Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 5 17.  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)
 05/19/2015   16:41:48   (  78.19, 178.99) 05/19/2015   16:40:50  (  78.19, 178.99)    0.09                58
 05/19/2015   17:31:05   ( -78.64, -11.13) 05/19/2015   17:31:24  ( -78.63, -11.17)    0.91                19
 05/22/2015   08:58:08   (  78.35, -64.35) 05/22/2015   08:57:40  (  78.34, -64.42)    1.60                28
 05/22/2015   09:47:25   ( -78.79, 105.60) 05/22/2015   09:48:14  ( -78.78, 105.50)    2.22                49
 05/25/2015   00:26:09   ( -75.41,-126.96) 05/25/2015   00:24:55  ( -75.54,-127.62)   22.92                74
 05/25/2015   01:14:24   (  78.67,  53.21) 05/25/2015   01:14:26  (  78.68,  53.32)    2.67                 2
 05/27/2015   16:41:29   ( -78.34,  -0.27) 05/27/2015   16:40:45  ( -78.34,  -0.22)    1.17                44
 05/27/2015   17:30:44   (  78.78, 169.68) 05/27/2015   17:31:18  (  78.78, 169.70)    0.26                34
 05/30/2015   08:57:48   ( -78.44, 116.18) 05/30/2015   08:57:37  ( -78.44, 116.10)    1.68                11