envisat asar polarisation

envisat asar polarisation
October 28, 2020

0000013922 00000 n 29 0 obj<> endobj 0000006839 00000 n 0000011854 00000 n %PDF-1.3 %���� Ocean Currents and Topography; These products consist mainly of the ASAR instrument source packets (ISPs) and are accompanied with a minimum set of characterizing annotation parameters. 0000005521 00000 n For cross-polarized data we so far have only a very limited data set available, showing that the same 0000131781 00000 n As an additional activity the EO-SIP conversion covers also the ASAR Wave L1 dataset for the full mission, 2002-2012. This is a high-rate, narrow swath mode, so data is only 8, 2012. The ASAR AP mode can only provide a 100 km swath. 0000013332 00000 n This data center does not have any addresses listed. Delta Bulk processing of Envisat ASAR GM Level 1 – ASA_GM1_1P (2005-2012) ASAR Alternating Polarisation Mode Single-Look Complex. The W values vary from 2 till 7 m/s (Figure The Alternating Polarization (AP) mode of ASAR provides both co-polarized (HH+VV) channels or one co- and one cross-polarized (HH+HV or VH+VV) channel. ( 0000002860 00000 n This product contains time-ordered AISP corresponding to one of the three possible polarisation combinations: HH & HV, VV & VH and HH & VV, respectively). Operated by the European Space Agency (ESA), it was the world's largest civilian Earth observation satellite. More Information: possible polarisation combinations: HH & HV, VV & VH and HH & VV, 0000002663 00000 n The corresponding product is then furnished as two images acquired with three possible polarisation combi-nations: HH and VV, HH and HV, VV and VH. ), Earth Topic: Water Sea Ice; 0000000016 00000 n The ASAR data set available shows that this threshold is also suitable for ENVISAT ASAR co-polarized data acquired in Image, Alternating Polarisation and Wide Swath Mode. <]>> This collection does not have any associated services at this time. The ESA EO products online search service is a collection-based functionality; available collections data … image swaths. 0000001643 00000 n 1, 2002, by ESA and operated until Apr. 0000013543 00000 n Delta Bulk processing of Envisat ASAR Alternating Polarization Mode Level 1 - ASA_APM_1P (2006-2012) There is no archive and distribution information for this collection. 0000002617 00000 n ENVISAT illustrating the location of instruments contained as part of the spacecraft (ESA, 2006) 2. after data acquisition, while the OFL, fully consolidated, version is available 0000004318 00000 n Coverage: 100 km * 12,000 km (30 min) 0000116912 00000 n In single polarisation mode (IM), ASAR improves the heritage of ERS missions by offering two polarisations (HH and VV), vari- The original projects were focused on the generation of the L0 Master Dataset in EO-SIP format + L1 processing (Medium Resolution products) of all the ASAR modes for the period 2002-2005. 0000006015 00000 n ASAR provides a choice of two polarisations ( out of H, VV, and VH ) as well as a variety of imaging modes, such as different incidence angles, standard and ScanSAR wide swath modes. Max size: 22,500 Mbytes ENVISAT ASAR Operation Modes Image VV or HH < 30m resolution up to 100 km swath RAW, SLC, PRI, GEC Alternating Polarisation VV/HH or VV/VH or HH/HV 30m resolution up to 100 km swath RAW, SLC, PRI, GEC Wide Swath VV or HH 150m resolution 405 km swath width SLC, ES image format Global Monitoring VV or HH 1000m resolution 405 km swath width The details of the activated activities are listed below: These products contain time-ordered AISPs corresponding to one of the three Space Agency (ESA) ENVISAT satellite provides the first opportunity to investigate multi-polarization sea ice signatures over an entire ice season. ASA.APG_1P. ( ASA.APP_1P. Envisat ASAR image with VV-polarization acquired from a descending orbit 12367 on 12 July 2004 is shown in Figure 2a. I-00044. The Level 0 product is produced systematically for all data acquired within this mode. The ASAR instrument onboard the satellite operated at C-band (5.3 GHz) and was capable of acquiring data in multiple modes (image, alternating polarization, wave, ScanSAR (wide swath), and ScanSAR (global monitoring)) at various incidence angles and in several polarizations. %%EOF xref 0000008823 00000 n The ASAR is able to acquire data with alternating polarisa-tion (AP). Envisat ("Environmental Satellite") is a large inactive Earth-observing satellite which is still in orbit. ASA.APS_1P. H��VˎG��WԱ��UYϾɖ0#qXq@�`��]�����Y=�?d���ٝ��̪�"��>N����������K���:)ݧ�vR����z�0E��M)VȩD߳��}�P�_��. Order data. It features enhanced capability in terms of coverage, range of incidence angles, polarisation, and modes of operation. 0000016600 00000 n 31 0 obj<>stream ASA_AP__0P - Level 0 Scenes product for ENVISAT ASAR Alternate Polarisation Mode. 0000017738 00000 n The details of the activated activities are listed below: Delta Bulk processing of Envisat ASAR Alternating Polarization Mode Level 1 - ASA_APM_1P (2006-2012) ( This product contains time-ordered AISP corresponding to one of the three possible polarisation combinations: HH & HV, VV & VH and HH & VV, respectively). HH polarisation, shown in figure1.21 , is the preferred polarisation configuration in a number of applications.For instance, in the study of soil moisture, if we ignore the crop density differences, then the vertically oriented crops (e.g., wheat and barley) have improved penetration with HH, allowing the backscatter to represent the soil moisture regime better rather than the crop geometry. The Envisat satellite was launched on