Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 19.  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)
 09/21/2018   11:30:28   (  68.37,   6.09) 09/21/2018   11:31:00  (  68.36,   6.04)    2.21                32
 09/21/2018   12:21:09   ( -68.23, 173.59) 09/21/2018   12:20:30  ( -68.25, 173.55)    3.07                39
 09/24/2018   02:56:46   ( -68.79, -46.00) 09/24/2018   02:57:57  ( -68.67, -45.34)   29.95                71
 09/24/2018   03:47:24   (  68.35, 121.89) 09/24/2018   03:47:28  (  68.33, 121.89)    2.14                 4
 09/24/2018   04:38:05   ( -68.21, -70.61) 09/24/2018   04:36:58  ( -68.23, -70.60)    2.12                67
 09/26/2018   19:13:34   ( -68.40,  70.29) 09/26/2018   19:14:28  ( -68.41,  70.23)    3.06                54
 09/26/2018   20:04:18   (  68.28,-122.25) 09/26/2018   20:03:55  (  68.29,-122.27)    1.94                23
 09/26/2018   20:54:46   ( -67.43,  46.12) 09/26/2018   20:53:37  ( -67.52,  44.47)   70.89                69
 09/29/2018   10:40:05   (  69.38,  17.40) 09/29/2018   10:41:12  (  69.25,  19.53)   85.13                67
 09/29/2018   11:30:30   ( -68.38,-173.92) 09/29/2018   11:30:56  ( -68.37,-173.94)    1.47                26
 09/29/2018   12:21:14   (  68.26,  -6.46) 09/29/2018   12:20:23  (  68.25,  -6.44)    1.72                51
 10/02/2018   02:56:44   (  68.46, 134.43) 10/02/2018   02:57:53  (  68.47, 134.44)    1.46                69
 10/02/2018   03:47:25   ( -68.31, -58.06) 10/02/2018   03:47:24  ( -68.32, -58.12)    2.52                 1
 10/02/2018   04:38:06   (  68.03, 109.60) 10/02/2018   04:36:53  (  68.08, 109.25)   15.68                73