CARTA (Cube Analysis and Rendering Tool for Astronomy) - PowerPoint PPT Presentation

CARTA (Cube Analysis and Rendering Tool for Astronomy) Developments, features, and demo Kuo-Song Wang on behalf of the CARTA team 
 EA ALMA/45m/ASTE Users Meeting 2018 2018/12/26 @ NAOJ

The mission of CARTA • CARTA is the Cube Analysis and Rendering Tool for Astronomy, a new image visualization and analysis tool designed for the ALMA, the VLA, and the SKA pathfinders. • As the image size increases drastically with modern telescopes in recent years, viewing an image with a local image viewer or with a remote image viewer via the ssh protocol becomes less e ffi cient. • The mission of CARTA is to provide usability and scalability for the future by utilizing modern web technologies and computing parallelization.

As of ALMA cycle 6 band 3 4 5 6 7 8 9 10 100 150 185 230 345 460 650 870 rep. frequency (GHz) 52 34 28 22 15 11 8 6 12m single pointing FOV (arcsec) 0.042 0.028 0.0227 0.0183 0.0278 0.0459 0.0325 0.0243 best beam size (arcsec) C43-10 C43-10 C43-10 C43-10 C43-8 C43-7 C43-7 C43-7 __at which configuration 12381 
 12143 
 12335 
 12022 
 5396 
 2397 
 2462 
 2469 
 approx. max. single pointing image size (pixel) assuming 5 px px px px px px px px pixel per beam and double FOV 2.25 
 2.16 
 2.23 
 2.12 
 426 
 84 
 89 
 89 
 approx. file size per 3840-channel TB TB TB TB GB GB GB GB single 150-pt square mosaic: 330 220 180 145 95 72 51 38 image size (arcsec) 39286 
 39286 
 39648 
 39617 
 17086 
 7843 
 7846 
 7819 
 single 150-pt square mosaic: image size (pixel) px px px px px px px px 22.61 
 22.61 
 23.03 
 22.99 
 4.28 
 901 
 902 
 896 
 single 150-pt square mosaic: file size per 3840-channel (GB) TB TB TB TB TB GB GB GB __note: with best angular resolution, 150-pt mosaic observation may not be realistic due to too long integration time.

Client-Server architecture

via https://www.newequipment.com/industry-trends/how-avoid-bummer-vacation

CARTA development • The development of the CARTA project is a joint e ff ort from (in alphabetical order) • Academia Sinica, Institute of Astronomy and Astrophysics (ASIAA) 
 <server side, test, CI/CD> • Inter-university Institute for Data Intensive Astronomy (IDIA) 
 <client side> • National Radio Astronomy Observatory (NRAO) 
 <server side> • Department of Physics, University of Alberta 
 <test>

CARTA release • Initial release v1.0: December 21, 2018 • O ffi cial release announcement coming very soon • Desktop release only with “local” and “remote” versions • Server release in v1.1: Q1 2019 • Download and follow the instructions via the homepage • Online user manual 


CARTA features • Good performance to view moderate-size images (few kpx) with commercial laptop or desktop • Basic image viewing capability • Basic per-channel and per-cube histogram • Basic spatial and spectral profile viewing capability • Basic animation capability • Export as png or tsv text file.

Demo (SSD)

Performance of loading images SWAP in use Quadratic relationship 67 MB 268 MB 1.1 GB 4.3 GB

Future plan and major goals • Version 1.0: current release, including basic image and profile viewing capability. • Version 1.1: basic region of interest (ROI) support and relevant analysis tools (statistics, histogram, and profilers). • Version 1.2: WCS group support which allows multiple images to be aligned in spatial and spectral domains. • Next version: multiple-panel view • Next version: moments image, position-velocity image, and scripting interface • Next version: interactive clean • Next version: collaborative mode • Next version: misc.

Send us feedback and questions, please~ carta_helpdesk@asiaa.sinica.edu.tw