Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 6 21.  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   02:52:45   ( -77.17,-158.14) 06/23/2017   02:51:31  ( -77.31,-158.85)   23.26                74
 06/23/2017   03:41:20   (  79.34,  20.33) 06/23/2017   03:41:23  (  79.34,  20.21)    2.49                 3
 06/25/2017   19:08:26   ( -79.24, -32.11) 06/25/2017   19:07:36  ( -79.25, -32.04)    1.82                50
 06/25/2017   19:57:45   (  79.49, 137.23) 06/25/2017   19:58:13  (  79.50, 137.26)    0.55                28
 06/28/2017   11:24:53   ( -79.27,  84.00) 06/28/2017   11:24:29  ( -79.27,  83.95)    1.08                24
 06/28/2017   12:14:12   (  79.53,-106.66) 06/28/2017   12:15:06  (  79.52,-106.77)    2.27                54
 07/01/2017   02:53:15   (  75.63,  16.74) 07/01/2017   02:52:02  (  75.82,  15.49)   39.96                73
 07/01/2017   03:41:17   ( -79.46,-158.89) 07/01/2017   03:41:18  ( -79.47,-158.75)    3.02                 1
 07/03/2017   19:08:24   (  79.23, 147.83) 07/03/2017   19:07:34  (  79.23, 147.88)    1.03                50