Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 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)
 04/22/2017   19:08:46   ( -79.21, -32.38) 04/22/2017   19:07:37  ( -79.20, -32.43)    0.97                69
 04/22/2017   19:58:03   (  79.51, 137.30) 04/22/2017   19:58:11  (  79.52, 137.35)    1.22                 8
 04/25/2017   11:25:09   ( -79.33,  84.32) 04/25/2017   11:24:28  ( -79.33,  84.33)    0.13                41
 04/25/2017   12:14:27   (  79.63,-105.96) 04/25/2017   12:15:03  (  79.64,-105.84)    2.56                36
 04/28/2017   03:41:33   ( -79.45,-159.00) 04/28/2017   03:41:20  ( -79.46,-158.90)    2.29                13
 04/28/2017   04:30:54   (  79.64,   9.93) 04/28/2017   04:31:59  (  79.63,   9.86)    1.49                65
 04/30/2017   19:08:37   (  79.28, 148.14) 04/30/2017   19:07:35  (  79.29, 148.25)    2.30                62
 04/30/2017   19:57:59   ( -79.48, -42.89) 04/30/2017   19:58:15  ( -79.48, -42.94)    0.93                16
 05/03/2017   11:25:02   (  79.35, -95.56) 05/03/2017   11:24:29  (  79.35, -95.55)    0.28                33