Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 19.  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)
 04/20/2015   08:57:59   (  78.58, -62.99) 04/20/2015   08:57:54  (  78.58, -63.00)    0.27                 5
 04/20/2015   09:47:16   ( -79.01, 107.01) 04/20/2015   09:48:28  ( -79.01, 107.03)    0.52                72
 04/23/2015   00:25:18   ( -78.19,-116.75) 04/23/2015   00:24:10  ( -78.19,-116.76)    0.25                68
 04/23/2015   01:14:31   (  78.74,  53.71) 04/23/2015   01:14:40  (  78.75,  53.78)    1.72                 9
 04/25/2015   16:41:54   ( -78.21,  -0.83) 04/25/2015   16:40:59  ( -78.20,  -0.94)    2.58                55
 04/25/2015   17:31:07   (  78.75, 169.62) 04/25/2015   17:31:29  (  78.75, 169.60)    0.53                22
 04/28/2015   08:58:31   ( -78.29, 115.40) 04/28/2015   08:57:47  ( -78.28, 115.28)    2.84                44
 04/28/2015   09:47:44   (  78.83, -74.12) 04/28/2015   09:48:17  (  78.83, -74.15)    0.65                33
 05/01/2015   01:15:08   ( -78.43,-128.05) 05/01/2015   01:14:33  ( -78.43,-128.09)    0.96                35
 05/01/2015   02:04:22   (  78.92,  42.25) 05/01/2015   02:05:04  (  78.93,  42.31)    1.37                42
 05/03/2015   17:31:45   ( -78.64, -11.16) 05/03/2015   17:31:17  ( -78.65, -11.02)    3.07                28