Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 9 20.  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)
 09/22/2015   01:13:30   ( -78.69,-126.55) 09/22/2015   01:12:47  ( -78.70,-126.48)    1.69                43
 09/22/2015   02:02:48   (  79.01,  42.91) 09/22/2015   02:03:23  (  79.01,  42.90)    0.26                35
 09/24/2015   17:29:55   ( -78.79, -10.12) 09/24/2015   17:29:36  ( -78.79, -10.09)    0.53                19
 09/24/2015   18:19:13   (  79.11, 159.37) 09/24/2015   18:20:12  (  79.10, 159.30)    1.41                59
 09/27/2015   08:57:01   (  78.53, -63.28) 09/27/2015   08:55:49  (  78.53, -63.24)    0.99                72
 09/27/2015   09:46:19   ( -78.92, 106.48) 09/27/2015   09:46:24  ( -78.92, 106.52)    0.97                 5
 09/30/2015   01:13:22   (  78.73,  53.65) 09/30/2015   01:12:34  (  78.73,  53.77)    2.73                48
 09/30/2015   02:02:40   ( -79.11,-136.51) 09/30/2015   02:03:09  ( -79.11,-136.37)    3.02                29
 10/02/2015   17:29:48   (  78.74, 169.62) 10/02/2015   17:29:25  (  78.74, 169.61)    0.31                23