Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 28.  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)
 04/28/2025   22:27:34   (   0.01,-137.00) (   0.24,-135.99)  115.91                80
 04/30/2025   10:52:04   (  -0.01,-137.00) (   0.95,-141.27)  486.04                80
 05/01/2025   10:30:41   (  -0.01,-137.00) (  -0.05,-136.74)   29.46                80
 05/03/2025   22:33:56   (   0.00,-136.99) (  -0.10,-137.53)   60.86                80
 05/04/2025   22:17:52   (   0.00,-136.99) (   0.91,-133.00)  454.61                80
 05/06/2025   10:37:02   (   0.00,-136.98) (   0.26,-138.28)  147.86                80
 05/07/2025   10:20:59   (   0.00,-136.98) (  -0.75,-133.76)  367.51                80
 05/08/2025   22:40:16   (  -0.00,-136.97) (  -0.45,-139.07)  238.51                80
 05/09/2025   22:24:13   (  -0.00,-136.96) (   0.57,-134.54)  276.59                80
 05/11/2025   10:43:22   (   0.00,-136.95) (   0.65,-139.81)  326.72                80
 05/12/2025   10:27:19   (   0.00,-136.93) (  -0.37,-135.28)  187.85                80