Processing SMA Data
1.2 m Telescopes

Accessing SMA Data

Accessing Raw Data from the RTDC

The RTDC machines have a local copy of all raw SMA science data (2004-present), along with the past couple of year worth of flux and baseline data. If you have an account with the RTDC you can log in to any RTDC machine and access SMA data from the locations listed in the table below.

If you are member of R&G and would like an account, email Holly Thomas and supply your CF username.

Type Data Year Location
Science current year /sma/data/science/mir_data
Science 20xx /sma/data/science/mir_data.20xx
Flux From 2014 /sma/data/flux/mir_data.20xx
Baseline From 2014 /sma/data/baseline/mir_data.20xx

To access historical non-science data please visit the SMA machines in Hilo.

•  ALL data is subject to the 15 month proprietary period. If you are not a member of the project, please limit your access to non-proprietary data only.
•  Prior to May 2007, all non-science data were mixed in with the science data.
•  Pointing, flux and baseline data can also be searched/filtered through the Calibration Archive web page. However, the results do not link to the data files.

If you do not know what file to access, you should visit the SMA Data Archive and use the available filters (source name, project code, tuning etc).

Accessing Raw Data from Outside the CfA

All raw SMA data (science, flux, baseline) is available to external users through the SMA Data Archive. Proprietary data is listed but not available to download, except by the PI and authorized users who should go through the Proprietary Archive.

Accessing Calibrated Science Data

Calibrated data is available for a subset (1943) of sources observed between April 2008 and October 2015. These data have been calibrated using the MIR software package (see a sample MIR calibration script ), then ported into MIRIAD. The final calibrated data are available in MIRIAD format.

All users must use the SMA Data Archive to search for and download calibrated data. You can also search through the SMA Processed Imaged Archive but this will only show the subset of files that have gone on to be imaged (just 404/1943).

Accessing Imaged Science Data

A small subset (404) of sources from 2007 and 2008 have been fully imaged using MIR and MIRIAD (see a sample imaging script).
All users must use the SMA Data Archive, or the dedicated SMA Processed Imaged Archive where imaged data can be downloaded as JPG plots or FITS cubes.

Online Data Archives

SMA Data Archive     The primary science archive. Contains all raw data, including flux and baseline, along with calibrated and imaged science.
Proprietary Data Archive     Where PIs and authorized users can download proprietary raw data
SMA Calibration Archive     An easy way to search pointing, flux and baseline data by source, type or date. Files are not available to download.
SMA Processed Imaged Archive     Access data that has been imaged, along with the raw and calibrated files for each source.

File sizes

Science data taken with the ASIC correlator have typical raw file sizes of ~10GB. The increase in sizes from 2015 shows the introduction of SWARM chunk by chunk. SWARM reached it's full 4 chunk (8GHz) bandwidth in the second half of 2016. Since then file sizes have been regularly exceeding 100GB. The largest files are those with short scan times such as large maps covering a large number of pointings. Be aware of the size of your data and consider rebinning them using SMARechunker.

** Plots updated daily **

Archival sky coverage

The coverage of all data in the main science archive as of Septmeber 2019. This includes flux and baseline data, but not planets or moons.