Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 12 18.  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)
 12/19/2018   02:51:55   ( -79.53,-145.95) 12/19/2018   02:51:12  ( -79.53,-145.90)    1.10                43
 12/19/2018   03:41:15   (  79.76,  23.35) 12/19/2018   03:41:49  (  79.76,  23.44)    2.08                34
 12/21/2018   19:08:22   ( -79.65, -29.22) 12/21/2018   19:08:03  ( -79.65, -29.08)    2.97                19
 12/21/2018   19:57:45   (  79.76, 139.26) 12/21/2018   19:58:44  (  79.76, 139.15)    2.43                59
 12/24/2018   10:35:31   (  79.42, -82.56) 12/24/2018   10:34:19  (  79.43, -82.52)    0.85                72
 12/24/2018   11:24:52   ( -79.65,  86.69) 12/24/2018   11:24:58  ( -79.65,  86.63)    1.22                 6
 12/27/2018   02:52:00   (  79.46,  33.57) 12/27/2018   02:51:13  (  79.45,  33.44)    3.02                47
 12/27/2018   03:41:19   ( -79.76,-156.61) 12/27/2018   03:41:49  ( -79.77,-156.54)    1.32                30
 12/29/2018   19:08:26   (  79.57, 150.21) 12/29/2018   19:08:03  (  79.57, 150.21)    0.19                23
 12/29/2018   19:57:48   ( -79.76, -40.74) 12/29/2018   19:58:43  ( -79.76, -40.86)    2.25                55
 01/01/2019   10:36:43   ( -76.41,  83.31) 01/01/2019   10:35:29  ( -76.61,  82.24)   36.02                74