Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 7 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2015   10:28:49   (  -0.17,-135.09) (  -0.12,-135.26)   19.94                80
 07/17/2015   10:12:43   (  -0.16,-135.10) (  -1.13,-130.73)  497.83                80
 07/18/2015   22:31:59   (   0.18,-135.12) (  -0.05,-136.03)  105.23                80
 07/19/2015   22:15:53   (   0.17,-135.12) (   0.96,-131.50)  412.20                80
 07/21/2015   10:35:00   (  -0.19,-135.12) (   0.18,-136.78)  188.62                80
 07/22/2015   10:18:55   (  -0.18,-135.13) (  -0.83,-132.25)  328.65                80
 07/23/2015   22:38:10   (   0.20,-135.14) (  -0.34,-137.56)  274.91                80
 07/24/2015   22:22:05   (   0.19,-135.14) (   0.67,-133.02)  241.74                80
 07/26/2015   10:41:12   (  -0.21,-135.13) (   0.47,-138.30)  360.85                80
 07/27/2015   10:25:06   (  -0.21,-135.13) (  -0.49,-133.76)  155.47                80
 07/28/2015   22:44:21   (   0.23,-135.13) (  -0.68,-139.07)  449.17                80
 07/29/2015   22:28:15   (   0.22,-135.12) (   0.34,-134.53)   66.50                80