Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 9 8.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2013   02:06:17   (  68.92, 146.37) (  68.85, 147.39)   41.95                70
 09/10/2013   02:56:50   ( -68.38, -45.59) ( -68.36, -45.58)    2.20                14
 09/10/2013   03:47:34   (  68.23, 121.91) (  68.24, 121.93)    1.88                63
 09/12/2013   18:23:05   (  68.44, -97.23) (  68.47, -97.20)    2.66                56
 09/12/2013   19:13:46   ( -68.32,  70.25) ( -68.31,  70.24)    1.79                14
 09/12/2013   20:04:19   (  67.58,-121.52) (  67.63,-122.91)   59.06                70
 09/15/2013   10:40:02   (  68.40,  18.60) (  68.40,  18.60)    0.24                28
 09/15/2013   11:30:43   ( -68.27,-173.92) ( -68.30,-173.89)    3.25                43
 09/18/2013   02:06:18   ( -68.65, -33.28) ( -68.61, -32.91)   15.76                71
 09/18/2013   02:56:59   (  68.35, 134.43) (  68.37, 134.45)    2.51                 1
 09/18/2013   03:47:40   ( -68.23, -58.09) ( -68.22, -58.10)    0.50                71
 09/20/2013   18:23:12   ( -68.45,  82.76) ( -68.46,  82.80)    2.12                47
 09/20/2013   19:13:56   (  68.31,-109.75) (  68.34,-109.71)    3.00                30
 09/20/2013   20:04:20   ( -67.27,  58.86) ( -67.29,  56.72)   91.57                67