Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2013   10:26:37   (   0.05,-135.12) (   0.09,-135.34)   24.73                80
 04/22/2013   10:05:13   (   0.05,-135.15) (  -0.90,-130.80)  494.51                80
 04/23/2013   22:27:10   (  -0.04,-135.18) (  -0.28,-136.11)  106.50                80
 04/24/2013   22:11:06   (  -0.05,-135.20) (   0.77,-131.59)  412.40                80
 04/26/2013   10:32:56   (   0.04,-135.24) (   0.37,-136.86)  184.38                80
 04/27/2013   10:11:31   (   0.04,-135.26) (  -0.62,-132.33)  333.79                80
 04/28/2013   22:33:29   (  -0.03,-135.27) (  -0.56,-137.63)  269.25                80
 04/29/2013   22:17:24   (  -0.04,-135.28) (   0.43,-133.10)  248.68                80
 05/01/2013   10:36:33   (   0.03,-135.31) (   0.71,-138.38)  349.04                80
 05/02/2013   10:20:29   (   0.04,-135.32) (  -0.29,-133.84)  168.61                80