Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 11.  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)
 03/11/2023   22:33:45   (  -0.02,-136.99) (  -0.15,-137.62)   71.51                80
 03/12/2023   22:17:40   (  -0.02,-136.99) (   0.85,-133.09)  444.20                80
 03/14/2023   10:39:26   (   0.03,-136.97) (   0.35,-138.35)  157.72                80
 03/15/2023   10:18:01   (   0.03,-136.96) (  -0.66,-133.82)  357.36                80
 03/16/2023   22:39:56   (  -0.04,-136.93) (  -0.51,-139.12)  249.80                80
 03/17/2023   22:23:51   (  -0.04,-136.91) (   0.51,-134.59)  265.01                80
 03/19/2023   10:45:36   (   0.04,-136.89) (   0.73,-139.85)  337.92                80
 03/20/2023   10:24:10   (   0.04,-136.87) (  -0.29,-135.31)  176.74                80
 03/21/2023   22:46:05   (  -0.04,-136.84) (  -0.91,-140.61)  430.87                80
 03/22/2023   22:29:59   (  -0.04,-136.82) (   0.12,-136.08)   83.72                80