Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 9 9.  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)
 09/11/2015   08:57:08   (  78.54, -63.23) 09/11/2015   08:56:10  (  78.55, -63.20)    0.69                58
 09/11/2015   09:46:26   ( -78.93, 106.55) 09/11/2015   09:46:45  ( -78.93, 106.54)    0.05                19
 09/14/2015   01:13:34   (  78.66,  53.25) 09/14/2015   01:12:59  (  78.66,  53.24)    0.14                35
 09/14/2015   02:02:52   ( -79.04,-136.93) 09/14/2015   02:03:34  ( -79.04,-136.96)    0.84                42
 09/16/2015   17:29:58   (  78.80, 169.90) 09/16/2015   17:29:46  (  78.80, 169.92)    0.55                12
 09/16/2015   18:19:17   ( -79.14, -20.46) 09/16/2015   18:20:22  ( -79.14, -20.47)    0.16                65
 09/19/2015   08:57:09   ( -78.44, 116.24) 09/19/2015   08:56:03  ( -78.44, 116.17)    1.78                66
 09/19/2015   09:46:21   (  79.01, -73.02) 09/19/2015   09:46:32  (  79.01, -72.89)    2.76                11
 09/22/2015   01:13:31   ( -78.69,-126.58) 09/22/2015   01:12:48  ( -78.70,-126.50)    1.92                43