Dr. Yucheng Chang Profile

Dr. Yucheng Chang

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 | 3 January 2025 Poster + Paper

NO2 validation during the NASA Asia-Air Quality Flight Campaign with an experimental portable DOAS (PDOAS) at Kaohsiung

Feng Zhang, Changyong Cao, Tung-Chang Liu, Xi Shao, Jan-Lukas Tirpitz, Shobha Kondragunta, Yucheng Chang

Proceedings Volume 13262, 132620Q (2025) https://doi.org/10.1117/12.3040761

KEYWORDS: Nitrogen dioxide, Air quality, Portability, Satellites, Equipment, Stars, Spectroscopic atmospheric monitoring techniques, Spectral density, Quality measurement, Correlation coefficients

Read Abstract +

This study focuses on retrieving and validating Nitrogen dioxide (NO₂) trace gas vertical column densities (VCDs) using an experimental Portable Differential Optical Absorption Spectroscopy (PDOAS) instrument deployed at Kaohsiung during the National Aeronautics and Space Administration (NASA) Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ) field campaign in the spring of 2024. The PDOAS spectral measurements at multiple viewing elevation angles between 1 and 90 deg were processed with the widely recognized QDOAS software package to obtain Differential Slant Column Densities (DSCD) for NO₂ and O₄. Subsequently, the QDOAS results were further analyzed using the Retrieval of Atmospheric Parameters from Spectroscopic Observations using DOAS Instruments (RAPSODI) software to determine the vertical column densities (VCDs) of NO₂. As an initial evaluation of the NO2 VCD retrievals from PDOAS measurements, the PDOAS retrievals are compared with data from the Geostationary Environment Monitoring Spectrometer (GEMS). After excluding measurements contaminated by clouds, 10 effective measurements collected over four days were compared. A high correlation coefficient of 78.93% was found between our PDOAS-retrieved NO₂ VCDs and those from GEMS. This correlation coefficient is comparable to correlations between long-term daily mean NO₂ retrievals from GEMS and in-situ station observations in Kaohsiung. The compact and portable design of PDOAS allows for flexible and mobile air quality measurements. Additionally, the instrument and methodologies developed for PDOAS can be extended beyond NO₂ analysis, making them suitable for examining aerosols and other trace gases as well.

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