Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 12 7.  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)
 12/07/2017   10:39:40   ( -68.38,-161.28) 12/07/2017   10:40:28  ( -68.40,-161.25)    2.61                48
 12/07/2017   11:30:23   (  68.21,   6.24) 12/07/2017   11:29:56  (  68.23,   6.20)    3.10                27
 12/07/2017   12:20:49   ( -67.25, 174.73) 12/07/2017   12:19:41  ( -67.28, 172.75)   85.35                68
 12/10/2017   02:06:07   (  69.25, 145.99) 12/10/2017   02:07:14  (  69.15, 147.95)   78.41                67
 12/10/2017   02:56:33   ( -68.30, -45.41) 12/10/2017   02:56:57  ( -68.32, -45.46)    2.88                24
 12/10/2017   03:47:17   (  68.19, 122.04) 12/10/2017   03:46:24  (  68.21, 122.06)    2.11                53
 12/12/2017   18:22:44   (  68.37, -97.05) 12/12/2017   18:23:54  (  68.39, -97.12)    3.31                70
 12/12/2017   19:13:26   ( -68.27,  70.40) 12/12/2017   19:13:24  ( -68.28,  70.39)    1.26                 2
 12/12/2017   20:04:06   (  67.95,-121.88) 12/12/2017   20:02:54  (  68.00,-122.30)   18.32                72
 12/15/2017   10:39:38   (  68.34,  18.76) 12/15/2017   10:40:22  (  68.33,  18.70)    2.61                44
 12/15/2017   11:30:20   ( -68.23,-173.79) 12/15/2017   11:29:52  ( -68.22,-173.79)    1.08                28
 12/18/2017   02:06:02   ( -69.15, -33.86) 12/18/2017   02:07:11  ( -69.04, -32.17)   68.22                69
 12/18/2017   02:56:32   (  68.30, 134.58) 12/18/2017   02:56:49  (  68.31, 134.57)    1.47                17
 12/18/2017   03:47:14   ( -68.19, -57.96) 12/18/2017   03:46:19  ( -68.21, -57.92)    2.55                55
 12/20/2017   18:22:43   ( -68.41,  82.90) 12/20/2017   18:23:49  ( -68.40,  82.92)    1.30                66
 12/20/2017   19:13:26   (  68.25,-109.59) 12/20/2017   19:13:16  (  68.28,-109.57)    2.81                10
 12/20/2017   20:04:03   ( -67.87,  58.20) 12/20/2017   20:02:50  ( -67.95,  57.67)   23.72                73