Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 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)
 10/27/2023   22:22:29   (   0.00,-137.04) (   0.59,-134.55)  284.16                80
 10/29/2023   10:44:18   (  -0.00,-137.03) (   0.64,-139.82)  317.81                80
 10/30/2023   10:22:56   (  -0.00,-137.03) (  -0.40,-135.30)  197.34                80
 10/31/2023   22:44:54   (   0.00,-137.02) (  -0.83,-140.61)  409.46                80
 11/01/2023   22:28:52   (  -0.00,-137.01) (   0.22,-136.09)  105.44                80
 11/03/2023   10:50:41   (   0.00,-137.00) (   1.00,-141.36)  497.50                80
 11/04/2023   10:29:18   (   0.01,-136.99) (  -0.05,-136.84)   17.27                80
 11/06/2023   22:32:34   (   0.02,-136.96) (  -0.11,-137.64)   76.72                80
 11/07/2023   22:16:31   (   0.02,-136.95) (   0.89,-133.11)  437.71                80
 11/09/2023   10:38:20   (  -0.02,-136.93) (   0.32,-138.38)  165.95                80