Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 9 21.  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)
 09/22/2018   02:52:09   (  79.11,  31.16) 09/22/2018   02:51:26  (  79.11,  31.19)    0.72                43
 09/22/2018   03:41:28   ( -79.42,-159.16) 09/22/2018   03:42:02  ( -79.43,-159.02)    3.11                34
 09/24/2018   19:08:35   (  79.22, 147.76) 09/24/2018   19:08:19  (  79.23, 147.84)    1.83                16
 09/24/2018   19:57:57   ( -79.42, -43.28) 09/24/2018   19:58:59  ( -79.42, -43.40)    2.58                62
 09/27/2018   10:35:44   ( -78.99,  94.55) 09/27/2018   10:34:38  ( -78.98,  94.53)    0.70                66
 09/27/2018   11:25:04   (  79.21, -96.41) 09/27/2018   11:25:16  (  79.21, -96.55)    3.11                12
 09/30/2018   02:52:09   ( -79.10,-148.89) 09/30/2018   02:51:30  ( -79.10,-148.86)    0.66                39
 09/30/2018   03:41:28   (  79.36,  20.41) 09/30/2018   03:42:07  (  79.36,  20.36)    1.30                39
 10/02/2018   19:08:34   ( -79.25, -32.09) 10/02/2018   19:08:22  ( -79.25, -31.98)    2.38                12
 10/02/2018   19:57:54   (  79.46, 136.98) 10/02/2018   19:59:00  (  79.47, 137.02)    0.89                66
 10/05/2018   10:35:43   (  78.93, -85.77) 10/05/2018   10:34:42  (  78.92, -85.87)    2.22                61