Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 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)
 12/09/2016   18:23:00   (  68.46, -97.17) 12/09/2016   18:24:03  (  68.44, -97.14)    2.34                63
 12/09/2016   19:13:41   ( -68.30,  70.34) 12/09/2016   19:13:34  ( -68.28,  70.31)    2.78                 7
 12/09/2016   20:04:18   (  67.81,-121.73) 12/09/2016   20:03:06  (  67.88,-122.52)   33.69                72
 12/12/2016   10:39:53   (  68.37,  18.71) 12/12/2016   10:40:33  (  68.37,  18.66)    2.23                40
 12/12/2016   11:30:35   ( -68.27,-173.84) 12/12/2016   11:30:03  ( -68.27,-173.83)    0.46                32
 12/15/2016   02:06:15   ( -69.14, -33.86) 12/15/2016   02:07:24  ( -69.02, -32.30)   63.16                69
 12/15/2016   02:56:46   (  68.34, 134.52) 12/15/2016   02:57:01  (  68.34, 134.51)    0.89                15
 12/15/2016   03:47:28   ( -68.23, -58.03) 12/15/2016   03:46:31  ( -68.24, -57.98)    2.46                57
 12/17/2016   18:22:56   ( -68.41,  82.88) 12/17/2016   18:24:03  ( -68.43,  82.85)    2.53                67
 12/17/2016   19:13:40   (  68.31,-109.68) 12/17/2016   19:13:30  (  68.31,-109.65)    1.06                10
 12/17/2016   20:04:17   ( -67.94,  58.12) 12/17/2016   20:03:04  ( -67.99,  57.60)   22.27                73
 12/20/2016   10:39:50   ( -68.39,-161.31) 12/20/2016   10:40:32  ( -68.39,-161.32)    0.35                42
 12/20/2016   11:30:34   (  68.29,   6.12) 12/20/2016   11:29:59  (  68.27,   6.18)    3.06                35