Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 9 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)
 09/19/2015   08:57:09   ( -78.44, 116.23) 09/19/2015   08:56:03  ( -78.43, 116.15)    1.94                66
 09/19/2015   09:46:22   (  78.97, -73.23) 09/19/2015   09:46:33  (  78.98, -73.12)    2.49                11
 09/22/2015   01:13:32   ( -78.64,-126.82) 09/22/2015   01:12:49  ( -78.65,-126.78)    1.00                43
 09/22/2015   02:02:49   (  79.00,  42.85) 09/22/2015   02:03:24  (  79.00,  42.81)    0.84                35
 09/24/2015   17:29:56   ( -78.75, -10.34) 09/24/2015   17:29:37  ( -78.75, -10.38)    1.11                19
 09/24/2015   18:19:14   (  79.07, 159.11) 09/24/2015   18:20:13  (  79.06, 158.98)    2.96                59
 09/27/2015   08:57:04   (  78.41, -63.89) 09/27/2015   08:55:52  (  78.41, -63.96)    1.81                72
 09/27/2015   09:46:21   ( -78.85, 106.09) 09/27/2015   09:46:26  ( -78.84, 106.01)    1.92                 5
 09/30/2015   01:13:27   (  78.59,  52.90) 09/30/2015   01:12:39  (  78.58,  52.83)    1.71                48