Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 4.  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)
 09/05/2017   19:08:12   (  79.36, 148.74) 09/05/2017   19:08:06  (  79.37, 148.88)    2.92                 6
 09/05/2017   19:57:34   ( -79.55, -42.32) 09/05/2017   19:58:46  ( -79.55, -42.33)    0.12                72
 09/08/2017   10:35:20   ( -79.14,  95.58) 09/08/2017   10:34:25  ( -79.15,  95.70)    2.68                55
 09/08/2017   11:24:40   (  79.38, -95.28) 09/08/2017   11:25:03  (  79.37, -95.33)    1.05                23
 09/11/2017   02:51:47   ( -79.20,-148.22) 09/11/2017   02:51:21  ( -79.19,-148.26)    0.98                26
 09/11/2017   03:41:05   (  79.50,  21.44) 09/11/2017   03:41:56  (  79.51,  21.53)    2.01                51
 09/13/2017   18:19:46   (  76.64, 148.21) 09/13/2017   18:18:32  (  76.81, 147.46)   26.98                74
 09/13/2017   19:08:11   ( -79.36, -31.29) 09/13/2017   19:08:13  ( -79.36, -31.18)    2.32                 2
 09/16/2017   10:35:18   (  79.07, -84.84) 09/16/2017   10:34:32  (  79.07, -84.95)    2.43                46