Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 4.  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)
 01/06/2023   22:34:10   (   0.02,-136.87) (  -0.15,-137.55)   78.44                80
 01/07/2023   22:18:06   (   0.02,-136.86) (   0.88,-133.03)  436.34                80
 01/09/2023   10:39:53   (  -0.03,-136.85) (   0.31,-138.30)  165.47                80
 01/10/2023   10:18:29   (  -0.03,-136.83) (  -0.73,-133.77)  349.01                80
 01/11/2023   22:40:24   (   0.03,-136.79) (  -0.50,-139.07)  260.43                80
 01/12/2023   22:24:19   (   0.03,-136.78) (   0.54,-134.55)  253.98                80
 01/14/2023   10:46:07   (  -0.04,-136.76) (   0.65,-139.82)  348.35                80
 01/15/2023   10:24:41   (  -0.04,-136.74) (  -0.33,-135.28)  165.51                80
 01/16/2023   22:46:37   (   0.04,-136.68) (  -0.83,-140.60)  445.51                80
 01/17/2023   22:30:32   (   0.05,-136.66) (   0.16,-136.06)   67.77                80