Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 6 20.  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)
 06/23/2017   02:52:03   ( -78.95,-149.77) 06/23/2017   02:50:49  ( -78.96,-149.84)    2.28                74
 06/23/2017   03:41:18   (  79.37,  20.51) 06/23/2017   03:41:22  (  79.36,  20.42)    1.95                 4
 06/25/2017   19:08:23   ( -79.23, -32.14) 06/25/2017   19:07:36  ( -79.24, -32.09)    1.20                47
 06/25/2017   19:57:42   (  79.49, 137.20) 06/25/2017   19:58:13  (  79.49, 137.20)    0.15                31
 06/28/2017   11:24:48   ( -79.27,  84.01) 06/28/2017   11:24:29  ( -79.27,  83.90)    2.63                19
 06/28/2017   12:14:04   (  79.64,-105.86) 06/28/2017   12:15:02  (  79.64,-105.73)    2.76                58
 07/01/2017   02:51:51   (  79.13,  31.36) 07/01/2017   02:50:42  (  79.13,  31.37)    0.28                69
 07/01/2017   03:41:11   ( -79.43,-159.10) 07/01/2017   03:41:19  ( -79.43,-159.07)    0.62                 8
 07/03/2017   19:08:16   (  79.20, 147.67) 07/03/2017   19:07:35  (  79.19, 147.57)    2.32                41