Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/08/2017   22:27:32   (  -0.34,-134.84) (  -0.57,-135.81)  109.96                80
 08/09/2017   22:11:29   (  -0.33,-134.87) (   0.46,-131.28)  408.85                80
 08/11/2017   10:33:18   (   0.35,-134.89) (   0.71,-136.56)  189.58                80
 08/12/2017   10:11:55   (   0.34,-134.91) (  -0.32,-132.03)  327.89                80
 08/13/2017   22:33:52   (  -0.36,-134.94) (  -0.88,-137.34)  272.70                80
 08/14/2017   22:17:48   (  -0.35,-134.96) (   0.15,-132.81)  245.23                80
 08/16/2017   10:39:37   (   0.36,-134.98) (   1.07,-138.08)  353.45                80
 08/17/2017   10:18:13   (   0.35,-134.98) (   0.04,-133.55)  162.98                80
 08/18/2017   22:40:10   (  -0.36,-134.99) (  -1.24,-138.86)  440.73                80
 08/19/2017   22:24:07   (  -0.35,-135.00) (  -0.20,-134.33)   76.40                80
 08/22/2017   10:27:13   (   0.35,-135.03) (   0.34,-135.08)    6.06                80