Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 12 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)
 12/21/2018   19:08:23   ( -79.63, -29.37) 12/21/2018   19:08:04  ( -79.64, -29.24)    2.98                19
 12/21/2018   19:57:45   (  79.78, 139.40) 12/21/2018   19:58:44  (  79.77, 139.28)    2.54                59
 12/24/2018   10:35:30   (  79.44, -82.43) 12/24/2018   10:34:18  (  79.44, -82.40)    0.75                72
 12/24/2018   11:24:52   ( -79.63,  86.54) 12/24/2018   11:24:58  ( -79.63,  86.47)    1.27                 6
 12/27/2018   02:51:57   (  79.55,  34.23) 12/27/2018   02:51:09  (  79.56,  34.38)    3.18                48
 12/27/2018   03:41:19   ( -79.74,-156.76) 12/27/2018   03:41:49  ( -79.75,-156.71)    1.21                30
 12/29/2018   19:08:26   (  79.59, 150.35) 12/29/2018   19:08:03  (  79.59, 150.33)    0.44                23
 12/29/2018   19:57:48   ( -79.78, -40.62) 12/29/2018   19:58:43  ( -79.77, -40.73)    2.45                55
 01/01/2019   10:36:45   ( -76.33,  83.07) 01/01/2019   10:35:31  ( -76.54,  81.98)   36.82                74
 01/01/2019   11:24:53   (  79.69, -93.01) 01/01/2019   11:24:54  (  79.70, -92.88)    2.79                 1
 01/04/2019   02:52:02   ( -79.47,-146.39) 01/04/2019   02:51:11  ( -79.46,-146.46)    1.49                51