Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 26.  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)
 12/27/2023   10:38:45   (  -0.01,-137.00) (   0.30,-138.46)  165.89                80
 12/28/2023   10:17:20   (  -0.00,-137.00) (  -0.67,-133.92)  350.66                80
 12/29/2023   22:39:16   (   0.00,-136.99) (  -0.49,-139.23)  254.96                80
 12/30/2023   22:23:11   (  -0.00,-136.99) (   0.49,-134.68)  261.57                80
 01/01/2024   10:44:59   (   0.00,-137.00) (   0.64,-139.96)  337.51                80
 01/02/2024   10:23:33   (   0.00,-136.99) (  -0.34,-135.42)  178.78                80
 01/03/2024   22:45:29   (  -0.00,-136.97) (  -0.86,-140.72)  427.50                80
 01/04/2024   22:29:24   (  -0.00,-136.96) (   0.18,-136.19)   88.47                80
 01/07/2024   10:29:46   (   0.00,-136.95) (   0.00,-136.92)    3.75                80