Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 7 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)
 07/08/2015   22:22:16   (   0.12,-134.98) (   0.57,-133.00)  225.54                80
 07/10/2015   10:41:23   (  -0.14,-135.01) (   0.56,-138.28)  371.83                80
 07/11/2015   10:25:17   (  -0.14,-135.03) (  -0.44,-133.75)  146.85                80
 07/12/2015   22:44:33   (   0.16,-135.05) (  -0.74,-139.05)  455.85                80
 07/13/2015   22:28:27   (   0.15,-135.07) (   0.26,-134.52)   62.39                80
 07/16/2015   10:28:49   (  -0.16,-135.11) (  -0.14,-135.27)   18.01                80
 07/18/2015   22:31:59   (   0.18,-135.14) (  -0.02,-136.04)  102.94                80
 07/19/2015   22:15:53   (   0.17,-135.15) (   1.00,-131.51)  414.90                80
 07/21/2015   10:35:00   (  -0.19,-135.16) (   0.19,-136.78)  184.56                80