Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 31.  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)
 01/31/2023   10:24:30   (   0.02,-137.01) (  -0.35,-135.28)  195.66                80
 02/01/2023   22:46:26   (  -0.02,-137.00) (  -0.82,-140.59)  409.52                80
 02/02/2023   22:27:40   (  -0.02,-136.99) (   0.20,-136.06)  106.68                80
 02/04/2023   10:52:07   (   0.03,-136.99) (   0.99,-141.33)  493.92                80
 02/05/2023   10:30:41   (   0.03,-136.98) (  -0.03,-136.79)   22.04                80
 02/07/2023   22:36:30   (  -0.03,-136.96) (  -0.17,-137.56)   68.31                80
 02/08/2023   22:15:04   (  -0.03,-136.95) (   0.85,-133.03)  447.27                80
 02/10/2023   10:39:31   (   0.04,-136.94) (   0.33,-138.29)  154.22                80
 02/11/2023   10:18:05   (   0.03,-136.93) (  -0.70,-133.76)  360.94                80
 02/12/2023   22:42:40   (  -0.04,-136.90) (  -0.51,-139.06)  246.35                80
 02/13/2023   22:21:14   (  -0.04,-136.88) (   0.51,-134.53)  268.27                80