Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 17.  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)
 01/17/2023   22:30:32   (  -0.01,-136.94) (   0.18,-136.06)  100.51                80
 01/20/2023   10:30:53   (   0.01,-136.93) (  -0.01,-136.80)   14.92                80
 01/22/2023   22:34:03   (  -0.01,-136.91) (  -0.19,-137.57)   75.80                80
 01/23/2023   22:17:59   (  -0.01,-136.90) (   0.87,-133.05)  439.70                80
 01/25/2023   10:39:45   (   0.01,-136.89) (   0.33,-138.31)  162.30                80
 01/26/2023   10:18:20   (   0.00,-136.88) (  -0.67,-133.78)  353.01                80
 01/27/2023   22:40:15   (  -0.00,-136.86) (  -0.50,-139.08)  253.46                80
 01/28/2023   22:24:10   (  -0.00,-136.85) (   0.51,-134.55)  261.69                80
 01/30/2023   10:45:56   (   0.01,-136.82) (   0.69,-139.81)  340.95                80
 01/31/2023   10:24:30   (   0.01,-136.81) (  -0.33,-135.28)  173.74                80