Simultaneous Nadir Overpasses (SNOs) near US between AQUA and NPP
TLE Epoch: 2012 9 13.  Predictions up to the next  10.0 days:

Date(AQUA)     Time(AQUA)   AQUA Lat/Lon   Date(NPP)     Time(NPP)    NPP Lat/Lon    Distance (km)   Time Diff(sec)
 09/18/2012   07:18:25   (  49.40, -76.17) 09/18/2012   07:18:15    (  49.79, -78.40)  166.44             10
 09/18/2012   08:57:09   (  49.93,-100.67) 09/18/2012   08:59:33    (  50.47,-103.47)  208.02            144
 09/20/2012   18:16:22   (  49.98, -80.12) 09/20/2012   18:08:21    (  49.72, -81.70)  116.76            481
 09/20/2012   19:55:15   (  49.98,-104.84) 09/20/2012   19:49:49    (  49.61,-107.02)  162.00            326
 09/20/2012   21:30:28   (  36.87,-124.99) 09/20/2012   21:27:31    (  36.41,-127.58)  236.83            177