Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 13.  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)
 06/14/2018   20:03:41   ( -68.33,  57.72) 06/14/2018   20:04:15  ( -68.31,  57.74)    2.38                34
 06/14/2018   20:54:25   (  68.19,-134.79) 06/14/2018   20:53:42  (  68.20,-134.75)    1.82                43
 06/17/2018   11:30:00   (  68.73,   5.65) 06/17/2018   11:31:11  (  68.63,   6.37)   31.06                71
 06/17/2018   12:20:35   ( -68.28, 173.56) 06/17/2018   12:20:46  ( -68.25, 173.55)    3.40                11
 06/17/2018   13:11:19   (  68.14, -18.96) 06/17/2018   13:10:13  (  68.13, -18.95)    1.28                66
 06/20/2018   03:46:48   (  68.36, 121.91) 06/20/2018   03:47:46  (  68.34, 121.89)    2.56                58
 06/20/2018   04:37:29   ( -68.23, -70.60) 06/20/2018   04:37:16  ( -68.24, -70.59)    1.28                13
 06/20/2018   05:28:02   (  67.50,  97.61) 06/20/2018   05:26:53  (  67.56,  96.27)   57.44                69
 06/22/2018   20:03:41   (  68.32,-122.25) 06/22/2018   20:04:15  (  68.33,-122.25)    0.91                34
 06/22/2018   20:54:22   ( -68.19,  45.23) 06/22/2018   20:53:46  ( -68.18,  45.21)    1.55                36
 06/25/2018   11:30:01   ( -68.94,-174.61) 06/25/2018   11:31:11  ( -68.82,-173.41)   49.93                70
 06/25/2018   12:20:35   (  68.28,  -6.42) 06/25/2018   12:20:46  (  68.25,  -6.46)    3.01                11
 06/25/2018   13:11:16   ( -68.14, 161.06) 06/25/2018   13:10:16  ( -68.16, 161.06)    2.15                60