Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NPP
TLE Epoch: 2024 11 18.  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)