Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 25.  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)
 08/26/2023   10:44:05   (  -0.02,-137.01) (   0.60,-139.72)  309.81                80
 08/27/2023   10:22:41   (  -0.03,-137.00) (  -0.45,-135.20)  205.34                80
 08/28/2023   22:44:38   (   0.03,-136.98) (  -0.73,-140.51)  402.38                80
 08/29/2023   22:28:34   (   0.03,-136.97) (   0.26,-135.98)  112.61                80
 08/31/2023   10:47:42   (  -0.04,-136.96) (   0.93,-141.25)  489.25                80
 09/01/2023   10:31:38   (  -0.04,-136.95) (  -0.06,-136.72)   25.80                80
 09/03/2023   22:32:11   (   0.04,-136.91) (  -0.10,-137.50)   67.74                80
 09/04/2023   22:16:06   (   0.04,-136.89) (   0.90,-132.97)  446.75                80
 09/06/2023   10:35:14   (  -0.04,-136.88) (   0.29,-138.24)  156.26                80
 09/07/2023   10:19:11   (  -0.05,-136.86) (  -0.77,-133.73)  357.74                80