Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 3.  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)
 03/04/2023   10:24:21   (   0.03,-136.98) (  -0.31,-135.32)  187.96                80
 03/05/2023   22:48:58   (  -0.03,-136.97) (  -0.86,-140.64)  417.38                80
 03/06/2023   22:27:33   (  -0.03,-136.97) (   0.18,-136.11)   99.02                80
 03/09/2023   10:30:35   (   0.03,-136.98) (   0.00,-136.85)   15.07                80
 03/11/2023   22:33:46   (  -0.04,-136.95) (  -0.16,-137.62)   75.72                80
 03/12/2023   22:15:00   (  -0.04,-136.94) (   0.84,-133.09)  439.70                80
 03/14/2023   10:39:27   (   0.04,-136.93) (   0.38,-138.35)  162.06                80
 03/15/2023   10:18:01   (   0.04,-136.92) (  -0.62,-133.81)  352.67                80
 03/16/2023   22:39:56   (  -0.05,-136.88) (  -0.56,-139.12)  255.67                80