Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 2 15.  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)
 02/17/2018   10:39:09   (  69.02,  17.97) 02/17/2018   10:40:18  (  68.87,  19.35)   57.33                69
 02/17/2018   11:29:38   ( -68.25,-173.69) 02/17/2018   11:29:57  ( -68.27,-173.76)    3.52                19
 02/17/2018   12:20:23   (  68.17,  -6.28) 02/17/2018   12:19:24  (  68.15,  -6.25)    1.91                59
 02/20/2018   02:55:50   (  68.37, 134.61) 02/20/2018   02:56:56  (  68.37, 134.60)    0.45                66
 02/20/2018   03:46:31   ( -68.24, -57.91) 02/20/2018   03:46:26  ( -68.27, -57.88)    2.84                 5
 02/20/2018   04:37:10   (  67.84, 109.91) 02/20/2018   04:35:58  (  67.87, 109.29)   25.97                72
 02/22/2018   19:12:42   (  68.32,-109.54) 02/22/2018   19:13:26  (  68.31,-109.59)    2.47                44
 02/22/2018   20:03:23   ( -68.19,  57.95) 02/22/2018   20:02:56  ( -68.21,  57.93)    2.52                27
 02/25/2018   10:39:07   ( -69.30,-162.39) 02/25/2018   10:40:14  ( -69.20,-160.24)   85.42                67
 02/25/2018   11:29:35   (  68.32,   6.24) 02/25/2018   11:29:55  (  68.30,   6.28)    3.03                20
 02/25/2018   12:20:15   ( -68.13, 173.80) 02/25/2018   12:19:26  ( -68.15, 173.73)    3.05                49
 02/28/2018   02:55:44   ( -68.50, -45.52) 02/28/2018   02:56:55  ( -68.46, -45.29)   10.45                71
 02/28/2018   03:46:26   (  68.27, 122.08) 02/28/2018   03:46:23  (  68.28, 122.14)    2.81                 3
 02/28/2018   04:37:07   ( -68.13, -70.43) 02/28/2018   04:35:54  ( -68.13, -70.40)    0.95                73