Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 14.  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)
 04/17/2017   11:25:13   (  79.35, -95.55) 04/17/2017   11:24:25  (  79.36, -95.46)    1.83                48
 04/17/2017   12:14:35   ( -79.55,  73.43) 04/17/2017   12:15:05  ( -79.55,  73.38)    1.00                30
 04/20/2017   03:41:39   (  79.42,  20.77) 04/20/2017   03:41:19  (  79.42,  20.81)    0.83                20
 04/20/2017   04:31:01   ( -79.62,-170.23) 04/20/2017   04:31:59  ( -79.61,-170.33)    2.03                58
 04/22/2017   19:08:47   ( -79.18, -32.57) 04/22/2017   19:07:38  ( -79.17, -32.66)    1.90                69
 04/22/2017   19:58:04   (  79.52, 137.31) 04/22/2017   19:58:12  (  79.52, 137.34)    0.52                 8
 04/25/2017   11:25:10   ( -79.31,  84.17) 04/25/2017   11:24:29  ( -79.30,  84.09)    1.76                41
 04/25/2017   12:14:28   (  79.61,-106.17) 04/25/2017   12:15:04  (  79.61,-106.13)    0.84                36
 04/28/2017   03:41:35   ( -79.40,-159.37) 04/28/2017   03:41:22  ( -79.40,-159.42)    0.96                13