Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/16/2015   10:38:35   (   0.05,-135.14) (   0.36,-136.65)  170.79                80
 04/17/2015   10:17:09   (   0.05,-135.17) (  -0.64,-132.11)  348.98                80
 04/18/2015   22:39:02   (  -0.05,-135.18) (  -0.56,-137.41)  253.80                80
 04/19/2015   22:22:56   (  -0.05,-135.21) (   0.45,-132.87)  265.85                80
 04/21/2015   10:44:42   (   0.05,-135.28) (   0.67,-138.15)  326.79                80
 04/22/2015   10:23:16   (   0.06,-135.30) (  -0.34,-133.61)  192.43                80
 04/23/2015   22:45:09   (  -0.06,-135.30) (  -0.85,-138.91)  411.46                80
 04/24/2015   22:29:02   (  -0.06,-135.32) (   0.16,-134.37)  107.73                80
 04/26/2015   10:50:48   (   0.06,-135.38) (   1.00,-139.64)  485.32                80
 04/27/2015   10:29:21   (   0.07,-135.40) (  -0.01,-135.11)   33.52                80