Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 4.  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)
 04/06/2017   19:58:11   (  79.48, 137.06) 04/06/2017   19:58:08  (  79.48, 137.02)    0.86                 3
 04/06/2017   20:47:16   ( -80.27, -49.05) 04/06/2017   20:48:30  ( -80.19, -48.79)    9.71                74
 04/09/2017   11:25:18   ( -79.31,  84.14) 04/09/2017   11:24:25  ( -79.31,  84.13)    0.31                53
 04/09/2017   12:14:36   (  79.60,-106.20) 04/09/2017   12:15:00  (  79.61,-106.10)    2.17                24
 04/12/2017   03:41:45   ( -79.35,-159.70) 04/12/2017   03:41:20  ( -79.34,-159.83)    2.77                25
 04/12/2017   04:31:03   (  79.64,   9.96) 04/12/2017   04:31:55  (  79.64,   9.95)    0.29                52
 04/14/2017   19:09:49   (  76.57, 135.50) 04/14/2017   19:08:35  (  76.77, 134.61)   31.87                74
 04/14/2017   19:58:08   ( -79.54, -42.55) 04/14/2017   19:58:10  ( -79.54, -42.45)    2.13                 2
 04/17/2017   11:25:14   (  79.28, -96.03) 04/17/2017   11:24:27  (  79.28, -96.11)    1.78                47