Joint Airborne IASI Validation Experiment (JAIVEX)

JAIVEX-IASI collaborative workspace for project participants - access by invitation only - click here.

Introduction

IASI, the Infrared Atmospheric Sounding Interferometer, was launched on METOP, a European meteorological polar-orbiting satellite, in October 2006. (Delayed from April 2006). Funded by EUMETSAT, the Joint Airborne IASI Validation Experiment (JAIVEX) will use the FAAM BAe146 aircraft in validation studies of IASI radiative transfer and some level 2 products.

The project will take place in April and September 2007 and will involve flights over oceans timed to coincide with METOP satellite overpasses. Further flights will be flown low level over specific land calibration sites to characterise land surface emissivity. There may also be co-incident flights with other platforms including US ER-2 or Proteus aircraft and French high altitude balloon.

Availability of data

Data collected onboard the FAAM Bae-146 aircraft(*) will be stored in the FAAM archive and also visible in the IASI bae-146 archive at the BADC.

(*) The FAAM data include both core and non-core data (for a definition of core data, see the document on FAAM Instruments).

Access to data

(1) Public and restricted data

Access to and use of the data are ruled by the JAIVEX Conditions of use which includes the FAAM conditions of use.

Processed core data collected on board the FAAM aircraft is now available to all users who have agreed to the FAAM data conditions of use. Apply for access here
Access to all other JAIVEX data is restricted to JAIVEX participants and Met Office scientists for two years following the end of the data set collection.*

*After these restriction periods the data will be released to the public domain but requirements will continue to apply to publication of studies based on JAIVEX data.

(Access to FAAM raw core data visible in the archive is restricted to FAAM staff and scientists involved in test flights).

If you wish to apply for access to these sections of the JAIVEX archive, please follow the guidelines below.

register as a BADC user — if you are already a registered BADC user, skip this step; if you have forgotten your BADC user ID and/or password, please contact the BADC helpdesk at badc@rl.ac.uk;
Apply for access
- JAIVEX participants (non UK Met Office) — you will be asked to abide by the JAIVEX Conditions of Use.
- UK Met Office scientists who have participated in previous MO-led FAAM projects will also have access to the FAAM data collected for JAIVEX. Met Office scientists who do not have access should apply here. Please see the Met Office aircraft data users conditions.

(2) Where to find the data

Data and documentation supplied to the BADC by the project teams are stored in the IASI JAIVEX archive, from where they can be viewed and downloaded by authorised users.

Further (non-FAAM) JAIVEX data will be stored in the US. See the US JAIVEx Web page - with links to further JAIVEX data (NAST-I, S-HIS, and radiosondes).

Data format - File names

• Non-FAAM data and FAAM non-core data are formatted in NASA Ames.

• FAAM processed core data are formatted in NetCDF.

• FAAM raw core data are stored in zipped VMS files.

File names follow the BADC file name convention and (for FAAM data) the FAAM file name convention.

Instructions to data providers

Data file names. Data providers are kindly requested to follow the BADC file name convention. Additional rules apply to FAAM file names. Note that the first component of the file name is the instrument (or group of instruments, or model) name. Please refer to the current list of standard instrument/model names. and advise the BADC if your instrument or model is not in the list, or if you would like to record data from several instruments in a single file, so that we can update the list.
Data file format. Please format your data in NetCDF, using the CF metadata conventions. NASA Ames formatted files are also accepted. If you wish to check that files are correctly formatted before uploading them please use the NetCDF format checker or the BADC NASA-Ames format checker.
Metadata. It is important that the data be well documented. Please follow the BADC guidelines regarding the submission of metadata. Some standard metadata have to be provided in the data files themselves. Additional separate documents are welcome.

Documentation

JAIVEX Data Protocol – Conditions of Use of JAIVEX data at BADC.
FAAM Data Protocol
FAAM Conditions of Use applying to processed core flight data.
Metadata
NetCDF format and CF metadata conventions.
NASA-Ames data and metadata format including time variable
The BADC File Name Convention and the list of Standard Instrument Names
The FAAM File Name Convention.

Services

Links to further information

FAAM Welcome Page at BADC
Facility for Airborne Atmospheric Measurements (FAAM) web site
US JAIVEx Web page - with links to further JAIVEX data (NAST-I, S-HIS, and radiosondes)

Citation

FAAM, UK Meteorological Office,[Taylor, J.]. FAAM - Joint Airborne IASI Validation Experiment (JAIVEX), [Internet]. British Atmospheric Data Centre, 2007-,Date of Citation. Available from http://badc.nerc.ac.uk/data/jaivex/.

Who to contact

The JAIVEX Principal Investigator is J. Taylor (Met Office).
Any query regarding the data should be sent to the BADC help desk.

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