Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 10.  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)
 04/11/2025   22:46:31   (   0.00,-137.00) (  -0.81,-140.56)  406.32                80
 04/12/2025   22:30:26   (   0.00,-136.99) (   0.24,-136.03)  110.56                80
 04/14/2025   10:52:11   (  -0.00,-136.98) (   0.94,-141.29)  490.14                80
 04/15/2025   10:30:45   (  -0.00,-136.98) (  -0.06,-136.75)   26.16                80
 04/17/2025   22:33:51   (   0.01,-136.95) (  -0.13,-137.50)   62.97                80
 04/18/2025   22:17:45   (   0.01,-136.94) (   0.88,-132.96)  452.54                80
 04/20/2025   10:39:30   (  -0.01,-136.91) (   0.29,-138.22)  150.04                80
 04/21/2025   10:18:04   (  -0.01,-136.89) (  -0.72,-133.68)  365.18                80
 04/22/2025   22:39:57   (   0.01,-136.86) (  -0.45,-138.98)  240.73                80
 04/23/2025   22:23:50   (   0.01,-136.84) (   0.52,-134.43)  274.40                80