Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 16.  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)
 09/16/2018   02:56:46   (  68.96, 133.77) 09/16/2018   02:57:56  (  68.84, 134.87)   46.23                70
 09/16/2018   03:47:18   ( -68.34, -58.08) 09/16/2018   03:47:33  ( -68.33, -58.12)    1.47                15
 09/16/2018   04:38:02   (  68.21, 109.38) 09/16/2018   04:37:00  (  68.23, 109.40)    1.97                62
 09/18/2018   19:13:33   (  68.45,-109.78) 09/18/2018   19:14:31  (  68.44,-109.75)    2.26                58
 09/18/2018   20:04:14   ( -68.31,  57.72) 09/18/2018   20:04:01  ( -68.32,  57.75)    2.10                13
 09/18/2018   20:54:48   (  67.65,-134.14) 09/18/2018   20:53:38  (  67.65,-135.38)   52.50                70
 09/21/2018   11:30:28   (  68.37,   6.09) 09/21/2018   11:31:00  (  68.36,   6.05)    2.12                32
 09/21/2018   12:21:10   ( -68.28, 173.53) 09/21/2018   12:20:30  ( -68.25, 173.55)    3.28                40
 09/24/2018   02:56:46   ( -68.79, -46.00) 09/24/2018   02:57:57  ( -68.68, -45.33)   29.55                71
 09/24/2018   03:47:24   (  68.35, 121.89) 09/24/2018   03:47:28  (  68.34, 121.90)    1.32                 4
 09/24/2018   04:38:05   ( -68.20, -70.60) 09/24/2018   04:36:58  ( -68.23, -70.59)    3.39                67
 09/26/2018   19:13:35   ( -68.44,  70.23) 09/26/2018   19:14:28  ( -68.43,  70.25)    1.92                53
 09/26/2018   20:04:19   (  68.33,-122.32) 09/26/2018   20:03:55  (  68.31,-122.25)    3.35                24
 09/26/2018   20:54:47   ( -67.48,  46.06) 09/26/2018   20:53:38  ( -67.48,  44.42)   69.57                69
 09/29/2018   10:40:05   (  69.38,  17.40) 09/29/2018   10:41:12  (  69.28,  19.57)   85.70                67
 09/29/2018   11:30:30   ( -68.37,-173.91) 09/29/2018   11:30:56  ( -68.40,-173.91)    3.26                26
 09/29/2018   12:21:14   (  68.26,  -6.45) 09/29/2018   12:20:23  (  68.28,  -6.40)    3.34                51