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Knowledgebase : Archive & Data Retrieval
The ALMA calibrator database is accessible at the ALMA Science Portal [http://almascience.org/sc/]. It provides a history of flux densities at given frequencies and angular structure information or limits for more than 3000 sources. In addition, process...
If you are the PI of an ALMA proposal that got data, you can delegate access to these data during the proprietary period to anyone with an ALMA account (Co-I's or other ALMA users).  To do this, log into the ALMA Science Portal [http://almascience.org/]...
The simplest method is to first use a standard web-browser (e.g. on a laptop), query the archive, select the data to download and then chose the "download script" option from the ALMA Request Handler. This script can then be copied to the machine that doe...
Yes! For data from Cycle 5 onwards data-files can be downloaded individually from the Request Handler.  Search for your data on https://almascience.org/aq, [https://almascience.org/aq,] select the data you are interested in, click on 'Submit download requ...
ALMA calibration data are public from the time the observations are taken, but most calibration data is contained in EBs that also contain proprietary data. You may submit a Helpdesk ticket to your ARC to obtain the calibration data if you wish, and we wi...
Yes. Click on the "Target list" input field in the Position menu of the ALMA Science Archive [http://almascience.org/aq] and upload your target list from your computer. The list must be an ascii file with one source name or position per line. The RA a...
Yes, this is possible. Check the "public data only" checkbox in the Options menu and enter '0' into the "Publication count" field in the Project menu. Then hit "Search".
For Cycles 5 and onwards, raw data and processed data are ingested into the archive as individual files. Upon retrieval - optionally - they are packaged together into tarfiles for better downloads. Data from earlier cycles are directly stored as tar files...
Once you have entered query constraints into the Archive query interface at http://almascience.org/aq [http://almascience.org/aq] and hit "Search" you will see the results of your query. In order to download the results table and look at it e.g. in Topcat...
ALMA datasets can be very large, and take many hours to download. However, there are a couple of steps a user can take to minimize the wait: * Ensure you are on a good internet connection. Many commercial home internet providers will allow you to star...
To query one of the following options can be used: * You can query for a target list directly on the query interface. (Note that in this case the Export Table or Bookmark Result do not work). * You can can write a shell script that goes through the ...
The ALMA calibrator database can be directly queried through a web form at http://almascience.org/sc/ [http://almascience.org/sc/]. Alternatively, you can query the ALMA calibrator database from the OT in this way: * Open up the OT and create a Scie...
On the results page of the Archive query interface at http://almascience.org/aq [1] click with the mouse on the "more columns" link in the top left corner. All columns above the red bar will be displayed. Use the mouse to either drag&drop the red bar or a...
ALMA raw data (asdm), data products (images or cubes), and auxiliary data (scripts, logs and quality assessment figures) are stored in the archive for each data delivery. This data includes the calibration and flagging tables.  The FITS products delivere...
The ALMA TP data is generally reduced using the TP data reduction pipeline which performs calibration and imaging; very few are reduced manually using standard scripts. You can determine whether your data was reduced by Pipeline by looking for a file "PPR...
From time to time one of the ARCs is undergoing maintenance and the Archive Query interface and/or the Request Handler might be temporarily down. For longer outages such maintenance is announced on the front page of the Science Portal of the ARC. As...
We are not accepting user-donated ALMA data products into the ALMA archive unless they are part of Large Programs. We would be very much interested in learning about your motivation and the requirements you have, so please write us a Helpdesk ticket. We a...
Restoring the calibrated measurement set ------------------------------------------------- Calibration is the first step of processing interferometric data. Many users will want to recreate the calibrated measurement set and perform the second step (imag...
Yes! In case you get an interrupted download just rerun the downloadscript (or continue in the download manager downloads). The software will detect that part of the file is already downloaded and will only fetch the remaining part of the files. Thi...
In general, the release of raw, uncalibrated data to a PI is _strongly discouraged_ and only under specific conditions will the raw data of an observing program be delivered before quality assurance is completed by ALMA staff. These policies are descri...
What you see in your data package when you download it from the archive will depend on whether the imaging and calibration have been performed by the pipeline, or one or both via a manual process. Except for datasets that were put through the imaging pipe...
QA0 (Quality-Assurance stage 0) is a near-real-time verification of data quality performed at the time of data taking. It reflects the quality of the calibrations included in the Scheduling Block (SB) as well as other basic parameters of the observations....
Cycle 5 data deliveries currently may not contain an informative README. Unfortunately, the tools that package and ingest data into the archive are not yet placing a QA2 report in the qa directory.  As PI or Co-I of a project, to find the QA0 and QA2 repo...
Science Verification data can now be searched and downlaoded directly from the ALMA Science Archive interface at https://almascience.org/asa. In addition, a table of ALMA Science Verification (SV) targets and observing parameters is provided at the "Data...
The fully-calibrated MS which includes only the science target data has been provided as an additional "Added Value" service to North American PIs. However, if you would rather start from scratch using the archive products to process your data, detailed i...
Any user can get a listing of the projects or sources that were observed by ALMA on any given date with a simple query to the ALMA Data Archive, accessed from the Science Portal by following the left menu link "Data → Archive", and clicking the "Archive Q...
For Mac OS and linux users the recommended internet browser to use for full functionality of the pipeline weblog viewing is FIREFOX. Other browsers such as the default Safari, or the often used Chrome _do not_ provide full support for the weblog interfac...
Since Cycle 5, the PI has had the ability to input a range of resolutions in the OT (a single value is considered a very tiny range). Based on this information, the OT writes a range of acceptable angular resolution into the Scheduling Block as follows: ...
We do recommend the use of the download script for data-download from ALMA. Nevertheless sometimes problems with the data download can occur. Typically an error message "Error code 8" is obtained which translates to "Internal Server Error" and indicates a...
As of 2018 ALMA Science Verification data can be searched for and downloaded from the ALMA Science Archive interface at https://almascience.org/aq [https://almascience.org/aq]. They are also available from the ALMA Science Portal at http://almascience.org...
The North American ALMA archive query interface (http://almascience.nrao.edu/aq/) has security settings which prevent a user from uploading a list of sources or positions to query. However, the European (http://almascience.eso.org/aq/) and East Asian (htt...