Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 10 18.  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)
 10/18/2017   10:35:24   (  79.41, -82.72) 10/18/2017   10:34:31  (  79.41, -82.70)    0.51                53
 10/18/2017   11:24:44   ( -79.68,  86.84) 10/18/2017   11:25:08  ( -79.68,  86.87)    0.56                24
 10/21/2017   02:51:50   (  79.51,  33.91) 10/21/2017   02:51:23  (  79.51,  33.91)    0.08                27
 10/21/2017   03:41:11   ( -79.75,-156.74) 10/21/2017   03:42:01  ( -79.75,-156.74)    0.04                50
 10/23/2017   19:08:16   (  79.62, 150.51) 10/23/2017   19:08:15  (  79.62, 150.53)    0.39                 1
 10/23/2017   19:56:14   ( -81.76, -10.41) 10/23/2017   19:57:28  ( -81.33, -10.21)   48.34                74
 10/26/2017   10:35:23   ( -79.46,  97.69) 10/26/2017   10:34:30  ( -79.47,  97.79)    2.30                53
 10/26/2017   11:24:42   (  79.71, -92.93) 10/26/2017   11:25:07  (  79.71, -92.85)    1.58                25
 10/29/2017   02:51:50   ( -79.48,-146.32) 10/29/2017   02:51:24  ( -79.47,-146.42)    2.08                26
 10/29/2017   03:41:09   (  79.72,  23.05) 10/29/2017   03:42:01  (  79.71,  22.92)    2.78                52
 10/31/2017   18:21:22   (  72.25, 137.31) 10/31/2017   18:20:09  (  72.58, 135.34)   75.77                73
 10/31/2017   19:08:14   ( -79.64, -29.33) 10/31/2017   19:08:14  ( -79.64, -29.29)    0.80                 0