Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 12 16.  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)
 12/17/2016   18:22:57   ( -68.44,  82.84) 12/17/2016   18:24:04  ( -68.43,  82.85)    1.82                67
 12/17/2016   19:13:41   (  68.33,-109.71) 12/17/2016   19:13:31  (  68.32,-109.64)    3.18                10
 12/17/2016   20:04:17   ( -67.91,  58.14) 12/17/2016   20:03:05  ( -67.99,  57.60)   23.93                72
 12/20/2016   10:39:50   ( -68.41,-161.35) 12/20/2016   10:40:32  ( -68.41,-161.29)    2.36                42
 12/20/2016   11:30:33   (  68.25,   6.17) 12/20/2016   11:30:00  (  68.24,   6.15)    1.13                33
 12/23/2016   02:06:13   (  69.08, 146.22) 12/23/2016   02:07:22  (  69.00, 147.68)   59.04                69
 12/23/2016   02:56:43   ( -68.33, -45.47) 12/23/2016   02:57:02  ( -68.33, -45.51)    1.34                19
 12/23/2016   03:47:27   (  68.22, 121.97) 12/23/2016   03:46:29  (  68.22, 122.00)    1.34                58
 12/25/2016   18:22:55   (  68.41, -97.12) 12/25/2016   18:24:01  (  68.41, -97.16)    1.85                66
 12/25/2016   19:13:37   ( -68.31,  70.33) 12/25/2016   19:13:31  ( -68.31,  70.34)    0.58                 6
 12/25/2016   20:04:15   (  67.88,-121.82) 12/25/2016   20:03:03  (  67.91,-122.48)   27.83                72
 12/28/2016   10:39:49   (  68.39,  18.68) 12/28/2016   10:40:30  (  68.38,  18.68)    0.46                41
 12/28/2016   11:30:31   ( -68.28,-173.87) 12/28/2016   11:30:00  ( -68.28,-173.81)    2.55                31