Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 30.  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   (  68.58, -97.34) 12/31/2018   18:23:59  (  68.50, -97.00)   16.54                72
 12/31/2018   19:13:25   ( -68.28,  70.38) 12/31/2018   19:13:31  ( -68.28,  70.36)    0.71                 6
 12/31/2018   20:04:09   (  68.16,-122.17) 12/31/2018   20:02:58  (  68.17,-122.12)    2.24                71
 01/03/2019   10:39:37   (  68.34,  18.75) 01/03/2019   10:40:31  (  68.35,  18.69)    2.64                54
 01/03/2019   11:30:19   ( -68.24,-173.81) 01/03/2019   11:30:01  ( -68.25,-173.80)    0.49                18
 01/03/2019   12:20:49   (  67.37,  -5.43) 01/03/2019   12:19:40  (  67.46,  -7.06)   70.27                69
 01/06/2019   02:56:30   (  68.31, 134.55) 01/06/2019   02:57:00  (  68.32, 134.53)    1.16                30
 01/06/2019   03:47:12   ( -68.21, -58.00) 01/06/2019   03:46:30  ( -68.22, -57.96)    1.87                42
 01/08/2019   18:22:47   ( -68.77,  82.41) 01/08/2019   18:23:58  ( -68.69,  83.21)   33.50                71
 01/08/2019   19:13:24   (  68.29,-109.64) 01/08/2019   19:13:30  (  68.29,-109.62)    0.94                 6
 01/08/2019   20:04:05   ( -68.13,  57.87) 01/08/2019   20:03:01  ( -68.14,  57.82)    1.94                64
 01/11/2019   10:39:34   ( -68.37,-161.29) 01/11/2019   10:40:33  ( -68.39,-161.28)    1.92                59
 01/11/2019   11:30:17   (  68.21,   6.22) 01/11/2019   11:30:01  (  68.21,   6.16)    2.65                16
 01/11/2019   12:20:50   ( -67.63, 174.27) 01/11/2019   12:19:39  ( -67.67, 173.16)   47.26                71