Simultaneous Nadir Overpasses (SNOs) near US between AQUA and NPP
TLE Epoch: 2012 5 18.  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)
 05/21/2012   06:31:58   (  41.66, -66.73) 05/21/2012   06:30:36    (  42.02, -68.86)  180.83             82
 05/21/2012   08:08:32   (  49.93, -88.39) 05/21/2012   08:09:40    (  50.44, -90.89)  186.55             68
 05/21/2012   09:47:25   (  49.93,-113.11) 05/21/2012   09:51:08    (  50.54,-116.21)  230.96            223
 05/23/2012   19:06:38   (  49.95, -92.53) 05/23/2012   18:59:55    (  49.64, -94.42)  140.22            403
 05/23/2012   20:45:31   (  49.95,-117.25) 05/23/2012   20:41:23    (  49.53,-119.75)  185.53            248