Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 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)
 12/18/2017   19:08:40   ( -79.58, -29.68) 12/18/2017   19:08:01  ( -79.58, -29.68)    0.02                39
 12/18/2017   19:57:59   (  79.84, 139.90) 12/18/2017   19:58:37  (  79.84, 139.97)    1.19                38
 12/21/2017   11:25:09   ( -79.67,  86.85) 12/21/2017   11:24:52  ( -79.68,  86.93)    1.59                17
 12/21/2017   12:14:28   (  79.93,-103.54) 12/21/2017   12:15:28  (  79.93,-103.39)    2.85                60
 12/24/2017   02:52:18   (  79.49,  33.81) 12/24/2017   02:51:06  (  79.49,  33.81)    0.13                72
 12/24/2017   03:41:40   ( -79.68,-157.19) 12/24/2017   03:41:46  ( -79.68,-157.31)    2.60                 6
 12/26/2017   19:08:46   (  79.61, 150.52) 12/26/2017   19:07:56  (  79.62, 150.66)    2.90                50
 12/26/2017   19:58:08   ( -79.80, -40.44) 12/26/2017   19:58:36  ( -79.80, -40.43)    0.26                28
 12/29/2017   11:25:15   (  79.65, -93.33) 12/29/2017   11:24:48  (  79.65, -93.33)    0.13                27