Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 9 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/04/2015   22:31:03   (  -0.37,-135.16) (  -0.52,-135.88)   81.10                80
 09/05/2015   22:14:57   (  -0.37,-135.18) (   0.52,-131.35)  437.33                80
 09/07/2015   10:36:44   (   0.36,-135.18) (   0.65,-136.62)  162.92                80
 09/08/2015   10:15:17   (   0.36,-135.19) (  -0.33,-132.08)  355.03                80
 09/09/2015   22:37:12   (  -0.35,-135.23) (  -0.81,-137.39)  245.93                80
 09/10/2015   22:21:06   (  -0.35,-135.24) (   0.17,-132.85)  272.18                80
 09/12/2015   10:40:12   (   0.34,-135.24) (   0.99,-138.12)  328.08                80
 09/13/2015   10:24:07   (   0.34,-135.25) (  -0.04,-133.59)  189.56                80
 09/14/2015   22:43:21   (  -0.33,-135.27) (  -1.15,-138.89)  412.70                80
 09/15/2015   22:27:16   (  -0.33,-135.28) (  -0.11,-134.36)  104.93                80