Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 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)
 09/17/2025   10:25:14   (  -0.03,-136.99) (  -0.40,-135.44)  178.00                80
 09/18/2025   22:47:08   (   0.02,-137.01) (  -0.82,-140.72)  423.98                80
 09/19/2025   22:31:03   (   0.02,-137.01) (   0.18,-136.19)   93.05                80
 09/22/2025   10:31:26   (  -0.02,-137.00) (  -0.07,-136.93)    8.98                80
 09/24/2025   22:34:34   (   0.03,-137.01) (  -0.15,-137.69)   77.96                80
 09/25/2025   22:18:29   (   0.03,-137.00) (   0.86,-133.15)  438.27                80
 09/27/2025   10:40:16   (  -0.02,-136.98) (   0.31,-138.42)  164.36                80
 09/28/2025   10:18:51   (  -0.02,-136.97) (  -0.70,-133.88)  351.22                80
 09/29/2025   22:40:46   (   0.02,-136.96) (  -0.45,-139.19)  253.27                80