Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 7 1.  Predictions up to the next  30.0 days:

Date(NOAA-19)     Time(NOAA-19)   NOAA-19 Lat/Lon   Date(NPP)     Time(NPP)    NPP Lat/Lon    Distance (km)   Time Diff(sec)
 07/09/2013   03:10:24   (  16.50, 154.54) 07/09/2013   03:12:10    (  15.62, 150.66)  425.47            106
 07/09/2013   15:47:08   (  14.16, 150.26) 07/09/2013   15:44:42    (  14.82, 147.31)  325.96            146
 07/21/2013   15:15:12   (  22.59, 159.77) 07/21/2013   15:16:47    (  23.47, 155.80)  418.24             95
 07/22/2013   02:31:38   (  22.69, 163.22) 07/22/2013   02:29:31    (  22.11, 160.24)  312.66            127
 07/22/2013   04:11:37   (  15.36, 139.50) 07/22/2013   04:10:06    (  18.89, 135.66)  566.69             91