Simultaneous Nadir Overpasses (SNOs) near US between AQUA and NPP
TLE Epoch: 2013 5 10.  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)
 05/10/2013   20:46:01   (  50.00,-117.32) 05/10/2013   20:42:18    (  49.53,-119.90)  192.47            223
 05/16/2013   07:19:17   (  49.88, -76.02) 05/16/2013   07:19:51    (  50.34, -78.29)  169.77             34
 05/16/2013   08:58:09   (  49.93,-100.72) 05/16/2013   09:01:18    (  50.51,-103.59)  213.96            189
 05/18/2013   18:17:19   (  50.00, -80.15) 05/18/2013   18:10:09    (  49.72, -81.91)  129.78            430
 05/18/2013   19:56:11   (  49.95,-104.85) 05/18/2013   19:51:36    (  49.55,-107.21)  175.13            275