Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 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)
 08/06/2017   10:26:58   (   0.34,-134.77) (   0.41,-135.02)   29.82                80
 08/07/2017   10:05:35   (   0.32,-134.79) (  -0.62,-130.50)  488.19                80
 08/08/2017   22:27:33   (  -0.34,-134.84) (  -0.54,-135.82)  110.79                80
 08/09/2017   22:11:28   (  -0.33,-134.86) (   0.44,-131.28)  407.92                80
 08/11/2017   10:33:18   (   0.35,-134.89) (   0.73,-136.55)  189.80                80
 08/12/2017   10:11:54   (   0.34,-134.90) (  -0.30,-132.03)  327.58                80
 08/13/2017   22:33:51   (  -0.36,-134.93) (  -0.90,-137.33)  273.97                80
 08/14/2017   22:17:48   (  -0.35,-134.95) (   0.13,-132.81)  243.81                80
 08/16/2017   10:39:37   (   0.36,-134.97) (   1.04,-138.09)  354.29                80
 08/17/2017   10:18:14   (   0.35,-134.98) (   0.01,-133.56)  162.09                80