Processing SMA Data
1.2 m Telescopes
The Radio Telescope Data Center (RTDC) archives, and makes available data from the Submillimeter Array (SMA), the CfA Millimeter-wave Telescope, the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO). We also provide hardware, software tools, and necessary support for the analysis of radio interferometric data from the SMA, JVLA, VLBA, and ALMA.
RTDC machines give users access to all raw SMA science data since 2002, and flux and baseline data going back five years. We also maintain a public data archive containing all SMA data from which visitors can download non-proprietary raw datasets. A subset of calibrated and imaged science data is also available.
The CfA Millimeter-wave telescope archive includes the CO (1-0) spectra from the whole-Galaxy survey presented in Dame, Hartmann & Thaddeus (2001), v-l-b FITS cubes for each survey listed in Table 1 of that paper, plus larger composite cubes and integrated maps.
Learn more about what the RTDC can offer
19 Mar Want to run a VNC session on the RTDC computers? Visit this page for directions.
17 Mar Due to Covid-19, the SMA has suspended operations for 2 weeks.
19 Feb If you want to learn more about interferometry, see the presentations from this years SMA Interferometry School here.
12 Feb rglinux13 has doubled its memeory to 96GB. Its raid array is performing optimally.
21 Jan rtdc9 is experiencing problems. This will affect data retrieval from the SMA archive. Watch this space for updates. FIXED.
9 Nov Over the weekend we have seen a delay in getting new SMA data into the archive. This is due to network issues in Hilo and is being resolved.
2 Oct The public SMA archive has a new look. You can now find supplemental plots showing environmental information, have the ability hide/show columns, and search for multiple sources or sets of coordinates.
2 Oct CASA 5.6.1 is available on RTDC computers. This is now aliased to
12 Aug CASA 5.6.0 is available on RTDC computers. This is now aliased to
10 Jul The SMA discovered a software error affecting Doppler tracking during science observations from 2011 April 4 to 2019 April 3. This error has a negligible effect on observations of continuum and broad spectral line, but narrow line observations are affected by a blurring of up to 0.8 km/s. There is a task in MIR for correcting this - find details here.
18 May Access to the SMA archive internally through /sma/data/ is disabled while disks are reconfigured. Update: Access restored May 20.
9 May DS9 has been updated to version 8.0.
30 Mar The archive now reports the receiver station (A or B) for each LO tuning. This had been potentially confusing when both receivers were tuned to the same LO frequency.
28 Feb SMA PIs now get direct access to their data from the public and proprietary archives through new links in SMA observing reports (accessed through the SMAOC).
26 Feb The proprietary archive results now list the sources included in each data file.
26 Feb If you search by project code in the public archive, you will now find the results listed per data file rather than by source.
19 Feb Follwing a bug fix CASA has been updated to 5.4.1-32. This is the version to use for the VLA pipeline. For the ALMA pipeline, version 5.4.0-70 has also been patched.
12 Feb Warning: A bug has been found in SMARechunker. If a range of channels is selected the central velocity of the band is not properly recalculated. Check back here or at Reducing the Size of your Data for updates.
4 Feb The antenna positions files required for correcting baselines are now publicly available for proprietary, (as well as non-proprietary), data. See Updating SMA Baselines.
7 Jan The SMA archive results list now includes the offset (in arsecs) between your search coordinates and the target coordinates of the returned observation. This only applies to a coordinates + radius search.
7 Jan CASA 5.4.1 is available on RTDC computers. This is now aliased to
Happy New Year - 2019
12 Nov We are having problems with rtdc9. Users cannot currently log on. This is being worked on. Update (13/11): Fixed.
30 Oct The RTDC machines are now linked by a 10GB switch. This will speed up data transfer and make it faster to work on data stored on mounted disks. See a list of where to find mounted disks at Disk names and mount points.
18 Oct CASA 5.4.0 is available on the RTDC machines. See a full list of available versions of CASA here.
17 Sep Version 11.5 of the VLBA/VLBI scheduling software SCHED is now available on the RTDC.
14 Sep You can now search for polarimetry data via the new 'Polarization state' flag in the SMA archive. Be aware polarization data requires extra calibration steps. Email email@example.com for assistance.
27 Aug The 31DEC18 version of AIPS is now available on rtdc7, rglinux12 and rglinux13. 31DEC16 remains the default on rglinux10.
1 Aug See the results of testing parallelized tclean with CASA 5.3.0. There are some differences to the final map depending on the number of cores used, but on small scales the effect is mostly marginal.
11 Jul You can now search by a specific frequency in the SMA data archive.
3 Jul RADEX is available on RTDC machines.
11 Jun CASA 5.3.0 is available on RTDC computers. This is now aliased to
5 Jun The SMA archives are now up to date.
4 Jun Network issues in Hilo has meant that recent SMA data has not been transferred to the RTDC. This affects the web-based archives as well as internal users. It will be posted here when the data becomes available.
10 May The virtual machines smadr1 and smadr2 have been renamed rglinux12vm and rtdc8vm. Visit RTDC Computers for more information.
8 May You can now search the SMA archive by project code, and the columns can be sorted.
8 May SMA data archive is up to date.
7 May The weekend shutdown means the SMA archive is not currently up to date. Copying will begin once the Hilo machines recover from the earthquake power glitches.
