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,-162.75) ( -69.29,-160.25)   98.85                66
 06/19/2013   11:29:38   (  68.28,   6.11) (  68.29,   6.14)    2.34                24
 06/19/2013   12:20:19   ( -68.14, 173.60) ( -68.13, 173.58)    1.59                46
 06/22/2013   02:55:51   ( -68.53, -45.75) ( -68.45, -45.43)   15.29                72
 06/22/2013   03:46:32   (  68.24, 121.93) (  68.23, 121.94)    2.01                 0
 06/22/2013   04:37:13   ( -68.10, -70.57) ( -68.12, -70.55)    2.22                71
 06/24/2013   19:12:41   ( -68.33,  70.29) ( -68.32,  70.29)    0.85                52
 06/24/2013   20:03:25   (  68.21,-122.25) (  68.21,-122.20)    2.22                25
 06/24/2013   20:53:52   ( -67.32,  46.17) ( -67.38,  44.48)   72.70                69
 06/27/2013   10:39:11   (  69.36,  17.36) (  69.23,  19.68)   92.41                66
 06/27/2013   11:29:35   ( -68.30,-173.89) ( -68.30,-173.86)    1.40                27
 06/27/2013   12:20:18   (  68.13,  -6.37) (  68.12,  -6.42)    2.67                48
 06/30/2013   02:55:49   (  68.48, 134.34) (  68.41, 134.53)   10.51                71
 06/30/2013   03:46:29   ( -68.27, -58.07) ( -68.26, -58.02)    2.37                 2
 06/30/2013   04:37:12   (  68.11, 109.44) (  68.08, 109.41)    3.17                73