Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 16.  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)
 04/17/2025   22:33:52   (   0.00,-137.00) (  -0.09,-137.51)   57.54                80
 04/18/2025   22:17:45   (   0.00,-136.99) (   0.93,-132.97)  459.15                80
 04/20/2025   10:39:30   (  -0.00,-136.98) (   0.30,-138.22)  142.17                80
 04/21/2025   10:18:03   (   0.00,-136.97) (  -0.72,-133.68)  374.10                80
 04/22/2025   22:39:57   (   0.00,-136.96) (  -0.43,-138.98)  229.97                80
 04/23/2025   22:23:49   (   0.00,-136.95) (   0.54,-134.43)  286.17                80
 04/25/2025   10:45:34   (  -0.00,-136.92) (   0.61,-139.69)  315.89                80
 04/26/2025   10:26:47   (  -0.00,-136.90) (  -0.37,-135.15)  199.91                80
 04/27/2025   22:45:59   (   0.00,-136.88) (  -0.82,-140.43)  405.17                80
 04/28/2025   22:29:53   (  -0.00,-136.86) (   0.23,-135.90)  110.12                80
 04/30/2025   10:48:57   (   0.00,-136.82) (   0.97,-141.15)  493.42                80