Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2017   22:23:49   (   0.18,-135.19) (   0.37,-134.38)   92.64                80
 07/21/2017   10:24:11   (  -0.19,-135.07) (  -0.19,-135.10)    3.87                80
 07/23/2017   22:27:22   (   0.21,-135.02) (  -0.01,-135.87)   96.71                80
 07/24/2017   22:11:18   (   0.20,-134.99) (   1.03,-131.34)  416.70                80
 07/26/2017   10:30:25   (  -0.22,-134.90) (   0.13,-136.61)  193.63                80
 07/27/2017   10:14:19   (  -0.21,-134.87) (  -0.85,-132.07)  319.34                80
 07/28/2017   22:33:36   (   0.23,-134.85) (  -0.31,-137.37)  287.64                80
 07/29/2017   22:17:30   (   0.22,-134.81) (   0.67,-132.83)  225.41                80
 07/31/2017   10:36:38   (  -0.25,-134.72) (   0.50,-138.10)  384.95                80