Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 12.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2018   11:30:23   ( -68.39,-173.92) 09/13/2018   11:31:05  ( -68.39,-173.93)    0.39                42
 09/13/2018   12:21:07   (  68.27,  -6.46) 09/13/2018   12:20:32  (  68.28,  -6.41)    2.34                35
 09/16/2018   02:56:47   (  68.99, 133.72) 09/16/2018   02:57:57  (  68.85, 134.89)   49.20                70
 09/16/2018   03:47:19   ( -68.36, -58.12) 09/16/2018   03:47:34  ( -68.35, -58.09)    1.49                15
 09/16/2018   04:38:02   (  68.19, 109.41) 09/16/2018   04:37:02  (  68.18, 109.35)    2.53                60
 09/18/2018   19:13:33   (  68.43,-109.75) 09/18/2018   19:14:33  (  68.42,-109.76)    0.68                60
 09/18/2018   20:04:15   ( -68.33,  57.69) 09/18/2018   20:04:03  ( -68.32,  57.75)    2.82                12
 09/18/2018   20:54:49   (  67.68,-134.18) 09/18/2018   20:53:38  (  67.75,-135.27)   46.65                71
 09/21/2018   11:30:28   (  68.40,   6.05) 09/21/2018   11:31:01  (  68.39,   6.08)    1.85                33
 09/21/2018   12:21:09   ( -68.25, 173.56) 09/21/2018   12:20:32  ( -68.23, 173.53)    2.33                37
 09/24/2018   02:56:47   ( -68.86, -46.10) 09/24/2018   02:57:58  ( -68.76, -45.23)   36.93                71
 09/24/2018   03:47:23   (  68.32, 121.92) 09/24/2018   03:47:31  (  68.31, 121.86)    3.03                 8
 09/24/2018   04:38:05   ( -68.22, -70.63) 09/24/2018   04:37:01  ( -68.21, -70.62)    1.71                64