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HMI Ring Diagrams
Pipeline Module Specifications
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rdfitc
Module Version
1.0 23 IV 2010
General Description
rdfitc implements the procedure of Basu and Antia (ApJ 512, 458;
Solar Phys 192, 469) for fitting 3-d solar acoustic power spectra to
a multi-parameter model for line and background characteristics
Status
This version has been superseded by Version 1.1
Included in JSOC release 5.9
The source code and Makefile are in the JSOC CVS repository
rdfitc_v10 is a compiled standalone DRMS binary built with NetDRMS 2.4
to run in the JSOC configuration. Versions are in:
~rick/bin/linux_x86_64/rdfitc_v10
~rick/bin/rick/rdfitc_v10
The source code and Makefile is in ~rick/src/ringfit/rdfitc
Usage
rdfitc [-nvx2] in= InputDescriptor out= OutputDescriptor
[param= val ...]
Flags
-n no fitting (diagnostics only)
-v run verbose
-x extra reporting of number of iterations
-2 calculate second derivatives explicitly
Parameters
in the name of an input data set (record selection); No default
guessfile Name of a file containing the initial frequency guesses;
should be a rooted pathname. No default:
out Name of the output data series (or file)
Default: fit.out
The value of the out parameter is interpreted as the name of
of a data series, and if such a series exists with insert
permission, the output fit files and logs will be inserted as
records in that series; otherwise, the value will be interpreted
as the name of a file to which the fit parameters are written,
and the log information goes to stderr.
nmin Minimum radial (vertical) order to fit. Default: 0
nmax Maximum radial order to fit. Default: 10
lmin Minimum equivalent spherical-harmonic degree to fit. Default: 80
lmax Maximum degree to fit. Default: 3000
fmin Minimum frequency to fit [μHz]. Default: 900
fmax Maximum frequency to fit [μHz]. Default: 7000
bfgsct Number of iterations for bfgs function.. Default: 125
linminct Number of iterations for linmim function.. Default: 15
ux Initial guess for zonal flow speed [m/s]. Default: 0.0
uy Initial guess for meridional flow speed [m/s]. Default: 0.0
Input Data series class:
power spectra of data cubes
Input keys used or inspected:
WCSNAME, CTYPE1, CTYPE2, CTYPE3, CUNIT1, CUNIT2, CUNIT3, CDELT1, CDELT2, CDELT3
DELTA_K*, RSunRef, DELTA_NU*, D_OMEGA*, LOG_BASE
* only if preferred keys not found
Sample input series:
mdi.rdVpspec_dp
hmi_test.rdVpspec_fd05
hmi_test.rdVpspec_fd15
hmi_test.rdVpspec_fd30
Output Data series class:
ring diagram mode fits
Output keys set (if possible):
CarrTime*, Module, Source, Created, BLD_VERS
* if not propagated
Input keys propagated to output (if possible):
CarrTime, CarrRot, CMLon, LonHG, LatHG, LonCM, MAI, MidTime, Duration,
Cadence, LonSpan, T_START, T_STOP, Coverage, Size, Width, Height,
MapProj, MapScale, Map_PA, PosAng, ZonalTrk, ZonalVel, MeridTrk, MeridVel,
Apode_f, Apode_k_min, Apode_k_max, APODIZNG, APOD_MIN, APOD_MAX
Sample output series:
mdi.rdVfitsc_dp
hmi_test.rdVfitsc_fd05
hmi_test.rdVfitsc_fd15
hmi_test.rdVfitsc_fd30
Significant changes from Previous Version
— Added numerous keywords to propagation list
— Removed constraints on values of parameters A0, B1, and B2, so
that fits are insensitive to power spectrum normalization
— Changed defaults for run parameters nmax, lmin, and lmax to be more
appropriate for HMI data
— Added quality flag column to output
Bugs in current version
The output column for δν (5) is labeled w_0 (and identical with
column 19), since there is no formal uncertainty on the frequency.
It should, however, be the uncertainty on w_0.
The quality parameters sn (amplitude/background) and pk (the fit
power-law exponent for ν(l) are not printed (simply because they
were not included in the standard).
If either of the flags -2x are given the output will not conform to
the standard.