Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 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)
 04/07/2015   22:48:14   (  -0.04,-134.84) (  -0.95,-138.94)  467.43                80
 04/08/2015   22:29:28   (  -0.04,-134.89) (   0.05,-134.40)   55.17                80
 04/11/2015   10:32:28   (   0.04,-135.05) (   0.09,-135.14)   10.84                80
 04/13/2015   22:35:36   (  -0.05,-135.13) (  -0.24,-135.91)   89.35                80
 04/14/2015   22:16:50   (  -0.05,-135.17) (   0.82,-131.38)  432.28                80
 04/16/2015   10:38:35   (   0.05,-135.28) (   0.37,-136.65)  156.35                80
 04/17/2015   10:17:10   (   0.05,-135.32) (  -0.69,-132.13)  364.78                80
 04/18/2015   22:41:43   (  -0.05,-135.34) (  -0.50,-137.42)  237.16                80
 04/19/2015   22:20:17   (  -0.05,-135.38) (   0.50,-132.88)  283.81                80