Simultaneous Nadir Overpasses (SNOs) near US between AQUA and NPP
TLE Epoch: 2013 4 12.  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)
 04/14/2013   07:20:00   (  49.23, -76.39) 04/14/2013   07:19:48    (  49.62, -78.63)  167.93             12
 04/14/2013   08:58:42   (  49.89,-100.83) 04/14/2013   09:01:04    (  50.43,-103.64)  208.85            142
 04/16/2013   18:17:58   (  49.94, -80.31) 04/16/2013   18:09:53    (  49.64, -81.89)  118.30            485
 04/16/2013   19:56:52   (  50.00,-105.06) 04/16/2013   19:51:23    (  49.64,-107.27)  163.48            329
 04/16/2013   21:31:54   (  36.22,-125.00) 04/16/2013   21:28:53    (  35.74,-127.59)  239.42            181