Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 9 16.  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)
 09/16/2018   19:08:36   ( -79.24, -32.14) 09/16/2018   19:08:15  ( -79.25, -32.03)    2.44                21
 09/16/2018   19:57:57   (  79.43, 136.77) 09/16/2018   19:58:54  (  79.43, 136.70)    1.47                57
 09/19/2018   10:35:44   (  78.96, -85.60) 09/19/2018   10:34:34  (  78.96, -85.62)    0.44                70
 09/19/2018   11:25:02   ( -79.32,  84.29) 09/19/2018   11:25:09  ( -79.33,  84.39)    2.37                 7
 09/22/2018   02:52:08   (  79.12,  31.25) 09/22/2018   02:51:26  (  79.12,  31.27)    0.40                42
 09/22/2018   03:41:27   ( -79.44,-159.04) 09/22/2018   03:42:02  ( -79.45,-158.91)    2.69                35
 09/24/2018   19:08:33   (  79.24, 147.85) 09/24/2018   19:08:19  (  79.24, 147.91)    1.41                14
 09/24/2018   19:57:56   ( -79.40, -43.42) 09/24/2018   19:59:00  ( -79.40, -43.56)    3.03                64
 09/27/2018   10:35:41   ( -78.96,  94.43) 09/27/2018   10:34:38  ( -78.96,  94.38)    1.27                63
 09/27/2018   11:24:57   (  79.35, -95.56) 09/27/2018   11:25:11  (  79.35, -95.43)    2.85                14
 09/30/2018   02:52:05   ( -79.12,-148.77) 09/30/2018   02:51:30  ( -79.12,-148.77)    0.16                35