Working Schedule for Slant-path delay in IUM

(Draft prepared by Yong-Run Guo, 12 January 2011)

Tasks

1, Implement the simple observation operator of (straight-line) slant-path total delay (STD) in WRFVar to assimilate the data from BMB ground-based GPS network

2, Get the results comparable to and better than those from ZTD assimilation for the selected cases in Beijing area

3, Start to upgrade the forward observation operator by using ray-tracing approach

Basic working schedule for year of 2011

By 15 February 2011	obsproc	FM-115 for STD, place the zenith angle in “height field”
By 15 March 2011	WRFVar	Improve “da_get_innov_vector_gpssdelay.inc” Modify the related codes in da_obs_io and da_obs directories Calculate (O-B) for one case with the real STD obs
By 15 April 2011	(O-B) statistics	Compute the statistics for different zenith angle and azimuth angle.
By 31 May 2011	Tangent linear and adjoint	Develop the tangent-linear and adjoint code of the observation operator
1 June to 31 August 2011	Zhong visit NCAR	Report the statistics of BMB network STD data Continue develop the codes for STD assimilation in WRFVar Obtain the preliminary STD assimilation results.
1 September to 31 October 2011	Tuning STD obs errors	Tuning the STD obs errors Consider the STD obs error correlation
Early November 2011	Guo visit IUM a week	Review the STD work with WRFVar
31 December 2011	Report	Write a report for STD assimilation with WRFVar.