Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 8 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/04/2015   22:15:40   (   0.23,-135.05) (   1.03,-131.51)  403.31                80
 08/06/2015   10:34:47   (  -0.25,-135.00) (   0.16,-136.78)  203.05                80
 08/07/2015   10:18:41   (  -0.25,-134.98) (  -0.86,-132.24)  311.61                80
 08/08/2015   22:37:56   (   0.26,-134.97) (  -0.29,-137.56)  293.96                80
 08/09/2015   22:21:50   (   0.26,-134.95) (   0.67,-133.01)  220.27                80
 08/11/2015   10:40:57   (  -0.28,-134.89) (   0.46,-138.29)  387.29                80
 08/12/2015   10:24:51   (  -0.27,-134.86) (  -0.51,-133.75)  126.85                80
 08/13/2015   22:44:06   (   0.29,-134.85) (  -0.63,-139.06)  479.03                80
 08/14/2015   22:28:00   (   0.28,-134.83) (   0.33,-134.52)   34.90                80
 08/17/2015   10:28:20   (  -0.29,-134.73) (  -0.17,-135.25)   59.58                80