Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 3 18.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 03/20/2013   19:12:17   ( -69.19,  69.09) ( -69.06,  71.18)   84.42                67
 03/20/2013   20:02:44   (  68.18,-122.25) (  68.17,-122.27)    0.98                21
 03/20/2013   20:53:26   ( -68.09,  45.19) ( -68.06,  45.24)    3.41                51
 03/23/2013   11:28:51   ( -68.75,-174.48) ( -68.66,-173.44)   43.52                70
 03/23/2013   12:19:26   (  68.17,  -6.41) (  68.16,  -6.40)    1.44                 9
 03/23/2013   13:10:07   ( -68.04, 161.08) ( -68.06, 161.11)    2.73                62
 03/26/2013   03:45:21   ( -68.66, -58.48) ( -68.53, -57.72)   33.98                71
 03/26/2013   04:35:57   (  68.14, 109.50) (  68.13, 109.45)    2.41                 7
 03/26/2013   05:26:39   ( -68.06, -83.08) ( -68.03, -83.04)    3.27                65
 03/28/2013   20:01:48   ( -68.85,  57.17) ( -68.71,  58.38)   50.88                70
 03/28/2013   20:52:21   (  68.17,-134.63) (  68.20,-134.60)    3.26                11
 03/28/2013   21:43:02   ( -68.05,  32.85) ( -68.04,  32.85)    0.36                59
 03/31/2013   12:18:11   ( -69.32, 172.46) ( -69.25, 174.96)   98.35                66
 03/31/2013   13:08:35   (  68.17, -18.69) (  68.19, -18.73)    2.27                26
 03/31/2013   13:59:16   ( -68.05, 148.79) ( -68.04, 148.73)    3.23                44