Mr. Michael Fraczek Profile

Michael Fraczek

at Airbus Defence and Space

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 20 October 2010 Paper

Optical air temperature and density measurement system for aircraft using elastic and Raman backscattering of laser light

Andreas Behrendt, Michael Fraczek, Nikolaus Schmitt

Proceedings Volume 7835, 78350D (2010) https://doi.org/10.1117/12.865541

KEYWORDS: Temperature metrology, Backscatter, Receivers, Laser scattering, Interference filters, Scattering, Signal detection, Raman spectroscopy, Sensors, Atmospheric particles

Read Abstract +

A novel concept of an optical system for remote temperature and density measurements from aircraft is presented. The system shall monitor local air data being critical for aircraft control. The measurement method overcomes the drawbacks of conventional probes, which is mainly the vulnerability to mechanical damage caused in harsh weather conditions or e.g. by volcanic ash. The measurement system is based on LIDAR technology used to extract air temperature and density information out of the elastic and Raman backscatter, generated by scattering of a laser beam from air molecules and airborne particles. Four optimized interference filters constitute the core of the four measurement channels. The measurement method, the setup of a prototype, and first results of laboratory test measurements with a single laser pulse energy of 145 mJ at a wavelength of 532 nm are presented. The results confirm our simulations of the expected system performance. With regard to temperature measurements, the measurement precisions with current experimental settings like the central wavelengths of the rotational Raman interference filters amount 0.7 K at 1000 hPa to 2.9 K at 165 hPa for one pulse detection and 0.25 K at 1000 hPa to 1.1 K at 165 hPa for an average over 10 pulses (equal to 1 s measurement time). With regard to density measurements the corresponding errors are ranging from 0.4 % (1000 hPa) to 1.5 % (165 hPa) for one pulse detection and from 0.15 % (1000 hPa) to 0.6 % (165 hPa) for an average over 10 pulses. Further optimization is expected to reduce the required laser power and improve the precision further.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years