Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 7 13.  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)
 07/14/2017   11:24:50   ( -79.29,  84.12) 07/14/2017   11:24:25  ( -79.29,  84.14)    0.46                25
 07/14/2017   12:14:10   (  79.51,-106.78) 07/14/2017   12:15:03  (  79.50,-106.87)    1.88                53
 07/17/2017   02:53:43   (  74.06,  12.71) 07/17/2017   02:52:30  (  74.31,  11.13)   55.18                73
 07/17/2017   03:41:16   ( -79.38,-159.42) 07/17/2017   03:41:17  ( -79.38,-159.41)    0.38                 1
 07/19/2017   19:08:22   (  79.17, 147.46) 07/19/2017   19:07:32  (  79.17, 147.43)    0.74                50
 07/19/2017   19:57:42   ( -79.46, -43.00) 07/19/2017   19:58:09  ( -79.46, -42.96)    0.92                27
 07/22/2017   11:24:46   (  79.28, -95.93) 07/22/2017   11:24:22  (  79.28, -95.92)    0.17                24
 07/22/2017   12:14:06   ( -79.57,  73.67) 07/22/2017   12:14:59  ( -79.58,  73.76)    2.02                53
 07/25/2017   02:52:43   ( -76.92,-159.07) 07/25/2017   02:51:29  ( -77.07,-159.83)   25.21                74