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   18:22:40   (  69.04, -97.91) 01/13/2018   18:23:49  (  68.94, -96.44)   59.86                69
 01/13/2018   19:13:09   ( -68.31,  70.37) 01/13/2018   19:13:27  ( -68.33,  70.44)    2.93                18
 01/13/2018   20:03:53   (  68.19,-122.16) 01/13/2018   20:02:55  (  68.17,-122.11)    3.36                58
 01/16/2018   10:39:20   (  68.37,  18.76) 01/16/2018   10:40:27  (  68.38,  18.75)    1.90                67
 01/16/2018   11:30:02   ( -68.28,-173.81) 01/16/2018   11:29:57  ( -68.27,-173.75)    2.78                 5
 01/16/2018   12:20:40   (  67.84,  -5.94) 01/16/2018   12:19:28  (  67.94,  -6.49)   25.99                72
 01/19/2018   02:56:13   (  68.34, 134.58) 01/19/2018   02:56:57  (  68.33, 134.56)    1.49                44
 01/19/2018   03:46:54   ( -68.20, -57.93) 01/19/2018   03:46:27  ( -68.22, -57.93)    2.33                27
 01/21/2018   18:22:38   ( -69.29,  81.77) 01/21/2018   18:23:45  ( -69.22,  83.91)   84.95                67
 01/21/2018   19:13:06   (  68.31,-109.61) 01/21/2018   19:13:26  (  68.32,-109.56)    2.59                20
 01/21/2018   20:03:47   ( -68.17,  57.88) 01/21/2018   20:02:57  ( -68.17,  57.89)    0.72                50
 01/24/2018   10:39:16   ( -68.46,-161.34) 01/24/2018   10:40:28  ( -68.44,-161.18)    6.65                72
 01/24/2018   11:29:57   (  68.23,   6.26) 01/24/2018   11:29:55  (  68.26,   6.25)    3.36                 2
 01/24/2018   12:20:38   ( -68.09, 173.76) 01/24/2018   12:19:26  ( -68.11, 173.70)    3.15                72