Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2013 7 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)
 07/24/2013   15:59:31   (  22.60, 147.47) 07/24/2013   16:01:28    (  23.22, 144.61)  300.20            117
 08/01/2013   15:09:54   (  22.61, 159.87) 08/01/2013   15:10:56    (  23.21, 157.27)  274.24             62
 08/04/2013   03:31:40   (  22.69, 147.56) 08/04/2013   03:28:10    (  25.93, 144.93)  447.87            210
 08/09/2013   15:59:06   (  22.62, 147.56) 08/09/2013   16:01:51    (  23.30, 144.58)  314.47            165