Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2020   22:36:30   (  -0.01,-137.19) (  -0.07,-137.53)   37.79                80
 07/21/2020   22:15:05   (  -0.01,-137.20) (   0.92,-132.99)  479.13                80
 07/23/2020   10:39:33   (   0.01,-137.21) (   0.27,-138.26)  120.77                80
 07/24/2020   10:18:10   (   0.01,-137.21) (  -0.78,-133.74)  395.80                80
 07/25/2020   22:42:47   (  -0.01,-137.21) (  -0.40,-139.05)  208.74                80
 07/26/2020   22:21:23   (  -0.01,-137.21) (   0.59,-134.51)  307.53                80
 07/28/2020   10:45:51   (   0.02,-137.21) (   0.60,-139.78)  293.35                80
 07/29/2020   10:24:27   (   0.02,-137.20) (  -0.39,-135.25)  222.51                80
 07/30/2020   22:46:24   (  -0.03,-137.19) (  -0.79,-140.55)  383.24                80
 07/31/2020   22:30:20   (  -0.03,-137.19) (   0.26,-136.03)  132.26                80
 08/02/2020   10:49:28   (   0.03,-137.17) (   0.99,-141.29)  469.81                80
 08/03/2020   10:33:24   (   0.04,-137.16) (  -0.06,-136.77)   45.42                80