Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2012 7 21.  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)
 07/21/2012   15:59:30   (  22.59, 147.40) 07/21/2012   15:59:55    (  23.20, 144.59)  296.18             25
 07/29/2012   15:10:39   (  20.04, 159.18) 07/29/2012   15:09:55    (  20.54, 156.60)  274.32             44
 08/06/2012   15:59:13   (  22.62, 147.45) 08/06/2012   15:59:52    (  23.24, 144.58)  301.64             39
 08/14/2012   15:10:01   (  21.05, 159.48) 08/14/2012   15:09:34    (  21.54, 156.85)  278.16             27