Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 5 6.  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)
 05/06/2015   08:58:18   (  78.42, -63.98) 05/06/2015   08:57:39  (  78.43, -63.86)    2.96                39
 05/06/2015   09:47:36   ( -78.82, 105.74) 05/06/2015   09:48:14  ( -78.82, 105.84)    2.34                38
 05/09/2015   01:14:48   (  78.38,  51.68) 05/09/2015   01:14:35  (  78.38,  51.57)    2.66                13
 05/09/2015   02:04:01   ( -78.98,-137.42) 05/09/2015   02:05:04  ( -78.99,-137.29)    2.94                63
 05/11/2015   16:41:56   ( -78.21,  -0.93) 05/11/2015   16:40:50  ( -78.22,  -0.87)    1.57                66
 05/11/2015   17:31:12   (  78.62, 168.79) 05/11/2015   17:31:24  (  78.62, 168.79)    0.15                12
 05/14/2015   08:58:23   ( -78.31, 115.41) 05/14/2015   08:57:43  ( -78.31, 115.41)    0.20                40
 05/14/2015   09:47:38   (  78.75, -74.62) 05/14/2015   09:48:16  (  78.75, -74.67)    1.27                38
 05/17/2015   01:14:47   ( -78.51,-127.69) 05/17/2015   01:14:33  ( -78.51,-127.66)    0.81                14
 05/17/2015   02:04:03   (  78.91,  42.12) 05/17/2015   02:05:07  (  78.91,  42.10)    0.46                64
 05/19/2015   16:41:56   (  78.11, 178.58) 05/19/2015   16:40:52  (  78.11, 178.51)    1.83                64