Simultaneous Nadir Overpasses (SNOs) between AQUA and NPP over region 
TLE Epoch: 2012 12 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)
 12/20/2012   15:11:08   (  18.87, 158.85) 12/20/2012   15:10:05    (  19.38, 156.34)  270.48             63
 12/28/2012   15:59:27   (  22.60, 147.39) 12/28/2012   15:59:43    (  23.22, 144.61)  293.44             16
 01/05/2013   15:10:17   (  20.34, 159.32) 01/05/2013   15:09:38    (  20.85, 156.71)  276.88             39
 01/13/2013   15:58:31   (  22.58, 147.64) 01/13/2013   15:59:43    (  23.26, 144.63)  317.51             72