Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 5.  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)
 04/06/2023   22:45:46   (  -0.00,-137.00) (  -0.80,-140.58)  407.92                80
 04/07/2023   22:29:40   (  -0.00,-137.01) (   0.19,-136.04)  109.15                80
 04/09/2023   10:51:25   (   0.00,-137.01) (   0.99,-141.31)  490.42                80
 04/10/2023   10:30:00   (   0.00,-137.00) (  -0.07,-136.78)   26.00                80
 04/12/2023   22:33:06   (  -0.01,-136.97) (  -0.14,-137.53)   63.81                80
 04/13/2023   22:17:00   (  -0.01,-136.96) (   0.86,-132.99)  452.00                80
 04/15/2023   10:38:45   (   0.02,-136.95) (   0.31,-138.26)  149.07                80
 04/16/2023   10:17:19   (   0.02,-136.93) (  -0.70,-133.72)  366.53                80
 04/17/2023   22:39:12   (  -0.02,-136.91) (  -0.49,-139.01)  239.94                80
 04/18/2023   22:23:06   (  -0.02,-136.89) (   0.52,-134.47)  275.55                80