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Dataset

 

NCAVEO: Leaf Area Index measurements for the fields Brockley, Big Croft and Rickyard, near Chilbolton, recorded using INRA's LAI-2000 plant canopy analyser

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2007-10-17
Download Stats: last 12 months

Abstract

Leaf Area Index (LAI) measurements were made in three fields near Chilbolton, as part of the Network for Calibration and Validation of Earth Observation data (NCAVEO) 2006 Field Campaign. Measurements were carried out over 14-15 June 2006 in fields Brockley (spring barley), Big Croft (oil seed rape) and Rickyard (winter wheat), each of which were planted with different crop types. LAI measurements were made with the LAI2000 instrument loaned from INRA, France (Inst. Ref: N4431), including shadow cap (180 degrees) and measurement configuration: one top of canopy reading (reading A in files) followed by one bottom of canopy (reading B in files).

Within the main sensor the LAI2000 instrument has five separate silicon detectors arranged in concentric rings. When radiation is projected onto the detector each ring sees a different range of zenith angles, up to a maximum 74º field of view. There is no response at zenith angles between 74º and 90º. The sensor is filtered to respond only to radiation below 490nm to minimise the impact of leaf reflectance and transmittance on measured values. The outputs of the five detectors were measured simultaneously for each above or below canopy measurement. Five sample points were located within tramlines in each field and five 10 metre long transects were then set-up, centred on each of these points. 10 measurements were made at each flag. For further details regarding the data's collection and structure, please see the associated metadata document in linked documentation.

Citable as:  Network for Calibration and Validation of EO data (2007): NCAVEO: Leaf Area Index measurements for the fields Brockley, Big Croft and Rickyard, near Chilbolton, recorded using INRA's LAI-2000 plant canopy analyser. NERC Earth Observation Data Centre, date of citation. https://catalogue.ceda.ac.uk/uuid/e157d540c4c8805cd3ca9786ff611959
Abbreviation: Not defined
Keywords: Not defined

Details

Previous Info:
No news update for this record
Previously used record identifiers:
http://badc.nerc.ac.uk/view/neodc.nerc.ac.uk__ATOM__dep_11926328578925349
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

These data were provided to NEODC by university of Southampton, who carried out work to convert formats to NASA-Ames, and write metadata documents. The metadata documents describing the processing are archived alongside the data as PDF files.

Data Quality:
Mostly unknown, but some quality statements are provided in metadata files archived alongside the data.
File Format:
The data is in ASCII format, each file containing the data collected at one flag, as indicated by the four character code in the file name (e.g. ryrw). The first two letters indicate the field name, followed by the flag colour and crop type.

Related Documents

 Metadata PDF

Process overview

This dataset was generated by instruments deployed on platforms as listed below.
Output Description None

No variables found.

Coverage
Temporal Range
Start time:
2006-06-14T23:00:00
End time:
2006-06-14T23:00:00
Geographic Extent

 
51.2026°
 
-1.4718°
 
-1.3859°
 
51.1217°