Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 3 16.  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)
 03/16/2015   16:41:21   (  78.80,-177.48) 03/16/2015   16:41:43  (  78.79,-177.58)    2.26                22
 03/19/2015   08:08:27   ( -78.61, 129.74) 03/19/2015   08:07:56  ( -78.61, 129.75)    0.37                31
 03/19/2015   08:57:41   (  79.09, -59.85) 03/19/2015   08:58:27  (  79.09, -59.78)    1.52                46
 03/22/2015   00:24:48   ( -78.84,-113.08) 03/22/2015   00:24:42  ( -78.85,-113.01)    1.61                 6
 03/22/2015   01:14:08   (  79.07,  55.93) 03/22/2015   01:15:20  (  79.07,  55.79)    3.08                72
 03/24/2015   15:51:56   (  78.45,-166.96) 03/24/2015   15:50:59  (  78.44,-167.03)    1.63                57
 03/24/2015   16:41:11   ( -78.96,   3.50) 03/24/2015   16:41:31  ( -78.96,   3.53)    0.80                20
 03/27/2015   08:08:13   (  78.74, -49.47) 03/27/2015   08:07:42  (  78.75, -49.40)    1.66                31
 03/27/2015   08:57:33   ( -79.04, 119.91) 03/27/2015   08:58:20  ( -79.04, 119.82)    2.18                47
 03/30/2015   00:24:32   (  78.96,  67.69) 03/30/2015   00:24:28  (  78.97,  67.82)    2.88                 4