Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/24/2020   22:21:03   (  -0.01,-137.19) (   0.61,-134.47)  310.81                80
 06/26/2020   10:45:31   (   0.01,-137.19) (   0.57,-139.73)  289.57                80
 06/27/2020   10:24:05   (   0.01,-137.18) (  -0.42,-135.19)  226.47                80
 06/28/2020   22:48:42   (  -0.02,-137.17) (  -0.73,-140.50)  379.02                80
 06/29/2020   22:27:16   (  -0.01,-137.16) (   0.25,-135.96)  136.58                80
 07/01/2020   10:51:43   (   0.01,-137.15) (   0.92,-141.23)  465.12                80
 07/02/2020   10:30:19   (  -0.00,-137.13) (  -0.12,-136.70)   49.97                80
 07/04/2020   22:33:29   (   0.01,-137.09) (  -0.10,-137.46)   42.38                80
 07/05/2020   22:17:24   (   0.01,-137.07) (   0.95,-132.93)  472.49                80
 07/07/2020   10:36:32   (  -0.01,-137.05) (   0.23,-138.20)  130.28                80