Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 7 15.  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)
 07/17/2017   02:53:45   (  73.96,  12.48) 07/17/2017   02:52:32  (  74.21,  10.89)   56.17                73
 07/17/2017   03:41:16   ( -79.38,-159.42) 07/17/2017   03:41:17  ( -79.38,-159.41)    0.24                 1
 07/19/2017   19:08:22   (  79.17, 147.47) 07/19/2017   19:07:32  (  79.17, 147.43)    0.99                50
 07/19/2017   19:57:42   ( -79.46, -43.00) 07/19/2017   19:58:09  ( -79.46, -42.96)    0.74                27
 07/22/2017   11:24:46   (  79.28, -95.92) 07/22/2017   11:24:22  (  79.28, -95.92)    0.12                24
 07/22/2017   12:14:06   ( -79.57,  73.66) 07/22/2017   12:14:59  ( -79.58,  73.75)    1.85                53
 07/25/2017   02:52:44   ( -76.87,-159.24) 07/25/2017   02:51:30  ( -77.02,-160.02)   25.74                74
 07/25/2017   03:41:11   (  79.39,  20.67) 07/25/2017   03:41:13  (  79.40,  20.74)    1.49                 2
 07/27/2017   19:08:18   ( -79.21, -32.30) 07/27/2017   19:07:29  ( -79.20, -32.27)    0.52                49