Dr. Christine Wilson Profile

Dr. Christine Wilson

at McMaster Univ

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 | 26 August 2022 Poster + Presentation

Tracking ALMA System Temperature with Water Vapor Data at High Frequency

Hao He, William Dent, Christine Wilson

Proceedings Volume PC12190, PC121901R (2022) https://doi.org/10.1117/12.2642946

KEYWORDS: Calibration, Temperature metrology, Submillimeter telescopes, Radiometry, Opacity, Observatories

Read Abstract +

In this poster, we present a new method to measure system temperature Tsys for ALMA submillimeter telescope high frequency observations. Traditional Tsys measurements for ALMA use discrete atmosphere (ATM) calibrations done every few minutes, which usually involves 10 ∼ 20 ATM calibrations at high frequencies. Our new method use water vapor radiometer (WVR) data to track the continuous Tsys. We find a tight linear correlation between Tsys measured using traditional method and Tsys extrapolated based on WVR data with scatter of 0.5% – 3%. We applied the extrapolated semi-continuous Tsys on a few data sets from Band 7 to Band 10 and compare the flux measured using traditional and our new methods. We find the discrete and continuous Tsys methods give us consistent flux measurements with difference up to 5%, while our new method has slightly better flux consistency. This new method can help to save up to 10% of time for ALMA high-frequency observations.

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