Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 5 12.  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)
 05/14/2015   08:58:21   ( -78.31, 115.41) 05/14/2015   08:57:43  ( -78.30, 115.38)    0.90                38
 05/14/2015   09:47:37   (  78.72, -74.82) 05/14/2015   09:48:17  (  78.71, -74.90)    2.03                40
 05/17/2015   01:14:42   ( -78.57,-127.37) 05/17/2015   01:14:31  ( -78.58,-127.27)    2.50                11
 05/17/2015   02:03:58   (  78.97,  42.48) 05/17/2015   02:05:05  (  78.97,  42.55)    1.61                67
 05/19/2015   16:41:49   (  78.17, 178.89) 05/19/2015   16:40:50  (  78.17, 178.86)    0.75                59
 05/19/2015   17:31:06   ( -78.62, -11.22) 05/19/2015   17:31:24  ( -78.62, -11.29)    1.51                18
 05/22/2015   08:58:09   (  78.40, -64.12) 05/22/2015   08:57:39  (  78.40, -64.12)    0.06                30
 05/22/2015   09:47:26   ( -78.84, 105.86) 05/22/2015   09:48:13  ( -78.83, 105.84)    0.51                47
 05/25/2015   00:28:10   ( -69.15,-138.76) 05/25/2015   00:26:57  ( -69.39,-140.40)   70.37                73
 05/25/2015   01:14:29   (  78.58,  52.70) 05/25/2015   01:14:29  (  78.57,  52.68)    0.36                 0