Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 5 11.  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   ( -68.31, -58.04) 05/11/2018   03:47:30  ( -68.28, -58.09)    3.04                43
 05/11/2018   04:37:31   (  68.18, 109.42) 05/11/2018   04:36:57  (  68.18, 109.43)    0.60                34
 05/13/2018   19:13:12   (  69.07,-110.61) 05/13/2018   19:14:20  (  68.95,-109.03)   64.29                68
 05/13/2018   20:03:41   ( -68.28,  57.76) 05/13/2018   20:04:00  ( -68.29,  57.78)    1.22                19
 05/13/2018   20:54:24   (  68.11,-134.71) 05/13/2018   20:53:28  (  68.12,-134.77)    2.89                56
 05/16/2018   11:29:54   (  68.35,   6.12) 05/16/2018   11:31:02  (  68.34,   6.08)    2.55                68
 05/16/2018   12:20:35   ( -68.21, 173.63) 05/16/2018   12:20:32  ( -68.23, 173.59)    3.24                 3
 05/16/2018   13:11:15   (  67.87, -18.64) 05/16/2018   13:10:03  (  67.89, -19.16)   21.92                72
 05/19/2018   03:46:49   (  68.33, 121.92) 05/19/2018   03:47:33  (  68.33, 121.94)    1.04                44
 05/19/2018   04:37:30   ( -68.19, -70.58) 05/19/2018   04:37:04  ( -68.17, -70.62)    2.54                26
 05/21/2018   19:13:16   ( -69.28,  69.10) 05/21/2018   19:14:23  ( -69.21,  71.26)   85.84                67
 05/21/2018   20:03:43   (  68.26,-122.22) 05/21/2018   20:04:05  (  68.26,-122.27)    2.37                22
 05/21/2018   20:54:25   ( -68.17,  45.22) 05/21/2018   20:53:35  ( -68.16,  45.24)    1.33                50
 05/24/2018   11:29:55   ( -68.47,-174.02) 05/24/2018   11:31:07  ( -68.41,-173.86)    8.82                72
 05/24/2018   12:20:37   (  68.25,  -6.43) 05/24/2018   12:20:35  (  68.24,  -6.42)    0.81                 2
 05/24/2018   13:11:18   ( -68.10, 161.08) 05/24/2018   13:10:06  ( -68.09, 161.03)    2.40                72