Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 9 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/14/2013   22:28:21   (  -0.37,-135.46) (  -0.49,-135.97)   58.18                80
 09/15/2013   22:12:17   (  -0.38,-135.46) (   0.53,-131.44)  458.13                80
 09/17/2013   10:31:27   (   0.36,-135.51) (   0.63,-136.72)  138.02                80
 09/18/2013   10:15:23   (   0.36,-135.50) (  -0.40,-132.19)  377.89                80
 09/19/2013   22:34:41   (  -0.34,-135.44) (  -0.77,-137.50)  233.91                80
 09/20/2013   22:18:37   (  -0.35,-135.43) (   0.19,-132.96)  282.15                80
 09/22/2013   10:37:46   (   0.33,-135.48) (   0.97,-138.23)  314.07                80
 09/23/2013   10:21:43   (   0.34,-135.47) (  -0.06,-133.70)  201.31                80
 09/24/2013   22:41:01   (  -0.31,-135.39) (  -1.11,-139.01)  412.25                80
 09/25/2013   22:24:57   (  -0.32,-135.38) (  -0.14,-134.47)  103.06                80
 09/27/2013   10:44:07   (   0.29,-135.42) (   1.24,-139.76)  493.77                80