Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 6 30.  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)
 06/30/2025   22:47:12   (   0.00,-137.00) (  -0.82,-140.75)  426.43                80
 07/01/2025   22:31:08   (  -0.00,-137.01) (   0.18,-136.22)   90.34                80
 07/04/2025   10:34:12   (  -0.01,-137.01) (  -0.03,-136.96)    5.65                80
 07/06/2025   22:34:44   (   0.02,-137.01) (  -0.18,-137.73)   83.68                80
 07/07/2025   22:18:41   (   0.01,-137.00) (   0.88,-133.21)  431.94                80
 07/09/2025   10:37:48   (  -0.01,-136.98) (   0.32,-138.48)  170.50                80
 07/10/2025   10:21:44   (  -0.01,-136.97) (  -0.68,-133.95)  344.54                80
 07/11/2025   22:41:01   (   0.01,-136.96) (  -0.51,-139.25)  262.13                80
 07/12/2025   22:24:57   (   0.01,-136.94) (   0.49,-134.72)  252.70                80
 07/14/2025   10:44:05   (  -0.01,-136.92) (   0.65,-140.00)  350.66                80