Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 7 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/05/2015   10:35:10   (  -0.12,-134.91) (   0.31,-136.75)  210.44                80
 07/06/2015   10:19:04   (  -0.11,-134.93) (  -0.69,-132.21)  308.84                80
 07/07/2015   22:38:21   (   0.13,-134.95) (  -0.45,-137.53)  294.23                80
 07/08/2015   22:22:15   (   0.12,-134.97) (   0.56,-133.00)  224.59                80
 07/10/2015   10:41:23   (  -0.14,-135.01) (   0.58,-138.28)  371.96                80
 07/11/2015   10:25:17   (  -0.14,-135.03) (  -0.43,-133.74)  146.59                80
 07/12/2015   22:44:32   (   0.16,-135.04) (  -0.76,-139.05)  457.25                80
 07/13/2015   22:28:27   (   0.15,-135.06) (   0.24,-134.52)   60.95                80
 07/16/2015   10:28:49   (  -0.16,-135.10) (  -0.12,-135.26)   18.78                80
 07/17/2015   10:12:43   (  -0.15,-135.11) (  -1.12,-130.73)  499.27                80