Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 11.  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)
 12/13/2017   11:24:59   (  79.72, -92.78) 12/13/2017   11:24:53  (  79.73, -92.64)    2.93                 6
 12/13/2017   12:14:21   ( -79.90,  76.27) 12/13/2017   12:15:33  ( -79.90,  76.29)    0.44                72
 12/16/2017   02:52:10   ( -79.47,-146.34) 12/16/2017   02:51:11  ( -79.47,-146.42)    1.62                59
 12/16/2017   03:41:29   (  79.73,  23.17) 12/16/2017   03:41:47  (  79.73,  23.15)    0.38                18
 12/18/2017   19:08:36   ( -79.62, -29.37) 12/18/2017   19:08:00  ( -79.63, -29.27)    2.17                36
 12/18/2017   19:57:58   (  79.77, 139.35) 12/18/2017   19:58:40  (  79.76, 139.21)    2.86                42
 12/21/2017   11:25:05   ( -79.66,  86.77) 12/21/2017   11:24:53  ( -79.66,  86.78)    0.33                12
 12/21/2017   12:14:24   (  79.91,-103.66) 12/21/2017   12:15:29  (  79.91,-103.58)    1.65                65
 12/24/2017   02:52:10   (  79.53,  34.12) 12/24/2017   02:51:04  (  79.54,  34.19)    1.38                66