Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 5 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)
 05/19/2018   03:46:49   (  68.33, 121.93) 05/19/2018   03:47:33  (  68.32, 121.94)    0.95                44
 05/19/2018   04:37:30   ( -68.19, -70.58) 05/19/2018   04:37:03  ( -68.21, -70.57)    2.12                27
 05/21/2018   19:13:16   ( -69.29,  69.09) 05/21/2018   19:14:23  ( -69.18,  71.23)   85.40                67
 05/21/2018   20:03:44   (  68.31,-122.28) 05/21/2018   20:04:04  (  68.29,-122.22)    3.29                20
 05/21/2018   20:54:25   ( -68.17,  45.21) 05/21/2018   20:53:34  ( -68.18,  45.28)    2.99                51
 05/24/2018   11:29:55   ( -68.47,-174.03) 05/24/2018   11:31:06  ( -68.42,-173.84)    9.72                71
 05/24/2018   12:20:37   (  68.25,  -6.43) 05/24/2018   12:20:34  (  68.26,  -6.39)    1.65                 3
 05/24/2018   13:11:18   ( -68.10, 161.07) 05/24/2018   13:10:05  ( -68.09, 161.05)    1.51                73
 05/27/2018   03:46:47   ( -68.30, -58.03) 05/27/2018   03:47:38  ( -68.32, -58.08)    3.05                51
 05/27/2018   04:37:31   (  68.18, 109.43) 05/27/2018   04:37:05  (  68.21, 109.42)    2.79                26
 05/27/2018   05:27:57   ( -67.23, -82.09) 05/27/2018   05:26:49  ( -67.32, -83.95)   80.74                68
 05/29/2018   19:13:17   (  69.30,-110.92) 05/29/2018   19:14:24  (  69.20,-108.74)   86.56                67
 05/29/2018   20:03:42   ( -68.30,  57.75) 05/29/2018   20:04:09  ( -68.27,  57.73)    2.96                27
 05/29/2018   20:54:26   (  68.18,-134.79) 05/29/2018   20:53:36  (  68.15,-134.77)    3.00                50