Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 9.  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)
 12/10/2017   19:08:33   (  79.59, 150.40) 12/10/2017   19:08:04  (  79.59, 150.41)    0.50                29
 12/10/2017   19:57:55   ( -79.78, -40.58) 12/10/2017   19:58:44  ( -79.77, -40.69)    2.28                49
 12/13/2017   11:25:00   (  79.72, -92.80) 12/13/2017   11:24:54  (  79.72, -92.67)    2.78                 6
 12/13/2017   12:14:22   ( -79.90,  76.26) 12/13/2017   12:15:34  ( -79.90,  76.27)    0.27                72
 12/16/2017   02:52:10   ( -79.47,-146.35) 12/16/2017   02:51:11  ( -79.46,-146.45)    2.12                59
 12/16/2017   03:41:29   (  79.73,  23.15) 12/16/2017   03:41:47  (  79.73,  23.11)    0.79                18
 12/18/2017   19:08:36   ( -79.62, -29.36) 12/18/2017   19:08:00  ( -79.63, -29.30)    1.20                36
 12/18/2017   19:57:56   (  79.84, 139.90) 12/18/2017   19:58:37  (  79.85, 140.03)    2.61                41
 12/21/2017   11:25:05   ( -79.66,  86.79) 12/21/2017   11:24:53  ( -79.66,  86.73)    1.39                12