Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 10.  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)
 10/10/2023   22:38:24   (   0.02,-137.00) (  -0.42,-139.03)  231.30                80
 10/11/2023   22:22:18   (   0.02,-137.00) (   0.59,-134.50)  285.52                80
 10/13/2023   10:41:24   (  -0.00,-137.00) (   0.60,-139.76)  313.96                80
 10/14/2023   10:22:38   (   0.02,-137.00) (  -0.36,-135.21)  203.09                80
 10/15/2023   22:44:33   (  -0.03,-136.99) (  -0.82,-140.52)  401.50                80
 10/16/2023   22:28:28   (  -0.03,-136.99) (   0.19,-135.98)  114.56                80
 10/18/2023   10:50:14   (   0.03,-136.97) (   0.97,-141.25)  486.81                80
 10/19/2023   10:28:49   (   0.03,-136.96) (  -0.05,-136.72)   28.59                80
 10/21/2023   22:31:57   (  -0.03,-136.92) (  -0.14,-137.48)   63.42                80
 10/22/2023   22:13:11   (  -0.02,-136.90) (   0.84,-132.93)  451.37                80