Dr. Elena Cristea Profile

Dr. Elena Cristea

at Österreichische Akademie der Wissenschaften

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 | 13 October 2006 Paper

Altimeter range determination and applications using a transponder

Elena Cristea, Philip Moore

Proceedings Volume 6360, 63600F (2006) https://doi.org/10.1117/12.691041

KEYWORDS: Transponders, Satellites, Radar, Calibration, Atmospheric modeling, Climate change, Speckle, Distance measurement, Antennas, Atmospheric corrections

Read Abstract +

Within the Gavdos Project (Establishment of a European radar altimeter calibration and sea level monitoring site for Jason, Envisat and Euro-Gloss), a transponder has been used for an experimental work package. The instrument has been deployed on the island of Gavdos beneath the ascending pass of Envisat and was receiving the altimeter pulses, amplifying and retransmitting them back to the altimeter. The transponder could thus be easily identified in the altimeter data stream in the characteristic variation of the waveform power. Acting as a point target for the satellite radar altimeter, the range measurements from the satellite to the transponder are not subject of "speckle" effects, as it happens in the case of the sea surface when the multitude of scatters cause interference effects to the radar echo. The distance measurement has a resolution of < 1 cm [1]; provided that the atmospheric delays are properly modeled, the accuracy of a range measurement is estimated to 2 cm. The applications deriving from the use of the transponder in the altimetry context are based on the accurate determination of the transponder-satellite distance. These include the altimeter bias calibration, the measurement of the orbit radial errors especially in places where positioning systems are unavailable, determination of ice thickness, and height transfer between land and ocean or land and land.

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