Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 6 13.  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)
 06/14/2025   22:47:03   (   0.01,-137.00) (  -0.83,-140.71)  423.43                80
 06/15/2025   22:31:00   (   0.00,-136.99) (   0.21,-136.19)   92.44                80
 06/18/2025   10:34:04   (   0.00,-136.97) (  -0.02,-136.93)    5.97                80
 06/20/2025   22:34:37   (  -0.00,-136.95) (  -0.19,-137.70)   85.58                80
 06/21/2025   22:18:33   (  -0.00,-136.94) (   0.86,-133.18)  429.11                80
 06/23/2025   10:37:40   (  -0.01,-136.91) (   0.36,-138.44)  175.04                80
 06/24/2025   10:21:37   (  -0.01,-136.89) (  -0.69,-133.92)  339.13                80
 06/25/2025   22:40:54   (   0.01,-136.86) (  -0.51,-139.22)  269.05                80
 06/26/2025   22:24:50   (   0.01,-136.84) (   0.49,-134.69)  245.00                80