Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 7 21.  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)
 07/22/2015   16:40:54   (  78.38,-179.97) 07/22/2015   16:40:12  (  78.37, 179.91)    2.88                42
 07/22/2015   17:30:08   ( -78.93,  -9.35) 07/22/2015   17:30:43  ( -78.93,  -9.33)    0.43                35
 07/25/2015   08:57:14   (  78.61, -62.88) 07/25/2015   08:56:59  (  78.60, -62.96)    2.17                15
 07/25/2015   09:46:30   ( -79.07, 107.39) 07/25/2015   09:47:32  ( -79.08, 107.44)    1.04                62
 07/28/2015   00:24:20   ( -78.30,-116.22) 07/28/2015   00:23:15  ( -78.29,-116.29)    1.89                65
 07/28/2015   01:13:34   (  78.79,  53.99) 07/28/2015   01:13:46  (  78.79,  53.97)    0.36                12
 07/30/2015   16:40:39   ( -78.56,   1.00) 07/30/2015   16:40:01  ( -78.56,   1.03)    0.65                38
 07/30/2015   17:29:53   (  79.04, 171.31) 07/30/2015   17:30:32  (  79.04, 171.43)    2.61                39
 08/02/2015   08:57:02   ( -78.64, 117.32) 08/02/2015   08:56:52  ( -78.64, 117.24)    1.95                10