Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 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)
 07/05/2023   10:17:02   (  -0.01,-137.01) (  -0.75,-133.77)  368.65                80
 07/06/2023   22:38:58   (   0.01,-137.00) (  -0.45,-139.07)  236.00                80
 07/07/2023   22:22:52   (   0.00,-137.00) (   0.56,-134.54)  280.71                80
 07/09/2023   10:44:39   (  -0.00,-137.00) (   0.64,-139.80)  319.36                80
 07/10/2023   10:23:13   (   0.00,-137.00) (  -0.36,-135.27)  196.97                80
 07/11/2023   22:45:08   (   0.00,-136.99) (  -0.83,-140.57)  408.75                80
 07/12/2023   22:29:04   (   0.01,-136.98) (   0.24,-136.05)  107.15                80
 07/14/2023   10:50:50   (  -0.02,-136.97) (   0.96,-141.31)  494.15                80
 07/15/2023   10:29:25   (  -0.01,-136.96) (  -0.05,-136.77)   21.28                80
 07/17/2023   22:32:35   (   0.01,-136.92) (  -0.11,-137.54)   70.29                80