Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 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)
 09/16/2025   10:46:38   (  -0.02,-136.99) (   0.67,-139.96)  338.87                80
 09/17/2025   10:25:14   (  -0.02,-136.99) (  -0.39,-135.43)  178.08                80
 09/18/2025   22:47:08   (   0.02,-137.01) (  -0.83,-140.72)  423.77                80
 09/19/2025   22:31:03   (   0.02,-137.01) (   0.23,-136.20)   93.32                80
 09/22/2025   10:31:25   (  -0.02,-137.00) (  -0.06,-136.93)    9.14                80
 09/24/2025   22:34:34   (   0.02,-137.01) (  -0.15,-137.68)   77.39                80
 09/25/2025   22:18:30   (   0.02,-137.01) (   0.91,-133.16)  438.94                80
 09/27/2025   10:40:16   (  -0.02,-136.98) (   0.31,-138.42)  163.56                80
 09/28/2025   10:18:50   (  -0.02,-136.97) (  -0.70,-133.88)  352.11                80