7 May The RTDC is back online.
4 May RTDC computers are offline for scheduled power outage.
22 Apr Many disk names, both local and exported, have changed. Find out if your disk is affected at Disk names and mount points
22 Apr RTDC computers are back online. Power outage was postponed, so expect alternative weekend disruption.
20 Apr RTDC computers will be switched off at 3pm for scheduled power outages.
06 Apr Probable disk failure on rglinux11. Machine is unusable for the moment. UPDATE: disk repaired for now but is not considered reliable. Remember to back-up important data!
08 Mar Unsure which machine is available? You can check the current status of the RTDC computers here. This information is updated every 15 minutes.
05 Mar See the new instructions for importing uvfits files from MIR directly into CASA at Converting SMA data to CASA MS format.
01 Mar RTDC computers back online.
28 Feb The RTDC computers will be offline again tonight due to scheduled power outages.
28 Feb The SMA science archive now accepts multiple sets of coordinates in a single search. Provide these in the 'RA Dec' selection box as a | separated list.
27 Feb A new coordinates search option in the SMA Science Archive makes it easier to input coordinates.
25 Feb RTDC computers back online as of 8pm.
23 Feb RTDC computers shut-down for electrical work in 160 Concord.
23 Feb The color printers psc342 and psc339 are now available from all RTDC machines.
22 Feb OpenOffice can be started from the command line by typing
8 Feb The Karma package is available on RTDC machines. This can be used to make spectra, take 2 and 3D slices, display contours, and analyze expanding shells.
7 Feb The SMA call for proposals for the 2018A semester is open. Find details here.
5 Feb CASA 5.1.2 is available on RTDC computers. This is now aliased to
5 Feb Updates to the web pages are happening today. Expect links to change. UPDATE: Changes are complete.
29 Jan IDL 8.3 is now the default on RTDC machines. You can still access 6.2 by typing
29 Jan See our expanded SMA data FAQ page. Topics include the archive, data format, and data reduction.
26 Jan WIP is now working and exported to all RTDC machines.
17 Jan Miriad-SMA-WB5.0.7 is now available on RTDC machines. In addition to fixes for several data files, the ephemeris tables are updated for solar system objects.
15 Jan AIPS users are reminded to use rglinux10. Please report any issues.
Happy New Year - 2018
4 Dec Miriad-SMA-WB5.0.6 is available on RTDC machines. This is the default when you source /home/miriad/miriad_WB/automiriad.csh. For pre-'4 chunk SWARM' data check here.
30 Nov There is a new script to convert SMA data from MIR/IDL to UVFITS. Find out more at our updated instructions for opening SMA data with CASA.
19 Oct Unsure which RTDC machine to use for data reduction? See Which machine should I use? for help.
16 Oct A new version of Miriad (Miriad-SMA-WB5.0.5) is available. Known data issues are fixed, and a feature to record the information of mapping the frequency configurations between raw SMA data and Miriad is also implemented.
29 Sep If the baseline solutions need updating, you will now find the correct antenna file provided along with the raw data in the science archive.
29 Sep We bid farewell to our friend and colleague Shoshana Rosenthal who retires this week. We wish her all the best for the future.
19 Sep Proprietary SMA data can now be accessed through our new Proprietary Archive. Available only to PIs or authorized users. You can also request your data be rebinned. More information can be found in the instructions.
14 Sep CASA 5.1.0 is available. Find it here: /opt/casa-release-5.1.0-71.el6/bin/casa.
5 Sep Use our new tool to easily perform unit conversions between frequency, wavelength and spectral resolution.
23 Aug Looking for an easier way to view/filter catalog data? Try TOPCAT (Tool for OPerations on Catalogues And Tables). Available on RTDC machines.
10 Aug The SMA call for proposals is now open. Visit the SMA Observer Center for full details.
4 Aug SMA science data is now at a new location. We are no longer archiving historical non-science data. See here for details.
20 Jul CASA 5.0.0 is installed. Find it here: /opt/casa-release-5.0.0-218.el6/bin/casa. Make sure you are not running CASA on a mounted disk - this will slow it down considerably.
19 Jul When you request SMA data through the Query Form, all sources contained in the raw data will now be listed.
3 Jul Got questions about SMA data? Check out our new FAQ page.
27 Jun CASA 4.7.2 is installed. Find it here: /opt/casa-release-4.7.2-el6/bin/casa.
21 Jun See our updated instructions for converting SMA data to CASA MS format.
14 Jun Summer students - new to Linux or want some new tricks? See our Linux tips page for a list of the most useful commands.
12 Jun For RTDC users: an additional machine, rglinux8 (formerly mayet), is up and running in M-342.
1 Jun A new archive is available here to search for calibration data (pointing/flux/baseline). External users will still have to visit the main Query Form to request the data for download.
12 May For non-proprietary data (since 2007) you can view the observing report from the Query Form results list.
19 Apr Archive search results now report the type of data that are available (raw, calibrated or imaged).
10 Apr Priming data has been removed from the archive.
2 Apr The RTDC computer list is now up to date.
20 Mar All non-proprietary data is available for download from the SMA archive.
14 Mar PI data now binned by a factor of 4 by default. This can be overridden if necessary by clicking a 'Full res.' checkbox on the PI request page.
8 Mar CASA 4.7.1 installed. Find it here: /opt/casa-release-4.7.1-el6/bin/casa
19 Feb Calibrated data is no longer offered as an option to PIs.
19 Feb News-feed is added to the RTDC homepage. (2017)