Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 12 14.  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)
 12/15/2017   10:39:37   (  68.35,  18.75) 12/15/2017   10:40:23  (  68.35,  18.71)    1.74                46
 12/15/2017   11:30:19   ( -68.26,-173.81) 12/15/2017   11:29:53  ( -68.24,-173.79)    2.08                26
 12/15/2017   12:20:44   (  67.11,  -5.11) 12/15/2017   12:19:37  (  67.17,  -7.36)   97.37                67
 12/18/2017   02:06:03   ( -69.31, -34.09) 12/18/2017   02:07:10  ( -69.21, -31.96)   84.40                67
 12/18/2017   02:56:31   (  68.35, 134.53) 12/18/2017   02:56:51  (  68.32, 134.57)    3.12                20
 12/18/2017   03:47:12   ( -68.20, -57.97) 12/18/2017   03:46:21  ( -68.22, -57.93)    2.63                51
 12/20/2017   18:22:40   ( -68.40,  82.92) 12/20/2017   18:23:52  ( -68.41,  82.92)    0.63                72
 12/20/2017   19:13:24   (  68.29,-109.63) 12/20/2017   19:13:19  (  68.29,-109.58)    2.25                 5
 12/20/2017   20:04:04   ( -68.09,  57.95) 12/20/2017   20:02:50  ( -68.13,  57.86)    5.98                74
 12/23/2017   10:39:32   ( -68.35,-161.24) 12/23/2017   10:40:19  ( -68.38,-161.23)    3.02                47
 12/23/2017   11:30:15   (  68.19,   6.27) 12/23/2017   11:29:47  (  68.21,   6.20)    3.40                28
 12/23/2017   12:20:40   ( -67.17, 174.83) 12/23/2017   12:19:33  ( -67.21, 172.70)   91.88                67
 12/26/2017   02:05:58   (  69.21, 146.06) 12/26/2017   02:07:06  (  69.06, 147.87)   73.43                68
 12/26/2017   02:56:25   ( -68.30, -45.40) 12/26/2017   02:56:48  ( -68.29, -45.46)    2.66                23
 12/26/2017   03:47:09   (  68.20, 122.04) 12/26/2017   03:46:15  (  68.17, 122.05)    2.90                54
 12/28/2017   18:22:37   (  68.41, -97.09) 12/28/2017   18:23:45  (  68.41, -97.06)    1.44                68