1 / 9

HIRDLS

HIRDLS. High Resolution Dynamic Limb Sounder. Basics. Set to fly on the Aura mission of NASA’s Earth Observation System Joint US-UK (NASA-NERC) development Scheduled for launch in December 2002, then June 2003, now June 17, 2004

perrin
Download Presentation

HIRDLS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HIRDLS High Resolution Dynamic Limb Sounder

  2. Basics • Set to fly on the Aura mission of NASA’s Earth Observation System • Joint US-UK (NASA-NERC) development • Scheduled for launch in December 2002, then June 2003, now June 17, 2004 • Will sound upper troposphere, stratosphere, and mesosphere (8km-80km) to determine : • Temperature/Pressure • Concentrations of : O3, H2O, CH4, N2O, NO2, HNO3, N2O5, CFC11, CFC12, ClONO2, and aerosols • Locations of polar stratospheric clouds and cloud tops

  3. Operational Tidbits • Operates in sun synchronous orbit at 705km • Completes orbit in 105 minutes • Takes ~10,000 profiles per day with one complete profile in 12 hours • Spatial Resolution • Horizontal : 5° x 5° (500km x 500km) • Vertical : 1-1.25km • Measures infrared emission in 21 channels ranging from 570-1600 cm-1 • 4 sensors for CO2, 4 for O3, and 1 for each remaining constituent sampled • Has an onboard gyroscope for accurate reporting of where the instrument was pointing for a given measurement

  4. Scan Cycle

  5. HIRDLS Limb Viewing Geometry (Satellite moving clockwise)

  6. Data processing • CO2 mixing ratio is well known • Using this information and CO2 radiance measurements to determine temperature/pressure information • Using temperature/pressure data with blackbody formula to calculate mixing ratios of the constituent of interest

  7. Limb Radiance Spectra

  8. Weighting Functions Ch. 2-5

More Related