Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2013 3 18.  Predictions up to the next  30.0 days:

Date(AQUA)     Time(AQUA)   AQUA Lat/Lon   Date(NPP)     Time(NPP)    NPP Lat/Lon    Distance (km)   Time Diff(sec)
 03/18/2013   15:59:53   (  22.60, 147.43) 03/18/2013   16:00:48    (  23.25, 144.47)  311.55             55
 03/26/2013   15:11:34   (  18.67, 158.87) 03/26/2013   15:10:28    (  19.18, 156.35)  272.02             66
 04/03/2013   16:01:42   (  15.98, 145.93) 04/03/2013   15:59:51    (  16.44, 143.55)  259.26            111
 04/09/2013   03:12:41   (  19.25, 152.96) 04/09/2013   03:13:38    (  18.49, 149.60)  363.47             57