Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2017   22:39:58   (   0.11,-135.46) (  -0.67,-138.93)  395.44                80
 07/02/2017   22:23:52   (   0.10,-135.46) (   0.31,-134.39)  121.00                80
 07/04/2017   10:43:01   (  -0.12,-135.42) (   0.80,-139.67)  484.25                80
 07/05/2017   10:26:55   (  -0.11,-135.41) (  -0.17,-135.13)   31.53                80
 07/07/2017   22:27:27   (   0.13,-135.41) (   0.02,-135.91)   56.21                80
 07/08/2017   22:11:22   (   0.12,-135.40) (   1.00,-131.37)  459.26                80
 07/10/2017   10:30:29   (  -0.14,-135.35) (   0.17,-136.63)  147.21                80
 07/11/2017   10:14:24   (  -0.13,-135.33) (  -0.87,-132.11)  367.74                80
 07/12/2017   22:33:41   (   0.16,-135.33) (  -0.31,-137.41)  237.15                80
 07/13/2017   22:17:35   (   0.15,-135.31) (   0.67,-132.87)  277.72                80