Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NPP
TLE Epoch: 2022 12 6.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2022   02:41:59   (  61.89, 144.31) 12/06/2022   02:42:12  (  61.89, 144.31)    0.08                13
 12/06/2022   03:28:23   ( -48.17, -40.53) 12/06/2022   03:28:53  ( -48.17, -40.55)    1.97                30
 12/06/2022   04:18:16   (  45.11, 128.00) 12/06/2022   04:18:48  (  45.11, 127.97)    2.26                32
 12/06/2022   05:31:30   ( -52.69, 130.00) 12/06/2022   05:32:23  ( -52.67, 130.00)    2.90                53
 12/06/2022   06:21:16   (  55.72, -61.06) 12/06/2022   06:22:12  (  55.72, -61.06)    0.20                56
 12/06/2022   07:08:19   ( -67.31, 115.63) 12/06/2022   07:09:31  ( -67.31, 115.61)    1.25                72