Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2025 6 18.  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)
 06/19/2025   08:33:24   (   0.02,-104.73) (   0.46,-106.69)  223.47                80
 06/20/2025   08:12:01   (   0.01,-104.73) (  -0.59,-102.17)  292.63                80
 06/21/2025   20:33:58   (  -0.01,-104.73) (  -0.62,-107.47)  311.81                80
 06/22/2025   20:17:54   (  -0.00,-104.73) (   0.37,-102.94)  204.11                80
 06/24/2025   08:39:42   (  -0.00,-104.73) (   0.79,-108.21)  397.66                80
 06/25/2025   08:18:19   (  -0.01,-104.72) (  -0.26,-103.69)  118.11                80
 06/26/2025   20:40:16   (   0.01,-104.73) (  -0.94,-109.00)  486.71                80
 06/27/2025   20:24:11   (   0.01,-104.73) (   0.05,-104.46)   29.56                80
 06/30/2025   08:27:15   (  -0.01,-104.73) (   0.11,-105.21)   54.67                80
 07/01/2025   08:05:51   (  -0.01,-104.73) (  -0.89,-100.67)  461.90                80