Advanced Land Observing Satellite (ALOS) Phased Array type-L band Synthetic Aperture Radar (PALSAR) UK imagery
Observation graphic
Dataset
Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2014-08-18
DOI Publication Date: No DOI
 
Abstract

Level 1 Advanced Land Observing Satellite (ALOS) Phased Array type-L band Synthetic Aperture Radar (PALSAR) data were acquired from ESA by the Landmap project and processed to produce greyscale 8 and 32-bit geotiff imagery for the UK and Republic of Ireland from 2007-2009. The UK data are projected onto the British National Grid whereas the Republic of Ireland data are projected onto the Irish National Grid. PALSAR is an active microwave sensor using L-band (2GHz) frequency and produces various products of different resolutions and performance. PALSAR data can be acquired during day or night, increasing the temporal coverage of data for a particular spatial extent. PALSAR is also unaffected by cloud cover allowing a better coverage of satellite data.
PALSAR collects data in 4 different modes. The Joint Information Systems Committee (JISC) funded Landmap service which ran from 2001 to July 2014 collected and hosted a large amount of earth observation data for the majority of the UK. After removal of JISC funding in 2013, the Landmap service is no longer operational, with the data now held at the NEODC.

When using these data please also add the following copyright statement: © ESA 2004/2005/2006/2007/2008…. Received and Distributed by University of Manchester under licence from the European Space Agency

Citable as:  Landmap; European Space Agency (2014): Advanced Land Observing Satellite (ALOS) Phased Array type-L band Synthetic Aperture Radar (PALSAR) UK imagery. NERC Earth Observation Data Centre, date of citation. http://catalogue.ceda.ac.uk/uuid/e6e8b3853eed7eeceedf347737643414
Keywords:  Not defined
In support of:
Dataset is part of:
Previous Info:
No news update for this record
Previously used record identifiers:
http://badc.nerc.ac.uk/view/neodc.nerc.ac.uk__ATOM__ACTIVITY_a7934404-27a6-11e4-b07f-00163e251233
Access rules:
Restricted data: please submit an application using the "REQUEST ACCESS" link for access.
Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/landmap.pdf. When using these data you must cite them correctly using the citation given on this record.
Abbreviation:
Not defined
Data lineage:

Data collected and prepared by the Landmap team before a copy of the data were obtained by NEODC directly from Landmap.

File Format:
Data availability and file format

The data are available in geotiff format which can be opened in many earth observation image processing software including open/free software such as Erdas ER viewer and the freely available Basic ERS & Envisat (A)ATSR and Meris Toolbox (BEAM) or NEST (Next ESA SAR Toolbox). Geotiff files are TIFF files which have geographic metadata embedded as tags within the TIFF file. The geographic metadata can then be used to position the image in the correct location and geometry on the screen of a geographic information display. The data are split into the three modes acquired by Landmap (Fine Beam Single (FBS), Fine Beam Dual (FBD) and Polarimetric). The various polarisations can be determined from the filename:

  • HH - Horizontal polarisation transmitted, horizontal received.
  • VV - Vertical transmitted, vertical received
  • HV - Horizontal transmitted, vertical received
  • VH - Vertical transmitted, horizontal received
Specific products include 32 bit _geo GeoTiff, and 8 bit _geo_lia and _geo_ls_mask GeoTiffs. All the geotiff images are provided with GeoTiff World Files (.tfw) which are used to geo-reference images to an appropriate projection scheme.

More Information (under review)

Introduction

Level 1 Advanced Land Observing Satellite (ALOS) Phased Array type-L band Synthetic Aperture Radar (PALSAR) data were acquired from ESA by the Landmap project and processed to produce greyscale 8 and 32-bit geotiff imagery for the UK and Republic of Ireland from 2007-2009. The UK data are projected onto the British National Grid whereas the Republic of Ireland data are projected onto the Irish National Grid.

PALSAR is an active microwave sensor using L-band (2GHz) frequency and produces various products of different resolutions and performance. PALSAR data can be acquired during day or night, increasing the temporal coverage of data for a particular spatial extent. PALSAR is also unaffected by cloud cover allowing a better coverage of satellite data. PALSAR collects data in 4 different modes, with the following 3 available:

  • Fine Beam Single (FBS) Mode: High resolution fine beam data that only acquires one polarisation product (horizontal transmit, horizontal receive (HH))
  • Fine Beam Dual (FBD) Mode: High resolution fine beam data that acquires two types of polarisation products (horizontal transmit, horizontal receive (HH) and horizontal transmit, vertical receive (HV); or vertical transmit, vertical receive (VV) and vertical transmit, horizontal receive (VH))
  • Polarimetric: Polarimetric data acquires all polarisation products (HH, HV, VH, and VV), however it does have a lower resolution than the fine beam modes.
FBS data is available for the majority of England and Scotland west of central London and east of Glasgow respectively, FBD for the majority of Scotland, Ireland, Wales and South-west England and Polarimetric for the majority of Scotland, Ireland, Wales and England west of central London.

The Joint Information Systems Committee (JISC) funded Landmap service which ran from 2001 to July 2014 collected and hosted a large amount of earth observation data for the majority of the UK. After removal of JISC funding in 2013, the Landmap service is no longer operational, with the data now held at the NEODC.


