Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 31.  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)
 12/31/2018   18:22:47   (  68.57, -97.32) 12/31/2018   18:23:59  (  68.50, -97.00)   14.80                72
 12/31/2018   19:13:25   ( -68.26,  70.39) 12/31/2018   19:13:31  ( -68.28,  70.36)    2.29                 6
 12/31/2018   20:04:09   (  68.14,-122.15) 12/31/2018   20:02:58  (  68.17,-122.12)    3.39                71
 01/03/2019   10:39:37   (  68.38,  18.70) 01/03/2019   10:40:29  (  68.39,  18.74)    2.50                52
 01/03/2019   11:30:18   ( -68.23,-173.79) 01/03/2019   11:30:00  ( -68.23,-173.83)    1.37                18
 01/03/2019   12:20:48   (  67.36,  -5.41) 01/03/2019   12:19:40  (  67.39,  -7.14)   74.11                68
 01/06/2019   02:56:31   (  68.35, 134.51) 01/06/2019   02:56:59  (  68.34, 134.55)    2.35                28
 01/06/2019   03:47:12   ( -68.20, -57.98) 01/06/2019   03:46:30  ( -68.17, -58.01)    2.90                42
 01/08/2019   18:22:47   ( -68.75,  82.44) 01/08/2019   18:23:58  ( -68.62,  83.13)   31.71                71
 01/08/2019   19:13:24   (  68.27,-109.62) 01/08/2019   19:13:29  (  68.28,-109.63)    1.38                 5
 01/08/2019   20:04:06   ( -68.17,  57.82) 01/08/2019   20:02:59  ( -68.18,  57.87)    2.17                67
 01/11/2019   10:39:34   ( -68.35,-161.26) 01/11/2019   10:40:32  ( -68.34,-161.33)    3.02                58
 01/11/2019   11:30:18   (  68.24,   6.18) 01/11/2019   11:29:59  (  68.22,   6.18)    2.55                19
 01/11/2019   12:20:49   ( -67.55, 174.36) 01/11/2019   12:19:39  ( -67.56, 173.05)   55.87                70
 01/14/2019   02:56:27   ( -68.33, -45.46) 01/14/2019   02:57:00  ( -68.34, -45.45)    1.50                33
 01/14/2019   03:47:10   (  68.17, 122.05) 01/14/2019   03:46:28  (  68.16, 121.99)    2.78                42