Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 12 4.  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)
 12/04/2017   18:22:48   ( -68.48,  82.82) 12/04/2017   18:24:00  ( -68.43,  82.91)    6.16                72
 12/04/2017   19:13:30   (  68.25,-109.58) 12/04/2017   19:13:28  (  68.26,-109.65)    2.94                 2
 12/04/2017   20:04:11   ( -68.11,  57.92) 12/04/2017   20:02:59  ( -68.10,  57.80)    4.99                72
 12/07/2017   10:39:39   ( -68.35,-161.25) 12/07/2017   10:40:28  ( -68.37,-161.27)    2.22                49
 12/07/2017   11:30:23   (  68.24,   6.20) 12/07/2017   11:29:55  (  68.25,   6.23)    2.12                28
 12/07/2017   12:20:48   ( -67.23, 174.75) 12/07/2017   12:19:40  ( -67.32, 172.79)   85.10                68
 12/10/2017   02:06:06   (  69.24, 146.00) 12/10/2017   02:07:14  (  69.13, 147.93)   77.19                68
 12/10/2017   02:56:32   ( -68.29, -45.40) 12/10/2017   02:56:57  ( -68.31, -45.46)    3.36                25
 12/10/2017   03:47:16   (  68.18, 122.05) 12/10/2017   03:46:24  (  68.19, 122.04)    1.13                52
 12/12/2017   18:22:44   (  68.38, -97.06) 12/12/2017   18:23:55  (  68.39, -97.11)    2.27                71
 12/12/2017   19:13:26   ( -68.28,  70.39) 12/12/2017   19:13:25  ( -68.29,  70.40)    1.00                 1
 12/12/2017   20:04:07   (  68.01,-121.96) 12/12/2017   20:02:54  (  68.05,-122.23)   12.15                73
 12/15/2017   10:39:38   (  68.38,  18.72) 12/15/2017   10:40:23  (  68.36,  18.74)    2.16                45
 12/15/2017   11:30:19   ( -68.22,-173.76) 12/15/2017   11:29:54  ( -68.21,-173.81)    2.37                25
 12/15/2017   12:20:44   (  67.09,  -5.08) 12/15/2017   12:19:38  (  67.13,  -7.39)   99.97                66
 12/18/2017   02:06:02   ( -69.28, -34.03) 12/18/2017   02:07:10  ( -69.17, -32.00)   81.26                68
 12/18/2017   02:56:30   (  68.32, 134.56) 12/18/2017   02:56:50  (  68.33, 134.59)    1.48                20