Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/30/2015   22:16:20   (  -0.06,-135.39) (   0.82,-131.32)  463.60                80
 05/02/2015   10:35:26   (   0.06,-135.45) (   0.33,-136.59)  130.00                80
 05/03/2015   10:19:19   (   0.06,-135.46) (  -0.70,-132.06)  387.82                80
 05/04/2015   22:38:32   (  -0.06,-135.42) (  -0.48,-137.35)  220.00                80
 05/05/2015   22:22:26   (  -0.06,-135.42) (   0.55,-132.82)  297.34                80
 05/07/2015   10:41:30   (   0.05,-135.47) (   0.65,-138.08)  297.79                80
 05/08/2015   10:25:24   (   0.06,-135.47) (  -0.38,-133.55)  219.10                80
 05/09/2015   22:44:37   (  -0.05,-135.42) (  -0.79,-138.85)  390.18                80
 05/10/2015   22:28:30   (  -0.06,-135.41) (   0.18,-134.30)  126.35                80
 05/12/2015   10:47:35   (   0.05,-135.44) (   0.95,-139.57)  469.96                80
 05/13/2015   10:31:27   (   0.06,-135.43) (  -0.03,-135.03)   46.30                80