Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 7 20.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2013   10:39:01   ( -68.93,-161.97) ( -68.80,-160.81)   48.57                70
 07/21/2013   11:29:35   (  68.27,   6.21) (  68.25,   6.16)    3.20                11
 07/21/2013   12:20:16   ( -68.13, 173.71) ( -68.15, 173.67)    2.83                60
 07/24/2013   02:55:50   ( -68.38, -45.47) ( -68.35, -45.51)    3.18                65
 07/24/2013   03:46:34   (  68.26, 121.99) (  68.25, 122.00)    1.04                12
 07/24/2013   04:37:09   ( -67.79, -70.10) ( -67.87, -70.81)   31.11                72
 07/26/2013   19:12:49   ( -68.36,  70.31) ( -68.37,  70.34)    2.03                46
 07/26/2013   20:03:33   (  68.24,-122.23) (  68.21,-122.21)    3.20                30
 07/26/2013   20:53:57   ( -67.18,  46.39) ( -67.23,  44.30)   90.43                68
 07/29/2013   11:29:47   ( -68.35,-173.91) ( -68.36,-173.86)    3.05                32
 07/29/2013   12:20:31   (  68.23,  -6.45) (  68.20,  -6.41)    3.12                44
 08/01/2013   02:56:19   (  69.23, 133.34) (  69.13, 135.26)   76.97                67
 08/01/2013   03:46:46   ( -68.33, -58.13) ( -68.32, -58.11)    1.14                23
 08/01/2013   04:37:29   (  68.16, 109.40) (  68.16, 109.34)    2.39                52