Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 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)
 01/19/2012   10:13:51   (  -0.02,-134.58) (  -0.58,-132.07)  285.45                80
 01/20/2012   22:35:46   (   0.02,-134.51) (  -0.65,-137.37)  326.43                80
 01/21/2012   22:14:22   (   0.01,-134.48) (   0.39,-132.84)  186.90                80
 01/23/2012   10:36:09   (  -0.01,-134.46) (   0.82,-138.11)  416.11                80
 01/24/2012   10:20:06   (  -0.01,-134.44) (  -0.22,-133.59)   96.99                80
 01/26/2012   22:23:21   (   0.02,-134.34) (   0.03,-134.38)    4.69                80
 01/29/2012   10:23:47   (  -0.02,-134.29) (   0.20,-135.13)   97.46                80
 01/30/2012   10:07:46   (  -0.01,-134.25) (  -0.84,-130.62)  414.22                80
 01/31/2012   22:29:46   (  -0.01,-134.18) (  -0.40,-135.94)  200.43                80