Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 18.  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)
 04/18/2025   22:17:45   (  -0.00,-137.00) (   0.87,-132.96)  459.42                80
 04/20/2025   10:39:30   (   0.00,-136.98) (   0.30,-138.22)  142.27                80
 04/21/2025   10:18:04   (   0.00,-136.97) (  -0.71,-133.68)  374.01                80
 04/22/2025   22:39:57   (   0.00,-136.96) (  -0.46,-138.97)  229.82                80
 04/23/2025   22:23:51   (   0.00,-136.95) (   0.56,-134.44)  286.30                80
 04/25/2025   10:45:36   (  -0.00,-136.92) (   0.62,-139.70)  316.06                80
 04/26/2025   10:24:09   (   0.00,-136.91) (  -0.41,-135.16)  199.65                80
 04/27/2025   22:46:02   (   0.00,-136.89) (  -0.81,-140.44)  405.30                80
 04/28/2025   22:29:55   (   0.00,-136.87) (   0.22,-135.91)  109.84                80
 04/30/2025   10:51:40   (  -0.01,-136.83) (   0.94,-141.17)  494.20                80
 05/01/2025   10:30:13   (  -0.01,-136.81) (  -0.03,-136.62)   20.49                80