Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 22.  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   ( -79.34,  84.39) 04/25/2017   11:24:28  ( -79.34,  84.41)    0.39                41
 04/25/2017   12:14:28   (  79.61,-106.15) 04/25/2017   12:15:04  (  79.62,-106.02)    2.78                36
 04/28/2017   03:41:33   ( -79.46,-158.95) 04/28/2017   03:41:20  ( -79.47,-158.82)    2.82                13
 04/28/2017   04:30:54   (  79.64,   9.99) 04/28/2017   04:31:59  (  79.64,   9.95)    0.97                65
 04/30/2017   19:08:39   (  79.17, 147.43) 04/30/2017   19:07:38  (  79.16, 147.29)    3.17                61
 04/30/2017   19:57:57   ( -79.53, -42.60) 04/30/2017   19:58:13  ( -79.52, -42.59)    0.22                16
 05/03/2017   11:25:00   (  79.39, -95.29) 05/03/2017   11:24:27  (  79.39, -95.21)    1.70                33
 05/03/2017   12:14:22   ( -79.58,  73.70) 05/03/2017   12:15:07  ( -79.58,  73.63)    1.61                45
 05/06/2017   03:41:24   (  79.48,  21.19) 05/06/2017   03:41:20  (  79.48,  21.26)    1.35                 4