Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 4 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)
 04/24/2017   19:12:50   (  68.35,-109.61) 04/24/2017   19:13:22  (  68.32,-109.58)    3.05                32
 04/24/2017   20:03:31   ( -68.20,  57.90) 04/24/2017   20:02:52  ( -68.22,  57.92)    1.54                39
 04/27/2017   10:39:09   ( -68.85,-161.81) 04/27/2017   10:40:19  ( -68.76,-160.81)   41.42                70
 04/27/2017   11:29:44   (  68.26,   6.28) 04/27/2017   11:29:53  (  68.26,   6.22)    2.64                 9
 04/27/2017   12:20:26   ( -68.16, 173.72) 04/27/2017   12:19:23  ( -68.16, 173.73)    0.69                63
 04/30/2017   02:55:56   ( -68.39, -45.42) 04/30/2017   02:56:56  ( -68.37, -45.42)    2.18                60
 04/30/2017   03:46:40   (  68.27, 122.03) 04/30/2017   03:46:23  (  68.26, 122.09)    3.12                17
 04/30/2017   04:37:12   ( -67.64, -69.86) 04/30/2017   04:36:01  ( -67.70, -70.92)   45.40                71
 05/02/2017   19:12:50   ( -68.35,  70.39) 05/02/2017   19:13:25  ( -68.36,  70.44)    2.23                35
 05/02/2017   20:03:33   (  68.19,-122.09) 05/02/2017   20:02:53  (  68.19,-122.11)    1.24                40
 05/05/2017   10:39:10   (  68.79,  18.26) 05/05/2017   10:40:21  (  68.67,  19.07)   35.30                71
 05/05/2017   11:29:44   ( -68.27,-173.73) 05/05/2017   11:29:56  ( -68.29,-173.76)    3.07                12
 05/05/2017   12:20:28   (  68.15,  -6.27) 05/05/2017   12:19:23  (  68.17,  -6.26)    2.24                65