Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2019 1 21.  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)
 01/22/2019   02:56:26   (  68.33, 134.53) 01/22/2019   02:56:56  (  68.34, 134.58)    2.35                30
 01/22/2019   03:47:07   ( -68.19, -57.97) 01/22/2019   03:46:27  ( -68.17, -57.99)    2.29                40
 01/24/2019   18:22:43   ( -68.81,  82.36) 01/24/2019   18:23:54  ( -68.65,  83.19)   37.78                71
 01/24/2019   19:13:19   (  68.26,-109.61) 01/24/2019   19:13:26  (  68.26,-109.64)    1.18                 7
 01/24/2019   20:04:01   ( -68.18,  57.82) 01/24/2019   20:02:56  ( -68.15,  57.86)    3.07                65
 01/27/2019   10:39:28   ( -68.37,-161.28) 01/27/2019   10:40:27  ( -68.35,-161.29)    1.61                59
 01/27/2019   11:30:12   (  68.25,   6.18) 01/27/2019   11:29:54  (  68.24,   6.22)    1.78                18
 01/27/2019   12:20:43   ( -67.57, 174.35) 01/27/2019   12:19:33  ( -67.63, 173.14)   51.46                70
 01/30/2019   02:56:22   ( -68.35, -45.49) 01/30/2019   02:56:56  ( -68.34, -45.43)    2.88                34
 01/30/2019   03:47:05   (  68.18, 122.04) 01/30/2019   03:46:24  (  68.17, 122.01)    2.29                41
 02/01/2019   18:22:40   (  68.76, -97.56) 02/01/2019   18:23:51  (  68.65, -96.80)   32.97                71
 02/01/2019   19:13:15   ( -68.29,  70.37) 02/01/2019   19:13:26  ( -68.27,  70.37)    1.76                11
 02/01/2019   20:03:59   (  68.17,-122.17) 02/01/2019   20:02:53  (  68.15,-122.13)    3.14                66
 02/04/2019   10:39:27   (  68.37,  18.72) 02/04/2019   10:40:25  (  68.36,  18.72)    1.63                58
 02/04/2019   11:30:08   ( -68.22,-173.77) 02/04/2019   11:29:56  ( -68.21,-173.83)    2.80                12
 02/04/2019   12:20:42   (  67.57,  -5.65) 02/04/2019   12:19:32  (  67.58,  -6.91)   53.28                70