Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 8 9.  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)
 08/10/2015   08:57:23   (  78.48, -63.59) 08/10/2015   08:56:47  (  78.47, -63.70)    2.66                36
 08/10/2015   09:46:39   ( -78.95, 106.63) 08/10/2015   09:47:20  ( -78.95, 106.58)    1.33                41
 08/13/2015   01:13:45   (  78.75,  53.73) 08/13/2015   01:13:32  (  78.76,  53.81)    1.90                13
 08/13/2015   02:03:02   ( -79.17,-136.16) 08/13/2015   02:04:06  ( -79.18,-136.02)    2.99                64
 08/15/2015   16:40:57   ( -78.35,  -0.13) 08/15/2015   16:39:51  ( -78.35,  -0.19)    1.37                66
 08/15/2015   17:30:10   (  78.88, 170.32) 08/15/2015   17:30:21  (  78.89, 170.41)    1.99                11
 08/18/2015   08:57:20   ( -78.56, 116.79) 08/18/2015   08:56:38  ( -78.56, 116.79)    0.06                42
 08/18/2015   09:46:37   (  78.91, -73.63) 08/18/2015   09:47:13  (  78.90, -73.74)    2.43                36
 08/21/2015   01:13:45   ( -78.61,-127.03) 08/21/2015   01:13:28  ( -78.60,-127.15)    2.97                17