Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 9.  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)
 07/09/2023   10:44:39   (   0.00,-136.99) (   0.64,-139.80)  319.98                80
 07/10/2023   10:23:13   (   0.01,-136.99) (  -0.37,-135.27)  196.13                80
 07/11/2023   22:45:08   (  -0.01,-136.98) (  -0.82,-140.57)  408.87                80
 07/12/2023   22:29:03   (  -0.01,-136.97) (   0.19,-136.03)  106.97                80
 07/14/2023   10:50:49   (   0.02,-136.96) (   1.00,-141.30)  494.99                80
 07/15/2023   10:29:24   (   0.02,-136.94) (  -0.01,-136.76)   20.36                80
 07/17/2023   22:32:34   (  -0.03,-136.91) (  -0.15,-137.53)   70.83                80
 07/18/2023   22:16:27   (  -0.03,-136.89) (   0.81,-132.99)  444.29                80
 07/20/2023   10:38:14   (   0.03,-136.87) (   0.32,-138.27)  158.71                80
 07/21/2023   10:16:48   (   0.03,-136.85) (  -0.64,-133.72)  356.11                80
 07/22/2023   22:38:43   (  -0.03,-136.82) (  -0.51,-139.03)  250.96                80