Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 8 12.  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)
 08/15/2013   15:47:15   (  22.63, 151.96) 08/15/2013   15:49:12    (  23.55, 147.81)  437.12            117
 08/16/2013   03:03:39   (  22.66, 155.41) 08/16/2013   03:01:57    (  22.02, 152.24)  333.38            102
 08/28/2013   02:31:15   (  13.05, 165.25) 08/28/2013   02:34:00    (  12.07, 160.94)  480.51            165
 08/28/2013   15:08:05   (  17.48, 160.93) 08/28/2013   15:06:36    (  18.17, 157.55)  366.08             89
 09/09/2013   16:18:57   (  22.58, 144.19) 09/09/2013   16:21:26    (  23.55, 139.82)  460.51            149
 09/10/2013   03:35:24   (  22.68, 147.63) 09/10/2013   03:34:11    (  22.02, 144.25)  355.38             73