Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 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)
 09/30/2025   22:21:59   (   0.01,-137.00) (   0.55,-134.64)  269.11                80
 10/02/2025   10:46:26   (  -0.02,-137.00) (   0.64,-139.90)  331.05                80
 10/03/2025   10:25:00   (  -0.02,-137.00) (  -0.39,-135.37)  185.69                80
 10/04/2025   22:46:54   (   0.02,-137.00) (  -0.80,-140.66)  417.68                80
 10/05/2025   22:30:49   (   0.01,-136.99) (   0.23,-136.13)   99.22                80
 10/08/2025   10:31:08   (   0.02,-136.98) (   0.01,-136.84)   15.48                80
 10/10/2025   22:34:17   (  -0.03,-136.95) (  -0.15,-137.60)   74.08                80
 10/11/2025   22:18:10   (  -0.02,-136.93) (   0.83,-133.06)  441.28                80
 10/13/2025   10:39:55   (   0.03,-136.90) (   0.36,-138.31)  161.21                80
 10/14/2025   10:18:30   (   0.02,-136.88) (  -0.69,-133.79)  353.90                80