Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 22.  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)
 05/24/2023   08:25:27   (   0.00,-104.72) (   0.04,-105.03)   35.49                80
 05/25/2023   08:04:02   (   0.01,-104.72) (  -0.91,-100.49)  480.75                80
 05/26/2023   20:25:59   (  -0.01,-104.71) (  -0.24,-105.81)  124.63                80
 05/27/2023   20:09:55   (  -0.02,-104.71) (   0.77,-101.28)  391.88                80
 05/29/2023   08:31:42   (   0.02,-104.72) (   0.43,-106.54)  208.12                80
 05/30/2023   08:10:18   (   0.02,-104.72) (  -0.59,-102.02)  308.12                80
 05/31/2023   20:32:14   (  -0.02,-104.71) (  -0.61,-107.32)  297.78                80
 06/01/2023   20:16:09   (  -0.01,-104.71) (   0.41,-102.79)  218.49                80
 06/03/2023   08:37:58   (   0.00,-104.72) (   0.73,-108.07)  381.70                80
 06/04/2023   08:16:32   (   0.00,-104.71) (  -0.24,-103.53)  134.05                80