Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 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)
 07/18/2015   22:31:59   (   0.18,-135.11) (  -0.04,-136.04)  105.42                80
 07/19/2015   22:15:53   (   0.17,-135.12) (   0.97,-131.50)  411.89                80
 07/21/2015   10:35:01   (  -0.19,-135.12) (   0.16,-136.78)  188.97                80
 07/22/2015   10:18:55   (  -0.18,-135.13) (  -0.85,-132.25)  328.23                80
 07/23/2015   22:38:10   (   0.20,-135.14) (  -0.33,-137.56)  275.57                80
 07/24/2015   22:22:05   (   0.19,-135.14) (   0.69,-133.03)  241.00                80
 07/26/2015   10:41:11   (  -0.21,-135.12) (   0.51,-138.29)  361.61                80
 07/27/2015   10:25:06   (  -0.21,-135.12) (  -0.50,-133.76)  154.59                80
 07/28/2015   22:44:21   (   0.23,-135.12) (  -0.66,-139.07)  450.25                80
 07/29/2015   22:28:16   (   0.22,-135.11) (   0.35,-134.54)   65.31                80