Dr. Jianwei Wei Profile

Dr. Jianwei Wei

Postdoc Research Fellow at Univ of Massachusetts Boston

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 | 10 December 2014 Paper

Transmittance of upwelling radiance at the sea surface measured in the field

Jianwei Wei, Zhongping Lee, Nima Pahlevan, Marlon Lewis

Proceedings Volume 9261, 926105 (2014) https://doi.org/10.1117/12.2073431

KEYWORDS: Transmittance, Radiometry, Sensors, Lutetium, Water, Ultraviolet radiation, Ocean optics, Remote sensing, Data processing, Calibration

Read Abstract +

The transmittance of upwelling radiance at the air-water interface is a critical quantity in ocean color remote sensing and is usually approximated as a constant (~0.54) for nadir-viewing geometries. Despite its important role, the radiance transmittance has never been measured and validated. In this paper, we present direct measurements of the spectral radiance transmittance in calm seas. The measurements were obtained by a customized instrument package equipped with two collocated radiometers. One radiometer measures the upwelling radiance just below the surface (L_u(0-)) while the other one directly records the water-leaving radiance (Lw) simultaneously. The ratio of measured L_wto L_u(0-) provides the transmittance. Our analyses suggest that the transmittance remains constant within ultraviolet and visible domain (350–700 nm) and is generally consistent with the theoretical approximations. In particular, the observed transmittance is within ±10% of the theoretical value for most portions of the spectral bands (350–600 nm). Within the red portion of the spectrum, the deviations are larger but are still less than 20%. The field observations suggest an optical closure is reached.

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