Snodar: 2009 performance at Dome A, Antarctica

Colin S. Bonner, Michael C B Ashley, Stuart G. Bradley, Xiangqun Cui, LongLong Feng, Xuefei Gong, Jon S. Lawrence, Daniel M. Luong-Van, Zhaohui Shang, John W V Storey, Lifan Wang, Huigen Yang, Ji Yang, Xu Zhou, Zhenxi Zhu

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

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Snodar is a high resolution acoustic radar designed specifically for profiling the atmospheric boundary layer on the high Antarctic plateau. Snodar profiles the atmospheric temperature structure function constant to a vertical resolution of 1 m or better with a minimum sample height of 8 m. The maximum sampling height is dependent on atmospheric conditions but is typically at least 100 m. Snodar uses a unique in-situ intensity calibration method that allows the instrument to be autonomously recalibrated throughout the year. The instrument is initially intensity calibrated against tower-mounted differential microthermal sensors. A calibration sphere is located in the near-field of the antenna to provide a fixed echo of known intensity, allowing the instrument to be continuously re-calibrated once deployed. This allows snow accumulation, transducer wear and system changes due to temperature to be monitored. Year-round power and communications are provided by the PLATO facility. This allows processed data to be downloaded every 6 hours while raw data is stored on-site for collection the following summer. Over 4 million processed samples have been downloaded through PLATO to date. We present signal attenuation from accumulation of snow and ice on Snodar's parabolic reflector during the 2009 at Dome A.

Original languageEnglish
Title of host publicationGround-Based and Airborne Telescopes III
EditorsLarry M. Stepp, Roberto Gilmozzi, Helen J. Hall
Place of PublicationBellingham, WA
Number of pages6
Volume7733, Part One of Three Parts
ISBN (Print)9780819482235
Publication statusPublished - Jul 2010
EventGround-Based and Airborne Telescopes III - San Diego, CA, United States
Duration: 27 Jun 20102 Jul 2010


OtherGround-Based and Airborne Telescopes III
Country/TerritoryUnited States
CitySan Diego, CA

Bibliographical note

Copyright 2010 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


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