Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 1.  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)
 03/01/2023   22:24:00   (   0.01,-137.00) (   0.57,-134.60)  273.74                80
 03/03/2023   10:45:48   (  -0.02,-137.01) (   0.62,-139.87)  326.34                80
 03/04/2023   10:27:03   (  -0.02,-137.01) (  -0.42,-135.35)  189.64                80
 03/05/2023   22:46:18   (   0.03,-136.99) (  -0.81,-140.65)  417.03                80
 03/06/2023   22:30:14   (   0.03,-136.99) (   0.23,-136.12)   98.85                80
 03/09/2023   10:33:16   (  -0.03,-136.98) (  -0.05,-136.86)   13.98                80
 03/11/2023   22:33:47   (   0.03,-136.94) (  -0.11,-137.64)   78.40                80
 03/12/2023   22:17:41   (   0.03,-136.93) (   0.88,-133.10)  436.47                80
 03/14/2023   10:36:48   (  -0.03,-136.91) (   0.28,-138.37)  166.03                80