Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 5.  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)
 09/07/2017   18:23:00   (  69.31, -98.28) 09/07/2017   18:24:07  (  69.20, -96.26)   80.52                67
 09/07/2017   19:13:26   ( -68.37,  70.32) 09/07/2017   19:13:50  ( -68.37,  70.33)    0.69                24
 09/07/2017   20:04:10   (  68.25,-122.21) 09/07/2017   20:03:17  (  68.25,-122.16)    2.38                53
 09/10/2017   10:39:41   (  68.45,  18.66) 09/10/2017   10:40:50  (  68.43,  18.65)    2.75                69
 09/10/2017   11:30:22   ( -68.31,-173.84) 09/10/2017   11:30:20  ( -68.33,-173.84)    1.59                 2
 09/10/2017   12:21:01   (  67.97,  -6.10) 09/10/2017   12:19:49  (  68.04,  -6.53)   19.59                72
 09/13/2017   02:56:36   (  68.40, 134.50) 09/13/2017   02:57:19  (  68.39, 134.48)    1.38                43
 09/13/2017   03:47:18   ( -68.31, -58.07) 09/13/2017   03:46:49  ( -68.29, -58.01)    3.32                29
 09/15/2017   18:23:02   ( -69.21,  81.86) 09/15/2017   18:24:10  ( -69.13,  83.64)   71.05                68
 09/15/2017   19:13:32   (  68.35,-109.67) 09/15/2017   19:13:49  (  68.35,-109.69)    1.09                17
 09/15/2017   20:04:14   ( -68.25,  57.77) 09/15/2017   20:03:19  ( -68.25,  57.82)    2.21                55
 09/18/2017   10:39:44   ( -68.41,-161.30) 09/18/2017   10:40:52  ( -68.43,-161.36)    3.36                68
 09/18/2017   11:30:28   (  68.29,   6.16) 09/18/2017   11:30:19  (  68.31,   6.14)    2.10                 9
 09/18/2017   12:21:05   ( -67.93, 173.94) 09/18/2017   12:19:53  ( -67.99, 173.39)   23.77                72