Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 30.  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)
 12/31/2022   22:46:41   (  -0.02,-136.92) (  -0.82,-140.56)  414.33                80
 01/01/2023   22:30:36   (  -0.02,-136.92) (   0.20,-136.03)  101.52                80
 01/03/2023   10:52:23   (   0.02,-136.93) (   1.00,-141.30)  498.84                80
 01/04/2023   10:30:59   (   0.02,-136.92) (  -0.03,-136.78)   16.48                80
 01/06/2023   22:34:10   (  -0.02,-136.88) (  -0.18,-137.55)   76.90                80
 01/07/2023   22:18:05   (  -0.01,-136.86) (   0.85,-133.02)  437.95                80
 01/09/2023   10:39:53   (   0.01,-136.86) (   0.34,-138.29)  163.60                80
 01/10/2023   10:18:28   (   0.01,-136.84) (  -0.69,-133.77)  350.86                80
 01/11/2023   22:40:23   (  -0.00,-136.80) (  -0.53,-139.07)  258.43                80
 01/12/2023   22:24:19   (   0.00,-136.79) (   0.51,-134.54)  255.96                80