Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 2 10.  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)
 02/11/2023   10:18:05   (   0.01,-137.00) (  -0.70,-133.76)  368.62                80
 02/12/2023   22:39:59   (  -0.01,-136.99) (  -0.50,-139.06)  235.92                80
 02/13/2023   22:23:54   (  -0.01,-136.99) (   0.54,-134.53)  280.10                80
 02/15/2023   10:45:39   (   0.02,-136.97) (   0.66,-139.79)  321.73                80
 02/16/2023   10:24:13   (   0.02,-136.96) (  -0.38,-135.26)  193.64                80
 02/17/2023   22:46:07   (  -0.02,-136.93) (  -0.86,-140.55)  412.62                80
 02/18/2023   22:27:21   (  -0.02,-136.92) (   0.19,-136.02)  102.52                80
 02/21/2023   10:30:20   (   0.02,-136.88) (   0.00,-136.74)   14.94                80
 02/23/2023   22:36:08   (  -0.02,-136.83) (  -0.16,-137.51)   76.74                80