Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 22.  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   22:45:17   (  -0.00,-136.99) (  -0.81,-140.49)  399.79                80
 04/23/2023   22:29:11   (  -0.00,-136.98) (   0.22,-135.96)  116.79                80
 04/25/2023   10:48:16   (  -0.00,-136.99) (   0.92,-141.22)  482.48                80
 04/26/2023   10:32:09   (  -0.00,-136.98) (  -0.05,-136.68)   33.83                80
 04/28/2023   22:35:15   (   0.00,-136.94) (  -0.09,-137.44)   56.44                80
 04/29/2023   22:13:48   (  -0.00,-136.93) (   0.89,-132.89)  459.64                80
 05/01/2023   10:38:12   (   0.00,-136.92) (   0.30,-138.15)  140.33                80
 05/02/2023   10:16:46   (  -0.00,-136.91) (  -0.74,-133.61)  375.42                80
 05/03/2023   22:41:18   (   0.01,-136.87) (  -0.47,-138.90)  231.83                80
 05/04/2023   22:19:52   (   0.01,-136.85) (   0.57,-134.37)  283.35                80
 05/06/2023   10:41:36   (  -0.02,-136.83) (   0.60,-139.63)  318.28                80