Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 5 10.  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)
 05/11/2017   11:25:04   ( -79.30,  84.16) 05/11/2017   11:24:31  ( -79.30,  84.07)    1.96                33
 05/11/2017   12:14:22   (  79.61,-106.09) 05/11/2017   12:15:06  (  79.61,-106.04)    0.88                44
 05/14/2017   03:41:29   ( -79.47,-158.84) 05/14/2017   03:41:21  ( -79.48,-158.71)    2.79                 8
 05/14/2017   04:30:50   (  79.66,  10.15) 05/14/2017   04:32:00  (  79.66,  10.13)    0.53                70
 05/16/2017   19:08:38   (  79.21, 147.67) 05/16/2017   19:07:39  (  79.21, 147.65)    0.44                59
 05/16/2017   19:57:57   ( -79.52, -42.63) 05/16/2017   19:58:15  ( -79.53, -42.54)    1.77                18
 05/19/2017   11:25:04   (  79.33, -95.68) 05/19/2017   11:24:31  (  79.33, -95.70)    0.64                33
 05/19/2017   12:14:24   ( -79.60,  73.82) 05/19/2017   12:15:08  ( -79.61,  73.89)    1.36                44
 05/22/2017   03:41:30   (  79.41,  20.70) 05/22/2017   03:41:23  (  79.41,  20.69)    0.20                 7