Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 5 10.  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   ( -78.18,  -1.08) 05/11/2015   16:40:51  ( -78.18,  -1.07)    0.32                65
 05/11/2015   17:31:12   (  78.60, 168.66) 05/11/2015   17:31:25  (  78.59, 168.60)    1.44                13
 05/14/2015   08:58:19   ( -78.42, 115.95) 05/14/2015   08:57:40  ( -78.42, 116.06)    2.60                39
 05/14/2015   09:47:35   (  78.82, -74.23) 05/14/2015   09:48:14  (  78.83, -74.18)    1.20                39
 05/17/2015   01:14:43   ( -78.58,-127.34) 05/17/2015   01:14:31  ( -78.58,-127.24)    2.18                12
 05/17/2015   02:04:00   (  78.93,  42.28) 05/17/2015   02:05:06  (  78.94,  42.32)    0.97                66
 05/19/2015   16:41:51   (  78.17, 178.89) 05/19/2015   16:40:50  (  78.17, 178.87)    0.49                61
 05/19/2015   17:31:08   ( -78.62, -11.21) 05/19/2015   17:31:24  ( -78.62, -11.26)    1.06                16
 05/22/2015   08:58:13   (  78.36, -64.30) 05/22/2015   08:57:40  (  78.36, -64.32)    0.52                33