1 / 8

The GeoTASO IIP Project

The GeoTASO IIP Project. Jim Leitch Ball Aerospace jleitch@ball.com 303-939-5280. GeoTASO Will Bridge the STM to Sensor/Algorithm Requirements Gap. Project goals: Demonstrate a compact sensor configuration for a UV-Vis spectrometer Test spectral parameter dependence of retrievals

Samuel
Download Presentation

The GeoTASO IIP Project

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. The GeoTASOIIP Project Jim Leitch Ball Aerospace jleitch@ball.com 303-939-5280

  2. GeoTASO Will Bridge the STM to Sensor/Algorithm Requirements Gap Project goals: • Demonstrate a compact sensor configuration for a UV-Vis spectrometer • Test spectral parameter dependence of retrievals • Collect real scene data from an airborne platform and test retrievals Project draws from previous ESTO-funded work on spectrometers (GeoSpec) and depolarizers (PolZero) and from retrieval studies GeoSpec IIP Time Domain Depolarizer ACT

  3. GeoTASO Team • Ball Aerospace • Jim Leitch, Principal Investigator • Tom Delker, Sensor Technical Lead • Bill Good, Airborne Measurements • NASA/GSFC • Scott Janz, Instrument Requirements, Sensor Advisor • Ken Pickering, Science Requirements, Campaigns • Nick Krotkov, Science Requirements • Harvard/SAO • Kelly Chance, Trace Gas Retrievals, Instrument Requirements • Xiong Liu, Ozone Retrievals, Instrument Requirements • U Nebraska • Jun Wang, Aerosol Retrievals, Science Requirements GeoCAPE Science Team Sensor Params Performance Predicts GeoTASO Sensor Ball, GSFC Rqmnts GeoTASO Algorithms SAO, GSFC, UNeb Data

  4. GeoTASO Sensor: Multi-order Offner Spectrometer • Spectrometer • Multiple diffraction orders from grating • Orders are spatially overlapped • Dichroic split of two spectral ranges • Dichroicbeamsplitter and filters for detectors are critical components • Strawman design covers 290-510nm spectral range • Overlapping diffraction orders keep spectrometer small Ball Aerospace & Technologies Corp. Proprietary Information

  5. Trade Space and Spectral Parameters Multi-order spectrometer options • Can extend spectral coverage if passbands relaxed • Change in coverage moves split between channels • Bounding cases given here are at 3 samples per passbandFWHM Selectable Spectral Sampling/Passband • Replaceable slit allows change of spectral parameters • Gives data for retrieval tests using several passband/sampling combinations

  6. Trace Gas and Aerosol Retrieval Tests • Verification of algorithm sensitivity studies • Retrieval dependence on spectral sampling, SNR, spectral passband • Test of retrievals using real scene data • High spatial scale and spectral scale data to be used • Comparison with space-based measurements using underflights of OMI • Sensor FOV matches OMI footprint • Tests of spatial scale effects from oversampled OMI footprint • Tests of algorithm approaches and fitting details • Optimal estimation versus nonlinear least-squares fitting of AMF-normalized reference spectra • Aerosol and cloud interference • Albedo variation at visible wavelengths

  7. Project Timeline and Planned Activities • Start Date: May 2011 (Kickoff held 10 May 2011) • Year 1: Requirements, Design, Procurements/Fabrication • Year 2: Assembly/Alignment, Lab Tests, Calibration, Algorithm Prep • Year 3: Flight Campaigns, Retrievals

  8. GeoTASO Project Summary • Project start this week • Initial trades and requirements work based on STM, algorithm sensitivity studies • Compact, 2-channel spectrometer may offer lower mass approach for space sensor

More Related