Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 17.  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)
 09/19/2017   02:51:47   (  79.25,  32.13) 09/19/2017   02:51:23  (  79.26,  32.22)    2.04                24
 09/19/2017   03:41:09   ( -79.44,-158.96) 09/19/2017   03:42:03  ( -79.44,-159.05)    2.05                54
 09/21/2017   18:20:01   ( -76.19, -33.30) 09/21/2017   18:18:47  ( -76.37, -34.23)   31.45                74
 09/21/2017   19:08:17   (  79.28, 148.23) 09/21/2017   19:08:19  (  79.28, 148.21)    0.39                 2
 09/24/2017   10:35:26   ( -79.12,  95.43) 09/24/2017   10:34:36  ( -79.12,  95.47)    0.68                50
 09/24/2017   11:24:46   (  79.35, -95.45) 09/24/2017   11:25:14  (  79.35, -95.54)    2.04                28
 09/27/2017   02:51:55   ( -79.19,-148.27) 09/27/2017   02:51:31  ( -79.19,-148.30)    0.67                24
 09/27/2017   03:41:15   (  79.42,  20.85) 09/27/2017   03:42:09  (  79.41,  20.71)    3.00                54
 09/29/2017   18:20:08   (  76.02, 146.14) 09/29/2017   18:18:55  (  76.17, 145.06)   33.50                73