Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 12.  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)
 04/12/2025   22:30:25   (   0.00,-137.00) (   0.19,-136.02)  110.79                80
 04/14/2025   10:49:30   (  -0.00,-136.98) (   0.99,-141.28)  490.36                80
 04/15/2025   10:33:25   (   0.00,-136.97) (  -0.07,-136.75)   25.99                80
 04/17/2025   22:33:51   (   0.00,-136.95) (  -0.12,-137.50)   62.78                80
 04/18/2025   22:17:45   (   0.00,-136.94) (   0.89,-132.96)  452.77                80
 04/20/2025   10:39:30   (  -0.00,-136.90) (   0.29,-138.22)  150.17                80
 04/21/2025   10:18:04   (  -0.00,-136.89) (  -0.73,-133.69)  365.03                80
 04/22/2025   22:39:56   (   0.00,-136.86) (  -0.50,-138.97)  240.65                80
 04/23/2025   22:23:50   (   0.00,-136.84) (   0.52,-134.43)  274.43                80
 04/25/2025   10:45:35   (  -0.00,-136.80) (   0.65,-139.69)  329.24                80
 04/26/2025   10:24:08   (  -0.00,-136.78) (  -0.38,-135.15)  185.37                80