Mar. The project “ASAR AP/IM/WS/GM additional activities” consists in the activation of all optional activities not previously carried out within the original ENVISAT ASAR IM/AP/WS/GM Projects. ENVISAT ASAR DATA PROCESSING Urs Wegmüller, Tazio Strozzi, Charles Werner and Andreas Wiesmann Gamma Remote Sensing, Thunstrasse 130, CH-3074 Muri, Switzerland ... ASAR swath and polarization are documented in the sensor element of the SLC parameter file. ( For information on access and use of the On-The-Fly service please refer to the OTF FAQ page and news of 30 August 2016. The echo samples in the AISPs have been compressed to 4 bits/sample using FBAQ. The NRT version of the product is available from the PDHS 1 day ), Earth Topic: Natural Disasters startxref ASAR Alternating Polarisation Mode Cross-polar H Level 0, Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions, Level 0 Instrument Source Packet Description, Earth Topic: Land 0000081145 00000 n 0000117001 00000 n ASAR works in a range of modes these are: - • Global Monitoring • Wave Mode • Image Mode • Alternating Polarisation (HH/HV, VV/VH, HH/VV) • Wide Swath 0000006428 00000 n acquired for partial orbit segments and may be from one of seven different ( Refer to the other subsections within "Special Features of ASAR" 1.1.5. for more information on these topics ). Frascati, Help in Ordering Envisat Products, Toggle Archive And Distribution Information, https://earth.esa.int/web/guest/data-access/browse-data-products, http://envisat.esa.int/dataproducts/asar/CNTR2-5.htm#eph.asar.prodalg.leva.L0intro.prod.high.altmode, http://envisat.esa.int/helpandmail/help_order.html. Vegetation; The incidence angle varied between 18.7 and 26.2 degrees over the image. Envisat carries an array of nine Earth-observation instruments that gathered information about the Earth (land, water, ice, and atmosphere) using a variety of measurement principles.A tenth instrument, DORIS, provided guidance and control.Several of the instruments were advanced versions of instruments that were flown on the earlier ERS 1 and ERS 2 missions and other satellites. 29 37 ASAR Alternating Polarisation Mode Cross-polar H Level 0 (ENVISAT.ASA.APH_0P) ENVISAT (3593) recent views. [The Envisat Product Handbook, ASAR Level 0 Products]. Delta Bulk processing of Envisat ASAR Wide Swath Mode Level 1 – ASA_WSM_1P (2006-2012) bits/sample using FBAQ. ASA_AP__0P - Level 0 Scenes product for ENVISAT ASAR Alternate Polarisation Mode Info. The echo samples in the AISPs have been compressed to 4 Envisat User Services. Figure 1. The image covers 100 × 100 km2 centred around 42°40′N, 131°50′E. 0000001371 00000 n EO-SIP packaging of all ASAR AP/IM/WS/GM L1 datasets including ASAR Wave (2002-2012) 0000057392 00000 n Data Repatriation of all ASAR AP/IM/WS/GM L1 processed data 2006-2012 (Envisat format) + repatriation of the EO-SIP format for all ASAR L1 datasets including ASAR Wave (2002-2012). ASAR Alternating Polarisation Mode Cross-polar V Level 0. Via Galileo Galilei, CP 64 ASAR Alternating Polarisation Mode Cross-polar H Level 0. 0000014299 00000 n ESA/ESRIN respectively). ASA_APH_0P: ASAR Alternating Polarization Level 0 (Cross polar H), , Wind field was retrieved from σ o VV values using scatterometer algorithm (1). from the PAC after 2 weeks. As an additional activity the EO-SIP conversion covers also the ASAR Wave L1 dataset for the full mission, 2002-2012. The image covers 100 × 100 km 2 centred around 42°40′N, 131°50′E. ASA.APV_0P. This is a high-rate, narrow swath mode, so data is only acquired for partial orbit segments and may be from one of seven different image swaths. 0000001451 00000 n this mode. 0000001036 00000 n 0000010329 00000 n ASA.APM_1P A series of data has been collected and analysed over Canadian and Norwegian waters, as well as other locations of opportunity. 0000097184 00000 n "http://envisat.esa.int/dataproducts/asar/CNTR2-5.htm#eph.asar.prodalg.leva" The activated optional activities are covering the L1 Delta Bulk Processing for the years 2006-2012 plus the EO-SIP conversion of all the bulk processed ASAR L1 Medium Resolution datasets for the entire Mission (2002-2005 + 2006-2012). Snow and Ice; Envisat ASAR image with VV-polarization acquired from a descending orbit 12367 on 12 July 2004 is shown in Figure 2a. Oil Slick; ASAR Modes. ASA_APH_0P: ASAR Alternating Polarization Level 0 (Cross polar H) These products contain time-ordered AISPs corresponding to one of the three possible polarisation combinations: HH & HV, VV & VH and HH & VV, respectively). 0000006636 00000 n This enhanced capability is provided by significant differences in the instrument design: a full active array antenna equipped with … , ASAR Alternating Polarisation Ellipsoid Geocoded Image. ENVISAT / ASAR data for all five operational ASAR modes (image, wave, alternating polarization, wide-swath and global monitoring) are archived in raw format as level 0 products. The ENVISAT ASAR (Advanced Synthetic Aperture Radar) AP (Alternating Polarisation) mode provides a new opportunity for spaceborne monitoring of vessel traffic and fishing activities. Soil; 0000001855 00000 n Data Size: 56-100 km across track x 100 km along track. Three x�b```f``�a`e`�\� ̀ �@16� polarisation [6], [19]. 0 The Level 0 product is produced systematically for all data acquired within This data center does not have any contact mechanisms listed. 0000008233 00000 n View Envisat quick-look images and metadata. 0000008647 00000 n Documentation information is not available for this collection.

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