Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 19.  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)
 01/20/2023   10:30:53   (   0.01,-136.93) (  -0.01,-136.80)   15.03                80
 01/22/2023   22:34:04   (  -0.01,-136.91) (  -0.13,-137.58)   75.71                80
 01/23/2023   22:17:59   (  -0.01,-136.90) (   0.87,-133.04)  439.82                80
 01/25/2023   10:39:45   (   0.01,-136.89) (   0.32,-138.31)  162.14                80
 01/26/2023   10:18:19   (   0.00,-136.88) (  -0.69,-133.78)  353.20                80
 01/27/2023   22:40:15   (  -0.00,-136.86) (  -0.49,-139.08)  253.23                80
 01/28/2023   22:24:09   (  -0.00,-136.85) (   0.53,-134.55)  261.96                80
 01/30/2023   10:45:56   (   0.01,-136.82) (   0.66,-139.82)  340.62                80
 01/31/2023   10:24:30   (   0.01,-136.81) (  -0.36,-135.29)  174.15                80
 02/01/2023   22:46:24   (  -0.01,-136.78) (  -0.85,-140.58)  433.50                80