Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 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)
 01/19/2018   02:56:13   (  68.34, 134.57) 01/19/2018   02:56:57  (  68.32, 134.55)    2.34                44
 01/19/2018   03:46:54   ( -68.21, -57.94) 01/19/2018   03:46:27  ( -68.21, -57.94)    0.85                27
 01/21/2018   18:22:38   ( -69.29,  81.75) 01/21/2018   18:23:45  ( -69.19,  83.88)   84.57                67
 01/21/2018   19:13:06   (  68.31,-109.62) 01/21/2018   19:13:26  (  68.30,-109.59)    1.68                20
 01/21/2018   20:03:47   ( -68.18,  57.87) 01/21/2018   20:02:56  ( -68.20,  57.92)    2.92                51
 01/24/2018   10:39:16   ( -68.47,-161.35) 01/24/2018   10:40:27  ( -68.45,-161.17)    7.39                71
 01/24/2018   11:29:59   (  68.29,   6.19) 01/24/2018   11:29:55  (  68.27,   6.26)    3.20                 4
 01/24/2018   12:20:38   ( -68.10, 173.75) 01/24/2018   12:19:25  ( -68.12, 173.71)    2.68                73
 01/27/2018   02:56:06   ( -68.34, -45.40) 01/27/2018   02:56:56  ( -68.36, -45.40)    2.75                50
 01/27/2018   03:46:50   (  68.21, 122.07) 01/27/2018   03:46:24  (  68.18, 122.04)    3.28                26
 01/27/2018   04:37:16   ( -67.27, -69.46) 01/27/2018   04:36:08  ( -67.30, -71.34)   80.81                68
 01/29/2018   18:22:34   (  69.31, -98.25) 01/29/2018   18:23:41  (  69.20, -96.10)   85.81                67
 01/29/2018   19:12:59   ( -68.31,  70.41) 01/29/2018   19:13:25  ( -68.32,  70.44)    1.46                26
 01/29/2018   20:03:43   (  68.19,-122.13) 01/29/2018   20:02:52  (  68.20,-122.06)    2.79                51
 02/01/2018   10:39:12   (  68.49,  18.64) 02/01/2018   10:40:22  (  68.48,  18.88)    9.76                70
 02/01/2018   11:29:52   ( -68.29,-173.79) 02/01/2018   11:29:54  ( -68.27,-173.74)    3.18                 2
 02/01/2018   12:20:35   (  68.12,  -6.26) 02/01/2018   12:19:22  (  68.09,  -6.31)    3.43                73