2023   07:10:43  ( -70.09,-111.32)    2.80                32
 03/10/2023   08:00:55   (  70.01,  56.15) 03/10/2023   08:00:10  (  69.98,  56.17)    2.74                45
 03/12/2023   22:36:26   (  70.38,-163.28) 03/12/2023   22:37:37  (  70.27,-162.80)   21.19                71
 03/12/2023   23:27:04   ( -70.07,   4.52) 03/12/2023   23:27:09  ( -70.05,   4.52)    1.52                 5
 03/13/2023   00:17:48   (  69.96, 171.99) 03/13/2023   00:16:36  (  69.94, 172.01)    2.17                72
 03/15/2023   14:53:15   (  70.13, -47.13) 03/15/2023   14:54:04  (  70.13, -47.11)    0.77                49
 03/15/2023   15:43:57   ( -70.03, 120.34) 03/15/2023   15:43:34  ( -70.02, 120.37)    1.30                23