HIRDLS
STATUS
HIRDLS Is Carried On The Aura Mission, Part Of NASA's Earth Observing System (EOS). Aura Was Successfully Launched On 15th July 2004 At 11:01:59 A.m. BST From Vandenberg Air Force Base, California. HIRDLS Is A Joint US-UK Development Effort, With Sponsors
AVAILABILITY
At the GSFC DISC (formerly the DAAC) and the British Atmospheric Data Center (BADC).
REQUEST PROCEDURE
Version 4 retrieved profiles are freely available at the GSFC DISC, and the BADC. It is expected that an improved Version 5 will be released early in 2010 or before. Access to Level 0, level 1 and developmental versions of Level 2 data will be restricted to the HIRDLS science/validation teams, and to holders of HIRDLS related grants. To apply for access to the restricted HIRDLS data contact one of the PI's, Prof. John Gille (U.of Colorado/NCAR) in the U.S., or Dr. J.J. Barnett (Oxford University) in the U.K. Users in the U.K. can obtain the data from the BADC. You will need a BADC username and password. For a reminder of your login details contact the BADC Helpdesk. For access to experimental data versions, users will need to agree to the HIRDLS conditions of use and your application be approved by one of the HIRDLS co-PI's. This may take a few days to complete.
Satellite Instruments
HIRDLS is an mid-infrared limb-scanning radiometer (21 channels from 6.12 to 17.76 ┬Ám) designed to monitor the global distributions of temperature, clouds, aerosols, and 10 trace species O3, H2O, CH4, N2O, NO2, HNO3, N2O5, CFC11, CFC12, and ClONO2 in the stratosphere and upper troposphere at high vertical and horizontal resolution in the Earth's atmosphere between about 8 and 100 km. HIRDLS aimed to provide sounding observations with horizontal and vertical resolution superior to that previously obtained; to observe the lower stratosphere with improved sensitivity and accuracy; and to improve understanding of atmospheric processes through data analysis, diagnostics, and use of two- and three-dimensional models. An accident during launch has led to a blockage of the optical train, reducing instrument capabilities. In its present state, HIRDLS can not obtain data with high longitudinal resolution, or see the atmosphere over Antarctica. At present the vertical range is limited to 65 km, and only temperature, ozone, nitric acid, CFC 11 & 12 and aerosol information is of quality sufficient for scientific use. Further work is continuing to improve the quality of the other species. The chopper stalled in March 2008, halting at least temporarily data collection, although efforts continue to restart the chopper.
CONTACT
John C. Gille
University of Colorado & NCAR
P.O. Box 3000 Boulder CO 80307-3000 USA
303 497 8062
gille@ucar.edu
SECONDARY CONTACT
Joanne Loh
University of Colorado
P.O. Box 3000 Boulder CO 80307 USA
303 497 8070
loh@ucar.edu
SPECIFICATIONS
Measurment TypeVisible/IR-sounder
Platform TypeAURA
OrbitSun synchronous
Spectral Coverage
Active/PassivePassive
Scan PatternStare
Variables
Altitude
Inclination
Repeat Time
Wavelength6.12 to 17.76um
Number of Bands21
Start DateJan 2005
End DateMar 2008
Temporal CoverageMostly continuous during coverage period.
Swath Widthlimb profiler
Resolution 11km
Resolution 210km
REFERENCES
Gille, J.C., et al. 2008: J. Geophys. Res. Nardi, B. et al. 2008: J. Geophys. Res. Kinnison, D. et al. 2008: J. Geophys. Res. Alexander, J. et al. 2008: J. Geophys. Res.
REMARKS
As data versions will change and evolve, it is suggested that users review the web sites and data quality documents for later developments.
UPDATED ON
14 Oct 2009 14:15