Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 5 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)
 05/19/2018   03:46:49   (  68.34, 121.91) 05/19/2018   03:47:33  (  68.31, 121.92)    3.32                44
 05/19/2018   04:37:30   ( -68.20, -70.59) 05/19/2018   04:37:03  ( -68.20, -70.58)    0.53                27
 05/21/2018   19:13:16   ( -69.30,  69.08) 05/21/2018   19:14:23  ( -69.17,  71.22)   85.73                67
 05/21/2018   20:03:43   (  68.27,-122.23) 05/21/2018   20:04:04  (  68.29,-122.24)    1.84                21
 05/21/2018   20:54:25   ( -68.18,  45.20) 05/21/2018   20:53:34  ( -68.18,  45.27)    2.78                51
 05/24/2018   11:29:55   ( -68.43,-173.97) 05/24/2018   11:31:07  ( -68.42,-173.85)    5.19                72
 05/24/2018   12:20:38   (  68.26,  -6.44) 05/24/2018   12:20:35  (  68.25,  -6.40)    1.46                 3
 05/24/2018   13:11:19   ( -68.11, 161.06) 05/24/2018   13:10:06  ( -68.09, 161.04)    2.34                73
 05/27/2018   03:46:47   ( -68.31, -58.04) 05/27/2018   03:47:38  ( -68.33, -58.08)    2.72                51
 05/27/2018   04:37:31   (  68.19, 109.42) 05/27/2018   04:37:05  (  68.21, 109.42)    2.47                26
 05/27/2018   05:27:57   ( -67.24, -82.10) 05/27/2018   05:26:49  ( -67.33, -83.96)   80.40                68
 05/29/2018   19:13:17   (  69.30,-110.93) 05/29/2018   19:14:24  (  69.22,-108.73)   86.98                67
 05/29/2018   20:03:42   ( -68.30,  57.74) 05/29/2018   20:04:09  ( -68.28,  57.73)    1.86                27
 05/29/2018   20:54:26   (  68.18,-134.80) 05/29/2018   20:53:36  (  68.16,-134.76)    2.44                50