Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2023   20:38:21   (  -0.00,-104.73) (  -0.93,-108.76)  459.60                80
 05/05/2023   20:22:17   (  -0.00,-104.73) (   0.12,-104.24)   56.49                80
 05/08/2023   08:25:22   (   0.00,-104.72) (   0.04,-104.99)   29.97                80
 05/09/2023   08:03:58   (  -0.00,-104.72) (  -0.95,-100.46)  485.36                80
 05/10/2023   20:25:55   (   0.01,-104.71) (  -0.23,-105.77)  120.55                80
 05/11/2023   20:09:50   (   0.01,-104.71) (   0.77,-101.24)  395.02                80
 05/13/2023   08:31:40   (  -0.02,-104.70) (   0.36,-106.52)  206.68                80
 05/14/2023   08:10:15   (  -0.02,-104.70) (  -0.63,-101.99)  308.95                80
 05/15/2023   20:32:13   (   0.02,-104.69) (  -0.54,-107.30)  296.74                80
 05/16/2023   20:16:08   (   0.02,-104.69) (   0.46,-102.77)  219.42                80