Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 7 17.  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)
 07/17/2025   22:31:14   (   0.01,-137.01) (   0.18,-136.24)   87.99                80
 07/20/2025   10:31:36   (  -0.01,-136.99) (   0.01,-136.97)    2.54                80
 07/22/2025   22:34:49   (   0.01,-136.98) (  -0.18,-137.75)   88.30                80
 07/23/2025   22:18:45   (   0.01,-136.97) (   0.83,-133.22)  426.90                80
 07/25/2025   10:40:33   (  -0.01,-136.94) (   0.31,-138.50)  176.61                80
 07/26/2025   10:21:49   (  -0.01,-136.93) (  -0.70,-133.97)  338.58                80
 07/27/2025   22:41:05   (   0.01,-136.93) (  -0.53,-139.27)  266.83                80
 07/28/2025   22:25:00   (   0.01,-136.92) (   0.48,-134.74)  248.34                80
 07/30/2025   10:44:09   (  -0.01,-136.89) (   0.66,-140.01)  355.48                80
 07/31/2025   10:28:03   (  -0.01,-136.87) (  -0.29,-135.47)  159.30                80