Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 5 9.  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)
 05/11/2018   03:46:47   ( -68.32, -58.07) 05/11/2018   03:47:29  ( -68.33, -58.04)    1.05                42
 05/11/2018   04:37:30   (  68.15, 109.46) 05/11/2018   04:36:57  (  68.16, 109.41)    2.66                33
 05/13/2018   19:13:12   (  69.04,-110.56) 05/13/2018   19:14:21  (  68.94,-109.04)   61.50                69
 05/13/2018   20:03:42   ( -68.30,  57.73) 05/13/2018   20:04:01  ( -68.28,  57.77)    2.59                19
 05/13/2018   20:54:25   (  68.13,-134.74) 05/13/2018   20:53:29  (  68.11,-134.78)    2.37                56
 05/16/2018   11:29:55   (  68.37,   6.10) 05/16/2018   11:31:02  (  68.39,   6.15)    3.11                67
 05/16/2018   12:20:36   ( -68.22, 173.60) 05/16/2018   12:20:33  ( -68.24, 173.59)    1.41                 3
 05/16/2018   13:11:16   (  67.89, -18.67) 05/16/2018   13:10:03  (  67.95, -19.10)   19.11                73
 05/19/2018   03:46:49   (  68.36, 121.89) 05/19/2018   03:47:33  (  68.35, 121.96)    3.01                44
 05/19/2018   04:37:30   ( -68.21, -70.60) 05/19/2018   04:37:04  ( -68.19, -70.59)    1.66                26
 05/19/2018   05:27:55   (  67.06,  98.10) 05/19/2018   05:26:48  (  67.12,  95.84)   98.08                67
 05/21/2018   19:13:17   ( -69.36,  68.99) 05/21/2018   19:14:23  ( -69.25,  71.32)   92.22                66
 05/21/2018   20:03:43   (  68.29,-122.25) 05/21/2018   20:04:05  (  68.30,-122.23)    1.42                22
 05/21/2018   20:54:24   ( -68.14,  45.26) 05/21/2018   20:53:36  ( -68.15,  45.22)    1.88                48