Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 9.  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)
 04/10/2023   10:30:00   (  -0.00,-137.01) (  -0.08,-136.78)   26.30                80
 04/12/2023   22:33:07   (  -0.00,-137.00) (  -0.13,-137.53)   61.21                80
 04/13/2023   22:17:00   (  -0.01,-137.00) (   0.87,-132.99)  455.69                80
 04/15/2023   10:36:05   (   0.01,-137.00) (   0.30,-138.26)  143.60                80
 04/16/2023   10:19:59   (   0.02,-136.99) (  -0.71,-133.72)  373.15                80
 04/17/2023   22:39:12   (  -0.02,-136.98) (  -0.49,-139.01)  231.97                80
 04/18/2023   22:23:07   (   0.02,-136.98) (   0.59,-134.49)  283.81                80
 04/20/2023   10:42:12   (  -0.03,-136.97) (   0.57,-139.75)  316.10                80
 04/21/2023   10:26:06   (  -0.02,-136.97) (  -0.44,-135.22)  200.14                80
 04/22/2023   22:45:18   (   0.03,-136.94) (  -0.80,-140.50)  406.12                80