Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2026 6 13.  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)
 06/13/2026   22:24:56   (  -0.00,-137.01) (   0.55,-134.45)  291.20                80
 06/15/2026   10:46:42   (   0.01,-136.99) (   0.64,-139.72)  311.22                80
 06/16/2026   10:25:17   (   0.01,-136.98) (  -0.38,-135.18)  204.60                80
 06/17/2026   22:47:12   (  -0.02,-136.98) (  -0.78,-140.49)  400.04                80
 06/18/2026   22:31:06   (  -0.02,-136.97) (   0.18,-135.95)  115.71                80
 06/20/2026   10:52:52   (   0.02,-136.95) (   1.00,-141.21)  487.06                80
 06/21/2026   10:31:27   (   0.02,-136.94) (  -0.02,-136.68)   28.59                80
 06/23/2026   22:34:35   (  -0.03,-136.92) (  -0.17,-137.45)   61.20                80
 06/24/2026   22:18:30   (  -0.03,-136.90) (   0.85,-132.92)  454.09                80
 06/26/2026   10:40:16   (   0.04,-136.87) (   0.32,-138.18)  149.61                80
 06/27/2026   10:18:51   (   0.04,-136.85) (  -0.71,-133.65)  365.13                80