Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/28/2015   22:44:21   (   0.23,-135.12) (  -0.65,-139.07)  450.25                80
 07/29/2015   22:28:16   (   0.22,-135.11) (   0.37,-134.54)   65.45                80
 08/01/2015   10:28:37   (  -0.23,-135.07) (  -0.19,-135.27)   22.87                80
 08/02/2015   10:12:31   (  -0.22,-135.06) (  -1.20,-130.74)  492.44                80
 08/03/2015   22:31:46   (   0.24,-135.05) (   0.04,-136.05)  113.77                80
 08/04/2015   22:15:40   (   0.23,-135.03) (   1.00,-131.50)  401.16                80
 08/06/2015   10:34:47   (  -0.25,-134.99) (   0.14,-136.78)  203.91                80
 08/07/2015   10:18:42   (  -0.25,-134.97) (  -0.87,-132.25)  310.69                80
 08/08/2015   22:37:56   (   0.26,-134.95) (  -0.34,-137.55)  296.33                80
 08/09/2015   22:21:51   (   0.26,-134.93) (   0.68,-133.02)  217.83                80