Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 7 8.  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)
 07/09/2017   02:53:52   ( -73.76,-167.96) 07/09/2017   02:52:39  ( -74.01,-169.64)   58.55                73
 07/09/2017   03:41:17   (  79.38,  20.57) 07/09/2017   03:41:18  (  79.38,  20.58)    0.20                 1
 07/11/2017   19:08:24   ( -79.22, -32.24) 07/11/2017   19:07:33  ( -79.22, -32.20)    0.91                51
 07/11/2017   19:57:44   (  79.43, 136.83) 07/11/2017   19:58:11  (  79.43, 136.77)    1.24                27
 07/14/2017   11:24:51   ( -79.27,  84.00) 07/14/2017   11:24:26  ( -79.27,  83.99)    0.17                25
 07/14/2017   12:14:10   (  79.52,-106.68) 07/14/2017   12:15:03  (  79.52,-106.78)    2.35                53
 07/17/2017   02:53:52   (  73.56,  11.62) 07/17/2017   02:52:39  (  73.83,   9.95)   59.99                73
 07/17/2017   03:41:16   ( -79.36,-159.53) 07/17/2017   03:41:17  ( -79.36,-159.56)    0.83                 1
 07/19/2017   19:08:23   (  79.11, 147.12) 07/19/2017   19:07:33  (  79.11, 147.00)    2.69                50
 07/19/2017   19:57:42   ( -79.45, -43.07) 07/19/2017   19:58:09  ( -79.45, -43.12)    1.18                27
 07/22/2017   11:24:48   (  79.24, -96.23) 07/22/2017   11:24:24  (  79.23, -96.35)    2.94                24