Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 18.  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   19:08:41   ( -79.57, -29.78) 12/18/2017   19:08:02  ( -79.57, -29.79)    0.24                39
 12/18/2017   19:58:00   (  79.83, 139.80) 12/18/2017   19:58:38  (  79.83, 139.86)    1.11                38
 12/21/2017   11:25:09   ( -79.69,  87.02) 12/21/2017   11:24:52  ( -79.70,  87.10)    1.58                17
 12/21/2017   12:14:29   (  79.91,-103.64) 12/21/2017   12:15:29  (  79.92,-103.51)    2.76                60
 12/24/2017   02:52:18   (  79.48,  33.71) 12/24/2017   02:51:06  (  79.48,  33.71)    0.10                72
 12/24/2017   03:41:40   ( -79.67,-157.29) 12/24/2017   03:41:46  ( -79.66,-157.42)    2.64                 6
 12/26/2017   19:08:46   (  79.60, 150.42) 12/26/2017   19:07:56  (  79.61, 150.55)    2.80                50
 12/26/2017   19:58:08   ( -79.78, -40.55) 12/26/2017   19:58:36  ( -79.79, -40.54)    0.28                28
 12/29/2017   11:25:16   (  79.63, -93.44) 12/29/2017   11:24:49  (  79.63, -93.44)    0.10                27
 12/29/2017   12:14:38   ( -79.82,  75.61) 12/29/2017   12:15:29  ( -79.81,  75.48)    2.73                51
 01/01/2018   03:41:46   (  79.66,  22.67) 01/01/2018   03:41:42  (  79.66,  22.56)    2.24                 4