Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 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)
 04/21/2025   10:20:44   (   0.00,-136.97) (  -0.75,-133.69)  374.33                80
 04/22/2025   22:39:58   (  -0.00,-136.97) (  -0.42,-138.98)  229.26                80
 04/23/2025   22:23:50   (  -0.00,-136.96) (   0.53,-134.43)  287.01                80
 04/25/2025   10:45:35   (   0.00,-136.93) (   0.64,-139.69)  315.28                80
 04/26/2025   10:24:09   (   0.00,-136.92) (  -0.38,-135.16)  200.55                80
 04/27/2025   22:46:02   (  -0.00,-136.90) (  -0.77,-140.45)  404.13                80
 04/28/2025   22:29:55   (  -0.00,-136.88) (   0.19,-135.90)  111.19                80
 04/30/2025   10:51:40   (  -0.00,-136.84) (   0.97,-141.16)  492.71                80
 05/01/2025   10:30:14   (  -0.00,-136.82) (  -0.05,-136.63)   22.02                80
 05/03/2025   22:33:18   (  -0.01,-136.77) (  -0.17,-137.37)   68.93                80