Restricted Data Access

The PALSAR data are available to UK academics and students. To apply for access, please

  1. Register as a NEODC user. If you already are a NEODC registered user, skip this step. If you have forgotten your NEODC user ID and/or password, please contact the NEODC helpdesk at neodc@rl.ac.uk.
  2. Apply for access to the Landmap data. Application involves the agreement with the Landmap terms of use.


Data availability and file format

The data are available in geotiff format which can be opened in many earth observation image processing software including open/free software such as Erdas ER viewer and the freely available Basic ERS & Envisat (A)ATSR and Meris Toolbox (BEAM) or NEST (Next ESA SAR Toolbox). Geotiff files are TIFF files which have geographic metadata embedded as tags within the TIFF file. The geographic metadata can then be used to position the image in the correct location and geometry on the screen of a geographic information display. The data are split into the three modes acquired by Landmap (Fine Beam Single (FBS), Fine Beam Dual (FBD) and Polarimetric). The various polarisations can be determined from the filename:

  • HH - Horizontal polarisation transmitted, horizontal received.
  • VV - Vertical transmitted, vertical received
  • HV - Horizontal transmitted, vertical received
  • VH - Vertical transmitted, horizontal received
Specific products include 32 bit _geo GeoTiff, and 8 bit _geo_lia and _geo_ls_mask GeoTiffs. All the geotiff images are provided with GeoTiff World Files (.tfw) which are used to geo-reference images to an appropriate projection scheme.


Software

Erdas ER viewer, available free of charge, can be used to open raster image formats such as TIFF, GeoTiff, IMG, ECW, ERS, ALG, DAT and many more, and is capable of handling large file sizes.

Basic ERS & Envisat (A) ATSR and Meris Toolbox (BEAM): BEAM is an open-source toolbox and development platform for viewing, analysing and processing of remote sensing raster data. Originally developed to facilitate the utilisation of image data from Envisat's optical instruments, BEAM now supports a growing number of other raster data formats such as GeoTIFF and NetCDF as well as data formats of other Earth Observation (EO) sensors such as Moderate Resolution Imaging Spectroradiometer (MODIS), Advanced Very High Resolution Radiometer (AVHRR), AVNIR, Polarised Radiation Imaging and Spectroscopy Mission (PRISM) and Compact High Resolution Imaging Spectrometer (CHRIS). Various data and algorithms are supported by dedicated extension plug-ins.

NEST (Next ESA SAR Toolbox) is an ESA open source toolbox under the GNU GPL license for reading, processing, analysing and visualising ESA (ERS-1/2, ENVISAT, SENTINEL-1) and other spaceborne SAR data (TerraSAR-X, RADARSAT 1-2, COSMO-SkyMed, JERS-1, ALOS PALSAR) processed to Level-1 or higher.

Links to further information

  • The Landmap project PALSAR website, this site may be offline soon after 1st August 2014 due to removal of JISC (Joint Information Systems Committee) funding, see below for an archived version of ths site
  • An archived version of the site, hosted by the Internet Archive project
  • The ESA PALSAR website
  • Japan Aerospace Exploration Agency (JAXA) website on ALOS PALSAR
  • Information on ALOS PALSAR products


Who to contact

If you have queries about these pages or about obtaining the PALSAR data from the NEODC then you should contact the NEODC Support team. Your query should be answered within one working day. When follow-up work is required, the NEODC support team will carry out the work as quickly and efficiently as possible.

Process overview
This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Output Description
None

Computation Element: 1

Title
DETAILS NEEDED - COMPUTATION CREATED FOR SATELLITE COMPOSITE. deployed on Advanced Land Observing Satellite (ALOS)
Abstract
This computation involved: DETAILS NEEDED - COMPUTATION CREATED FOR SATELLITE COMPOSITE. deployed on Advanced Land Observing Satellite (ALOS). The Advanced Land Observing Satellite (ALOS) hosts the Advanced Visible and Near-Infrared Radiometer type 2 (AVNIR-2), the Panchromatic Remote sensing Instrument for Stereo Mapping (PRISM) and the Phased Array type-L band Synthetic Aperture Radar (PALSAR). The satellite, developed by the Japan Aerospace Exploration Agency (JAXA), was launched in 2006 and was active for 5 years. It has since lost power, but remains in orbit. It's mission included cartography, regional observation, disaster monitoring and resource surveying. <div property="cedacat:introduction"> <div class="introduction">Introduction</div> <p>The Advanced Land Observing Satellite (ALOS) holds the <a href="http://badc.nerc.ac.uk/view/neodc.nerc.ac.uk__ATOM__DPT_68bd974a-17f5-11e4-9375-00163e251233">Advanced Visible and Near-Infrared Radiometer type 2 (AVNIR-2)</a>, the Panchromatic Remote sensing Instrument for Stereo Mapping (PRISM) and the <a href="http://badc.nerc.ac.uk/view/neodc.nerc.ac.uk__ATOM__DPT_d29cb904-27b6-11e4-a0e1-00163e251233">Phased Array type-L band Synthetic Aperture Radar (PALSAR)</a>. The satellite, developed by the Japan Aerospace Exploration Agency (JAXA), was launched in 2006 and was active for 5 years. It has since lost power, but remains in orbit. It's mission included cartography, regional observation, disaster monitoring and resource surveying. </p> </div>
Input Description
None
Output Description
None
Software Reference
None
There are no comments about this dataset
Temporal Range
2007-01-01T00:00:00
2009-12-31T00:00:00
Geographic Extent

  58.9000°  
-9.8000°     0.2000°
  50.2000°  
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