Simultaneous Nadir Overpasses (SNOs) near US between AQUA and NPP
TLE Epoch: 2013 4 20.  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)
 04/22/2013   06:32:38   (  41.88, -66.74) 04/22/2013   06:31:16    (  42.23, -68.86)  179.35             82
 04/22/2013   08:09:16   (  49.91, -88.47) 04/22/2013   08:10:24    (  50.43, -90.96)  185.88             68
 04/22/2013   09:48:09   (  49.92,-113.19) 04/22/2013   09:51:52    (  50.54,-116.28)  230.26            223
 04/24/2013   19:07:25   (  49.95, -92.67) 04/24/2013   19:00:43    (  49.64, -94.58)  141.91            402
 04/24/2013   20:46:18   (  49.95,-117.39) 04/24/2013   20:42:11    (  49.53,-119.91)  187.21            247
 04/30/2013   07:19:45   (  50.00, -76.06) 04/30/2013   07:19:45    (  50.39, -78.29)  164.62              0
 04/30/2013   08:58:39   (  49.94,-100.80) 04/30/2013   09:01:13    (  50.50,-103.61)  209.32            154