Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 12 30.  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)
 12/31/2017   10:39:29   (  68.34,  18.77) 12/31/2017   10:40:27  (  68.37,  18.73)    3.25                58
 12/31/2017   11:30:11   ( -68.25,-173.80) 12/31/2017   11:29:57  ( -68.26,-173.77)    1.40                14
 12/31/2017   12:20:44   (  67.54,  -5.60) 12/31/2017   12:19:34  (  67.59,  -6.90)   55.29                70
 01/03/2018   02:56:22   (  68.30, 134.60) 01/03/2018   02:56:57  (  68.33, 134.56)    3.26                35
 01/03/2018   03:47:04   ( -68.21, -57.97) 01/03/2018   03:46:27  ( -68.22, -57.93)    1.99                37
 01/05/2018   18:22:42   ( -68.97,  82.18) 01/05/2018   18:23:52  ( -68.84,  83.43)   51.78                70
 01/05/2018   19:13:15   (  68.27,-109.58) 01/05/2018   19:13:27  (  68.28,-109.61)    2.33                12
 01/05/2018   20:03:57   ( -68.17,  57.86) 01/05/2018   20:02:57  ( -68.18,  57.89)    1.64                60
 01/08/2018   10:39:24   ( -68.40,-161.28) 01/08/2018   10:40:28  ( -68.40,-161.24)    1.60                64
 01/08/2018   11:30:07   (  68.23,   6.24) 01/08/2018   11:29:56  (  68.22,   6.20)    1.92                11
 01/08/2018   12:20:43   ( -67.81, 174.08) 01/08/2018   12:19:31  ( -67.84, 173.38)   29.51                72
 01/11/2018   02:56:16   ( -68.31, -45.39) 01/11/2018   02:56:58  ( -68.33, -45.44)    3.25                42
 01/11/2018   03:47:00   (  68.20, 122.06) 01/11/2018   03:46:25  (  68.21, 122.07)    1.97                35