Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 9 17.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2013   02:06:18   ( -68.65, -33.28) ( -68.60, -32.93)   15.49                72
 09/18/2013   02:56:59   (  68.34, 134.44) (  68.37, 134.45)    3.43                 0
 09/18/2013   03:47:40   ( -68.23, -58.09) ( -68.21, -58.12)    2.33                70
 09/20/2013   18:23:11   ( -68.45,  82.76) ( -68.47,  82.80)    2.67                48
 09/20/2013   19:13:55   (  68.31,-109.75) (  68.30,-109.76)    0.85                28
 09/20/2013   20:04:20   ( -67.33,  58.79) ( -67.36,  56.79)   85.71                68
 09/23/2013   09:49:39   (  69.18,  30.22) (  69.05,  31.78)   63.59                69
 09/23/2013   10:40:08   ( -68.42,-161.43) ( -68.39,-161.41)    2.61                20
 09/23/2013   11:30:52   (  68.27,   6.07) (  68.27,   6.09)    1.16                57
 09/26/2013   02:06:23   (  68.46, 146.97) (  68.46, 146.92)    1.95                63
 09/26/2013   02:57:05   ( -68.38, -45.61) ( -68.36, -45.56)    3.01                 9
 09/26/2013   03:47:41   (  67.81, 122.42) (  67.85, 121.48)   39.63                71
 09/28/2013   18:23:20   (  68.43, -97.23) (  68.42, -97.25)    1.84                34
 09/28/2013   19:14:01   ( -68.30,  70.27) ( -68.32,  70.27)    2.56                37