Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 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)
 09/13/2025   22:40:57   (   0.03,-137.00) (  -0.47,-139.23)  254.48                80
 09/14/2025   22:24:51   (   0.03,-136.99) (   0.53,-134.70)  261.35                80
 09/16/2025   10:46:38   (  -0.03,-136.96) (   0.65,-139.96)  342.17                80
 09/17/2025   10:25:14   (  -0.03,-136.95) (  -0.40,-135.44)  173.47                80
 09/18/2025   22:47:08   (   0.03,-136.95) (  -0.82,-140.73)  430.23                80
 09/19/2025   22:31:03   (   0.04,-136.95) (   0.18,-136.19)   85.53                80
 09/22/2025   10:34:05   (  -0.04,-136.91) (  -0.00,-136.92)    4.06                80
 09/24/2025   22:34:34   (   0.04,-136.88) (  -0.16,-137.69)   91.71                80
 09/25/2025   22:18:29   (   0.04,-136.87) (   0.85,-133.15)  423.23                80