Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2013 4 27.  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   15:11:17   (  21.45, 159.44) 04/27/2013   15:10:57    (  21.96, 156.79)  280.22             20
 05/05/2013   16:00:20   (  22.60, 147.37) 05/05/2013   16:01:23    (  23.29, 144.43)  310.71             63
 05/13/2013   15:10:45   (  22.59, 159.77) 05/13/2013   15:10:44    (  23.10, 157.08)  281.77              1
 05/21/2013   15:59:58   (  22.61, 147.47) 05/21/2013   16:01:28    (  23.29, 144.45)  319.05             90