Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 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)
 12/10/2018   10:39:41   ( -68.39,-161.29) 12/10/2018   10:40:33  ( -68.39,-161.27)    1.33                52
 12/10/2018   11:30:25   (  68.26,   6.17) 12/10/2018   11:30:01  (  68.24,   6.20)    2.33                24
 12/10/2018   12:20:52   ( -67.37, 174.59) 12/10/2018   12:19:43  ( -67.46, 172.93)   71.89                69
 12/13/2018   02:56:34   ( -68.33, -45.46) 12/13/2018   02:57:10  ( -68.35, -45.47)    1.80                36
 12/13/2018   03:47:18   (  68.22, 122.00) 12/13/2018   03:46:38  (  68.20, 121.99)    2.08                40
 12/15/2018   18:23:02   (  69.24, -98.22) 12/15/2018   18:24:09  (  69.13, -96.30)   76.70                67
 12/15/2018   19:13:29   ( -68.34,  70.31) 12/15/2018   19:13:51  ( -68.36,  70.37)    3.54                22
 12/15/2018   20:04:13   (  68.22,-122.24) 12/15/2018   20:03:19  (  68.21,-122.17)    3.36                54
 12/18/2018   10:39:50   (  68.87,  18.05) 12/18/2018   10:41:00  (  68.80,  19.09)   42.44                70
 12/18/2018   11:30:23   ( -68.29,-173.86) 12/18/2018   11:30:37  ( -68.31,-173.87)    2.75                14
 12/18/2018   12:21:07   (  68.18,  -6.41) 12/18/2018   12:20:05  (  68.16,  -6.41)    2.36                62
 12/21/2018   02:56:41   (  68.67, 134.09) 12/21/2018   02:57:53  (  68.58, 134.61)   23.39                72
 12/21/2018   03:47:18   ( -68.30, -58.10) 12/21/2018   03:47:26  ( -68.32, -58.06)    3.31                 8
 12/21/2018   04:38:01   (  68.14, 109.41) 12/21/2018   04:36:54  (  68.17, 109.39)    3.23                67