Parameter

Purpose

Values

numiter

Specifies when to stop iterating.

default : -5
dimmconfig_jsa_generic : -25
dimmconfig_bright_extended : -40
dimmconfig_bright_compact : -40
dimmconfig_blank_field : 4

maptol

Specifies when to stop iterating.

default : 0.05
dimmconfig_jsa_generic : 0.01

modelorder

Specifies which models to include in the iterative process, and the order in which they are evaluated.

default : (com,gai,ext,flt,ast,noi)
dimmconfig_blank_field : (com,ext,ast,noi)

hitslimit

Rejects map pixels that receive very few samples.

default : 0.01

Parameter

Purpose

Values

fakemap

Diagnostic tool to explore the effects of the map-making process on known sources.

default : <undef>

fakescale

Control the use of the supplied fake map.

default : 1

exportndf

Create NDFs holding final model values.

default : 0

itermap

Create NDFs holding the map created by each iteration.

default : 0

bolomap

Create NDFs holding the map made form each bolometer.

default : 0

shortmap

Create NDFs holding the map made form a short chunk of data.

default : 0

diag.out

Switches on the dumping of various diagnostic information.

default : <undef>

Parameter

Purpose

Values

downsampscale

Speeds up map-making, and reduces memory requirements.

default : -1

maxlen

Determines how the input time-series data is split into chunks

default : 0

doclean

Allows pre-cleaned data to be used.

default : 1

exportclean

Allows the initial cleaned data to examined or saved for later use.

default : 0

order

Baseline removal

default : 1

Ensures that bad data from DA system are ignored

default : 0.05

compreprocess

Remove common-mode before the iterative algorithm begins.

default : 0

dcthresh

Control the cleaning of DC steps in bolometer time streams

default : 25.0
dimmconfig_jsa_generic : 100
dimmconfig_bright_compact : 100

dcfitbox

Control the cleaning of DC steps in bolometer time streams

default : 30

dcmaxsteps

Control the cleaning of DC steps in bolometer time streams

default : 4

dclimcorr

Control the cleaning of DC steps in bolometer time streams

default : 0

dcsmooth

Control the cleaning of DC steps in bolometer time streams

default : 50

spikethresh

Controls time-based spike detection within initial data cleaning.

default : 0
dimmconfig_blank_field : 10

spikebox

Controls time-based spike detection within initial data cleaning.

default : 50

whiten

Experimental.

default : 0

noisecliphigh

Reject bolometers based on their noise.

default : 4
dimmconfig_jsa_generic : 10.0
dimmconfig_bright_compact : 10.0

noisecliplow

Reject bolometers based on their noise.

default : 0

noiseclipprecom

Reject bolometers based on their noise.

default : 0

flagslow

Flag data when we’re moving too slowly

default : 30

flagfast

Flag data when we’re moving too fast

default : 1000

filt_edgelow

Specifies the highest frequency to be retained by the initial data cleaning.

default : 0

filt_edge_largescale

Specifies the largest scale size to be retained by the initial data cleaning.

default : 0
dimmconfig_blank_field : 200

filt_edge_smallscale

Specifies the smallest largest scale size to be retained by the initial data cleaning.

default : 0

filt_order

Indicates the shape of the filter.

default : 0

Parameter

Purpose

Values

com.perarray

Controls the estimate of the common-mode signal

default : 0
dimmconfig_jsa_generic : 1
dimmconfig_bright_compact : 1
dimmconfig_blank_field : 1

com.sig_limit

Controls the rejection of time slices with inconsistent common-modes.

default : 0

com.noflag

Controls the rejection of bad samples from the COM estimate

default : 0

com.corr_tol

Controls the rejection of bad samples from the COM estimate

default : 5
dimmconfig_bright_compact : 7

com.corr_abstol

Controls the rejection of bad samples from the COM estimate

default : 0.2

com.freeze_flags

Controls flagging of samples that differ from the common-mode.

default : 0

com.gain_tol

Controls the rejection of bad samples from the COM estimate

default : 5
dimmconfig_bright_compact : 7

com.gain_abstol

Controls the rejection of bad samples from the COM estimate

default : 3
dimmconfig_bright_compact : 5

com.gain_box

Controls the rejection of bad samples from the COM estimate

default : -30.0

com.gain_fgood

Controls the rejection of bad samples from the COM estimate

default : 0.25

com.gain_rat

Controls the rejection of bad samples from the COM estimate

default : 4

com.zero_mask

Provides a better estimate of the common-mode ("COM") signal, by excluding samples that fall within fixed regions on the sky specified by an external mask.

default : 0

com.zero_circle

Improves common-mode estimation by excluding sources within a circle of given radius from the COM estimate.

default : <undef>

com.zero_lowhits

Improves common-mode estimation by excluding sources in regions containing many data samples.

