Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 20.  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)
 04/23/2015   00:25:13   ( -78.28,-116.33) 04/23/2015   00:24:07  ( -78.28,-116.28)    1.05                66
 04/23/2015   01:14:30   (  78.65,  53.21) 04/23/2015   01:14:42  (  78.64,  53.13)    2.06                12
 04/25/2015   16:41:45   ( -78.36,  -0.05) 04/25/2015   16:40:55  ( -78.37,  -0.03)    0.63                50
 04/25/2015   17:31:02   (  78.73, 169.50) 04/25/2015   17:31:30  (  78.72, 169.41)    2.20                28
 04/28/2015   08:58:18   ( -78.41, 116.03) 04/28/2015   08:57:44  ( -78.40, 115.97)    1.31                34
 04/28/2015   09:47:31   (  78.93, -73.48) 04/28/2015   09:48:14  (  78.94, -73.38)    2.34                43
 05/01/2015   01:14:48   ( -78.58,-127.21) 05/01/2015   01:14:29  ( -78.59,-127.16)    1.43                19
 05/01/2015   02:04:05   (  78.94,  42.40) 05/01/2015   02:05:04  (  78.94,  42.35)    1.02                59
 05/03/2015   17:31:18   ( -78.72, -10.64) 05/03/2015   17:31:14  ( -78.73, -10.53)    2.61                 4