Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/02/2017   22:23:53   (   0.10,-135.46) (   0.35,-134.40)  120.91                80
 07/04/2017   10:43:00   (  -0.12,-135.42) (   0.82,-139.67)  484.38                80
 07/05/2017   10:26:55   (  -0.11,-135.41) (  -0.16,-135.13)   31.41                80
 07/07/2017   22:27:27   (   0.13,-135.41) (   0.01,-135.90)   56.56                80
 07/08/2017   22:11:22   (   0.12,-135.40) (   1.04,-131.38)  458.88                80
 07/10/2017   10:30:30   (  -0.14,-135.34) (   0.12,-136.64)  147.64                80
 07/11/2017   10:14:24   (  -0.13,-135.33) (  -0.85,-132.10)  367.24                80
 07/12/2017   22:33:40   (   0.16,-135.32) (  -0.33,-137.41)  237.75                80
 07/13/2017   22:17:36   (   0.15,-135.31) (   0.71,-132.88)  277.08                80
 07/15/2017   10:36:43   (  -0.17,-135.25) (   0.46,-138.15)  330.00                80