Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 8 15.  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)
 08/15/2017   10:36:02   (  77.38, -93.17) 08/15/2017   10:34:48  (  77.52, -93.70)   19.70                74
 08/15/2017   11:24:43   ( -79.35,  84.51) 08/15/2017   11:24:46  ( -79.35,  84.49)    0.52                 3
 08/18/2017   02:51:48   (  79.20,  31.78) 08/18/2017   02:51:02  (  79.20,  31.83)    1.16                46
 08/18/2017   03:41:10   ( -79.40,-159.28) 08/18/2017   03:41:42  ( -79.40,-159.35)    1.56                32
 08/20/2017   19:08:14   (  79.28, 148.19) 08/20/2017   19:07:57  (  79.28, 148.22)    0.63                17
 08/20/2017   19:57:35   ( -79.52, -42.58) 08/20/2017   19:58:36  ( -79.51, -42.67)    2.06                61
 08/23/2017   10:35:21   ( -79.05,  95.00) 08/23/2017   10:34:16  ( -79.05,  94.94)    1.51                65
 08/23/2017   11:24:38   (  79.40, -95.17) 08/23/2017   11:24:50  (  79.40, -95.13)    0.69                12
 08/26/2017   02:51:46   ( -79.17,-148.41) 08/26/2017   02:51:10  ( -79.16,-148.45)    1.07                36
 08/26/2017   03:41:04   (  79.47,  21.21) 08/26/2017   03:41:45  (  79.47,  21.26)    1.28                41
 08/28/2017   19:08:10   ( -79.31, -31.58) 08/28/2017   19:08:03  ( -79.31, -31.58)    0.28                 7