Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 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)
 09/14/2023   08:03:23   (  -0.00,-104.70) (  -0.93,-100.47)  482.32                80
 09/15/2023   20:25:20   (   0.00,-104.68) (  -0.22,-105.78)  124.64                80
 09/16/2023   20:09:16   (   0.00,-104.69) (   0.79,-101.25)  391.78                80
 09/18/2023   08:31:03   (  -0.00,-104.71) (   0.42,-106.52)  206.63                80
 09/19/2023   08:09:38   (  -0.00,-104.70) (  -0.60,-101.99)  309.35                80
 09/20/2023   20:31:35   (  -0.00,-104.68) (  -0.60,-107.29)  298.48                80
 09/21/2023   20:15:30   (  -0.00,-104.67) (   0.42,-102.76)  217.49                80
 09/23/2023   08:37:18   (   0.01,-104.69) (   0.77,-108.03)  381.15                80
 09/24/2023   08:15:53   (   0.01,-104.68) (  -0.25,-103.50)  134.45                80
 09/25/2023   20:37:49   (  -0.01,-104.65) (  -0.93,-108.81)  474.05                80
 09/26/2023   20:21:44   (  -0.02,-104.64) (   0.04,-104.27)   42.03                80