Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 8 18.  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)
 08/20/2018   11:30:12   (  68.43,   6.04) 08/20/2018   11:31:11  (  68.43,   6.11)    2.92                59
 08/20/2018   12:20:53   ( -68.29, 173.55) 08/20/2018   12:20:42  ( -68.26, 173.54)    3.11                11
 08/20/2018   13:11:27   (  67.63, -18.32) 08/20/2018   13:10:17  (  67.70, -19.46)   49.03                70
 08/23/2018   03:47:06   (  68.34, 121.94) 08/23/2018   03:47:40  (  68.34, 121.89)    2.21                34
 08/23/2018   04:37:48   ( -68.24, -70.62) 08/23/2018   04:37:10  ( -68.23, -70.61)    0.66                38
 08/25/2018   19:13:26   ( -68.83,  69.74) 08/25/2018   19:14:37  ( -68.70,  70.56)   35.95                71
 08/25/2018   20:04:02   (  68.29,-122.24) 08/25/2018   20:04:09  (  68.31,-122.27)    2.37                 7
 08/25/2018   20:54:44   ( -68.19,  45.21) 08/25/2018   20:53:39  ( -68.20,  45.23)    1.70                65
 08/28/2018   11:30:15   ( -68.41,-173.94) 08/28/2018   11:31:11  ( -68.39,-173.94)    2.73                56
 08/28/2018   12:20:58   (  68.25,  -6.42) 08/28/2018   12:20:38  (  68.27,  -6.44)    2.53                20
 08/28/2018   13:11:28   ( -67.50, 161.83) 08/28/2018   13:10:19  ( -67.55, 160.36)   62.52                69
 08/31/2018   03:47:11   ( -68.37, -58.11) 08/31/2018   03:47:40  ( -68.35, -58.11)    2.41                29
 08/31/2018   04:37:54   (  68.21, 109.40) 08/31/2018   04:37:07  (  68.23, 109.40)    2.24                47