Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 10.  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)
 09/10/2018   19:13:28   ( -68.44,  70.24) 09/10/2018   19:14:37  ( -68.42,  70.22)    2.79                69
 09/10/2018   20:04:12   (  68.32,-122.30) 09/10/2018   20:04:04  (  68.31,-122.27)    2.05                 8
 09/10/2018   20:54:50   ( -68.02,  45.41) 09/10/2018   20:53:37  ( -68.03,  45.04)   15.52                73
 09/13/2018   11:30:24   ( -68.41,-173.95) 09/13/2018   11:31:05  ( -68.43,-173.89)    3.43                41
 09/13/2018   12:21:07   (  68.24,  -6.42) 09/13/2018   12:20:33  (  68.26,  -6.44)    2.76                34
 09/16/2018   02:56:46   (  68.96, 133.77) 09/16/2018   02:57:56  (  68.88, 134.92)   46.59                70
 09/16/2018   03:47:18   ( -68.32, -58.07) 09/16/2018   03:47:34  ( -68.33, -58.12)    2.48                16
 09/16/2018   04:38:02   (  68.21, 109.39) 09/16/2018   04:37:01  (  68.21, 109.38)    0.87                61
 09/18/2018   19:13:33   (  68.44,-109.77) 09/18/2018   19:14:32  (  68.45,-109.74)    1.48                59
 09/18/2018   20:04:14   ( -68.29,  57.74) 09/18/2018   20:04:03  ( -68.29,  57.71)    1.44                11
 09/18/2018   20:54:48   (  67.64,-134.13) 09/18/2018   20:53:38  (  67.72,-135.31)   50.63                70
 09/21/2018   11:30:29   (  68.42,   6.03) 09/21/2018   11:31:01  (  68.40,   6.09)    2.73                32
 09/21/2018   12:21:10   ( -68.26, 173.55) 09/21/2018   12:20:32  ( -68.25, 173.54)    1.43                38