This folder has the phase velocity data used in our paper. (Ma et al., 2014, A comprehensive dispersion model of surface wave phase and group velocity)

(1) file names
There is a separate file for each frequency and wave type (ph=Rayleigh and phl=Love).  For example, ph10.abs means Rayleigh wave at 10mHz. 

For intermediate frequencies, file name ends with 'merge'. For example, Rayleigh wave 12.5mHz (ph12.5.abs.merge) is done automatically from the clusters in 10 and 15mHz separately. We have merged the two into one file in this folder.

(2) content of each file
An example of reading each file is

        read(7,887) kk,ky,kd,kh,km,ssk,th,ph,d0,ioff,nxcor,
     +               rrmin,snr0
  887   format(i5,i6,i4,2i3,f7.3,3f9.3,2i5,2f9.3)
        
        do k=1,kk
          read(7,888) nsta,tbest,terr,
     +      scale,scale_se,pol,ravg,time,azisv,distsv,snr,ttmx,ktyp
     +      ,tt1,te1
  888       format(a4,11f10.3,2x,a2,2f10.3)
        enddo


The meaning of each variable is
kk:  number of records in this cluster
ky,kd,kh,km,ssk:  event origin time (PDE catalog) (year, day, hour, minute and second)
th,ph,d0:  CMT centroid location (colatitude,longitude and depth)
ioff,nxcor:  window we use to make the measurement
rrmin,snr0:  minimum cross-correlation coefficient and signal-to-noise ratio

nsta:  station name
tbest,terr:  travel time anomaly (dt) and its error  (in seconds)
scale,scale_se:  preliminary amplitude variation and its error (will be updated)
pol:  apparent frequency
ravg:  average cross-correlation coefficient
time:  1D reference arrival time
azisv,distsv:  azimuth and distance (in degrees)
snr:  signal to noise ratio
ttmx:  can be ignored
ktyp:  network code
tt1,te1:  for intermediate frequencies (file name ends with merge), the average of tbest and terr for the two repeated records.  terr is set to negative for the second record.

One of the most useful information is the average velocity (km/sec) between each source-station pair, and it can be estimated by using
distsv*111.1949/(tbest+time)


If you have any questions or comments or find any bugs, feel free to email me (Zhitu Ma z1ma@ucsd.edu).