Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2026 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)
 04/29/2026   10:25:50   (   0.00,-137.01) (  -0.42,-135.20)  205.70                80
 04/30/2026   22:47:45   (  -0.00,-137.02) (  -0.78,-140.51)  397.40                80
 05/01/2026   22:31:40   (  -0.00,-137.02) (   0.21,-135.97)  119.18                80
 05/03/2026   10:53:28   (  -0.00,-137.01) (   0.92,-141.26)  482.77                80
 05/04/2026   10:32:03   (  -0.00,-137.01) (  -0.07,-136.72)   33.11                80
 05/06/2026   22:35:13   (   0.02,-137.00) (  -0.12,-137.49)   56.19                80
 05/07/2026   22:19:08   (   0.02,-136.99) (   0.93,-132.97)  459.40                80
 05/09/2026   10:40:55   (  -0.02,-136.97) (   0.26,-138.24)  143.78                80
 05/10/2026   10:19:30   (  -0.01,-136.96) (  -0.73,-133.70)  371.51                80
 05/11/2026   22:41:25   (   0.02,-136.95) (  -0.43,-139.01)  234.18                80