Test of a non-local excess phase delay operator for GPS radio occultation data assimilation

Hui Shao; Xiaolei Zou; George A. Hajj

doi:10.1117/1.3094060

1 February 2009 Test of a non-local excess phase delay operator for GPS radio occultation data assimilation

Hui Shao, Xiaolei Zou, George A. Hajj

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 3, Issue 1, 033508 (February 2009). https://doi.org/10.1117/1.3094060

Abstract

A physically-sound, non-local excess phase delay observation operator is developed for simulating excess phase delay measurements from GPS radio occultation (RO) missions. By approximating an observed ray by a straight line, the refractivity gradient information along an observed ray path is included in the simulated excess phase delay. This observation operator is used to simulate observations from the German CHAllenging Minisatellite Payload (CHAMP) RO mission based on large-scale analysis. The need to use such an observation operator for GPS RO data assimilation in spherically asymmetric regions is shown by results from a set of forward simulation and data assimilation experiments. A modification that renders the non-local excess phase delay observation operator more suitable for parallel implementation of GPS RO data assimilation is proposed.

Citation Download Citation

Hui Shao, Xiaolei Zou, and George A. Hajj "Test of a non-local excess phase delay operator for GPS radio occultation data assimilation," Journal of Applied Remote Sensing 3(1), 033508 (1 February 2009). https://doi.org/10.1117/1.3094060

Published: 1 February 2009

ACCESS THE FULL ARTICLE

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