Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 9 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)
 09/14/2015   01:13:33   (  78.67,  53.32) 09/14/2015   01:12:58  (  78.67,  53.33)    0.21                35
 09/14/2015   02:02:51   ( -79.05,-136.88) 09/14/2015   02:03:33  ( -79.05,-136.89)    0.45                42
 09/16/2015   17:29:58   (  78.81, 169.97) 09/16/2015   17:29:46  (  78.81, 170.01)    0.96                12
 09/16/2015   18:19:17   ( -79.14, -20.41) 09/16/2015   18:20:22  ( -79.15, -20.40)    0.48                65
 09/19/2015   08:57:09   ( -78.45, 116.29) 09/19/2015   08:56:03  ( -78.45, 116.23)    1.36                66
 09/19/2015   09:46:26   (  78.81, -74.13) 09/19/2015   09:46:38  (  78.80, -74.27)    3.15                12
 09/22/2015   01:13:30   ( -78.70,-126.53) 09/22/2015   01:12:47  ( -78.70,-126.43)    2.22                43
 09/22/2015   02:02:47   (  79.05,  43.14) 09/22/2015   02:03:22  (  79.05,  43.16)    0.51                35
 09/24/2015   17:29:55   ( -78.81, -10.05) 09/24/2015   17:29:36  ( -78.81, -10.00)    1.07                19
 09/24/2015   18:19:13   (  79.11, 159.41) 09/24/2015   18:20:12  (  79.11, 159.37)    0.74                59
 09/27/2015   08:57:02   (  78.51, -63.40) 09/27/2015   08:55:50  (  78.51, -63.34)    1.48                72