Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 26.  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)
 04/28/2015   08:58:15   ( -78.35, 115.71) 04/28/2015   08:57:45  ( -78.35, 115.68)    0.76                30
 04/28/2015   09:47:28   (  78.89, -73.77) 04/28/2015   09:48:15  (  78.90, -73.67)    2.25                47
 05/01/2015   01:14:45   ( -78.50,-127.70) 05/01/2015   01:14:31  ( -78.50,-127.67)    0.82                14
 05/01/2015   02:04:02   (  78.86,  41.93) 05/01/2015   02:05:06  (  78.86,  41.83)    2.27                64
 05/03/2015   16:42:55   (  75.53, 169.24) 05/03/2015   16:41:41  (  75.67, 168.66)   21.87                74
 05/03/2015   17:31:18   ( -78.53, -11.67) 05/03/2015   17:31:20  ( -78.53, -11.71)    1.06                 2
 05/06/2015   08:58:31   (  78.22, -65.02) 05/06/2015   08:57:31  (  78.22, -64.98)    0.91                60
 05/06/2015   09:47:48   ( -78.67, 104.91) 05/06/2015   09:48:05  ( -78.67, 104.91)    0.10                17
 05/09/2015   01:15:05   (  78.25,  50.97) 05/09/2015   01:14:20  (  78.24,  50.90)    1.51                45