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Envisat ASAR IM L0 [ASA_IM__0P]

Envisat ASAR Image Mode source packets Level 0

Data

19 Apr 2021

Keywords: Agriculture ASAR Biosphere Coastal Processes Envisat Human Dimensions Imaging Radars Land Surface Natural Hazards and Disaster Risk Ocean Waves Oceans Soils Terrestrial Hydrosphere Vegetation
Envisat REGISTER DOWNLOAD Dataset available upon positive evaluation of Project Proposal (usually 2 weeks).

blue arrow DESCRIPTION

The ASAR Alternating Polarization Mode Level 0 (Co-polar and Cross-polar H and V) products contain time-ordered Annotated Instrument Source Packets (AISPs) corresponding to one of the three possible polarisation combinations: HH & HV, VV & VH and HH & VV, respectively. The echo samples in the AISPs have been compressed to 4 bits/sample using FBAQ. This is a high-rate, narrow swath mode, so data is only acquired for partial orbit segments. There are two co-registered images per acquisition and may be from one of seven different image swaths. The Level 0 product was produced systematically for all data acquired within this mode. Data Size: 56-100 km across track x 100 km along track

There are three AP Mode Level 0 products:

  •  ASA_APH_0P: The Cross-polar H Level 0 product corresponds to the polarisation combination HH/HV.
  • ASA_APV_0P: The Cross-polar V Level 0 product corresponds to the polarisation combination VV/VH.
  • ASA_APC_0P: The Co-polar Level 0 product corresponds to the polarisation combination HH/VV= H and H received/V transmit and V received.

blue arrow DETAILS

blue arrow DATA SET SPECIFICATIONS

Spatial coverage: 

90 N, -90 S, -180 W, 180 E

Temporal coverage:

2002-10-18 - 2012-04-08

Date of launch:
2002-03-01
Operators:
ESA
Mission status:
completed
Orbit height:
800 km
Orbit type:
Sun-synchronous
Swath width:
5 - 1150 km

blue arrow PROCESSING LEVEL

level 0,

blue arrow HOW TO ACCESS THIS DATA

Data is available on the ESA Online Dissemination System upon Request Evaluation

The products are available for download via the ESA ERS and Envisat (A)SAR dedicated Online Dissemination Service

The ESA (A)SAR On-the-fly (OTF) data processing and dissemination service allows end-users to gain direct access to the (A)SAR archive from the ERS-1, ERS-2 and Envisat Missions. The data is collection based and allows data browse and download through the treeview as well as via geographical catalogue search based on area of interest and metadata. Interferometric search option is available for relevant collections. Data download is available via HTTPS, including bulk download functionality.

For information on the (A)SAR On-The-Fly service please refer to the OTF FAQ page

For further information about the EO Sign In Service you can visit TellUs

Should you need support please contact EOHelp

 

blue arrow APPLICABLE TERMS & CONDITIONS

Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions

READ T&C

blue arrow RESOURCES

ASAR auxiliary data
Auxiliary Data
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ASAR Products Specification - Revision C
Product Specifications
DOWNLOAD
Envisat ASAR Sensor Performance, Products and Algorithms
Product Information
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Level 0 Instrument Source Packet Description
Product Specifications
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ASA_IM__0P File Structure
Product Specifications
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Envisat ASAR Science and Applications
Technical Note
DOWNLOAD
ASAR Product Handbook
User Manual
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ASAR Product Quality Disclaimer
ASAR Products Anomalies
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More ASAR Documents
Product Specifications
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ASAR Software Tools
Tools
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Get Help?
ESA Earth Observation User Services Portal
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