Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 5 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)
 05/13/2018   19:13:12   (  69.05,-110.58) 05/13/2018   19:14:21  (  68.91,-109.08)   62.08                69
 05/13/2018   20:03:41   ( -68.27,  57.78) 05/13/2018   20:04:01  ( -68.24,  57.73)    2.94                20
 05/13/2018   20:54:25   (  68.14,-134.76) 05/13/2018   20:53:28  (  68.14,-134.74)    0.62                57
 05/16/2018   11:29:54   (  68.33,   6.15) 05/16/2018   11:31:02  (  68.35,   6.10)    2.83                68
 05/16/2018   12:20:36   ( -68.24, 173.58) 05/16/2018   12:20:32  ( -68.24, 173.60)    1.04                 4
 05/16/2018   13:11:15   (  67.85, -18.62) 05/16/2018   13:10:03  (  67.91, -19.14)   22.74                72
 05/19/2018   03:46:49   (  68.31, 121.94) 05/19/2018   03:47:33  (  68.34, 121.96)    3.31                44
 05/19/2018   04:37:30   ( -68.17, -70.55) 05/19/2018   04:37:04  ( -68.18, -70.60)    2.28                26
 05/21/2018   19:13:15   ( -69.27,  69.12) 05/21/2018   19:14:23  ( -69.17,  71.22)   83.48                68
 05/21/2018   20:03:43   (  68.30,-122.26) 05/21/2018   20:04:04  (  68.27,-122.25)    2.60                21
 05/21/2018   20:54:24   ( -68.15,  45.24) 05/21/2018   20:53:34  ( -68.17,  45.26)    2.63                50
 05/24/2018   11:29:55   ( -68.45,-174.00) 05/24/2018   11:31:07  ( -68.43,-173.83)    7.11                72
 05/24/2018   12:20:37   (  68.23,  -6.40) 05/24/2018   12:20:35  (  68.26,  -6.40)    3.31                 2
 05/24/2018   13:11:18   ( -68.08, 161.10) 05/24/2018   13:10:06  ( -68.10, 161.05)    3.26                72