Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 9 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2015   10:42:52   (   0.34,-135.23) (   0.97,-138.12)  328.42                80
 09/13/2015   10:21:26   (   0.34,-135.24) (  -0.00,-133.58)  189.19                80
 09/14/2015   22:43:21   (  -0.33,-135.27) (  -1.13,-138.89)  411.97                80
 09/15/2015   22:27:15   (  -0.34,-135.28) (  -0.15,-134.35)  105.67                80
 09/17/2015   10:46:21   (   0.32,-135.27) (   1.30,-139.62)  496.17                80
 09/18/2015   10:30:15   (   0.33,-135.27) (   0.26,-135.09)   20.81                80
 09/20/2015   22:30:43   (  -0.32,-135.28) (  -0.47,-135.85)   66.03                80
 09/21/2015   22:14:38   (  -0.32,-135.27) (   0.57,-131.32)  450.51                80
 09/23/2015   10:33:44   (   0.30,-135.25) (   0.58,-136.59)  152.94                80
 09/24/2015   10:17:38   (   0.31,-135.24) (  -0.40,-132.05)  362.80                80
 09/25/2015   22:36:52   (  -0.28,-135.23) (  -0.79,-137.35)  242.48                80