Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2012   22:15:49   (   0.08,-135.47) (   0.62,-132.94)  287.64                80
 12/24/2012   10:34:58   (  -0.09,-135.49) (   0.50,-138.22)  310.60                80
 12/25/2012   10:18:52   (  -0.08,-135.48) (  -0.48,-133.68)  205.94                80
 12/26/2012   22:38:07   (   0.09,-135.45) (  -0.72,-138.97)  401.70                80
 12/27/2012   22:22:03   (   0.08,-135.45) (   0.33,-134.45)  114.79                80
 12/29/2012   10:41:10   (  -0.09,-135.47) (   0.83,-139.72)  483.84                80
 12/30/2012   10:25:05   (  -0.08,-135.46) (  -0.16,-135.18)   32.05                80
 01/01/2013   22:25:35   (   0.09,-135.40) (  -0.03,-135.94)   61.37                80
 01/02/2013   22:09:29   (   0.08,-135.39) (   0.97,-131.40)  454.27                80
 01/04/2013   10:28:36   (  -0.09,-135.39) (   0.17,-136.67)  145.21                80