Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 23.  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)
 04/25/2017   11:25:09   ( -79.33,  84.30) 04/25/2017   11:24:28  ( -79.33,  84.33)    0.61                41
 04/25/2017   12:14:27   (  79.63,-105.97) 04/25/2017   12:15:03  (  79.64,-105.83)    2.93                36
 04/28/2017   03:41:35   ( -79.37,-159.57) 04/28/2017   03:41:23  ( -79.36,-159.71)    3.03                12
 04/28/2017   04:30:53   (  79.67,  10.16) 04/28/2017   04:31:58  (  79.66,  10.14)    0.53                65
 04/30/2017   19:08:39   (  79.19, 147.56) 04/30/2017   19:07:38  (  79.19, 147.45)    2.24                61
 04/30/2017   19:57:57   ( -79.54, -42.47) 04/30/2017   19:58:13  ( -79.54, -42.42)    1.06                16
 05/03/2017   11:25:02   (  79.29, -95.96) 05/03/2017   11:24:30  (  79.28, -96.11)    3.15                32
 05/03/2017   12:14:21   ( -79.60,  73.79) 05/03/2017   12:15:06  ( -79.60,  73.79)    0.02                45
 05/06/2017   03:41:25   (  79.41,  20.72) 05/06/2017   03:41:22  (  79.40,  20.60)    2.76                 3