Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 18.  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)
 09/18/2025   22:47:09   (   0.02,-137.01) (  -0.80,-140.73)  423.89                80
 09/19/2025   22:31:03   (   0.02,-137.01) (   0.20,-136.19)   93.09                80
 09/22/2025   10:31:25   (  -0.01,-137.00) (  -0.03,-136.92)    8.50                80
 09/24/2025   22:34:35   (   0.01,-137.00) (  -0.12,-137.69)   77.97                80
 09/25/2025   22:18:29   (   0.00,-137.00) (   0.88,-133.15)  438.40                80
 09/27/2025   10:40:16   (   0.01,-136.97) (   0.34,-138.41)  164.17                80
 09/28/2025   10:18:50   (   0.01,-136.96) (  -0.67,-133.88)  351.29                80
 09/29/2025   22:40:45   (  -0.01,-136.95) (  -0.49,-139.18)  253.39                80
 09/30/2025   22:24:40   (  -0.00,-136.94) (   0.52,-134.64)  261.72                80