Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 5 3.  Predictions up to the next  14.0 days:

     Date     Time(AURA) AURA Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/06/2015   08:58:23   (  78.20, -65.09) 05/06/2015   08:57:45  (  78.19, -65.21)    2.96                38
 05/06/2015   09:47:35   ( -78.85, 105.94) 05/06/2015   09:48:13  ( -78.86, 106.05)    2.54                38
 05/09/2015   01:14:47   (  78.45,  52.03) 05/09/2015   01:14:34  (  78.45,  51.98)    1.28                13
 05/09/2015   02:04:05   ( -78.85,-138.21) 05/09/2015   02:05:09  ( -78.84,-138.29)    1.97                64
 05/11/2015   16:41:58   ( -78.10,  -1.48) 05/11/2015   16:40:53  ( -78.09,  -1.54)    1.55                65
 05/11/2015   17:31:13   (  78.55, 168.42) 05/11/2015   17:31:26  (  78.54, 168.29)    3.03                13
 05/14/2015   08:58:22   ( -78.31, 115.40) 05/14/2015   08:57:43  ( -78.30, 115.37)    0.67                39
 05/14/2015   09:47:38   (  78.71, -74.86) 05/14/2015   09:48:17  (  78.71, -74.95)    2.01                39
 05/17/2015   01:14:43   ( -78.61,-127.14) 05/17/2015   01:14:30  ( -78.62,-127.01)    3.05                13