Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 26.  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)
 10/26/2023   22:38:32   (   0.00,-137.04) (  -0.44,-139.07)  231.50                80
 10/27/2023   22:22:28   (   0.00,-137.04) (   0.54,-134.54)  284.26                80
 10/29/2023   10:44:18   (  -0.00,-137.04) (   0.63,-139.82)  317.35                80
 10/30/2023   10:22:56   (  -0.00,-137.04) (  -0.41,-135.30)  197.90                80
 10/31/2023   22:44:54   (  -0.00,-137.02) (  -0.82,-140.61)  408.98                80
 11/01/2023   22:28:52   (  -0.00,-137.02) (   0.23,-136.09)  106.00                80
 11/03/2023   10:50:41   (   0.00,-137.01) (   1.00,-141.36)  496.69                80
 11/04/2023   10:31:59   (  -0.00,-137.00) (  -0.05,-136.84)   17.85                80
 11/06/2023   22:32:34   (   0.02,-136.97) (  -0.11,-137.64)   75.81                80
 11/07/2023   22:16:31   (   0.02,-136.96) (   0.88,-133.11)  438.66                80