Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 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)
 12/24/2022   10:39:54   (   0.02,-136.93) (   0.28,-138.26)  150.05                80
 12/25/2022   10:18:29   (   0.02,-136.93) (  -0.67,-133.72)  365.26                80
 12/26/2022   22:40:26   (  -0.01,-136.90) (  -0.46,-139.04)  242.90                80
 12/27/2022   22:24:22   (   0.01,-136.89) (   0.56,-134.51)  272.21                80
 12/29/2022   10:46:09   (  -0.01,-136.90) (   0.65,-139.78)  328.67                80
 12/30/2022   10:24:44   (  -0.02,-136.89) (  -0.37,-135.25)  186.39                80
 12/31/2022   22:46:41   (   0.01,-136.86) (  -0.82,-140.56)  421.90                80
 01/01/2023   22:30:36   (   0.01,-136.85) (   0.21,-136.03)   93.10                80
 01/04/2023   10:30:59   (   0.01,-136.83) (  -0.03,-136.78)    6.98                80