Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 07/22/2023   22:38:45   (   0.01,-137.00) (  -0.42,-139.05)  232.20                80
 07/23/2023   22:22:39   (   0.01,-137.00) (   0.54,-134.50)  284.41                80
 07/25/2023   10:41:45   (  -0.01,-137.00) (   0.64,-139.76)  316.24                80
 07/26/2023   10:23:00   (  -0.01,-136.99) (  -0.38,-135.23)  199.82                80
 07/27/2023   22:44:55   (   0.01,-136.97) (  -0.77,-140.54)  405.92                80
 07/28/2023   22:28:48   (   0.00,-136.96) (   0.20,-135.99)  109.55                80
 07/30/2023   10:47:55   (  -0.00,-136.94) (   0.98,-141.26)  492.91                80
 07/31/2023   10:31:49   (  -0.00,-136.92) (  -0.05,-136.73)   21.90                80
 08/02/2023   22:32:18   (   0.00,-136.87) (  -0.12,-137.49)   70.92                80
 08/03/2023   22:16:12   (   0.00,-136.85) (   0.86,-132.95)  443.70                80