Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 20.  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)
 09/22/2025   10:31:24   (  -0.02,-136.99) (  -0.00,-136.92)    8.77                80
 09/24/2025   22:34:34   (   0.02,-137.00) (  -0.15,-137.68)   78.87                80
 09/25/2025   22:15:49   (   0.01,-136.99) (   0.86,-133.15)  437.57                80
 09/27/2025   10:40:16   (   0.00,-136.96) (   0.30,-138.42)  165.10                80
 09/28/2025   10:18:51   (   0.00,-136.95) (  -0.71,-133.88)  350.34                80
 09/29/2025   22:40:45   (  -0.00,-136.94) (  -0.50,-139.17)  254.53                80
 09/30/2025   22:24:39   (  -0.00,-136.92) (   0.51,-134.64)  260.47                80
 10/02/2025   10:46:26   (   0.00,-136.89) (   0.70,-139.90)  343.55                80
 10/03/2025   10:25:00   (  -0.00,-136.87) (  -0.32,-135.36)  171.12                80