Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 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)
 04/20/2017   03:41:38   (  79.44,  20.90) 04/20/2017   03:41:18  (  79.44,  20.96)    1.11                20
 04/20/2017   04:31:00   ( -79.63,-170.12) 04/20/2017   04:31:58  ( -79.62,-170.20)    1.62                58
 04/22/2017   19:08:46   ( -79.19, -32.48) 04/22/2017   19:07:37  ( -79.19, -32.54)    1.15                69
 04/22/2017   19:58:03   (  79.53, 137.43) 04/22/2017   19:58:11  (  79.53, 137.49)    1.17                 8
 04/25/2017   11:25:10   ( -79.32,  84.23) 04/25/2017   11:24:29  ( -79.32,  84.21)    0.50                41
 04/25/2017   12:14:28   (  79.62,-106.08) 04/25/2017   12:15:04  (  79.62,-105.98)    1.97                36
 04/28/2017   03:41:33   ( -79.44,-159.08) 04/28/2017   03:41:20  ( -79.44,-159.04)    0.90                13
 04/28/2017   04:30:54   (  79.62,   9.84) 04/28/2017   04:31:59  (  79.61,   9.70)    2.86                65
 04/30/2017   19:08:38   (  79.24, 147.83) 04/30/2017   19:07:36  (  79.24, 147.82)    0.13                62