Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 29.  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)
 09/29/2025   22:43:25   (   0.00,-137.00) (  -0.46,-139.18)  248.01                80
 09/30/2025   22:22:00   (   0.01,-137.00) (   0.56,-134.64)  268.98                80
 10/02/2025   10:46:26   (  -0.02,-137.00) (   0.63,-139.90)  331.22                80
 10/03/2025   10:25:00   (  -0.02,-137.00) (  -0.40,-135.37)  185.49                80
 10/04/2025   22:46:55   (   0.01,-136.99) (  -0.80,-140.66)  418.00                80
 10/05/2025   22:30:49   (   0.01,-136.99) (   0.23,-136.13)   98.82                80
 10/08/2025   10:33:49   (   0.02,-136.97) (  -0.04,-136.85)   14.95                80
 10/10/2025   22:34:17   (  -0.03,-136.94) (  -0.17,-137.60)   74.86                80
 10/11/2025   22:18:11   (  -0.03,-136.93) (   0.87,-133.07)  440.40                80
 10/13/2025   10:39:57   (   0.03,-136.90) (   0.33,-138.32)  162.16                80