Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 1 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2013   22:09:24   (   0.09,-134.87) (   0.89,-131.35)  402.07                80
 01/20/2013   10:31:11   (  -0.09,-134.85) (   0.32,-136.61)  201.06                80
 01/21/2013   10:09:47   (  -0.09,-134.81) (  -0.70,-132.08)  311.10                80
 01/22/2013   22:31:43   (   0.09,-134.71) (  -0.51,-137.38)  303.96                80
 01/23/2013   22:15:39   (   0.08,-134.67) (   0.51,-132.85)  208.16                80
 01/25/2013   10:37:26   (  -0.08,-134.64) (   0.70,-138.11)  395.37                80
 01/26/2013   10:16:01   (  -0.08,-134.59) (  -0.32,-133.58)  116.05                80
 01/28/2013   22:21:53   (   0.08,-134.43) (   0.12,-134.34)   11.10                80
 01/31/2013   10:24:56   (  -0.08,-134.35) (   0.06,-135.07)   82.44                80