Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2025 6 20.  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)
 06/21/2025   20:36:37   (  -0.02,-104.74) (  -0.66,-107.46)  311.47                80
 06/22/2025   20:15:14   (  -0.01,-104.74) (   0.39,-102.94)  204.47                80
 06/24/2025   08:39:42   (   0.00,-104.73) (   0.77,-108.22)  397.33                80
 06/25/2025   08:18:18   (  -0.00,-104.72) (  -0.22,-103.68)  118.43                80
 06/26/2025   20:40:16   (   0.01,-104.73) (  -0.92,-109.00)  486.18                80
 06/27/2025   20:24:12   (   0.01,-104.73) (   0.07,-104.47)   30.03                80
 06/30/2025   08:27:16   (  -0.01,-104.73) (   0.09,-105.21)   54.24                80
 07/01/2025   08:05:51   (  -0.01,-104.74) (  -0.90,-100.68)  462.36                80
 07/02/2025   20:27:48   (   0.01,-104.75) (  -0.30,-105.98)  141.26                80
 07/03/2025   20:11:45   (   0.01,-104.75) (   0.76,-101.46)  375.53                80