TemperateReefBase Geonetwork Catalogue
Trace-gas profiles of the boundary layer from Multi-Axis Differential Optical Spectroscopy MAX-DOAS collected during the SIPEX II voyage of the Aurora Australis, 2012
The current data set contains spectral atmospheric measurements from:
- Multi-Angle Differential Optical Absorption Spectrometer (MAX-DOAS) - built in-house at NIWA Lauder by Dr Karin Kreher, Mr Paul Johnston and Mr Alan Thomas.
Instrument description and setup details:
MAX-DOAS
Instrument Description:
The MAX-DOAS instrument consists of a Czerny-Turner type ISA HR320 flat-field spectrograph with a focal length of 320 mm and an aperture ratio of F/4. The array detector is a Hamamatsu C7042 detector head with S7032-1007 sensor chip. The chip is back-thinned, allowing light to enter from the rear of the silicon substrate, which substantially increases the quantum efficiency over the whole spectral range, especially in the UV region (less than 400 nm). The sensitivity in the UV is important in order to obtain a good signal-to-noise ratio for BrO measurements. The detector signal is then passed to the computer via a 16-bit analogue to digital converter card. The detector is cooled to -20oC using a Peltier cooler to minimise the dark current noise caused by thermally excited electrons. The entrance optics consisted of an angled telescope mirror that reflects the measured light down through a focusing lens onto the entrance of a quartz fibre optic bundle leading into the spectrograph. The field of view of the telescope is ~0.5o. A webcam, also housed close to the entrance optics, records images of the sky in the spectrometer viewing direction at one minute intervals. These images are included in the dataset.
Instrument Setup:
The spectrometer was scanning wavelength regions in the UV-Vis region with a variable resolution spread over the pixel array CCD. Spectra were taken at multiple viewing angles (1,2,3,4,6,8,15,30,90o) in the open water and (-5,1,2,4,6,8,15,30,90o) in the ice (5th October - left ice) above the horizon. 90o is used as the reference viewing angle.
Scattered sunlight was fed into the spectrometer using an optical fibre whose input was placed at the focal point of a lens receiving light from the rotating mirror which was setup to automatically adjust for the roll of the ship to maintain its viewing angle.
The data is processed using 2 wavelength fitting regions as follows: M region: 323-348 nm in the UV retrieving: XS1=NO2 x 1e16, XS2=O3 x 1e19, XS6=O4x1e42, XS7=BrOx1e14, XS11 HCHOx1e16, XS12=slope O3 (to improve fit of O3 due to air mass changes with wavelength). And S region (visible) 416-443 nm, retrieving XS1=NO2 x 1e16, XS6=H2O x 1e22, XS7=O4x1e42, XS11=IOx1e14
The entrance optics of the tracker were cleaned daily using kimwipes.
The dataset contains the following files:
- FPS files, which are binary files generated by in-house software written by The National Institute of Water and Atmosphere (NIWA).
- A MAX-DOAS log file, in text format
- A MAX-DOAS error file, in text format
- A configuration file, in text format
Simple
Identification info
- Alternate title
- Trace-gas profiles of the boundary layer from Multi-Axis Differential Optical Spectroscopy MAX-DOAS collected during the SIPEX II voyage of the Aurora Australis, 2012
- Date (Publication)
- 2014-09-01
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.4225/15/53266BD1D37E6
Originator
Publisher
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Collaborator
Collaborator
Collaborator
Collaborator
Collaborator
- Name
- CAASM Metadata
- Status
- Completed
Custodian
- Topic category
-
- Oceans
Extent
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 2012-09-14 2012-11-05
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES
- Keywords
-
- MAX-DOAS
- NASA/GCMD Earth Science Keywords
-
- Spectrometers
- DOAS > Differential Optical Absorption Spectrometers
- NASA/GCMD Earth Science Keywords
-
- R/V AA > R/V Aurora Australis
- NASA/GCMD Earth Science Keywords
-
- AMD
- AMD/AU
- CEOS
- ACE/CRC
- NASA/GCMD Earth Science Keywords
-
- OCEAN > SOUTHERN OCEAN
- CONTINENT > ANTARCTICA
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- These data are not yet publicly available.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SIPEX_II_MAX-DOAS when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Fees
- Free
- Planned available datetime
- 2014-09-01T00:00:00
- Units of distribution
- MB
- Transfer size
- 610
- Distribution format
-
- Images, Text, Binary
- OnLine resource
-
GET DATA
Download point for the data
- OnLine resource
-
PROJECT HOME PAGE
Public information for ASAC project 4032
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset
Resource lineage
- Statement
- MAX-DOAS mirror angle function not functioning properly on 16 and 17 September until 1010 UT The controlling computer froze a number of times throughout the voyage which caused a few hours of data loss. See log for details.
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2013-05-17 - record created by Dave Connell from a template completed by Robyn Schofield. 2014-03-17 - record updated by Dave Connell to add a data set DOI.
Metadata
- Metadata identifier
- string/SIPEX_II_MAX-DOAS
- Language
- English
- Character encoding
- UTF8
Sponsor
Owner
- Title
- Parent Metadata Record
- Citation identifier
- SIPEX_II
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 65b47d28-3daf-423c-938a-657531c6b7ef
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2015-11-30T07:47:56
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/SIPEX_II_MAX-DOAS
Point of truth for the metadata record
- Date info (Creation)
- 2013-05-17T00:00:00
- Date info (Last Update)
- 2017-04-26
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile
Overviews
Spatial extent
Provided by
