Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 3.  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)
 04/04/2017   03:41:46   (  79.36,  20.35) 04/04/2017   03:41:16  (  79.35,  20.23)    2.80                30
 04/04/2017   04:31:06   ( -79.63,-170.12) 04/04/2017   04:31:53  ( -79.64,-170.09)    0.50                47
 04/06/2017   19:58:12   (  79.46, 136.87) 04/06/2017   19:58:09  (  79.45, 136.83)    0.98                 3
 04/06/2017   20:47:17   ( -80.25, -49.25) 04/06/2017   20:48:31  ( -80.17, -49.01)    9.32                74
 04/09/2017   11:25:19   ( -79.29,  83.98) 04/09/2017   11:24:26  ( -79.28,  83.95)    0.79                53
 04/09/2017   12:14:37   (  79.58,-106.37) 04/09/2017   12:15:01  (  79.59,-106.30)    1.68                24
 04/12/2017   03:41:43   ( -79.45,-159.08) 04/12/2017   03:41:17  ( -79.45,-158.96)    2.60                26
 04/12/2017   04:31:04   (  79.62,   9.81) 04/12/2017   04:31:56  (  79.62,   9.75)    1.29                52
 04/14/2017   19:09:59   (  76.06, 133.85) 04/14/2017   19:08:46  (  76.24, 132.64)   37.88                73
 04/14/2017   19:58:09   ( -79.48, -42.94) 04/14/2017   19:58:11  ( -79.49, -42.93)    0.44                 2
 04/17/2017   11:25:13   (  79.34, -95.62) 04/17/2017   11:24:25  (  79.35, -95.53)    2.03                48