Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 27.  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)
 01/27/2023   22:42:55   (  -0.00,-136.99) (  -0.50,-139.08)  238.62                80
 01/28/2023   22:21:29   (  -0.01,-137.00) (   0.51,-134.55)  278.69                80
 01/30/2023   10:45:57   (   0.01,-137.01) (   0.62,-139.83)  320.60                80
 01/31/2023   10:24:31   (   0.01,-137.01) (  -0.40,-135.30)  196.15                80
 02/01/2023   22:46:26   (  -0.00,-137.01) (  -0.83,-140.59)  408.71                80
 02/02/2023   22:30:20   (   0.00,-137.01) (   0.19,-136.06)  107.72                80
 02/04/2023   10:49:26   (  -0.00,-137.01) (   0.99,-141.33)  492.73                80
 02/05/2023   10:33:21   (  -0.00,-137.00) (  -0.03,-136.79)   23.53                80
 02/07/2023   22:33:50   (   0.00,-136.99) (  -0.15,-137.56)   65.94                80
 02/08/2023   22:17:44   (   0.00,-136.98) (   0.88,-133.03)  450.08                80