Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 23.  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)
 01/23/2023   22:17:59   (   0.01,-136.91) (   0.90,-133.05)  440.21                80
 01/25/2023   10:37:05   (  -0.01,-136.90) (   0.30,-138.31)  161.50                80
 01/26/2023   10:21:00   (  -0.01,-136.89) (  -0.71,-133.78)  354.13                80
 01/27/2023   22:40:15   (   0.02,-136.87) (  -0.47,-139.09)  252.01                80
 01/28/2023   22:24:10   (   0.02,-136.86) (   0.54,-134.55)  263.36                80
 01/30/2023   10:43:16   (  -0.02,-136.85) (   0.64,-139.82)  339.18                80
 01/31/2023   10:27:11   (  -0.02,-136.83) (  -0.37,-135.29)  175.71                80
 02/01/2023   22:46:25   (   0.03,-136.80) (  -0.85,-140.58)  431.76                80
 02/02/2023   22:30:19   (   0.03,-136.78) (   0.18,-136.05)   82.84                80
 02/05/2023   10:30:40   (  -0.04,-136.73) (  -0.03,-136.79)    6.44                80