Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 10 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)
 10/21/2017   02:51:50   (  79.51,  33.88) 10/21/2017   02:51:23  (  79.51,  33.88)    0.02                27
 10/21/2017   03:41:11   ( -79.74,-156.80) 10/21/2017   03:42:01  ( -79.74,-156.80)    0.09                50
 10/23/2017   19:08:16   (  79.61, 150.48) 10/23/2017   19:08:15  (  79.61, 150.49)    0.28                 1
 10/23/2017   19:56:15   ( -81.75, -10.90) 10/23/2017   19:57:29  ( -81.33, -10.68)   47.67                74
 10/26/2017   10:35:23   ( -79.46,  97.66) 10/26/2017   10:34:30  ( -79.47,  97.75)    2.03                53
 10/26/2017   11:24:42   (  79.71, -92.94) 10/26/2017   11:25:07  (  79.71, -92.88)    1.30                25
 10/29/2017   02:51:51   ( -79.48,-146.34) 10/29/2017   02:51:25  ( -79.47,-146.46)    2.61                26
 10/29/2017   03:41:07   (  79.83,  23.88) 10/29/2017   03:41:58  (  79.83,  24.04)    3.12                51
 10/31/2017   18:21:31   (  71.78, 136.48) 10/31/2017   18:20:18  (  72.12, 134.43)   80.24                73
 10/31/2017   19:08:15   ( -79.60, -29.58) 10/31/2017   19:08:15  ( -79.60, -29.58)    0.25                 0
 11/03/2017   10:35:18   (  79.51, -81.99) 11/03/2017   10:34:27  (  79.52, -81.84)    3.12                51