Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 15.  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   (   0.01,-137.00) (  -0.09,-137.51)   57.58                80
 04/18/2025   22:17:46   (   0.01,-136.99) (   0.92,-132.97)  459.09                80
 04/20/2025   10:39:31   (  -0.00,-136.98) (   0.25,-138.23)  142.18                80
 04/21/2025   10:18:04   (  -0.00,-136.97) (  -0.76,-133.69)  374.10                80
 04/22/2025   22:39:57   (  -0.00,-136.96) (  -0.47,-138.97)  230.01                80
 04/23/2025   22:23:50   (   0.00,-136.95) (   0.55,-134.44)  286.09                80
 04/25/2025   10:45:36   (  -0.00,-136.92) (   0.63,-139.70)  316.02                80
 04/26/2025   10:24:09   (   0.00,-136.91) (  -0.40,-135.16)  199.66                80
 04/27/2025   22:46:01   (  -0.00,-136.89) (  -0.81,-140.44)  405.55                80
 04/28/2025   22:29:55   (  -0.00,-136.87) (   0.22,-135.91)  109.65                80