Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 13.  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)
 04/15/2015   00:24:54   (  78.55,  65.14) 04/15/2015   00:24:14  (  78.55,  65.25)    2.71                40
 04/15/2015   01:14:11   ( -78.98,-124.84) 04/15/2015   01:14:48  ( -78.98,-124.71)    2.99                37
 04/17/2015   16:41:28   (  78.55,-179.02) 04/17/2015   16:41:05  (  78.54,-179.04)    0.58                23
 04/17/2015   17:30:46   ( -78.94,  -9.22) 04/17/2015   17:31:40  ( -78.94,  -9.24)    0.48                54
 04/20/2015   08:58:01   (  78.57, -63.03) 04/20/2015   08:57:54  (  78.56, -63.13)    2.41                 7
 04/20/2015   09:47:19   ( -78.96, 106.79) 04/20/2015   09:48:29  ( -78.96, 106.68)    2.47                70
 04/23/2015   00:25:17   ( -78.30,-116.20) 04/23/2015   00:24:07  ( -78.30,-116.17)    0.83                70
 04/23/2015   01:14:34   (  78.67,  53.34) 04/23/2015   01:14:42  (  78.66,  53.22)    2.89                 8
 04/25/2015   16:41:50   ( -78.43,   0.28) 04/25/2015   16:40:54  ( -78.43,   0.35)    1.68                56