Scheduled maintenance: 8-10 am ACT/NSW each Wednesday. Expect shutdowns and restarts.

Contact us: data at auscover.org.au  |  Disclaimer: Please read
Product pages » Hyperspectral Ground Calibration Data

Hyperspectral Ground Calibration Data

Last modified by Bec Trevithick on 2017/01/10 16:13

Hyperspectral ground calibration data - spectroradiometer, reflectance, radiance, irradiance, raw, AusCover supersites

calibrationexample2.JPG

Figure 1: Hyperspectral ground calibration data collection at Robson's Creek, Queensland.

Link to the data

This data set consists of raw instrument files and a supporting shapefile/KMZ file of ancillary data regarding the product. Information on the filenaming convention for the instrument files and the details of the attribute fields for the shapefile/KMZ file are located in this document in the sections titled 'Instrument data naming convention' and 'Shapefile/KMZ file attributes' respectively.

DescriptorData linkLayer name
Persistent URLhttp://www.auscover.org.au/purl/hyperspectral-ground-calibration-all-sites
GeoNetwork recordNot Available Yet
Instrument filesftp://qld.auscover.org.au/airborne_validation/ground_calibration/hyperspectral_ground_targets/
Data Portal (in development)http://qld.auscover.org.au/public/html/field/index.html

Data licence and Access rights

ItemDetail
RightsCopyright 2010-2020 JRSRP. Rights owned by the Joint Remote Sensing Research Program. Rights licensed subject to Creative Commons Attribution (CC BY).
LicenceCreative Commons Attribution 4.0 License, http://creativecommons.org/licenses/by/4.0
AccessThese data can be freely downloaded and used subject to the CC BY licence. Attribution and citation is required as described at http://www.auscover.org.au/citation. We ask that you send us citations and copies of publications arising from work that use these data.

Abstract or Summary

Field spectroradiometer measurements are collected to relate field based measurements to satellite data products (e.g. Landsat and MODIS NBAR products).  For calibration and validation of at-surface reflectance of airborne hyper-spectral image data. Once the at-surface reflectance values of the hyper-spectral image data have been validated, the data can be used for up-scaling to medium spatial resolution Landsat and MODIS data for cal/val of NBAR products.

Spatial and Temporal extents

ItemDetail
Typical spatial resolution (metres)10 m
Spatial coverage (degrees)110.000000 to 155.001329 E, -10.000000 to -45.000512 N
Temporal resolution1 day
Temporal coverage2011-04-07 to ongoing
Sensor(s)spectroradiameter
ItemDetail
Spatial representation typevector
Spatial reference systemWGS 84

Point of contact

ItemDetail
NameRebecca Trevithick
OrganisationRemote Sensing Centre - Queensland Department of Science, Information Technology and Innovation
PositionSenior Scientist (Remote Sensing)
Emailrebecca.trevithick@qld.gov.au
RolepointOfContact
AddressRemote Sensing Centre, DSITI, EcoSciences Precinct
Telephone(07) 3170 5679

Credit

The Joint Remote Sensing Research Project was primarily responsible for the curation of this data set, however the following organisations contributed to the data collection:

  • Joint Remote Sensing Research Project
  • Royal Melbourne Institute of Technology
  • Curtin University
  • University of Adelaide
  • CSIRO

Keywords

ThesauriKeyword
GCMDEARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
CFvegetation_area_fraction
FoREnvironmental Sciences > Ecological Applications = 0501

There are three main thesauri that AusCover recommends:

  1. Global Change Master Directory (http://gcmd.nasa.gov)
  2. Climate and Forecast (CF) convention standard names (http://cfconventions.org/standard-names.html).
  3. Fields of Research codes (http://www.abs.gov.au/ausstats/abs@.nsf/0/6BB427AB9696C225CA2574180004463E?opendocument).

Data quality

The accuracy of the geographic location of the targets varies between sites, depending on how the coordinates were collected. Other site specific issues relating to data quality may exist. Please see the ancillary data shapefile or KMZ file for specific details. 

Validation status

This is a validation data set. No validation is intended for this data set.

Related products

ItemProduct link
Airborne HyperspectralAirborne Hyperspectral
Microtops Aerosol Optical DepthMicrotops Aerosol Optical Depth
Microtops OzoneMicrotops Ozone

References

ItemDetail or link
Online infoAusCover field calibration/validation home page
Online infoField data collection protocol: Calibration Targets
Online infoField data collection protocol: Ground Features

Sampling strategy

Data is typically collected from standardised calibration targets (white, grey and black) laid out in an open area within or nearby the site. Data is collected in a zig zag pattern of points over the target at approximately 1 m intervals. Natural features (roads, soils, grass, irradiance) are also collected opportunistically. Full details of the field data collection are outlined in the field data protocol contained in the references of this document. Deviations from this strategy are outlined in the associated shapefile/KMZ file for this data set.

Product version history

Version labelDetail
1.0Initial release

Instrument data naming convention

Filenames for instrument data conforms to the AusCover naming convention. Full details of this convention are obtainable at: [[AusCover Filenaming>>Field Sites.AusCover Filenaming Convention

The standard form of this convention is:

<sensor category code><instument code><product code>_<longitude>e<latitude>s_<yyyymmdd>_<processing stage code>_<additional dataset specific tags>

The following table describes the meaning of the unique codes used for this product.

Data Naming ElementPossible Code(s)Descriptor
Standard Elements

     
sensor categorysispectroradiometer instrument
instrumenta1ASD - fieldspec full range
productre     
ir
rw
rd
reflectance
irradiance
raw
radiance
processing stageaa0raw instrument data
projectiong0Geographic Coordinates, in latitudes and longitudes  
Data Specific Elements

targettacwht
tacblk
tacgry
tirrad
tirshd
tspect
tgrass
tgravl
tsoils
tveget
troads
tother
auscover standard white target
auscover standard black target
auscover standard grey target
irradiance
shaded irradiance
spectralon panel
grass
gravel
soil (see shapefile/KMZ file for details of colour etc)
vegetation (see shapefile/KMZ file for details)road/track includes ashphalt areas (see shapefile/KMZ file for specific details)
other unspecified (see shapefile/KMZ file for details)
instrument serial numberi<integer>serial number

Shapefile/KMZ file attributes

The information in the following table consist of metadata relating to the attribute fields in both the shapefile and KMZ file relating to this product.

Data FieldDescription (units)Format
supersiteAusCover calibration/validation siteText
dateDate of observations (yyyymmdd)Text
longitudeLongitude of target location. Typically refers to plot centre. Method of determination various, see comments for details (decimal degrees)Float
latitudeLongitude of target location. Typically refers to plot centre. Method of determination various, see comments for details (decimal degrees)Float
observersNames of field observersText
samplesNumber of spectrometer samples taken of targetInteger
makeMake of spectrometerText
modelModel of spectrometerText
serial_noSerial number of spectrometerInteger
foreopticCategorical field of foreoptic used ()Text
fo_jumperCategorical field of FO jumper usedText
modeCategorical field for mode (raw/white)Text
measurement_typeCategorical descriptor of measurement type (reflectance, radiance, irradiance)Text
instrument_ownerOrganisation instrument belongs toText
filenameRoot filename for raw instrument files located on THREDDSText
obs_keyUnique identifier of site and visit for data management purposesText

Metadata history

DateDetail
2013-03-13Metadata creation date
Tags:
Created by Bec Trevithick on 2013/03/14 11:44

This wiki is licensed under a Creative Commons 2.0 license
XWiki Enterprise 4.5.3 - Documentation