Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2024 9 20.  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)
 09/21/2024   22:34:31   (   0.01,-137.00) (  -0.08,-137.53)   60.11                80
 09/22/2024   22:18:28   (   0.02,-136.99) (   0.93,-133.00)  454.88                80
 09/24/2024   10:40:19   (  -0.00,-136.97) (   0.30,-138.27)  148.80                80
 09/25/2024   10:18:56   (  -0.01,-136.96) (  -0.72,-133.75)  365.73                80
 09/26/2024   22:40:56   (   0.01,-136.95) (  -0.46,-139.06)  240.46                80
 09/27/2024   22:24:53   (   0.02,-136.94) (   0.57,-134.54)  273.99                80
 09/29/2024   10:46:43   (  -0.02,-136.91) (   0.64,-139.81)  330.10                80
 09/30/2024   10:28:01   (  -0.01,-136.90) (  -0.40,-135.28)  184.60                80
 10/01/2024   22:47:19   (   0.01,-136.89) (  -0.83,-140.59)  421.68                80
 10/02/2024   22:31:17   (   0.00,-136.87) (   0.21,-136.07)   92.86                80