Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 29.  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, -97.33) 12/31/2018   18:23:59  (  68.50, -97.00)   15.27                72
 12/31/2018   19:13:25   ( -68.26,  70.39) 12/31/2018   19:13:31  ( -68.28,  70.36)    2.22                 6
 12/31/2018   20:04:09   (  68.15,-122.15) 12/31/2018   20:02:58  (  68.17,-122.12)    2.82                71
 01/03/2019   10:39:37   (  68.38,  18.69) 01/03/2019   10:40:29  (  68.39,  18.75)    2.57                52
 01/03/2019   11:30:18   ( -68.23,-173.79) 01/03/2019   11:30:00  ( -68.23,-173.82)    0.99                18
 01/03/2019   12:20:48   (  67.36,  -5.42) 01/03/2019   12:19:40  (  67.39,  -7.14)   73.75                68
 01/06/2019   02:56:31   (  68.35, 134.50) 01/06/2019   02:56:59  (  68.34, 134.56)    2.80                28
 01/06/2019   03:47:12   ( -68.20, -57.98) 01/06/2019   03:46:30  ( -68.18, -57.99)    1.85                42
 01/08/2019   18:22:47   ( -68.75,  82.44) 01/08/2019   18:23:58  ( -68.63,  83.15)   31.92                71
 01/08/2019   19:13:24   (  68.27,-109.63) 01/08/2019   19:13:29  (  68.29,-109.62)    2.03                 5
 01/08/2019   20:04:05   ( -68.12,  57.89) 01/08/2019   20:03:00  ( -68.14,  57.83)    3.21                65
 01/11/2019   10:39:34   ( -68.36,-161.27) 01/11/2019   10:40:32  ( -68.36,-161.30)    1.56                58
 01/11/2019   11:30:18   (  68.25,   6.17) 01/11/2019   11:29:59  (  68.24,   6.20)    1.58                19
 01/11/2019   12:20:49   ( -67.56, 174.36) 01/11/2019   12:19:39  ( -67.59, 173.07)   54.52                70