Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 3 17.  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)
 03/18/2018   19:12:44   ( -68.31,  70.45) 03/18/2018   19:13:35  ( -68.32,  70.42)    1.05                51
 03/18/2018   20:03:28   (  68.18,-122.07) 03/18/2018   20:03:02  (  68.20,-122.07)    2.37                26
 03/18/2018   20:53:54   ( -67.24,  46.39) 03/18/2018   20:52:46  ( -67.32,  44.55)   79.45                68
 03/21/2018   10:39:15   (  69.34,  17.51) 03/21/2018   10:40:21  (  69.26,  19.84)   92.16                66
 03/21/2018   11:29:39   ( -68.29,-173.76) 03/21/2018   11:30:07  ( -68.27,-173.77)    2.70                28
 03/21/2018   12:20:23   (  68.16,  -6.29) 03/21/2018   12:19:34  (  68.15,  -6.26)    1.79                49
 03/24/2018   02:55:57   (  68.58, 134.32) 03/24/2018   02:57:08  (  68.49, 134.73)   19.32                71
 03/24/2018   03:46:34   ( -68.22, -57.90) 03/24/2018   03:46:41  ( -68.23, -57.95)    2.38                 7
 03/24/2018   04:37:18   (  68.10, 109.57) 03/24/2018   04:36:08  (  68.11, 109.56)    1.83                70
 03/26/2018   19:12:49   (  68.35,-109.62) 03/26/2018   19:13:45  (  68.35,-109.58)    1.35                56
 03/26/2018   20:03:30   ( -68.20,  57.89) 03/26/2018   20:03:16  ( -68.20,  57.87)    0.97                14
 03/26/2018   20:54:03   (  67.49,-133.92) 03/26/2018   20:52:53  (  67.52,-135.27)   57.42                70
 03/29/2018   11:29:44   (  68.28,   6.23) 03/29/2018   11:30:22  (  68.27,   6.17)    3.22                38
 03/29/2018   12:20:26   ( -68.19, 173.68) 03/29/2018   12:19:52  ( -68.17, 173.70)    1.59                34