Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 6.  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)
 12/07/2018   18:22:47   ( -68.44,  82.87) 12/07/2018   18:23:58  ( -68.44,  82.93)    2.64                71
 12/07/2018   19:13:31   (  68.31,-109.66) 12/07/2018   19:13:26  (  68.29,-109.60)    3.35                 5
 12/07/2018   20:04:10   ( -68.07,  57.97) 12/07/2018   20:02:57  ( -68.11,  57.82)    7.84                73
 12/10/2018   10:39:41   ( -68.39,-161.29) 12/10/2018   10:40:29  ( -68.39,-161.26)    1.36                48
 12/10/2018   11:30:24   (  68.21,   6.24) 12/10/2018   11:29:57  (  68.23,   6.21)    3.05                27
 12/10/2018   12:20:49   ( -67.21, 174.78) 12/10/2018   12:19:42  ( -67.28, 172.74)   88.20                67
 12/13/2018   02:06:10   (  69.39, 145.80) 12/13/2018   02:07:16  (  69.28, 148.11)   91.42                66
 12/13/2018   02:56:34   ( -68.33, -45.46) 12/13/2018   02:57:01  ( -68.33, -45.46)    0.72                27
 12/13/2018   03:47:17   (  68.16, 122.07) 12/13/2018   03:46:29  (  68.18, 122.00)    3.16                48
 12/15/2018   18:22:51   (  68.65, -97.42) 12/15/2018   18:24:03  (  68.55, -96.96)   21.45                72
 12/15/2018   19:13:28   ( -68.28,  70.38) 12/15/2018   19:13:36  ( -68.27,  70.33)    2.28                 8
 12/15/2018   20:04:12   (  68.17,-122.17) 12/15/2018   20:03:03  (  68.17,-122.14)    1.41                69
 12/18/2018   10:39:41   (  68.39,  18.69) 12/18/2018   10:40:42  (  68.38,  18.69)    1.08                61
 12/18/2018   11:30:23   ( -68.29,-173.86) 12/18/2018   11:30:12  ( -68.27,-173.81)    2.93                11
 12/18/2018   12:20:58   (  67.69,  -5.81) 12/18/2018   12:19:47  (  67.72,  -6.81)   42.27                71