Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 5 8.  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)
 05/10/2017   19:12:52   (  68.34,-109.59) 05/10/2017   19:13:24  (  68.34,-109.57)    1.38                32
 05/10/2017   20:03:33   ( -68.20,  57.90) 05/10/2017   20:02:55  ( -68.18,  57.87)    2.62                38
 05/13/2017   10:39:11   ( -68.86,-161.83) 05/13/2017   10:40:21  ( -68.77,-160.82)   42.13                70
 05/13/2017   11:29:46   (  68.26,   6.28) 05/13/2017   11:29:55  (  68.27,   6.21)    2.75                 9
 05/13/2017   12:20:28   ( -68.17, 173.70) 05/13/2017   12:19:25  ( -68.16, 173.72)    1.82                63
 05/16/2017   02:55:57   ( -68.36, -45.39) 05/16/2017   02:56:58  ( -68.36, -45.44)    2.06                61
 05/16/2017   03:46:41   (  68.23, 122.08) 05/16/2017   03:46:25  (  68.25, 122.07)    1.70                16
 05/16/2017   04:37:14   ( -67.67, -69.89) 05/16/2017   04:36:03  ( -67.70, -70.94)   44.27                71
 05/18/2017   19:12:52   ( -68.34,  70.41) 05/18/2017   19:13:28  ( -68.35,  70.43)    2.20                36
 05/18/2017   20:03:36   (  68.21,-122.12) 05/18/2017   20:02:56  (  68.18,-122.13)    3.24                40
 05/21/2017   10:39:12   (  68.83,  18.21) 05/21/2017   10:40:22  (  68.73,  19.13)   38.72                70
 05/21/2017   11:29:46   ( -68.31,-173.79) 05/21/2017   11:29:58  ( -68.30,-173.76)    2.09                12
 05/21/2017   12:20:30   (  68.19,  -6.32) 05/21/2017   12:19:25  (  68.18,  -6.26)    2.93                65