Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 1 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/09/2013   10:37:30   (  -0.10,-135.20) (   0.57,-138.16)  337.26                80
 01/10/2013   10:16:04   (  -0.09,-135.17) (  -0.42,-133.62)  176.07                80
 01/11/2013   22:38:00   (   0.09,-135.09) (  -0.79,-138.91)  436.76                80
 01/12/2013   22:21:55   (   0.09,-135.06) (   0.26,-134.39)   76.72                80
 01/15/2013   10:24:57   (  -0.09,-135.00) (  -0.09,-135.12)   12.71                80
 01/17/2013   22:25:27   (   0.09,-134.88) (  -0.13,-135.87)  113.12                80
 01/18/2013   22:09:21   (   0.09,-134.85) (   0.86,-131.34)  399.83                80
 01/20/2013   10:31:09   (  -0.09,-134.82) (   0.29,-136.60)  202.73                80
 01/21/2013   10:09:43   (  -0.08,-134.78) (  -0.70,-132.07)  309.53                80