Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 12.  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)
 08/12/2023   22:44:35   (  -0.01,-137.00) (  -0.80,-140.47)  395.56                80
 08/13/2023   22:28:29   (  -0.01,-136.99) (   0.24,-135.94)  120.84                80
 08/15/2023   10:50:14   (   0.02,-136.98) (   0.96,-141.20)  480.37                80
 08/16/2023   10:28:48   (   0.02,-136.97) (  -0.03,-136.65)   35.85                80
 08/18/2023   22:34:36   (  -0.02,-136.96) (  -0.15,-137.41)   52.89                80
 08/19/2023   22:13:10   (  -0.02,-136.95) (   0.90,-132.89)  463.01                80
 08/21/2023   10:37:36   (   0.02,-136.92) (   0.29,-138.14)  139.09                80
 08/22/2023   10:16:09   (   0.02,-136.91) (  -0.70,-133.60)  376.24                80
 08/23/2023   22:38:03   (  -0.03,-136.88) (  -0.46,-138.91)  229.83                80
 08/24/2023   22:21:57   (  -0.03,-136.86) (   0.54,-134.37)  284.95                80