After unzipping the archive: r1.zip

You should have directories full of *.fld files. These are the raw
data, so ignore the other files in the directory (or delete them).
Each .fld contains a single angular scan at a specific r and z. The
.fld files are numbered in order from 001.

Each .fld file starts something like:

I,z,r = 1.000000, 3.500000, 3.000000
0	-442.5
5.625	-432.6
11.25	-406.1
16.875	-364.7
22.5	-309.5
28.125	-243.1
33.75	-167.1
.......

The first line specifies the lens current in Amps (I), the axial
coordinate in mm (z), and the radial coordinate in mm (r) at which the
scan was taken.

The rest of the file is full of \theta, B_r data pairs. That is, the
first column is the theta coordinate for the measurement in degrees.
The second column is the measured radial component of the magnetic
field in gauss. The Hall Probe sampling area is ~1mm^2, if that is of
interest. There are usually, 64, 128 or 256 points in each file.

There are usually between 5 and 12 angular scan performed at each
value of z, with r values going from 0 to ~6 mm.

It's as simple as that. Let me know if there is a problem, or if what
I have said doesn't fit the data you have.

Data collected by -- 

  Glenn Moloney				glenn@physics.unimelb.edu.au
  School of Physics,			http://www.ph.unimelb.edu.au/~glenn
  University of Melbourne,		Phone: +61 3 9344 4012
  Parkville, Australia 3052.		Fax:   +61 3 9347 4783

Inquiries to --

Assoc. Prof. David N. Jamieson   Director: Microanalytical Research Centre
School of Physics                               Phone: + 61 (0)3 9344 5376
University of Melbourne                           Fax: + 61 (0)3 9347 4783
Parkville, 3052                          Email: dnj@physics.unimelb.edu.au
AUSTRALIA                           Web: http://www.ph.unimelb.edu.au/~dnj