Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 12 15.  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)
 12/16/2015   09:46:12   ( -79.17, 108.08) 12/16/2015   09:45:42  ( -79.17, 108.12)    0.76                30
 12/16/2015   10:35:29   (  79.51, -81.98) 12/16/2015   10:36:16  (  79.52, -81.85)    2.83                47
 12/19/2015   02:02:39   ( -79.26,-135.47) 12/19/2015   02:02:32  ( -79.26,-135.46)    0.20                 7
 12/19/2015   02:51:56   (  79.60,  34.49) 12/19/2015   02:53:06  (  79.60,  34.62)    2.67                70
 12/21/2015   17:29:47   (  79.04, 171.43) 12/21/2015   17:28:46  (  79.04, 171.44)    0.34                61
 12/21/2015   18:19:05   ( -79.40, -18.63) 12/21/2015   18:19:21  ( -79.41, -18.53)    2.19                16
 12/24/2015   09:46:14   (  79.13, -72.15) 12/24/2015   09:45:37  (  79.12, -72.20)    1.17                37
 12/24/2015   10:35:33   ( -79.45,  97.58) 12/24/2015   10:36:13  ( -79.45,  97.59)    0.51                40
 12/27/2015   02:02:39   (  79.27,  44.64) 12/27/2015   02:02:26  (  79.27,  44.64)    0.20                13
 12/27/2015   02:51:58   ( -79.59,-145.57) 12/27/2015   02:53:02  ( -79.59,-145.50)    1.37                64
 12/29/2015   17:29:46   ( -79.05,  -8.48) 12/29/2015   17:28:40  ( -79.05,  -8.48)    0.23                66