Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 3.  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)
 01/05/2018   18:22:42   ( -68.97,  82.18) 01/05/2018   18:23:52  ( -68.86,  83.45)   52.35                70
 01/05/2018   19:13:16   (  68.32,-109.64) 01/05/2018   19:13:27  (  68.31,-109.58)    2.76                11
 01/05/2018   20:03:57   ( -68.17,  57.86) 01/05/2018   20:02:58  ( -68.14,  57.86)    3.46                59
 01/08/2018   10:39:24   ( -68.40,-161.28) 01/08/2018   10:40:29  ( -68.40,-161.24)    1.62                65
 01/08/2018   11:30:07   (  68.23,   6.25) 01/08/2018   11:29:57  (  68.23,   6.20)    1.85                10
 01/08/2018   12:20:43   ( -67.81, 174.08) 01/08/2018   12:19:31  ( -67.90, 173.45)   28.21                72
 01/11/2018   02:56:16   ( -68.31, -45.39) 01/11/2018   02:57:00  ( -68.33, -45.45)    3.25                44
 01/11/2018   03:47:00   (  68.19, 122.07) 01/11/2018   03:46:27  (  68.21, 122.06)    2.47                33
 01/13/2018   18:22:41   (  69.11, -98.01) 01/13/2018   18:23:49  (  69.03, -96.33)   67.64                68
 01/13/2018   19:13:10   ( -68.32,  70.36) 01/13/2018   19:13:30  ( -68.32,  70.42)    2.52                20
 01/13/2018   20:03:53   (  68.16,-122.12) 01/13/2018   20:02:58  (  68.15,-122.14)    1.62                55
 01/16/2018   10:39:21   (  68.39,  18.74) 01/16/2018   10:40:31  (  68.36,  18.71)    3.35                70
 01/16/2018   11:30:02   ( -68.24,-173.75) 01/16/2018   11:30:01  ( -68.26,-173.78)    2.26                 1
 01/16/2018   12:20:43   (  67.96,  -6.10) 01/16/2018   12:19:30  (  68.03,  -6.40)   14.63                73