Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 15.  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)
 04/17/2015   16:41:24   (  78.56,-178.91) 04/17/2015   16:41:04  (  78.56,-178.93)    0.63                20
 04/17/2015   17:30:42   ( -78.95,  -9.11) 04/17/2015   17:31:39  ( -78.95,  -9.14)    0.61                57
 04/20/2015   08:12:03   ( -67.62, 103.67) 04/20/2015   08:10:50  ( -67.90, 101.89)   81.13                73
 04/20/2015   08:57:51   (  78.73, -62.15) 04/20/2015   08:57:50  (  78.73, -62.10)    1.22                 1
 04/20/2015   09:45:41   ( -81.61, 136.47) 04/20/2015   09:46:55  ( -81.25, 136.90)   41.51                74
 04/23/2015   00:25:07   ( -78.24,-116.42) 04/23/2015   00:24:09  ( -78.23,-116.54)    2.93                58
 04/23/2015   01:14:19   (  78.82,  54.22) 04/23/2015   01:14:38  (  78.82,  54.24)    0.52                19
 04/25/2015   16:41:30   ( -78.48,   0.63) 04/25/2015   16:40:52  ( -78.48,   0.62)    0.21                38
 04/25/2015   17:30:47   (  78.84, 170.20) 04/25/2015   17:31:27  (  78.83, 170.08)    2.71                40
 04/28/2015   08:57:55   ( -78.64, 117.34) 04/28/2015   08:57:38  ( -78.64, 117.34)    0.10                17