Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 7 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/01/2015   10:28:36   (  -0.23,-135.07) (  -0.18,-135.27)   22.41                80
 08/02/2015   10:12:31   (  -0.22,-135.06) (  -1.19,-130.74)  493.16                80
 08/03/2015   22:31:46   (   0.24,-135.06) (   0.04,-136.05)  111.94                80
 08/04/2015   22:15:41   (   0.23,-135.05) (   1.05,-131.52)  403.24                80
 08/06/2015   10:34:47   (  -0.25,-135.01) (   0.14,-136.78)  202.16                80
 08/07/2015   10:18:42   (  -0.25,-134.99) (  -0.88,-132.25)  312.67                80
 08/08/2015   22:37:56   (   0.26,-134.98) (  -0.33,-137.55)  293.32                80
 08/09/2015   22:21:50   (   0.26,-134.96) (   0.69,-133.02)  221.11                80
 08/11/2015   10:40:58   (  -0.28,-134.91) (   0.45,-138.30)  385.43                80
 08/12/2015   10:24:51   (  -0.27,-134.89) (  -0.51,-133.75)  128.87                80
 08/13/2015   22:44:06   (   0.29,-134.87) (  -0.63,-139.06)  477.51                80