Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2013 4 17.  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)
 04/19/2013   16:00:23   (  22.64, 147.36) 04/19/2013   16:01:14    (  23.30, 144.43)  308.28             51
 04/27/2013   15:11:12   (  21.57, 159.48) 04/27/2013   15:10:54    (  22.09, 156.82)  280.77             18
 05/05/2013   16:00:15   (  22.59, 147.39) 05/05/2013   16:01:24    (  23.25, 144.42)  313.21             69
 05/13/2013   15:10:35   (  22.60, 159.81) 05/13/2013   15:10:43    (  23.22, 157.10)  286.11              8