Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 4 21.  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   00:25:11   ( -78.32,-116.14) 04/23/2015   00:24:06  ( -78.32,-116.05)    2.26                65
 04/23/2015   01:14:28   (  78.69,  53.42) 04/23/2015   01:14:41  (  78.68,  53.39)    0.77                13
 04/25/2015   16:41:45   ( -78.22,  -0.75) 04/25/2015   16:40:59  ( -78.21,  -0.88)    3.01                46
 04/25/2015   17:30:57   (  78.80, 169.89) 04/25/2015   17:31:28  (  78.80, 169.91)    0.55                31
 04/28/2015   08:58:12   ( -78.38, 115.90) 04/28/2015   08:57:45  ( -78.37, 115.78)    2.96                27
 04/28/2015   09:47:24   (  78.95, -73.39) 04/28/2015   09:48:14  (  78.95, -73.34)    0.89                50
 05/01/2015   01:14:34   ( -78.70,-126.54) 05/01/2015   01:14:26  ( -78.71,-126.43)    2.45                 8
 05/01/2015   02:03:52   (  79.01,  42.87) 05/01/2015   02:05:02  (  79.01,  42.88)    0.32                70
 05/03/2015   16:41:43   (  78.32, 179.74) 05/03/2015   16:40:39  (  78.33, 179.80)    1.58                64