Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 5 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)
 05/21/2018   19:13:16   ( -69.30,  69.07) 05/21/2018   19:14:23  ( -69.16,  71.21)   85.94                67
 05/21/2018   20:03:43   (  68.27,-122.23) 05/21/2018   20:04:04  (  68.28,-122.24)    0.92                21
 05/21/2018   20:54:25   ( -68.19,  45.20) 05/21/2018   20:53:34  ( -68.17,  45.26)    3.47                51
 05/24/2018   11:29:55   ( -68.44,-173.98) 05/24/2018   11:31:07  ( -68.40,-173.86)    5.94                72
 05/24/2018   12:20:38   (  68.26,  -6.44) 05/24/2018   12:20:35  (  68.24,  -6.41)    2.42                 3
 05/24/2018   13:11:19   ( -68.12, 161.05) 05/24/2018   13:10:05  ( -68.13, 161.09)    2.07                74
 05/27/2018   03:46:47   ( -68.32, -58.05) 05/27/2018   03:47:38  ( -68.30, -58.11)    2.92                51
 05/27/2018   04:37:31   (  68.19, 109.41) 05/27/2018   04:37:05  (  68.19, 109.40)    0.86                26
 05/27/2018   05:27:57   ( -67.25, -82.11) 05/27/2018   05:26:49  ( -67.30, -83.98)   80.67                68
 05/29/2018   19:13:17   (  69.31,-110.93) 05/29/2018   19:14:24  (  69.18,-108.77)   86.48                67
 05/29/2018   20:03:42   ( -68.31,  57.73) 05/29/2018   20:04:08  ( -68.30,  57.76)    1.57                26
 05/29/2018   20:54:25   (  68.13,-134.74) 05/29/2018   20:53:36  (  68.13,-134.80)    2.64                49
 06/01/2018   11:29:56   (  68.45,   6.01) 06/01/2018   11:31:07  (  68.44,   6.18)    6.84                71
 06/01/2018   12:20:36   ( -68.25, 173.58) 06/01/2018   12:20:39  ( -68.23, 173.56)    2.25                 3
 06/01/2018   13:11:19   (  68.08, -18.89) 06/01/2018   13:10:06  (  68.11, -18.94)    4.45                73