Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 16.  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)
 08/16/2023   10:28:49   (   0.02,-137.00) (  -0.07,-136.66)   39.03                80
 08/18/2023   22:34:36   (  -0.02,-137.00) (  -0.11,-137.42)   47.35                80
 08/19/2023   22:13:10   (  -0.02,-137.00) (   0.89,-132.88)  469.51                80
 08/21/2023   10:37:35   (   0.02,-137.00) (   0.31,-138.14)  130.71                80
 08/22/2023   10:16:10   (   0.02,-136.99) (  -0.75,-133.61)  385.70                80
 08/23/2023   22:38:03   (  -0.03,-136.98) (  -0.47,-138.90)  219.16                80
 08/24/2023   22:21:57   (  -0.03,-136.97) (   0.53,-134.36)  296.66                80
 08/26/2023   10:43:42   (   0.04,-136.95) (   0.65,-139.62)  305.30                80
 08/27/2023   10:22:15   (   0.04,-136.93) (  -0.35,-135.08)  209.94                80
 08/28/2023   22:44:10   (  -0.05,-136.90) (  -0.80,-140.39)  396.58                80
 08/29/2023   22:25:23   (  -0.05,-136.88) (   0.21,-135.85)  118.41                80