Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 6 18.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 06/19/2013   10:39:13   ( -69.41,-162.74) ( -69.30,-160.24)   98.62                66
 06/19/2013   11:29:38   (  68.27,   6.12) (  68.24,   6.08)    3.21                25
 06/19/2013   12:20:19   ( -68.13, 173.61) ( -68.13, 173.59)    0.82                46
 06/22/2013   02:55:51   ( -68.52, -45.74) ( -68.46, -45.43)   14.54                72
 06/22/2013   03:46:32   (  68.24, 121.94) (  68.23, 121.95)    0.79                 0
 06/22/2013   04:37:13   ( -68.10, -70.57) ( -68.13, -70.54)    3.32                71
 06/24/2013   19:12:41   ( -68.33,  70.30) ( -68.33,  70.30)    0.11                52
 06/24/2013   20:03:25   (  68.21,-122.24) (  68.21,-122.20)    1.77                25
 06/24/2013   20:53:52   ( -67.31,  46.18) ( -67.38,  44.48)   73.04                69
 06/27/2013   10:39:11   (  69.35,  17.36) (  69.23,  19.68)   91.91                66
 06/27/2013   11:29:35   ( -68.29,-173.88) ( -68.30,-173.86)    1.04                27
 06/27/2013   12:20:18   (  68.13,  -6.36) (  68.12,  -6.42)    2.86                48
 06/30/2013   02:55:49   (  68.47, 134.35) (  68.46, 134.59)    9.89                70
 06/30/2013   03:46:29   ( -68.26, -58.06) ( -68.26, -58.02)    1.78                 2
 06/30/2013   04:37:11   (  68.05, 109.52) (  68.07, 109.41)    5.70                72