Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 12 19.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2013   09:00:13   (  69.17,  42.91) (  69.07,  44.17)   51.54                69
 12/20/2013   09:50:44   ( -68.51,-148.87) ( -68.51,-148.89)    0.62                16
 12/20/2013   10:41:28   (  68.37,  18.62) (  68.35,  18.56)    3.18                60
 12/23/2013   01:17:01   (  68.58, 159.49) (  68.59, 159.45)    2.09                60
 12/23/2013   02:07:43   ( -68.51, -33.10) ( -68.49, -33.05)    3.06                12
 12/23/2013   02:58:17   (  67.83, 135.08) (  67.87, 133.87)   51.04                70
 12/25/2013   17:34:00   (  68.58, -84.75) (  68.58, -84.69)    2.44                31
 12/25/2013   18:24:40   ( -68.40,  82.81) ( -68.42,  82.75)    3.36                38
 12/28/2013   09:00:19   ( -68.94,-136.78) ( -68.82,-136.16)   28.25                72
 12/28/2013   09:50:58   (  68.54,  31.08) (  68.53,  31.13)    2.32                 3
 12/28/2013   10:41:38   ( -68.36,-161.36) ( -68.38,-161.43)    3.41                66
 12/31/2013   01:17:11   ( -68.64, -20.59) ( -68.63, -20.52)    3.35                51
 12/31/2013   02:07:54   (  68.45, 146.96) (  68.45, 146.91)    2.29                24
 12/31/2013   02:58:21   ( -67.57, -44.60) ( -67.63, -46.43)   77.48                68