Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 8 18.  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)
 08/21/2015   01:13:42   ( -78.76,-126.23) 08/21/2015   01:13:24  ( -78.76,-126.16)    1.53                18
 08/21/2015   02:03:00   (  79.07,  43.22) 08/21/2015   02:04:00  (  79.07,  43.18)    0.87                60
 08/23/2015   16:40:51   (  78.38,-180.00) 08/23/2015   16:39:41  (  78.37, 179.97)    0.91                70
 08/23/2015   17:30:08   ( -78.82, -10.03) 08/23/2015   17:30:15  ( -78.81, -10.07)    0.96                 7
 08/26/2015   08:57:15   (  78.51, -63.45) 08/26/2015   08:56:30  (  78.50, -63.52)    1.68                45
 08/26/2015   09:46:33   ( -78.90, 106.35) 08/26/2015   09:47:05  ( -78.90, 106.26)    1.92                32
 08/29/2015   01:13:38   (  78.67,  53.27) 08/29/2015   01:13:18  (  78.66,  53.23)    0.98                20
 08/29/2015   02:02:56   ( -79.06,-136.86) 08/29/2015   02:03:53  ( -79.05,-136.92)    1.35                57
 08/31/2015   16:40:42   ( -78.50,   0.64) 08/31/2015   16:39:29  ( -78.51,   0.76)    2.61                73