Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 5 11.  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)
 05/11/2015   16:41:56   ( -78.16,  -1.19) 05/11/2015   16:40:51  ( -78.16,  -1.17)    0.67                65
 05/11/2015   17:31:11   (  78.62, 168.77) 05/11/2015   17:31:24  (  78.61, 168.73)    0.97                13
 05/14/2015   08:58:22   ( -78.26, 115.16) 05/14/2015   08:57:44  ( -78.25, 115.07)    2.27                38
 05/14/2015   09:47:34   (  78.83, -74.17) 05/14/2015   09:48:13  (  78.85, -74.05)    2.63                39
 05/17/2015   01:14:45   ( -78.45,-128.00) 05/17/2015   01:14:34  ( -78.45,-128.05)    1.26                11
 05/17/2015   02:04:01   (  78.85,  41.81) 05/17/2015   02:05:08  (  78.84,  41.70)    2.42                67
 05/19/2015   16:41:52   (  78.11, 178.60) 05/19/2015   16:40:52  (  78.11, 178.52)    1.86                60
 05/19/2015   17:31:08   ( -78.60, -11.31) 05/19/2015   17:31:25  ( -78.59, -11.41)    2.50                17
 05/22/2015   08:58:10   (  78.41, -64.08) 05/22/2015   08:57:38  (  78.41, -64.05)    0.65                32
 05/22/2015   09:47:27   ( -78.85, 105.91) 05/22/2015   09:48:12  ( -78.85, 105.92)    0.33                45
 05/25/2015   01:14:31   (  78.58,  52.69) 05/25/2015   01:14:28  (  78.58,  52.73)    0.89                 3