Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 9.  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)
 01/11/2018   02:56:16   ( -68.33, -45.41) 01/11/2018   02:56:58  ( -68.35, -45.42)    2.46                42
 01/11/2018   03:47:00   (  68.20, 122.05) 01/11/2018   03:46:26  (  68.19, 122.03)    1.91                34
 01/13/2018   18:22:40   (  69.08, -97.96) 01/13/2018   18:23:48  (  68.96, -96.41)   62.95                68
 01/13/2018   19:13:09   ( -68.29,  70.40) 01/13/2018   19:13:28  ( -68.29,  70.39)    0.37                19
 01/13/2018   20:03:53   (  68.17,-122.14) 01/13/2018   20:02:55  (  68.18,-122.09)    2.34                58
 01/16/2018   10:39:21   (  68.40,  18.72) 01/16/2018   10:40:27  (  68.39,  18.76)    2.30                66
 01/16/2018   11:30:02   ( -68.26,-173.78) 01/16/2018   11:29:57  ( -68.29,-173.73)    3.31                 5
 01/16/2018   12:20:41   (  67.87,  -5.99) 01/16/2018   12:19:29  (  67.89,  -6.55)   23.70                72
 01/19/2018   02:56:13   (  68.32, 134.60) 01/19/2018   02:56:57  (  68.32, 134.56)    1.53                44
 01/19/2018   03:46:55   ( -68.24, -57.97) 01/19/2018   03:46:27  ( -68.22, -57.93)    2.61                28
 01/21/2018   18:22:37   ( -69.27,  81.79) 01/21/2018   18:23:44  ( -69.19,  83.88)   83.10                67
 01/21/2018   19:13:05   (  68.30,-109.60) 01/21/2018   19:13:25  (  68.30,-109.59)    0.55                20
 01/21/2018   20:03:46   ( -68.16,  57.90) 01/21/2018   20:02:56  ( -68.14,  57.86)    2.65                50