Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 12.  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)
 01/13/2018   18:22:39   (  69.03, -97.90) 01/13/2018   18:23:48  (  68.96, -96.42)   59.64                69
 01/13/2018   19:13:09   ( -68.31,  70.39) 01/13/2018   19:13:28  ( -68.28,  70.39)    2.33                19
 01/13/2018   20:03:53   (  68.18,-122.15) 01/13/2018   20:02:55  (  68.18,-122.09)    2.19                58
 01/16/2018   10:39:20   (  68.36,  18.78) 01/16/2018   10:40:28  (  68.35,  18.71)    2.74                68
 01/16/2018   11:30:01   ( -68.22,-173.73) 01/16/2018   11:29:58  ( -68.24,-173.79)    3.19                 3
 01/16/2018   12:20:41   (  67.88,  -5.99) 01/16/2018   12:19:29  (  67.91,  -6.53)   22.75                72
 01/19/2018   02:56:13   (  68.33, 134.59) 01/19/2018   02:56:58  (  68.30, 134.54)    3.48                45
 01/19/2018   03:46:54   ( -68.19, -57.92) 01/19/2018   03:46:28  ( -68.20, -57.96)    1.87                26
 01/21/2018   18:22:39   ( -69.33,  81.70) 01/21/2018   18:23:46  ( -69.21,  83.90)   87.55                67
 01/21/2018   19:13:06   (  68.30,-109.60) 01/21/2018   19:13:27  (  68.32,-109.57)    2.09                21
 01/21/2018   20:03:47   ( -68.16,  57.90) 01/21/2018   20:02:58  ( -68.16,  57.87)    1.05                49
 01/24/2018   10:39:16   ( -68.50,-161.39) 01/24/2018   10:40:28  ( -68.45,-161.18)   10.81                72
 01/24/2018   11:29:58   (  68.28,   6.21) 01/24/2018   11:29:56  (  68.28,   6.26)    2.24                 2
 01/24/2018   12:20:39   ( -68.14, 173.71) 01/24/2018   12:19:27  ( -68.12, 173.71)    1.83                72