Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 1 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/11/2013   22:38:00   (   0.09,-135.10) (  -0.75,-138.92)  435.52                80
 01/12/2013   22:21:55   (   0.09,-135.07) (   0.24,-134.38)   77.99                80
 01/15/2013   10:24:57   (  -0.09,-135.01) (  -0.09,-135.12)   11.60                80
 01/17/2013   22:25:27   (   0.09,-134.89) (  -0.11,-135.87)  111.37                80
 01/18/2013   22:09:21   (   0.09,-134.86) (   0.89,-131.34)  401.70                80
 01/20/2013   10:31:07   (  -0.09,-134.83) (   0.31,-136.59)  201.14                80
 01/21/2013   10:09:42   (  -0.08,-134.79) (  -0.69,-132.06)  311.23                80
 01/22/2013   22:31:37   (   0.09,-134.69) (  -0.51,-137.35)  303.48                80
 01/23/2013   22:15:32   (   0.08,-134.65) (   0.50,-132.82)  208.86                80