Please enable JavaScript. Radar satellites bounce radar signals off the ground and record the weak echo signal to deduce radar reflectiveness of sites on the ground which differs between the various types of vegetation, water bodies and man-made structures. The color of the mosaic images sometimes differs from path to path, which is due to the change of backscattering intensity caused by change of land cover or soil moisture. In each scan and polarization, the gaps between bursts in a sub swath are filled with zeros and range and azimuth compressions are performed. Line-of-sight displacement measured from ALOS-PALSAR acquisitions of August 31, 2007 and September 2, 2008 — one year separation (upper panel), September 02, 2008 and July 24, 2010, an interval of almost two years (middle panel) and August 31, 2007 and September 8, 2010, an interval of three years (lower panel). PALSAR-2 global mosaic and forest/non-forest map Masanobu Shimada, Takuya Itoh, Takeshi Motooka, Manabu Watanabe, Shiraishi Tomohiro, Rajesh Thapa, and Richard Lucas, "New Global Forest/Non-forest Maps from ALOS PALSAR Data (2007-2010)", Masanobu Shimada, and Takahiro Ohtaki, "Generating Large-Scale High-Quality SAR Mosaic Datasets: Application to PALSAR Data for Global Monitoring", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 3(4):637 - 656, January 2011. Here, the "forest" is defined as the tree covered land with the area larger than 0.5 ha and canopy cover over 10 %, as same to the FAO definition. Image quality corrections (noise reduction and dynamic range compression) are performed to the level 1.5 data. In the case of the SPECAN method, an image file per each scan and polarization is generated. The ALOS-2 was launched by the H-IIA Launch Vehicle on May 24, 2014. Figure 1: (Left top) PALSAR global mosaic in 2009, (right top) PALSAR forest/non-forest map in 2009, (left bottom) PALSAR-2 global mosaic in 2015, and (right bottom) PALSAR-2 forest/non-forest map in 2015. If you have any question about the data or would like to purchase the data, please. Global 25m resolutions PALSAR-2/PALSAR mosaic and forest/non-forest map are free and open dataset generated by applying JAXA's powerful processing and sophisticated analysis method/techniques to a lot of images obtained with Japanese L-band Synthetic Aperture Radars (PALSAR and PALSAR-2) on Advanced Land Observing Satellite (ALOS) and Advanced Land Observing Satellite-2 (ALOS-2). document.write(""+a+"@"+d+""); Mode Swath width (km) Resolution (range x azimuth, m)* Polarization … document.open(); Advanced Land Observing Satellite- Phased Array L-band Synthetic Aperture Radar-2 (ALOS-PALSAR) is a high-resolution L-band satellite launched by Japan Aerospace Exploration Agency (JAXA). Precise diagnosis of the earth using “L-band SAR” Japanese advanced … Copy right of images used in this website is as follows. contact them : （data@restec.or.jp） This button is linked to the “PF” What’s about Earth Observation Data Utilization Promotion Platform ? After the confirmation of your request, the download information will send by email. 2. Geometrically corrected (orthorectified) data using the digital elevation data from Level 1.1. * Recommend to use Microsoft Edge, Google Chrome, Mozilla Firefox, Apple Safari. Global 25m resolution JERS-1 (Japanese Earth Resources Satellite-1) SAR mosaic dataset has been added since October 31, 2016. Dataset description document has been updated (Ver.D). Advanced Land Observing Satellite-2 ALOS-2) and PALSAR-2 - Performance and the calibration - Masanobu Shimada Japan Aerospace Exploration Agency, Earth Observation Research Center Jan 23 and 26 2015 ESRIN, Frascatti, Italy CONTENTS • ALOS-2/ ALSAR-2 • Mission objectives • Current Status of PALSAR-2 • Calibration (Initial and operational) • Science and Application • Deformation measurement … Annual data are only used for mosaicking and not used past year’s data for filling gaps. Geo-coded: Map projection based on north-oriented map direction, *The values are defined at the incidence angle 37 deg. The PALSAR-2 is capable of observing day and night, and in all weather conditions. The size of one pixel is approximately 25 meters by 25 meters. About ALOS; PRISM: Panchromatic Remote-sensing Instrument for Stereo … //--> ALOS/PALSAR/AVNIR-2 and ALOS-2 ScanSAR data products usage conditions: (i) JAXA