Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 3 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/28/2015   22:33:19   (  -0.02,-134.71) (  -0.29,-135.93)  139.20                80
 03/29/2015   22:17:12   (  -0.02,-134.67) (   0.70,-131.39)  373.18                80
 03/31/2015   10:38:59   (   0.02,-134.64) (   0.45,-136.67)  231.25                80
 04/01/2015   10:17:32   (   0.02,-134.59) (  -0.53,-132.13)  280.56                80
 04/02/2015   22:39:26   (  -0.02,-134.50) (  -0.70,-137.42)  333.77                80
 04/03/2015   22:23:20   (  -0.02,-134.45) (   0.35,-132.90)  178.10                80
 04/05/2015   10:45:05   (   0.02,-134.41) (   0.85,-138.16)  426.71                80
 04/06/2015   10:23:39   (   0.02,-134.36) (  -0.14,-133.62)   84.37                80
 04/08/2015   22:26:46   (  -0.02,-134.20) (  -0.08,-134.37)   20.95                80
 04/09/2015   22:10:39   (  -0.01,-134.14) (   0.92,-129.84)  489.94                80