Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 9 11.  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   (  78.53, -63.28) 09/11/2015   08:56:10  (  78.54, -63.25)    0.78                58
 09/11/2015   09:46:26   ( -78.92, 106.47) 09/11/2015   09:46:45  ( -78.92, 106.47)    0.19                19
 09/14/2015   01:13:34   (  78.64,  53.18) 09/14/2015   01:12:59  (  78.64,  53.17)    0.24                35
 09/14/2015   02:02:52   ( -79.03,-137.01) 09/14/2015   02:03:34  ( -79.02,-137.05)    0.87                42
 09/16/2015   17:29:59   (  78.78, 169.82) 09/16/2015   17:29:47  (  78.78, 169.82)    0.21                12
 09/16/2015   18:19:16   ( -79.16, -20.32) 09/16/2015   18:20:21  ( -79.16, -20.33)    0.45                65
 09/19/2015   08:57:09   ( -78.42, 116.14) 09/19/2015   08:56:03  ( -78.41, 116.03)    2.59                66
 09/19/2015   09:46:22   (  78.95, -73.36) 09/19/2015   09:46:33  (  78.96, -73.28)    1.91                11
 09/22/2015   01:13:31   ( -78.67,-126.70) 09/22/2015   01:12:48  ( -78.67,-126.68)    0.51                43
 09/22/2015   02:02:49   (  78.98,  42.70) 09/22/2015   02:03:24  (  78.98,  42.64)    1.32                35
 09/24/2015   17:29:57   ( -78.73, -10.49) 09/24/2015   17:29:38  ( -78.72, -10.54)    1.29                19