Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 4.  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)
 07/04/2023   10:38:28   (  -0.02,-137.01) (   0.25,-138.31)  148.07                80
 07/05/2023   10:17:02   (  -0.03,-137.01) (  -0.75,-133.77)  368.37                80
 07/06/2023   22:38:58   (   0.03,-137.00) (  -0.45,-139.07)  236.60                80
 07/07/2023   22:22:52   (   0.03,-137.00) (   0.56,-134.54)  279.93                80
 07/09/2023   10:44:40   (  -0.03,-137.00) (   0.59,-139.81)  320.20                80
 07/10/2023   10:23:14   (  -0.03,-137.00) (  -0.42,-135.28)  196.01                80
 07/11/2023   22:45:09   (   0.04,-136.99) (  -0.77,-140.58)  409.77                80
 07/12/2023   22:29:04   (   0.04,-136.98) (   0.24,-136.05)  106.11                80
 07/14/2023   10:50:51   (  -0.05,-136.97) (   0.90,-141.32)  495.13                80
 07/15/2023   10:32:06   (  -0.05,-136.96) (  -0.10,-136.79)   20.26                80
 07/17/2023   22:32:36   (   0.06,-136.92) (  -0.06,-137.56)   71.83                80