Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 10 19.  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   02:51:51   (  79.49,  33.75) 10/21/2017   02:51:24  (  79.49,  33.75)    0.24                27
 10/21/2017   03:41:12   ( -79.73,-156.91) 10/21/2017   03:42:02  ( -79.73,-156.92)    0.28                50
 10/23/2017   19:08:17   (  79.59, 150.35) 10/23/2017   19:08:16  (  79.60, 150.37)    0.50                 1
 10/23/2017   19:56:15   ( -81.76, -10.67) 10/23/2017   19:57:29  ( -81.33, -10.46)   48.02                74
 10/26/2017   10:35:22   ( -79.48,  97.79) 10/26/2017   10:34:29  ( -79.49,  97.90)    2.34                53
 10/26/2017   11:24:41   (  79.72, -92.82) 10/26/2017   11:25:06  (  79.73, -92.73)    1.76                25
 10/29/2017   02:51:50   ( -79.49,-146.22) 10/29/2017   02:51:24  ( -79.49,-146.31)    1.90                26
 10/29/2017   03:41:09   (  79.73,  23.16) 10/29/2017   03:42:01  (  79.73,  23.04)    2.49                52
 10/31/2017   18:21:18   (  72.49, 137.75) 10/31/2017   18:20:05  (  72.81, 135.81)   73.51                73
 10/31/2017   19:08:14   ( -79.65, -29.22) 10/31/2017   19:08:14  ( -79.65, -29.16)    1.17                 0