Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 29.  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)
 07/30/2023   10:50:34   (   0.03,-137.00) (   1.01,-141.25)  484.94                80
 07/31/2023   10:29:09   (   0.03,-137.00) (  -0.02,-136.72)   31.06                80
 08/02/2023   22:32:17   (  -0.03,-136.96) (  -0.15,-137.48)   59.30                80
 08/03/2023   22:16:12   (  -0.03,-136.95) (   0.88,-132.95)  456.44                80
 08/05/2023   10:37:57   (   0.03,-136.95) (   0.34,-138.21)  144.59                80
 08/06/2023   10:16:32   (   0.03,-136.93) (  -0.69,-133.68)  370.98                80
 08/07/2023   22:38:26   (  -0.04,-136.91) (  -0.49,-138.98)  235.78                80
 08/08/2023   22:22:20   (  -0.04,-136.89) (   0.48,-134.43)  279.52                80
 08/10/2023   10:44:06   (   0.04,-136.87) (   0.68,-139.70)  322.39                80
 08/11/2023   10:22:39   (   0.05,-136.85) (  -0.31,-135.16)  192.46                80