Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 7 22.  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)
 07/22/2018   05:28:02   (  67.66,  97.47) 07/22/2018   05:26:51  (  67.72,  96.44)   43.99                71
 07/24/2018   20:03:42   (  68.35,-122.26) 07/24/2018   20:04:15  (  68.37,-122.20)    3.41                33
 07/24/2018   20:54:23   ( -68.21,  45.24) 07/24/2018   20:53:46  ( -68.21,  45.24)    0.31                37
 07/27/2018   11:30:02   ( -68.84,-174.45) 07/27/2018   11:31:13  ( -68.68,-173.59)   38.71                71
 07/27/2018   12:20:37   (  68.28,  -6.41) 07/27/2018   12:20:44  (  68.29,  -6.42)    0.69                 7
 07/27/2018   13:11:19   ( -68.20, 161.02) 07/27/2018   13:10:14  ( -68.18, 161.09)    3.21                65
 07/30/2018   03:46:50   ( -68.40, -58.10) 07/30/2018   03:47:46  ( -68.37, -58.09)    3.19                56
 07/30/2018   04:37:33   (  68.22, 109.44) 07/30/2018   04:37:13  (  68.25, 109.41)    3.29                20
 07/30/2018   05:28:03   ( -67.49, -82.33) 07/30/2018   05:26:54  ( -67.53, -83.78)   61.75                69
 08/01/2018   19:13:23   (  69.45,-111.08) 08/01/2018   19:14:29  (  69.32,-108.64)   96.52                66
 08/01/2018   20:03:46   ( -68.33,  57.75) 08/01/2018   20:04:15  ( -68.33,  57.74)    0.79                29
 08/01/2018   20:54:30   (  68.22,-134.79) 08/01/2018   20:53:42  (  68.21,-134.76)    1.81                48
 08/04/2018   11:30:02   (  68.48,   6.01) 08/04/2018   11:31:13  (  68.43,   6.12)    6.84                71
 08/04/2018   12:20:42   ( -68.27, 173.60) 08/04/2018   12:20:44  ( -68.28, 173.56)    1.44                 2
 08/04/2018   13:11:25   (  68.10, -18.88) 08/04/2018   13:10:12  (  68.10, -19.00)    4.84                73