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   (  79.50,  33.78) 10/21/2017   02:51:24  (  79.50,  33.78)    0.19                27
 10/21/2017   03:41:12   ( -79.73,-156.89) 10/21/2017   03:42:02  ( -79.73,-156.89)    0.26                50
 10/23/2017   19:08:16   (  79.60, 150.38) 10/23/2017   19:08:15  (  79.60, 150.40)    0.45                 1
 10/23/2017   19:56:14   ( -81.76, -10.63) 10/23/2017   19:57:28  ( -81.33, -10.41)   48.06                74
 10/26/2017   10:35:22   ( -79.48,  97.82) 10/26/2017   10:34:29  ( -79.49,  97.93)    2.37                53
 10/26/2017   11:24:41   (  79.73, -92.78) 10/26/2017   11:25:06  (  79.73, -92.69)    1.70                25
 10/29/2017   02:51:50   ( -79.50,-146.18) 10/29/2017   02:51:24  ( -79.49,-146.27)    1.96                26
 10/29/2017   03:41:09   (  79.74,  23.21) 10/29/2017   03:42:01  (  79.73,  23.09)    2.63                52
 10/31/2017   18:21:20   (  72.39, 137.57) 10/31/2017   18:20:07  (  72.72, 135.62)   74.43                73
 10/31/2017   19:08:15   ( -79.62, -29.43) 10/31/2017   19:08:15  ( -79.63, -29.39)    1.00                 0