Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 3.  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)   29.81                80
 08/07/2017   10:05:35   (   0.32,-134.79) (  -0.64,-130.51)  488.16                80
 08/08/2017   22:27:32   (  -0.34,-134.84) (  -0.57,-135.81)  110.77                80
 08/09/2017   22:11:29   (  -0.33,-134.86) (   0.46,-131.28)  407.89                80
 08/11/2017   10:33:18   (   0.35,-134.89) (   0.71,-136.56)  189.83                80
 08/12/2017   10:11:55   (   0.34,-134.90) (  -0.33,-132.04)  327.58                80
 08/13/2017   22:33:52   (  -0.36,-134.93) (  -0.88,-137.34)  273.98                80
 08/14/2017   22:17:48   (  -0.35,-134.95) (   0.16,-132.82)  243.83                80
 08/16/2017   10:39:37   (   0.36,-134.97) (   1.07,-138.08)  354.28                80
 08/17/2017   10:18:13   (   0.35,-134.98) (   0.04,-133.55)  162.09                80