Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 21.  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   ( -79.69,  86.96) 12/21/2017   11:24:52  ( -79.69,  87.04)    1.72                17
 12/21/2017   12:14:29   (  79.91,-103.68) 12/21/2017   12:15:29  (  79.91,-103.55)    2.82                60
 12/24/2017   02:52:18   (  79.47,  33.67) 12/24/2017   02:51:06  (  79.47,  33.67)    0.23                72
 12/24/2017   03:41:39   ( -79.70,-157.08) 12/24/2017   03:41:45  ( -79.69,-157.20)    2.37                 6
 12/26/2017   19:08:45   (  79.62, 150.63) 12/26/2017   19:07:55  (  79.63, 150.78)    3.15                50
 12/26/2017   19:58:07   ( -79.81, -40.35) 12/26/2017   19:58:35  ( -79.81, -40.32)    0.63                28
 12/29/2017   11:25:15   (  79.66, -93.25) 12/29/2017   11:24:48  (  79.66, -93.22)    0.55                27
 12/29/2017   12:14:37   ( -79.84,  75.80) 12/29/2017   12:15:28  ( -79.84,  75.70)    2.11                51
 01/01/2018   03:41:45   (  79.69,  22.84) 01/01/2018   03:41:41  (  79.68,  22.77)    1.36                 4
 01/01/2018   04:31:05   ( -79.94,-167.53) 01/01/2018   04:32:18  ( -79.95,-167.42)    2.31                73
 01/03/2018   19:08:51   ( -79.60, -29.55) 01/03/2018   19:07:52  ( -79.61, -29.44)    2.14                59