Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 21.  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)
 04/22/2023   22:45:18   (  -0.00,-136.99) (  -0.78,-140.50)  399.80                80
 04/23/2023   22:29:11   (  -0.00,-136.98) (   0.24,-135.96)  116.79                80
 04/25/2023   10:48:15   (  -0.00,-136.99) (   0.95,-141.22)  482.48                80
 04/26/2023   10:32:09   (  -0.00,-136.98) (  -0.08,-136.68)   33.78                80
 04/28/2023   22:35:15   (   0.00,-136.94) (  -0.12,-137.43)   56.38                80
 04/29/2023   22:13:48   (  -0.00,-136.93) (   0.92,-132.90)  459.67                80
 05/01/2023   10:35:33   (   0.00,-136.92) (   0.26,-138.15)  140.28                80
 05/02/2023   10:16:45   (  -0.00,-136.91) (  -0.72,-133.61)  375.48                80
 05/03/2023   22:41:18   (   0.01,-136.87) (  -0.44,-138.91)  231.73                80
 05/04/2023   22:19:51   (   0.01,-136.85) (   0.55,-134.36)  283.46                80