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 » Surface reflectance - MODIS, LPDAAC MxD09 mosaic, Australia coverage

Surface reflectance - MODIS, LPDAAC MxD09 mosaic, Australia coverage

Last modified by Matt Paget on 2016/07/01 05:50

Surface reflectance - MODIS, LPDAAC MxD09 mosaic, Australia coverage

MOD09GA.2011.001.aust.005.b11.500m06200670nmrefl.gif

Link to the data

DescriptorData link
Persistent URLMOD09A1.005 http://www.auscover.org.au/purl/lpdaac-mosaic-mod09a1-v5
MOD09Q1.005 http://www.auscover.org.au/purl/lpdaac-mosaic-mod09q1-v5
MOD09GA.005 http://www.auscover.org.au/purl/lpdaac-mosaic-mod09ga-v5
MYD09A1.005 http://www.auscover.org.au/purl/lpdaac-mosaic-myd09a1-v5
MYD09Q1.005 http://www.auscover.org.au/purl/lpdaac-mosaic-myd09q1-v5
MYD09GA.005 http://www.auscover.org.au/purl/lpdaac-mosaic-myd09ga-v5
GeoNetwork recordhttp://www.auscover.org.au/geonetwork?uuid=54095cbd-88c6-466d-8bec-d7b97271899c
netCDF-CF (new) and HDF (old)http://www.auscover.org.au/thredds/catalog/auscover/lpdaac-csiro/c5/catalog.html
NCML aggregatesMOD09A1.005 http://www.auscover.org.au/thredds/auscover/lpdaac-aggregates/c5/v2-nc4/aust/MOD09A1.005/catalog.html
MOD09Q1.005 http://www.auscover.org.au/thredds/auscover/lpdaac-aggregates/c5/v2-nc4/aust/MOD09Q1.005/catalog.html
MOD09GA.005 http://www.auscover.org.au/thredds/auscover/lpdaac-aggregates/c5/v2-nc4/aust/MOD09GA.005/catalog.html
MYD09A1.005 http://www.auscover.org.au/thredds/auscover/lpdaac-aggregates/c5/v2-nc4/aust/MYD09A1.005/catalog.html
MYD09Q1.005 http://www.auscover.org.au/thredds/auscover/lpdaac-aggregates/c5/v2-nc4/aust/MYD09Q1.005/catalog.html
MYD09GA.005 http://www.auscover.org.au/thredds/auscover/lpdaac-aggregates/c5/v2-nc4/aust/MYD09GA.005/catalog.html

Data licence and Access rights

ItemDetail
RightsCopyright 2008-2012 CSIRO. Rights owned by the Commonwealth Scientific and Industrial Research Organisation (CSIRO). Rights licensed subject to Creative Commons Attribution (CC BY). Attribution for the LPDAAC as the source of the MODIS data is also required, see https://lpdaac.usgs.gov/citing_our_data.
LicenceCreative Commons Attribution 3.0 License, http://creativecommons.org/licenses/by/3.0.
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. Attribution for the LPDAAC as the source of the MODIS data is also required, see https://lpdaac.usgs.gov/citing_our_data. We ask that you send us citations and copies of publications arising from work that use these data.

Alternate title

Surface Reflectance Daily L2G and 8-Day L3 Global 250m, 1km and 500m

Abstract or Summary

The MODIS Surface Reflectance products provide an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption. Low-level data are corrected for atmospheric gases and aerosols, yielding a level-2 basis for several higher-order gridded level-2 (L2G) and level-3 products.

MxD09GQ provides Bands 1 and 2 at a 250-meter resolution in a daily gridded L2G product. MxD09GQ is meant to be used in conjunction with MxD09GA where important quality and viewing geometry information is stored. MxD09GA provides Bands 1-7 in a daily gridded L2G product, including 500-meter reflectance values and 1-kilometer observation and geolocation statistics. 

MxD09Q1 provides Bands 1 and 2 at 250-meter resolution in an 8-day gridded level-3 product. MxD09A1 provides Bands 1-7 at 500-meter resolution in an 8-day gridded level-3 product. Each MxD09Q1 and MxD09A1 pixel contain the best possible L2G observation during an 8-day period as selected on the basis of high observation coverage, low view angle, the absence of clouds or cloud shadow, and aerosol loading.

(Text from https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/mod09a1, .../mod09q1 and .../mod09ga).

Data are derived from the MODIS Land Products that are distributed by the LPDAAC as tiles from a global sinusoidal projection. Tiles for selected products for Australia have been downloaded and then mosaiced and remapped using the Modis Reprojection Tool (MRT). The products have been split into individual bands to reduce file size and have been reformatted to ensure consistency in SDS and attribute nomenclature.

