Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and METOP-B
TLE Epoch: 2023 5 14.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(METOP-B) METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2023   04:18:37   (  72.11, 108.16) 05/14/2023   04:17:28  (  72.14, 106.21)   66.60                69
 05/14/2023   05:09:20   ( -72.08, -84.46) 05/14/2023   05:08:11  ( -72.08, -86.58)   72.51                69