Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 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)
 04/20/2017   03:41:39   (  79.42,  20.75) 04/20/2017   03:41:19  (  79.42,  20.79)    1.03                20
 04/20/2017   04:31:01   ( -79.61,-170.29) 04/20/2017   04:31:59  ( -79.60,-170.37)    1.68                58
 04/22/2017   19:08:46   ( -79.21, -32.38) 04/22/2017   19:07:37  ( -79.20, -32.44)    1.29                69
 04/22/2017   19:58:04   (  79.51, 137.28) 04/22/2017   19:58:12  (  79.51, 137.32)    0.94                 8
 04/25/2017   11:25:10   ( -79.30,  84.09) 04/25/2017   11:24:29  ( -79.30,  84.05)    0.90                41
 04/25/2017   12:14:28   (  79.60,-106.22) 04/25/2017   12:15:04  (  79.60,-106.15)    1.57                36
 04/28/2017   03:41:34   ( -79.42,-159.21) 04/28/2017   03:41:21  ( -79.42,-159.20)    0.23                13
 04/28/2017   04:30:52   (  79.72,  10.52) 04/28/2017   04:31:56  (  79.72,  10.66)    2.90                64
 04/30/2017   19:08:39   (  79.22, 147.72) 04/30/2017   19:07:37  (  79.22, 147.67)    1.13                62
 04/30/2017   19:57:58   ( -79.54, -42.54) 04/30/2017   19:58:13  ( -79.54, -42.45)    2.01                15
 05/03/2017   11:25:02   (  79.37, -95.43) 05/03/2017   11:24:28  (  79.37, -95.36)    1.43                34