Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 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)
 12/21/2017   11:25:09   ( -79.68,  86.91) 12/21/2017   11:24:52  ( -79.68,  86.99)    1.74                17
 12/21/2017   12:14:29   (  79.90,-103.74) 12/21/2017   12:15:29  (  79.91,-103.61)    2.88                60
 12/24/2017   02:52:18   (  79.50,  33.88) 12/24/2017   02:51:06  (  79.50,  33.89)    0.27                72
 12/24/2017   03:41:40   ( -79.69,-157.13) 12/24/2017   03:41:46  ( -79.68,-157.25)    2.37                 6
 12/26/2017   19:08:45   (  79.62, 150.58) 12/26/2017   19:07:55  (  79.63, 150.73)    3.14                50
 12/26/2017   19:58:07   ( -79.80, -40.40) 12/26/2017   19:58:35  ( -79.80, -40.37)    0.59                28
 12/29/2017   11:25:15   (  79.65, -93.29) 12/29/2017   11:24:48  (  79.65, -93.27)    0.46                27
 12/29/2017   12:14:37   ( -79.84,  75.76) 12/29/2017   12:15:28  ( -79.83,  75.65)    2.20                51
 01/01/2018   03:41:45   (  79.68,  22.80) 01/01/2018   03:41:41  (  79.68,  22.73)    1.54                 4