Frequency Scan Parameters¶
The &scan
namelist group(s) defines frequency grid parameters;
the input file can contain one or more, and points defined by each
(tag-matching) &scan
namelist group are merged
together. Allowable parameters are:
grid_type
(default'LINEAR'
)Distribution of frequency points; one of:
'LINEAR'
: Uniform in frequency'INVERSE'
: Uniform in inverse frequency'FILE'
: Read from file
grid_frame
(default'INERTIAL'
)Reference frame in which
grid_type
applies; one of:'INERTIAL'
: Inertial frame'COROT_I'
: Co-rotating frame at inner boundary'COROT_O'
: Co-rotating frame at outer boundary
freq_min
(default1
)Minimum frequency, when
grid_type
is'LINEAR'
or'INVERSE'
freq_max
(default10
)Maximum frequency, when
grid_type
is'LINEAR'
or'INVERSE'
n_freq
(default10
)Number of frequency points, when
grid_type
is'LINEAR'
or'INVERSE'
freq_units
(defaultNONE
)Units of
freq_min
andfreq_max
, whengrid_type
is'LINEAR'
or'INVERSE'
; units of read frequencies whengrid_type
is'FILE'
'NONE'
: Dimensionless angular frequency'HZ'
: linear frequency in Hz1'UHZ'
: linear frequency in μHz1'RAD_PER_SEC'
: angular frequency in radians per second1'CYC_PER_DAY'
: linear frequency in cycles per day1'ACOUSTIC_DELTA'
: Fraction of the asymptotic acoustic large frequency separation \(\Delta \nu\)'GRAVITY_DELTA'
: Fraction of the asymptotic inverse gravity period separation \((\Delta P)^{-1}\)'UPPER_DELTA'
: Greater of \(\Delta \nu\) and \((\Delta P)^{-1}\)'LOWER_DELTA'
: Lesser of \(\Delta \nu\) and \((\Delta P)^{-1}\)'ACOUSTIC_CUTOFF'
: fraction of the acoustic cutoff frequency1'GRAVITY_CUTOFF'
: fraction of the gravity cutoff frequency1'ROSSBY_I'
: fraction of Rossby frequency (see equation (10)) at inner boundary'ROSSBY_O'
: fraction of Rossby frequency (see equation (10)) at outer boundary
freq_min_units
(default''
)Units of
freq_min
; same options asfreq_units
and overrides it if setfreq_max_units
(default''
)Units of
freq_max
; same options asfreq_units
and overrides it if setfreq_min_frame
(default'INERTIAL'
)Reference frame in which
freq_min
, whengrid_type
is'LINEAR'
or'INVERSE'
; one of:'INERTIAL'
: Inertial frame'COROT_I'
: Co-rotating frame at inner boundary'COROT_O'
: Co-rotating frame at outer boundary
freq_max_frame
(default'INERTIAL'
)Frame of
freq_max
; same options asfreq_min_frame
file
File to read frequencies from, when
grid_type
is'FILE'
axis
(default'REAL
’)Axis that scan applies to; one of
'REAL'
: Real axis'IMAG'
: Imaginary axis
tag_list
(default''
, which matches all)Comma-separated list of
&mode
tags to match
See the Frequency Grids section for further details.
Footnotes