Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 7.  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)
 04/09/2015   15:52:35   (  76.42,-175.42) 04/09/2015   15:51:21  (  76.52,-175.81)   15.38                74
 04/09/2015   16:41:10   ( -78.78,   2.32) 04/09/2015   16:41:12  ( -78.79,   2.45)    2.89                 2
 04/12/2015   08:08:17   (  78.45, -51.19) 04/12/2015   08:07:26  (  78.46, -51.09)    2.45                51
 04/12/2015   08:57:33   ( -78.93, 119.05) 04/12/2015   08:57:59  ( -78.93, 119.18)    2.97                26
 04/15/2015   00:24:41   (  78.53,  65.13) 04/15/2015   00:24:15  (  78.53,  65.11)    0.60                26
 04/15/2015   01:13:58   ( -78.97,-124.83) 04/15/2015   01:14:49  ( -78.97,-124.83)    0.19                51
 04/17/2015   15:55:37   ( -66.27, -13.57) 04/17/2015   15:54:24  ( -66.58, -15.44)   90.45                73
 04/17/2015   16:41:02   (  78.67,-178.23) 04/17/2015   16:41:01  (  78.67,-178.26)    0.65                 1
 04/17/2015   17:29:00   ( -81.47,  17.00) 04/17/2015   17:30:14  ( -81.14,  17.52)   36.98                74
 04/20/2015   08:08:09   ( -78.35, 128.33) 04/20/2015   08:07:16  ( -78.34, 128.26)    1.59                53