Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 2 20.  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)
 02/20/2018   04:37:10   (  67.81, 109.94) 02/20/2018   04:35:58  (  67.89, 109.32)   27.19                72
 02/22/2018   19:12:42   (  68.35,-109.58) 02/22/2018   19:13:25  (  68.34,-109.55)    1.52                43
 02/22/2018   20:03:23   ( -68.22,  57.90) 02/22/2018   20:02:55  ( -68.23,  57.95)    2.33                28
 02/25/2018   10:39:07   ( -69.34,-162.44) 02/25/2018   10:40:14  ( -69.19,-160.25)   87.84                67
 02/25/2018   11:29:34   (  68.30,   6.27) 02/25/2018   11:29:55  (  68.30,   6.28)    0.68                21
 02/25/2018   12:20:15   ( -68.17, 173.75) 02/25/2018   12:19:25  ( -68.19, 173.79)    3.09                50
 02/28/2018   02:55:45   ( -68.54, -45.58) 02/28/2018   02:56:56  ( -68.49, -45.25)   14.16                71
 02/28/2018   03:46:26   (  68.25, 122.11) 02/28/2018   03:46:25  (  68.27, 122.12)    2.33                 1
 02/28/2018   04:37:07   ( -68.12, -70.41) 02/28/2018   04:35:56  ( -68.11, -70.43)    1.33                71
 03/02/2018   19:12:35   ( -68.38,  70.41) 03/02/2018   19:13:28  ( -68.37,  70.47)    3.17                53
 03/02/2018   20:03:18   (  68.20,-122.05) 03/02/2018   20:02:56  (  68.19,-122.09)    1.94                22
 03/02/2018   20:53:47   ( -67.42,  46.23) 03/02/2018   20:52:37  ( -67.48,  44.72)   64.54                70
 03/05/2018   11:29:25   ( -68.28,-173.68) 03/05/2018   11:29:58  ( -68.30,-173.73)    2.95                33
 03/05/2018   12:20:09   (  68.16,  -6.22) 03/05/2018   12:19:25  (  68.18,  -6.23)    2.42                44