Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 22.  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)
 08/22/2023   10:16:23   (   0.01,-137.02) (  -0.75,-133.67)  382.12                80
 08/23/2023   22:38:20   (  -0.01,-137.01) (  -0.43,-138.98)  223.67                80
 08/24/2023   22:22:16   (  -0.01,-137.01) (   0.56,-134.44)  292.07                80
 08/26/2023   10:44:04   (   0.02,-137.00) (   0.65,-139.71)  309.32                80
 08/27/2023   10:22:40   (   0.02,-137.00) (  -0.40,-135.19)  205.82                80
 08/28/2023   22:44:37   (  -0.03,-136.97) (  -0.84,-140.49)  401.61                80
 08/29/2023   22:25:53   (  -0.03,-136.96) (   0.21,-135.97)  113.31                80
 08/31/2023   10:50:21   (   0.03,-136.95) (   0.98,-141.24)  488.88                80
 09/01/2023   10:28:57   (   0.03,-136.94) (  -0.01,-136.71)   25.81                80
 09/03/2023   22:32:10   (  -0.03,-136.90) (  -0.15,-137.49)   67.70                80
 09/04/2023   22:13:25   (  -0.03,-136.88) (   0.85,-132.96)  446.64                80