does not guarantee any specific quality and the timely provision of the ALOS/PALSAR/AVNIR-2 and ALOS-2 ScanSAR data products and shall not be liable for any damage brought about using them. This is multi-look data on the slant range from map projection amplitude data, with range and azimuth compressed. The state-of-the-art L-band Synthetic Aperture Radar (PALSAR-2) aboard ALOS-2 will have enhanced performance compared to ALOS/PALSAR. Spacecraft Launch Mission Status Sensor Complement Ground Segment References. The global 25m PALSAR/PALSAR-2 mosaic is a seamless global SAR image created by mosaicking strips of SAR imagery from PALSAR/PALSAR-2. ALOS/PALSAR data are distributed by Remote Sensing Technology Center of Japan(RESTEC). Range and azimuth compressions are performed per each burst. Global monitoring with satellite remote sensing is one of the most effective approaches to detect land surface changes because satellites can provide wall-to-wall images covering wide areas periodically. The state-of-the-art L-band Synthetic Aperture Radar (PALSAR-2) aboard ALOS-2 will have enhanced performance compared to ALOS/PALSAR. JavaScript is required to access this part of the page. The last letter of each code designates the polarization: S (Single) D (Dual) Q (Quad) Each mode is described in the following tables. Although the predecessor Overview. Due to the geometric accuracy improvement, misalignment between the published images may occur. The state-of-the-art L-band Synthetic aperture Radar aboard ALOS-2 is an active microwave radar using the 1.2 GHz frequency range which will have enhanced performance compared to ALOS/PALSAR. K, PDFfile, 476KB). This definition is the same as … ALOS/ALOS-2 PALSAR/PALSAR-2 and JERS-1 SAR Data Wrangling Script. *Stripmap and Full (Quad.) The most detailed observation mode with 1 by 3 meters resolution (observation width of 25 km), A high-resolution mode with the choice of 3, 6 or 10 meters resolution (observation width of 50 or 70km), A broad area observation mode with observation width of 350km or 490km, and resolution of 100m or 60m respectively. Product up to 2018: Sigma-SAR IMAGE (for orthorectification) and Sigma-SAR MOSAIC (for mosaicking), Product after 2019: Sigma-SAR IMAGE (for orthorectification) and GDAL (for mosaicking), Product up to 2018: binary image file + header file, Product after 2019: Geotiff + XML metadata (in compliance with CARD4L (CEOS Analysis Ready Data for Land) specifications), Resolution: approx. Contact Us| The dataset download site is, https://www.eorc.jaxa.jp/ALOS/en/palsar_fnf/data/index.htm. Requirements. This dataset is available to use with no charge under the "Terms for Use". In wide-area mode, image files are created for each scan. It is required your email address. The main instrument of the ALOS-2 spacecraft is PALSAR-2 – the Phased Array L-Band Synthetic Aperture Radar-2 that uses Active Phased Array Antenna technology. ALOS-2(PALSAR-2),ALOS(PRISM and AVNIR-2): JAXA. This satellite was launched on 24 May 2014 with enhanced capabilities. JERS-1 SAR yearly mosaic for tropical regions from 1993 to 1998 were released. Dataset description document has been updated (Ver. B). … Replaced 9 tiles of 2015 dataset. The training is part of the agreement between the Department of Science and Technology and JAXA on the use of Japanese satellite data for Philippine applications. The PALSAR-2 is capable of observing day and night, and in all weather conditions. PALSAR-2 global mosaic map in 2018 was released. The Phased Array-type L-band SAR-2 (PALSAR-2) mounted on ALOS-2 has capabilities of high-resolution, wide-swath width and both right and left looking observations, and is now operating globally to achieve these objectives. I have been conducting a study of postseismic deformation following the 2016 Kumamoto earthquake using ALOS-2/PALSAR-2 acquired till 2018. Japanese. I apply ionospheric correction to interferograms of ALOS-2/PALSAR-2. Underlying background images are SAR intensity. The global forest/non-forest map (FNF) is generated by classifying the backscattering intensity values in the global 25m resolution PALSAR-2/PALSAR mosaic so that strong and low backscatter in HV-polarization are classified "forest" (colored in green) and "non-forest" (colored in yellow), respectively. It is widely used software for the general public.