Simultaneous Nadir Overpasses (SNOs) near US between AQUA and NPP
TLE Epoch: 2013 3 21.  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)
 03/23/2013   19:06:58   (  50.00, -92.64) 03/23/2013   19:00:19    (  49.69, -94.57)  142.36            399
 03/23/2013   20:45:51   (  49.99,-117.36) 03/23/2013   20:41:47    (  49.58,-119.89)  187.63            244
 03/29/2013   07:19:22   (  49.97, -76.00) 03/29/2013   07:19:22    (  50.41, -78.26)  168.54              0
 03/29/2013   08:58:15   (  49.91,-100.74) 03/29/2013   09:00:50    (  50.47,-103.61)  213.33            155