Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and METOP-C
TLE Epoch: 2023 4 4.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(METOP-C) METOP-C Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2023   01:34:15   ( -73.47, -33.42) 04/18/2023   01:35:21  ( -73.42, -30.52)   92.05                66
 04/18/2023   02:24:57   (  73.29, 134.30) 04/18/2023   02:26:05  (  73.23, 136.40)   67.50                68