Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2013 4 20.  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)
 04/27/2013   15:11:12   (  21.61, 159.49) 04/27/2013   15:10:54    (  22.13, 156.83)  280.56             18
 05/05/2013   16:00:14   (  22.62, 147.40) 05/05/2013   16:01:23    (  23.30, 144.43)  313.00             69
 05/13/2013   15:10:34   (  22.64, 159.82) 05/13/2013   15:10:43    (  23.22, 157.10)  285.98              9