Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 19.  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)
 04/20/2025   10:36:50   (   0.00,-136.98) (   0.31,-138.22)  142.12                80
 04/21/2025   10:20:37   (   0.00,-136.97) (  -0.71,-133.68)  374.34                73
 04/22/2025   22:39:57   (   0.00,-136.97) (  -0.47,-138.97)  229.20                80
 04/23/2025   22:23:50   (   0.00,-136.96) (   0.55,-134.44)  287.10                80
 04/25/2025   10:45:36   (  -0.00,-136.93) (   0.62,-139.70)  315.09                80
 04/26/2025   10:26:49   (   0.00,-136.92) (  -0.40,-135.16)  200.78                80
 04/27/2025   22:46:02   (  -0.00,-136.90) (  -0.82,-140.44)  403.86                80
 04/28/2025   22:29:55   (   0.00,-136.89) (   0.21,-135.91)  111.46                80
 04/30/2025   10:51:40   (  -0.00,-136.85) (   0.96,-141.17)  492.38                80
 05/01/2025   10:30:14   (  -0.01,-136.82) (  -0.07,-136.63)   22.39                80