Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 9 16.  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   ( -68.67, -33.30) ( -68.63, -32.88)   17.41                71
 09/18/2013   02:56:59   (  68.36, 134.41) (  68.36, 134.42)    0.89                 0
 09/18/2013   03:47:40   ( -68.25, -58.11) ( -68.25, -58.07)    1.81                71
 09/20/2013   18:23:12   ( -68.47,  82.73) ( -68.45,  82.78)    3.11                48
 09/20/2013   19:13:56   (  68.33,-109.77) (  68.33,-109.72)    2.37                29
 09/20/2013   20:04:20   ( -67.29,  58.83) ( -67.34,  56.77)   88.54                67
 09/23/2013   09:49:39   (  69.21,  30.18) (  69.08,  31.82)   66.23                68
 09/23/2013   10:40:07   ( -68.39,-161.39) ( -68.37,-161.44)    3.08                21
 09/23/2013   11:30:51   (  68.25,   6.10) (  68.25,   6.06)    1.68                56
 09/26/2013   02:06:23   (  68.49, 146.93) (  68.48, 146.95)    1.13                62
 09/26/2013   02:57:04   ( -68.36, -45.58) ( -68.33, -45.60)    3.42                 8
 09/26/2013   03:47:40   (  67.79, 122.44) (  67.87, 121.50)   40.50                71
 09/28/2013   18:23:19   (  68.42, -97.20) (  68.43, -97.23)    1.77                34
 09/28/2013   19:14:00   ( -68.28,  70.29) ( -68.28,  70.22)    2.73                36