Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 8 23.  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)
 08/26/2015   08:57:16   (  78.48, -63.59) 08/26/2015   08:56:31  (  78.47, -63.70)    2.76                45
 08/26/2015   09:46:34   ( -78.87, 106.17) 08/26/2015   09:47:06  ( -78.86, 106.04)    2.93                32
 08/29/2015   01:13:40   (  78.60,  52.94) 08/29/2015   01:13:20  (  78.59,  52.81)    3.02                20
 08/29/2015   02:02:54   ( -79.15,-136.28) 08/29/2015   02:03:50  ( -79.16,-136.15)    2.94                56
 08/31/2015   16:40:45   ( -78.40,   0.12) 08/31/2015   16:39:32  ( -78.39,   0.10)    0.64                73
 08/31/2015   17:30:01   (  78.80, 169.88) 08/31/2015   17:30:06  (  78.79, 169.80)    2.11                 5
 09/03/2015   08:57:07   ( -78.59, 116.99) 09/03/2015   08:56:19  ( -78.59, 117.04)    1.17                48
 09/03/2015   09:46:23   (  78.98, -73.19) 09/03/2015   09:46:53  (  78.98, -73.19)    0.08                30
 09/06/2015   01:13:32   ( -78.64,-126.85) 09/06/2015   01:13:10  ( -78.63,-126.94)    2.08                22