Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2013 9 8.  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)
 09/10/2013   15:59:24   (  22.59, 147.46) 09/10/2013   16:02:27    (  23.28, 144.53)  310.02            183
 09/18/2013   15:10:04   (  22.58, 159.78) 09/18/2013   15:11:52    (  23.14, 157.17)  275.08            108
 09/21/2013   03:31:56   (  22.70, 147.46) 09/21/2013   03:28:26    (  23.65, 145.44)  232.10            210
 09/26/2013   15:59:34   (  22.64, 147.42) 09/26/2013   16:02:43    (  23.26, 144.51)  306.01            189
 10/04/2013   15:10:08   (  22.62, 159.77) 10/04/2013   15:12:06    (  23.18, 157.17)  273.20            118