Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 14.  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)
 05/14/2023   08:10:15   (  -0.00,-104.72) (  -0.62,-101.98)  311.64                80
 05/15/2023   20:32:12   (   0.00,-104.72) (  -0.55,-107.30)  292.73                80
 05/16/2023   20:16:07   (   0.00,-104.73) (   0.45,-102.77)  223.91                80
 05/18/2023   08:37:56   (   0.00,-104.73) (   0.71,-108.04)  376.45                80
 05/19/2023   08:16:31   (   0.00,-104.73) (  -0.29,-103.51)  139.86                80
 05/20/2023   20:38:28   (  -0.01,-104.73) (  -0.92,-108.81)  465.06                80
 05/21/2023   20:22:23   (  -0.01,-104.74) (   0.09,-104.28)   51.49                80
 05/24/2023   08:25:27   (   0.01,-104.75) (   0.06,-105.03)   32.19                80
 05/25/2023   08:04:02   (   0.01,-104.75) (  -0.95,-100.50)  484.12                80
 05/26/2023   20:25:59   (  -0.01,-104.75) (  -0.25,-105.81)  120.75                80
 05/27/2023   20:09:54   (  -0.00,-104.75) (   0.77,-101.28)  396.08                80