Getting Started

Documentation

Glish

Learn More

Programming

Contact Us

Version 1.9 Build 1488

News	FAQ
Search	Home

sdaverager - Tool

	Package	dish
	Module	dish

Postscript file available

A tool for averaging single dish data

include "sdaverager.g"

Constructors

sdaverager

An sdaverager

Functions

accumiterator	Add an entire iterator to the internal accumulation
accumulate	Add the data array to the internal accumulation.
average	Get the current internal accumulation
clear	Clear the on-going average.
dorestshift	Do we align by rest frequency?
getalignment	Return the current alignment option.
getweighting	Return the current weighting option.
restshiftstate	Are we aligning by rest frequency?
setalignment	Set the alignment option.
setweighting	Set the weighting option.

Description
This tool is intended to be used with dish, the single dish environment. It averages single dish data including the contents of an Sditerator tool with a single function call.

Example

sdit := sditerator('dishdemo1')
avger := sdaverager()
avger.clear()
avger.setalignment('VELOCITY')
avger.setweighting('TSYS')
avger.dorestshift(T)
ok := avger.accumiterator(sdit)
ok := avger.average(newarr, newtsys, newcrpix, newcrval, 
                    newcdelt, newcunit, newctype, newveldef, 
                    newrestfreq, newexposure, newduration)

The first line makes an sditerator from a file. The second line makes the averager tool. The averager is then cleared before the accumulation starts. Various options are set. The entire sditerator is then averaged. The resulting averaged array, system temperature, x-axis description, rest frequency, exposure, and duration are then requested from the averager. At this point, additional sdrecords from other iterators or other sources could continue to be added to this on-going average. If a new average is to be started, the averager must first be cleared.

See Also
dish reference manual Using Dish sditerator tool