Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 9 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2015   10:36:43   (   0.36,-135.18) (   0.68,-136.61)  163.10                80
 09/08/2015   10:15:18   (   0.36,-135.19) (  -0.36,-132.08)  354.82                80
 09/09/2015   22:37:12   (  -0.35,-135.22) (  -0.83,-137.38)  245.80                80
 09/10/2015   22:21:06   (  -0.35,-135.24) (   0.20,-132.85)  272.30                80
 09/12/2015   10:40:13   (   0.34,-135.24) (   0.96,-138.12)  328.28                80
 09/13/2015   10:21:26   (   0.34,-135.24) (  -0.02,-133.58)  189.35                80
 09/14/2015   22:43:21   (  -0.33,-135.27) (  -1.11,-138.89)  412.62                80
 09/15/2015   22:27:15   (  -0.33,-135.27) (  -0.13,-134.35)  105.00                80
 09/17/2015   10:46:21   (   0.32,-135.27) (   1.29,-139.62)  496.01                80
 09/18/2015   10:27:35   (   0.33,-135.27) (   0.31,-135.08)   21.00                80
 09/20/2015   22:30:44   (  -0.31,-135.27) (  -0.46,-135.85)   66.51                80