default : 0

com.zero_snr

Improve the estimate of the common-mode by excluding samples that correspond to high SNR pixels in the map.

default : 0

com.zero_snr_ffclean

Provides alternative method for SNR masking.

default : 0

com.zero_snrlo

Improve estimate of the common-mode by increasing the size of the SNR mask without introducing noise.

default : <undef>

com.zero_union

Controls how multiple COM masks are combined.

default : 1

com.zero_freeze

Prevent the COM mask from changing after a given number of iterations. This can help convergence.

default : 0.0

Parameter

Purpose

Values

noi.calcfirst

Determines when the noise in each bolometer is estimated.

default : 0

noi.box_size

Allow finer estimation of the noise levels in the time-series data.

default : -15

noi.box_type

Determines how the noise in each box is found.

default : 1

Parameter

Purpose

Values

flt.filt_edge_largescale

Specifies the largest scale size to be retained by the FLT model.

default : 
dimmconfig_jsa_generic : 200
dimmconfig_bright_extended : 480
dimmconfig_bright_compact : 200

flt.filt_edge_largescale_last

Specifies the largest scale size to be retained by the FLT model on the last iteration.

default : <undef>

flt.filt_order

Indicates the shape of the filter.

default : 0

flt.ring_box1

Controls the flagging of samples that suffer from ringing.

default : 0

flt.zero_mask

Speeds up convergences and reduces ringing by excluding sources within a region specified by an external mask file from the filtering performed by the FLT model.

default : 0

flt.zero_circle

Speeds up convergences and reduces ringing by excluding sources within a circle of given radius from the FLT estimate.

default : <undef>
dimmconfig_bright_compact : 0.016666

flt.zero_lowhits

Experimental.

default : 0

flt.zero_snr

Speeds up convergences and reduces ringing by excluding samples that correspond to high SNR pixels in the map.

default : 0
dimmconfig_jsa_generic : 5
dimmconfig_bright_extended : 5

flt.zero_snr_ffclean

Provides alternative method for SNR masking.

default : 0

flt.zero_snrlo

Speeds up convergences and reduces ringing by increasing the size of the SNR mask without introducing noise.

default : <undef>
dimmconfig_jsa_generic : 3
dimmconfig_bright_extended : 3

flt.zero_niter

Allows FLT masking to be switched off after a given number of iterations.

default : 2

flt.zero_union

Controls how multiple FLT masks are combined.

default : 1

flt.zero_freeze

Prevent the FLT mask from changing after a given number of iterations. This can help convergence.

default : 0.0

flt.notfirst

May improve convergence by avoiding the filtering of strong sources on the first iteration.

default : 0

Parameter

Purpose

Values

ext.tausrc

Controls the extinction values used in the EXT model.

default : auto

ext.taumethod

Controls the extinction values used in the EXT model.

default : adaptive

ext.taurelation.450

Controls the 450 um extinction values used in the EXT model and the EXTINCTION task.

default : (23.3,-0.018,0.05)

ext.taurelation.850

Controls the 850 um extinction values used in the EXT model and the EXTINCTION task.

default : (3.71,-0.040,0.202)

ext.csotau

Controls the extinction values used in the EXT model.

default : <undef>

ext.filtertau

Controls the extinction values used in the EXT model.

default : <undef>

Parameter

Purpose

Values

ast.mapspike

Removes spikes from the map.

default : 10

ast.skip

Skip subtraction of astronomical signal.

default : 0
dimmconfig_jsa_generic : 5
dimmconfig_bright_extended : 5

ast.zero_mask

Reduces spurious large scale structure in the final map within fixed regions specified by an external mask.

default : 0

ast.zero_circle

Reduces spurious large scale structure in the final map outside a circle of given radius.

default : <undef>
dimmconfig_bright_compact : 0.016666

ast.zero_lowhits

Reduces spurious large scale structure in the final map in regions containing few data samples.

default : 0

ast.zero_snr

Reduces spurious large scale structure in the final map within regions of low signal-to-noise.

default : 0.0
dimmconfig_jsa_generic : 5
dimmconfig_bright_extended : 3

ast.zero_snr_ffclean

Provides alternative method for SNR masking.

default : 0

ast.zero_snrlo

Can help to remove bowls around sources by increasing the size of the SNR mask without introducing noise.

default : <undef>
dimmconfig_jsa_generic : 3
dimmconfig_bright_extended : 2

ast.zero_snr_fwhm

Can help to remove bowls around sources.

default : 0

ast.zero_snr_low

Can help to remove bowls around sources.

default : -1.1

ast.zero_union

Controls how multiple AST masks are combined.

default : 1

ast.zero_freeze

Prevent the AST mask from changing after a given number of iterations. This can help convergence.

default : 0.0

ast.zero_niter

Allows AST masking to be switched off after a given number of iterations.

default : 0

ast.zero_notlast

Allows flux to be present in masked areas in the final map.

default : 1