Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 20.  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)
 04/22/2017   19:08:46   ( -79.20, -32.43) 04/22/2017   19:07:37  ( -79.20, -32.48)    0.96                69
 04/22/2017   19:58:04   (  79.50, 137.24) 04/22/2017   19:58:12  (  79.51, 137.29)    1.29                 8
 04/25/2017   11:25:09   ( -79.33,  84.28) 04/25/2017   11:24:28  ( -79.33,  84.28)    0.08                41
 04/25/2017   12:14:27   (  79.63,-106.02) 04/25/2017   12:15:03  (  79.63,-105.90)    2.50                36
 04/28/2017   03:41:33   ( -79.44,-159.05) 04/28/2017   03:41:20  ( -79.45,-158.96)    2.01                13
 04/28/2017   04:30:54   (  79.63,   9.88) 04/28/2017   04:31:59  (  79.62,   9.79)    1.76                65
 04/30/2017   19:08:37   (  79.28, 148.10) 04/30/2017   19:07:35  (  79.28, 148.17)    1.74                62
 04/30/2017   19:57:59   ( -79.48, -42.94) 04/30/2017   19:58:15  ( -79.47, -43.01)    1.49                16
 05/03/2017   11:25:02   (  79.34, -95.60) 05/03/2017   11:24:29  (  79.34, -95.63)    0.71                33