Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2015 9 8.  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)
 09/10/2015   16:44:20   ( -68.92, 107.77) 09/10/2015   16:45:32  ( -68.88, 108.06)   12.39                72
 09/10/2015   17:35:02   (  68.68, -84.60) 09/10/2015   17:35:01  (  68.66, -84.57)    2.78                 1
 09/10/2015   18:25:43   ( -68.56,  82.88) 09/10/2015   18:24:31  ( -68.55,  82.93)    1.91                72
 09/13/2015   09:01:09   ( -68.77,-136.24) 09/13/2015   09:02:00  ( -68.76,-136.20)    1.86                51
 09/13/2015   09:51:53   (  68.64,  31.24) 09/13/2015   09:51:27  (  68.64,  31.30)    2.45                26
 09/13/2015   10:42:19   ( -67.70,-160.26) 09/13/2015   10:41:11  ( -67.75,-162.12)   78.80                68
 09/16/2015   00:27:35   (  69.70, 170.90) 09/16/2015   00:28:42  (  69.61, 173.17)   88.25                67
 09/16/2015   01:18:00   ( -68.72, -20.40) 09/16/2015   01:18:26  ( -68.73, -20.34)    2.71                26
 09/16/2015   02:08:43   (  68.54, 147.14) 09/16/2015   02:07:54  (  68.56, 147.09)    3.13                49
 09/18/2015   16:44:10   (  68.86, -72.14) 09/18/2015   16:45:20  (  68.86, -71.93)    8.39                70
 09/18/2015   17:34:49   ( -68.62,  95.50) 09/18/2015   17:34:52  ( -68.64,  95.44)    3.26                 3
 09/18/2015   18:25:32   (  68.44, -96.95) 09/18/2015   18:24:20  (  68.46, -97.13)    7.67                72
 09/21/2015   09:00:59   (  68.72,  43.84) 09/21/2015   09:01:48  (  68.70,  43.77)    3.35                49
 09/21/2015   09:51:40   ( -68.58,-148.67) 09/21/2015   09:51:18  ( -68.60,-148.72)    2.80                22
 09/21/2015   10:42:07   (  67.54,  19.95) 09/21/2015   10:41:00  (  67.63,  17.79)   92.30                67