Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 12 19.  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)
 12/21/2015   17:29:48   (  79.00, 171.20) 12/21/2015   17:28:47  (  79.00, 171.17)    0.61                61
 12/21/2015   18:19:05   ( -79.40, -18.64) 12/21/2015   18:19:21  ( -79.40, -18.57)    1.42                16
 12/24/2015   09:46:12   (  79.22, -71.56) 12/24/2015   09:45:34  (  79.23, -71.43)    2.97                38
 12/24/2015   10:35:34   ( -79.42,  97.40) 12/24/2015   10:36:14  ( -79.42,  97.33)    1.61                40
 12/27/2015   02:02:39   (  79.31,  44.86) 12/27/2015   02:02:25  (  79.31,  44.96)    2.30                14
 12/27/2015   02:52:01   ( -79.51,-146.14) 12/27/2015   02:53:05  ( -79.50,-146.26)    2.55                64
 12/29/2015   17:29:49   ( -79.03,  -8.62) 12/29/2015   17:28:42  ( -79.03,  -8.62)    0.13                67
 12/29/2015   18:19:08   (  79.30, 160.68) 12/29/2015   18:19:19  (  79.29, 160.56)    2.65                11
 01/01/2016   09:46:11   ( -79.25, 108.59) 01/01/2016   09:45:28  ( -79.25, 108.73)    3.15                43