Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2025 6 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 06/26/2025   20:42:55   (  -0.01,-104.73) (  -0.97,-108.99)  485.99                80
 06/27/2025   20:21:32   (  -0.01,-104.73) (   0.08,-104.47)   30.22                80
 06/30/2025   08:27:15   (   0.01,-104.72) (   0.14,-105.20)   54.92                80
 07/01/2025   08:05:51   (   0.01,-104.72) (  -0.92,-100.68)  461.55                80
 07/02/2025   20:30:29   (  -0.01,-104.74) (  -0.29,-105.98)  141.94                80
 07/03/2025   20:11:44   (  -0.01,-104.74) (   0.71,-101.45)  374.56                80
 07/05/2025   08:33:32   (   0.00,-104.74) (   0.44,-106.73)  226.54                80
 07/06/2025   08:12:08   (  -0.00,-104.74) (  -0.56,-102.19)  289.67                80
 07/07/2025   20:34:06   (   0.01,-104.75) (  -0.58,-107.51)  314.46                80
 07/08/2025   20:18:02   (   0.01,-104.75) (   0.42,-102.98)  201.88                80