Passive/Active Radar: Electromagnetic Scattering Data (Restricted Access)
Main | Links | Papers |
Research | Project Only | UIUC Only |
FISC CAD models
- f22_aligned.facet is a
model of a Lockheed Martin F-22 Raptor adapted from a file purchased from
Viewpoint Digital - stealth_fixed.facet is a model of a
stealth fighter developed by Aaron Lanterman
Lower VHF FISC data
The following MATLAB files each contain four variables (containing
complex far-field values): fisc_hh, fisc_hv,
fisc_vh, and fisc_vv, each corresponding to a different polarization.
Each variable is a 5 by 360 by 37 array (expect for aaron_sphere_vhf.mat,
which is just a 5 by 360 array). The first dimension corresponds to the
five frequencies associated with NTSC TV channels 2 through 6
(55.25 to 79.25 MHz, with a 6 MHz spacing.) The second dimension corresponds
to the observation azimuth angle, ranging from 0 to 359 in 1 degree
increments. The final dimension corresponds to the incident azimuth angle,
ranging from 0 to 180 in 5 degree increments. For the aircraft, 0 degree
is looking at the nose, 90 degree at the side, and 180 degree at the tail.
The elevation angle (both observed and incident) is zero degrees.
The sphere file only needs one incident angle due to symmetry.
The above files were created using a special version of FISC that can
loop through both incident and observed angles in one run. The input files
were
After reading the *.field file output by FISC using read_fisc_field_file
(given below), fisc_vv, etc. were created by entering commands like this
into MATLAB:
num_freqs = 5; num_obs = 360; num_inc = 37;
fisc_hh = reshape(hh,num_freqs,num_obs,num_inc);
fisc_vv = reshape(vv,num_freqs,num_obs,num_inc);
fisc_vh = reshape(vh,num_freqs,num_obs,num_inc);
fisc_hv = reshape(hv,num_freqs,num_obs,num_inc);
save vfy_vhf fisc_hh fisc_hv fisc_vh fisc_vv
30 Degree Elevation, Lower VHF FISC Data
These are FISC data files, for channels 2-6,
in the same MATLAB format described above,
except at 30 degrees elevation (either plus or minus). They were created
by Michael Brandfass.
Higher VHF FISC data
Like above, except each variable is a 7 by 360 by 91 array.
The first dimension corresponds to the
seven frequencies associated with NTSC TV channels 7 through 13
(175.25 to 211.25 MHz, with a 6 MHz spacing.) The second dimension corresponds
to the observation azimuth angle, ranging from 0 to 359 in 1 degree
increments. The final dimension corresponds to the incident azimuth angle,
ranging from 0 to 180 in 2 degree increments.
The elevation angle (both observed and incident) is zero degrees.
The input files were
- stealth_vhfhigh.fisc_input
(wall clock runtime: 2 days, 58 min on eir.ncsa, 1 process, peak memory: 201.4M)
The MATLAB files were made from the field file as above, except here
num_freqs = 7; num_obs = 360; num_inc = 91;
FM radio FISC data
Like above, except each variable is a 4 by 360 by 61 array.
The first dimension corresponds to radio stations at frequencies
88, 94, 100, and 106 MHz. The second dimension corresponds
to the observation azimuth angle, ranging from 0 to 359 in 1 degree
increments. The final dimension corresponds to the incident azimuth angle,
ranging from 0 to 180 in 3 degree increments.
The elevation angle (both observed and incident) is zero degrees.
The input files were
- stealth_fmradio.fisc_input
(statistics unavailable)
The MATLAB files were made from the field file as above, except here
num_freqs = 4; num_obs = 360; num_inc = 61;
Last updated 3/5/01. Send comments or questions to
lanterma@ifp.uiuc.edu.