Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 21.  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)
 12/21/2022   22:34:11   (  -0.02,-136.93) (  -0.12,-137.51)   65.50                80
 12/22/2022   22:18:05   (  -0.02,-136.93) (   0.84,-132.97)  450.46                80
 12/24/2022   10:39:54   (   0.02,-136.93) (   0.32,-138.25)  150.05                80
 12/25/2022   10:18:29   (   0.02,-136.93) (  -0.70,-133.72)  365.20                80
 12/26/2022   22:40:25   (  -0.01,-136.90) (  -0.50,-139.03)  242.94                80
 12/27/2022   22:24:21   (   0.01,-136.89) (   0.52,-134.50)  272.17                80
 12/29/2022   10:46:09   (  -0.01,-136.90) (   0.62,-139.78)  328.71                80
 12/30/2022   10:24:45   (  -0.02,-136.89) (  -0.40,-135.26)  186.35                80
 12/31/2022   22:46:40   (   0.01,-136.86) (  -0.85,-140.55)  421.94                80
 01/01/2023   22:30:36   (   0.01,-136.85) (   0.18,-136.03)   93.07                80