Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 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)
 06/12/2018   04:37:31   (  68.22, 109.40) 06/12/2018   04:37:12  (  68.22, 109.41)    0.87                19
 06/12/2018   05:28:02   ( -67.56, -82.46) 06/12/2018   05:26:51  ( -67.62, -83.66)   51.39                71
 06/14/2018   20:03:41   ( -68.31,  57.76) 06/14/2018   20:04:15  ( -68.33,  57.77)    3.05                34
 06/14/2018   20:54:25   (  68.17,-134.76) 06/14/2018   20:53:43  (  68.16,-134.79)    1.16                42
 06/17/2018   11:30:00   (  68.76,   5.61) 06/17/2018   11:31:10  (  68.65,   6.40)   33.93                70
 06/17/2018   12:20:34   ( -68.26, 173.59) 06/17/2018   12:20:45  ( -68.27, 173.57)    2.22                11
 06/17/2018   13:11:18   (  68.12, -18.93) 06/17/2018   13:10:13  (  68.10, -18.99)    3.32                65
 06/20/2018   03:46:48   (  68.39, 121.88) 06/20/2018   03:47:45  (  68.37, 121.93)    3.32                57
 06/20/2018   04:37:28   ( -68.21, -70.57) 06/20/2018   04:37:16  ( -68.21, -70.62)    2.48                12
 06/20/2018   05:28:02   (  67.53,  97.58) 06/20/2018   05:26:52  (  67.59,  96.30)   54.62                70
 06/22/2018   20:03:41   (  68.29,-122.22) 06/22/2018   20:04:16  (  68.30,-122.28)    2.71                35
 06/22/2018   20:54:23   ( -68.21,  45.20) 06/22/2018   20:53:46  ( -68.20,  45.24)    1.76                37
 06/25/2018   11:30:02   ( -68.96,-174.64) 06/25/2018   11:31:12  ( -68.80,-173.43)   51.42                70
 06/25/2018   12:20:36   (  68.30,  -6.45) 06/25/2018   12:20:46  (  68.29,  -6.42)    1.93                10
 06/25/2018   13:11:17   ( -68.16, 161.04) 06/25/2018   13:10:17  ( -68.14, 161.04)    2.54                60