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CRTM Working Group Report
Paul van Delst and Yong Han
Joint Center for Satellite Data Assimilation
JCSDA 7th Workshop on Satellite Data Assimilation
May 12-13, 2009
Members
• At the JCSDA– Yong Han, Paul van Delst, Quanhua Liu, Yong Chen, Banghua Yan,
Ron Vogel, David Groff, Tong Zhu, and Fuzhong Weng.
• Core Team Members– Ben Ruston (NRL), Zhiquan Liu (AFWA/NCAR), Emily Liu (GMAO),
Dan Birkenheuer (ESRL), and Ye Hong (NPOESS/Aerospace)
• Collaborating Team Members– Ralf Bennartz, Tom Greenwald (UWisc-Madison); Ping Yang (Texas
A&M); Jean-Luc Moncet, Vivienne Payne, and Alan Lipton (AER Inc.)
CWG Meeting #3, Jul2008• All parties provided updates of work since CWG #2, Apr2008.• Action Item summary:
– Respond to AER on spectroscopy priorities (P.van Delst and Y. Han). [Occurred after CWG#4]
– Address land MW desert emissivity bias (B.Yan and WZheng), produce new empirical emissivity (B.Yan). [Nearly complete – see CRTM poster]
– Investigate large CRTM Jacobians responsible for the large stratopause temperature increments at GMAO (Y. Chen and E. Liu).
– Address large ocean surface MW emissivity error at high frequency and any other outstanding bias issue in GFS (Q. Liu and B. Yan).
– Complete generation of FengYun-3 coefficients (Y. Chen and Y. Han).
– Improve User Guide. (P. van Delst). [Still needs much work!]
• Meeting minutes are downloadable at:https://svnemc.ncep.noaa.gov/trac/crtm/browser/trunk/doc/CWG/2008_07_31
CWG Meeting #4, Feb2009• Delayed due to focus on v1.2 release of CRTM here at JCSDA.• All parties provided updates of work since CWG #3, Jul2008.• Action Item summary:
– Obtain IPO cal/val report that includes updated ATMS instrument characterization (F. Weng).
– Contact T. Auligne (AFWA/NCAR) about adding cloudy radiance code to the appropriate CRTM version. (P. van Delst)
– Make CRTM historical releases available on CRTM ftp site. (P. van Delst)
– Add channel selection for CRTM processing and emissivity. (P. van Delst)
– Organize visit of T. Greenwald (UWisc) to the JCSDA to work on SOI integration. (P. van Delst)
– Discuss precipitation particle sizes with Z. Liu (AFWA/NCAR) (F. Weng)
– Coordinate discussion for continuation of AER funding. (Y. Han)
• Meeting minutes are downloadable at:https://svnemc.ncep.noaa.gov/trac/crtm/browser/trunk/doc/CWG/2009_02_05
CWG Communications
• A topic that was discussed at the last meeting was how to improve the level of communication amongst CWG members.
• Some of the recommendations:– One person to keep track of issues and touch base with each
individual group. (Split between PvD and YH)
– Bi-monthly contact with members.
– CWG shares JCSDA monthly highlights reports, or recent updates, amongst members.
• A bi-monthly email is now sent to the CWG mailing list detailing the activities of the JCSDA members.
• We still need to further improve communication amongst members, but need to determine best procedure without further burdening members (i.e. with yet more reporting requirements).
• New CRTM trac page may be useful?
CRTM Repository and trac SCM page
• The new, public, EMC subversion server is now online and operational. CRTM is one of the projects on that server.
• Authenticated users can now checkout code directly from the repository.
• For the first time, all JCSDA CRTM developers have access to the same repository.
• CWG members (and other users) can apply for server accounts and access.
• The server also uses the trac SCM tool:– Wiki
– Timelines and roadmaps/milestones
– Source browser with revision histories
– Ticketing system
• Use Wiki for information sharing amongst CWG members?
CRTM Wiki
CRTM Timeline
CRTM Roadmap
CRTM Browser
CRTM Ticket System
CRTM Testing Meeting, Apr2009
• With online repository, JCSDA members discussed testing procedures. Action items (none complete):– Automate the build and test of the CRTM (P. van Delst)
– For automation, only overall functional test to be used. Need to determine what needs to be added to that (All)
– Coordinate CRTM-in-GSI testing so that we end with a testing harness amenable to automation (Y. Chen and P. van Delst)
– Update CRTM Coding Review and Acceptance Guidelines (P. van Delst)
– Generic perturbation routines for testing (Volunteers?)
– Obtain a “bad” profile set for testing (Volunteers?)
– Input data sanitiser for the CRTM that is user selectable (P. van Delst)
• Decided to use a standard set of instruments for testing:– MetOp-A microwave and IR broadband instruments.
– MetOp-A IASI: 19 channels that correspond to the HIRS/4 central frequencies, plus channels 2463 and 5569 for trace gases.
CRTM URLs• CRTM trac page
https://svnemc.ncep.noaa.gov/trac/crtm
• CRTM repository (for checkouts, commits, etc)https://svnemc.ncep.noaa.gov/projects/crtm
• CRTM ftp siteftp://ftp.emc.ncep.noaa.gov/jcsda/CRTM
• CRTM Announcement mailing list:https://lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.emc.jcsda_crtm
• CRTM CWG mailing list:https://lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.emc.jcsda_cwg
• CRTM Developers mailing list:https://lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.emc.jcsda_crtm.developers