Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 5.  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) (   0.39,-135.03)   29.93                80
 08/07/2017   10:05:35   (   0.32,-134.79) (  -0.64,-130.50)  488.00                80
 08/08/2017   22:27:32   (  -0.34,-134.84) (  -0.57,-135.81)  110.58                80
 08/09/2017   22:11:29   (  -0.33,-134.87) (   0.46,-131.28)  408.11                80
 08/11/2017   10:33:18   (   0.35,-134.89) (   0.71,-136.56)  189.93                80
 08/12/2017   10:11:55   (   0.34,-134.90) (  -0.32,-132.03)  327.44                80
 08/13/2017   22:33:52   (  -0.36,-134.93) (  -0.88,-137.34)  273.87                80
 08/14/2017   22:17:48   (  -0.35,-134.95) (   0.15,-132.81)  243.95                80
 08/16/2017   10:39:37   (   0.36,-134.97) (   1.08,-138.08)  354.38                80
 08/17/2017   10:18:13   (   0.35,-134.98) (   0.05,-133.55)  161.96                80
 08/18/2017   22:40:10   (  -0.36,-134.98) (  -1.24,-138.86)  442.44                80