Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 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)
 07/02/2015   22:32:09   (   0.11,-134.84) (  -0.15,-136.01)  133.61                80
 07/03/2015   22:16:03   (   0.10,-134.86) (   0.85,-131.47)  385.65                80
 07/05/2015   10:35:10   (  -0.12,-134.91) (   0.29,-136.75)  210.01                80
 07/06/2015   10:19:05   (  -0.11,-134.93) (  -0.71,-132.22)  309.13                80
 07/07/2015   22:38:21   (   0.13,-134.95) (  -0.43,-137.54)  293.93                80
 07/08/2015   22:22:16   (   0.12,-134.97) (   0.57,-133.00)  224.71                80
 07/10/2015   10:41:23   (  -0.14,-135.01) (   0.57,-138.28)  372.41                80
 07/11/2015   10:25:18   (  -0.14,-135.03) (  -0.44,-133.75)  146.02                80
 07/12/2015   22:44:33   (   0.16,-135.04) (  -0.76,-139.05)  457.72                80
 07/13/2015   22:28:27   (   0.15,-135.05) (   0.25,-134.52)   60.26                80