Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/~palfa/doc/asp_processing.txt Дата изменения: Thu Aug 24 11:57:03 2006 Дата индексирования: Sun Apr 10 06:16:38 2016 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п

Overview
--------
The quick processing ftps, demultiplexes and searches the resulting
individual pixels at low resolution (32 x 3.125 MHz channels and 1.024 ms
sampling). Currently a standard FFT (seek) and single-pulse searches
(Cornell code) are run on the quick pipeline. The results are written to
/home/alfa/realtime/results on the ASP but are best viewed through the php
web server (see below).


Starting the processing
-----------------------
ssh into aspmaster as alfa using the well-known password.

cd ~/realtime and run ./nodestatus

Clear the files from the last run. If the processing is on going (indicated
by a green background in the status list) you should not clear the files.

Start the processing.

The view results button will open Mozilla at the appropriate page.

Once the processing has finished (typically a couple of hours after obs end)
stop the proceeding.

If ftping has been manually stopped this can be restarted by running
~/bin/autoftp wappN &


Notes on the processing
-----------------------
You can run multiple instances of nodestatus.

A yellow background to the available space label on a node indicates that
this node will be skipped until there is more space.

You can manually stop ftp to a node using the FtpSkip button (e.g. if a node
is misbehaving)

AutoSkip will automatically skip a node which has 5 or more queued
pointings. This will also show as a yellow background to the number of files
label.

If a processing script crashes the status for that node will not be updated.
The time will give you an indication of a problem. The Unclog button will go
yellow if a node is not heard from for more that 45 mins. Pressing this
button at any time will move the node onto the next pointing. AutoUnclog
will do this automatically after 45mins (this is very much a beta right now).


Notes on the Candidate Viewer
-----------------------------
The candidate viewer can be run from any browser on any computer on the AO
network, not just ASP.

Enter the URL http://aspmaster.naic.edu:8080/alfa/viewer.php and it will
show you the results for today.

At the top you can choose to see results for a specific MJD and scan number
range. You can also choose to look at the saved candidates.

There is a box where you can enter your name or initials. This will allow
you to keep track of the beams which 'you' have viewed.

Any beam which 'you' have viewed will be subsequently highlighted in green.
A light green colour indicates that someone has viewed the beam.

In the 'view candidates' page the top 10 candidates and the result of the
single pulse search are listed. Clicking on the figure will link you to the
full ps file. If there is a nearby pulsar (within 10 arcmin of the central
beam) in the pulsar catalogue it will appear at the top of the page.

Plots for candidates that fall in one of the
Pmin Pmax SNRmin SNRmax DMmin DMmax
ranges defined in the ~alfa/.rfi file are replaced by a "filtered signal"
link to the plot to allow some very basic customizable
filtering. If you've entered in the top-right corner box, the filter
will use file ~alfa/.rfi in stead.

If you use the same username from a different browser or at a different time
the beams which you have viewed will be retained.

You may 'save a candidate' by choosing a class on the far right of the
candidate. You can change this at any time. NOTE: This is global and does
not depend on the name you may have entered.