Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 9 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/05/2015   22:14:57   (  -0.37,-135.18) (   0.48,-131.34)  437.44                80
 09/07/2015   10:36:43   (   0.36,-135.18) (   0.68,-136.61)  162.89                80
 09/08/2015   10:15:17   (   0.36,-135.19) (  -0.35,-132.08)  355.06                80
 09/09/2015   22:37:12   (  -0.35,-135.23) (  -0.84,-137.38)  245.74                80
 09/10/2015   22:21:06   (  -0.35,-135.24) (   0.20,-132.85)  272.38                80
 09/12/2015   10:40:13   (   0.34,-135.24) (   0.96,-138.12)  327.97                80
 09/13/2015   10:21:26   (   0.34,-135.25) (  -0.02,-133.58)  189.70                80
 09/14/2015   22:43:20   (  -0.33,-135.27) (  -1.16,-138.88)  412.42                80
 09/15/2015   22:27:15   (  -0.33,-135.28) (  -0.12,-134.35)  105.24                80
 09/17/2015   10:46:21   (   0.32,-135.27) (   1.27,-139.63)  495.55                80
 09/18/2015   10:30:15   (   0.32,-135.27) (   0.29,-135.09)   21.36                80