Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 18.  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)
 07/20/2023   10:38:15   (   0.00,-137.00) (   0.29,-138.27)  144.47                80
 07/21/2023   10:16:50   (   0.00,-137.00) (  -0.73,-133.74)  372.29                80
 07/22/2023   22:38:45   (   0.00,-137.00) (  -0.43,-139.04)  231.87                80
 07/23/2023   22:22:40   (   0.00,-137.00) (   0.58,-134.51)  284.72                80
 07/25/2023   10:44:26   (  -0.00,-137.00) (   0.60,-139.78)  315.97                80
 07/26/2023   10:22:59   (   0.00,-136.99) (  -0.37,-135.23)  200.14                80
 07/27/2023   22:44:55   (  -0.00,-136.98) (  -0.78,-140.54)  405.40                80
 07/28/2023   22:28:48   (  -0.00,-136.96) (   0.18,-135.99)  110.08                80
 07/30/2023   10:47:55   (   0.00,-136.94) (   0.99,-141.26)  492.57                80
 07/31/2023   10:31:49   (   0.00,-136.92) (  -0.04,-136.73)   22.24                80