Spatial and Temporal extents

ItemDetail
Spatial resolution (metres)250 m (MxD09Q1), 500 m (MxD09GA, MxD09A1) and 1000 m (MxD09GA)
Spatial coverage (degrees)110.0 to 155.0 E, -10.0 to -45.0 N
Temporal resolution1 day (MxD09GA) and 8 day (MxD09Q1, MxD09A1) composites
Temporal coverage2000-02-18 to ongoing (MOD09Q1, MOD09A1)
2000-02-24 to ongoing (MOD09GA)
2002-07-04 to ongoing (MYD09GA, MYD09Q1, MYD09A1)
Sensor & platformMODIS Terra (MOD09GA, MOD09Q1, MOD09A1) and Aqua (MYD09GA, MYD09Q1, MYD09A1)
ItemDetail
Spatial representation typegrid
Spatial reference systemWGS 84

Point of contact

ItemDetail
NameMatt Paget
OrganisationCSIRO Marine and Atmospheric Research
PositionRemote sensing scientist
Emailmatt.paget@csiro.au
Roleauthor
Address
Telephone
URL
ItemDetail
NameEdward King
OrganisationCSIRO Marine and Atmospheric Research
PositionRemote sensing scientist
Emailedward.king@csiro.au
Roleauthor
Address
Telephone
URL
ItemDetail
NameNASA Land Processes Distributed Active Archive Center (LP DAAC)
OrganisationUSGS/Earth Resources Observation and Science (EROS) Center
PositionSource data archive
Emaillpdaac@usgs.gov
RolepointOfContact
Address
Telephone
URLhttps://lpdaac.usgs.gov

Credit

CSIRO Marine and Atmospheric Research is the custodian of this dataset.

This dataset has been developed by the Time Series Remote Sensing Team, CSIRO Marine and Atmospheric Research.  The original data were supplied by the Land Processes Distributed Active Archive Center (LPDAAC), located at the U.S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) http://lpdaac.usgs.gov.

Keywords

ThesauriKeyword
GCMDEARTH SCIENCE > LAND SURFACE > SURFACE RADIATIVE PROPERTIES > REFLECTANCE
CFsurface_reflectance_where_land
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

LPDAAC are responsible for the actual data quality and provide quality channels as part of most products.  These channels are processed the same as the data channels.  The mosaicing, remapping and reformatting processes do not alter either the data or the quality fields.

Quality assessment of the LPDAAC MODIS products is undertaken by the MODIS Land Data Discipline Team, http://landweb.nascom.nasa.gov.

Data set specific link(s) for MxD09 products are:

Users should be aware that not all tiles for a particular mosaic necessarily become available from the LPDAAC on the same day.  It is therefore possible that the most recent mosaic for any given product will be updated over several days, each time containing progressively more actual data within the same (standard) geographic extent.

We have had some minor issues with file corruption that have been detected by users unable to un-gzip the mosaic files.  If you discover any such files, please report them to us (see contacts section).

Validation status

Quality assessment of the LPDAAC MODIS products is undertaken by the MODIS Land Data Discipline Team, http://landweb.nascom.nasa.gov.

Data set specific link(s) for MxD09 products are:

Related products

ItemProduct link

References

ItemDetail or link
PublicationPaget MJ and King EA (2008) MODIS Land data sets for the Australian region. CSIRO Marine and Atmpospheric Research Internal Report No. 004. Available from https://remote-sensing.nci.org.au/u39/public/html/modis/lpdaac-mosaics-cmar.
Readme text filehttps://remote-sensing.nci.org.au/u39/public/html/modis/lpdaac-mosaics-cmar/doc/MODIS_LandData_readme.txt
LPDAAC product pagehttps://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/mod09a1
https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/mod09q1
https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/mod09ga
https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/myd09a1
https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/myd09q1
https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/myd09ga
Validation reporthttp://landval.gsfc.nasa.gov/ProductStatus.php?ProductID=MOD09

Algorithm summary

The LPDAAC product pages, https://lpdaac.usgs.gov/products/modis_products_table/mod09a1, .../mod09q1, .../mod09ga, .../myd09a1, .../myd09q1 and .../myd09ga, provide links to the ATBDs and other supporting documentation.

Note that file format and structure mentioned on the LPDAAC site and supporting documents relates to the original HDF-EOS format for the sinusoidal projection tiles and global extent. Whereas the mosaic files available from this record are HDF4 format for a geographic latitude/longitude projection for Australian extent. The mask values and data types are consistent between both the tile and mosaic versions.

We refer the user to Paget and King (2008) for mosaic and reformatting details, and to the Readme text file for filename and directory structure information.

Product version history

Version labelDetail
1.0Initial release
2.0Added netCDF-CF format

The mosaic data set is automatically updated daily.  In practice this means that the archive is updated within a few days of new data being released on the LPDAAC data pool.  The documentation (papers and reports, and possibly this README file) will mostly reflect the state of the data set at the time of its initial release and may not be updated in synchrony with the data themselves.  As such, the files present on the server should be regarded as the definitive inventory of the data set.

Metadata history

DateDetail
2008-06Metadata creation date
2013-02-15Reformatted to new template.
Added Validation and LPDAAC references.
2016-06-30Updated links to data and LPDAAC information
Tags:
Created by Matt Paget on 2013/02/15 05:23

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