Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 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)
 06/12/2018   03:46:47   ( -68.36, -58.08) 06/12/2018   03:47:45  ( -68.33, -58.10)    2.70                58
 06/12/2018   04:37:31   (  68.22, 109.40) 06/12/2018   04:37:12  (  68.22, 109.41)    0.38                19
 06/12/2018   05:28:02   ( -67.55, -82.46) 06/12/2018   05:26:51  ( -67.61, -83.66)   51.64                71
 06/14/2018   20:03:41   ( -68.30,  57.76) 06/14/2018   20:04:15  ( -68.32,  57.75)    1.40                34
 06/14/2018   20:54:25   (  68.17,-134.76) 06/14/2018   20:53:43  (  68.14,-134.81)    3.26                42
 06/17/2018   11:29:59   (  68.71,   5.69) 06/17/2018   11:31:10  (  68.61,   6.35)   29.03                71
 06/17/2018   12:20:35   ( -68.31, 173.53) 06/17/2018   12:20:44  ( -68.29, 173.60)    3.46                 9
 06/17/2018   13:11:18   (  68.12, -18.93) 06/17/2018   13:10:12  (  68.11, -18.97)    1.89                66
 06/20/2018   03:46:47   (  68.34, 121.95) 06/20/2018   03:47:44  (  68.35, 121.91)    1.78                57
 06/20/2018   04:37:29   ( -68.26, -70.63) 06/20/2018   04:37:14  ( -68.25, -70.57)    2.71                15
 06/20/2018   05:28:01   (  67.48,  97.64) 06/20/2018   05:26:52  (  67.51,  96.22)   60.60                69
 06/22/2018   20:03:41   (  68.29,-122.22) 06/22/2018   20:04:14  (  68.29,-122.28)    2.19                33
 06/22/2018   20:54:23   ( -68.21,  45.20) 06/22/2018   20:53:44  ( -68.20,  45.25)    2.29                39