VIRTEM Validation of IASI Radiative Transfer: Experiments and Modelling

General Info

Title:	VIRTEM Validation of IASI Radiative Transfer: Experiments and Modelling
Type:	Data Entity
Sub-Type:	Measurement
Abbreviation:	VIRTEM
Publication State:	published
The publication state of this metadata: 'old' - for redundant records; 'working' - for new/in progress records; 'published' - for records approaching maturity, which may still change, but should be available via the discovery services; and 'Published' for mature records that are unlikely to change and should be available via the discovery services.

URI:	http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dataent_VIRTEM

Summary
A brief description of the data.

Validation data for the IASI (Infrared Atmospheric Sounding Interferometer) satellite instrument. IASI is a moderate resolution (0.25cm^-1) Fourier Transform spectrometer which is scheduled for flight in 2002 on the European METOP satellite. IASI is expected to deliver vertical profiles of temperature and humidity data with a resolution of 1km. VIRTEM is an EU project to validate the instrumentation and retrieval methods to be used on IASI. Data in this data set include both aircraft based and lab based spectroscopic measurements.

Content
The actual data being described by this document. NB, in the case of data granules, this content may just be a reference to an ingested CSML or CDML file.

Introduction

The new satellite instrument, IASI (Infrared Atmospheric Sounding Interferometer), is a moderate resolution (0.25 cm^-1) Fourier Transform spectrometer which is scheduled for flight in 2002 on the European METOP satellite. This instrument offers more spectral channels at a considerably higher spectral resolution than HIRS (High Resolution Infrared Sounder) - the instrument which it is intended to replace as the operational infra-red sounder. IASI is expected to deliver vertical profiles of temperature and humidity data with a resolution of 1km compared with approximately 4km from HIRS.

Translating the improvement in the spectral resolution of the instrument into improvements in the accuracy and height resolution of the temperature, humidity and ozone profiles is dependent on a detailed knowledge of the spectroscopy of the atmosphere in this spectral region. The aim of the VIRTEM project is to make the improvements to the current spectroscopy which are necessary to make full use of the increased spectral resolution of IASI.

The primary objectives of the VIRTEM project are:

To generate a detailed set of atmospheric observations of radiances and supporting in-situ data.
To analyse and validate the current spectroscopy using state of the art line-by-line radiation models.
To generate an improved spectroscopic database.

Data availability and file format

Data are primarly in NASA-Ames format.

Documentation and Links to further information and references

Documentation was held on the virtem site, a copy of which can be found here: www.virtem.rl.ac.uk.

Citation

Date of citation

Who to contact

If you have queries about these pages or about obtaining VIRTEM data from the BADC then you should contact BADC Support. Your query should be answered within one working day. When follow-up work is required, the BADC support will carry out the work as quickly and efficiently as possible, and in any case, the user will be kept informed of progress.

Lineage
Summary of the origins of the dataset, e.g.: "Dataset produced from NASA MODIS instrument on Terra and collected at the University of York's groundstation 1999-2003 and a copy provided to NEODC in June 2007".

Data acquired as is from project participants during the project.

Quality Statement
Description of the relative quality of the dataset.

not known at this time

Author
The principal author of the actual underlying data. Only one author can be specified per atom; if there are multiple authors, these should be specified as 'contributors'. NB, an atom MUST have an author specified.

Name	email
UK Meteorological Office, Max Planck Institute for Meteorology, Laboratoire de Meteorologie Dynamique, Rutherford Appleton Laboratory,

Online References
Online references with a specific relationship to the data being described here. NB, if links are supplied they must be valid and include the transport protocol - e.g. 'http://blah.co.uk'. Also, note, three online references can be added at once; after these are added a further three may be specified - and so on.

Relation	Title
Download	VIRTEM Data Directory
Logo	VIRTEM Logo
Documentation	Copy of VIRTEM project website

Parent Data Entity
Define the parent of this record. There should probably only be one parent, but this is not enforced.

No data specified at present

Sub Data Entities
Lists all entities which have the current entity as their parent.

None

Associated Deployments

Parameters - summary

EARTH SCIENCE

ATMOSPHERICRADIATION

ATMOSPHERE

ABSORPTION

Parameters - details
Parameters to describe the data - with vocab URL and term IDs for further classification. Note, three parameters can be added at once; after these are added a further three may be specified - and so on.

Label	Vocab Term URL	Vocab Term ID
EARTH SCIENCE	http://vocab.ndg.nerc.ac.uk/term/P111	GCAT0001
ATMOSPHERICRADIATION	http://vocab.ndg.nerc.ac.uk/term/P141	NULL
ATMOSPHERE	http://vocab.ndg.nerc.ac.uk/term/P131	NULL
ABSORPTION	http://vocab.ndg.nerc.ac.uk/term/null	NULL

Data Coverage
Summary of the temporal and spatial data coverage for the data.

Spatial coverage
Max Y: 52.21
Min X: -14.0	Max X 14.12
Min Y -8.0

Temporal coverage
Start Date:	1999-01-01
End Date:

Spatial resolution

No spatial resoultion information available.

Vertical extent

No vertical extent information available.

Responsible Parties
Parties responsible for the metadata - e.g. data curator. Responsible parties can have a role specified to make their function clearer. Multiple responsible parties can be specified.

Role	Name	URI
Data Curator	badc.nerc.ac.uk	http://badc.nerc.ac.uk

Other Info
Other miscellaneous information. Note, update frequency relates to the update frequency of the underlying data, not the metadata.

Dataset language

English

Update frequency

Unspecified

Links and Services
	Downloadable XML version of this record

Not all information in this record may be rendered in this view. Please see the XML version for complete content

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