Slide 12nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

The GRAS SAF Project and The GRAS SAF Project and Aim of the User WorkshopAim of the User Workshop

Georg Bergeton Larsen

GRAS SAF Project ManagerAtmosphere Ionosphere Research Division (AIR)

Danish Meteorological Institute (DMI)Copenhagen

Slide 22nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

Outline of presentationOutline of presentation

• GRAS SAF Project overview and plans – Organisation of the project– Satellites and measurement system– Data products

• Aim of User Workshop

• Program

• Summary

Slide 32nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

GRAS SAF overview and plansGRAS SAF overview and plans

• GRAS SAF project started in 1999

– Operational facility for atmosphere products from GRAS instrument on Metop (Launch planned in late 2005)

– 5 year developments

• Partner Institutes

– Danish Meteorological Institute (Host institute)

– Met Office, UK

– IEEC, Spain

• Milestones

– 2000 Requirements review (User and science requirements)

– 2001 Requirements review (Design requirements)

– 2003 Mid-Term review (Critical design review)

– 2007 Operational products from GRAS SAF

Slide 42nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

GRAS SAF OrganisationGRAS SAF Organisation

EUMETSATDelegate Bodies

EUMETSATDelegate Bodies

EUMETSATSAF Network Manager

EUMETSATSAF Network Manager

GRAS Meteorology SAFSteering Group

GRAS Meteorology SAFSteering Group

GRAS Meteorology SAFProject Manager

G. B. Larsen, DMI

GRAS Meteorology SAFProject Manager

G. B. Larsen, DMI

DMISAF coordinatorK. B. Lauritsen

DMISAF coordinatorK. B. Lauritsen

IEECSAF coordinator

J. Aparicio

IEECSAF coordinator

J. Aparicio

Met OfficeSAF coordinator

D. Offiler

Met OfficeSAF coordinator

D. Offiler

Slide 52nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

GRAS measurement systemGRAS measurement system

• Level 1b product generation and dissemination by the EPS CGS

• Level 2 product generation and dissemination by the GRAS Meteorology SAF

• GRAS GSN provides GPS POD products and ground based measurements

• GRAS GSN network will contain 25 stations and will be based on existing networks

• Product archiving and off-line user access via UMARF in EUMETSAT

• Product archiving includes raw data, level 1b, level 2 and all GSN products

M etop

EPS Polar s ite

EU M ETSATEPS C G S

U SER S

G R ASM eteorology SAF

hosted by D M ILevel 2 products

G R AS G SN ServiceLevel 1b products

G PS systemO ccultation &

navigation

Tracking

Slide 62nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

Data products from the GRAS SAFData products from the GRAS SAF

• Data products (Level 2) in Near Real Time– Refractivity profiles– Temperature profiles– Pressure profiles– Water vapor profiles– Surface pressure– Geographical location

• Data products Offline– Reprocessed level 2 products – Bending angle (Level 1b)

• 1D-VAR pre-retrieval software (pre-existing)• 3/4D-VAR assimilation software• Error covariance matrix • Pre-processing tools

DMI, IEEC

Met Office

Slide 72nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

Aim of User WorkshopAim of User Workshop

• Present current developments and plans of the GRAS SAF to Users

• Get feedback on data products, software deliverables, distribution methods, etc.

• Confirm User Requirements

• Initiate local work at home institutes to use GRAS SAF products

• Strengthen scientific collaboration

Slide 82nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

GRAS/Metop User RequirementsGRAS/Metop User Requirements

Temperature Specific

Humidity Surface Pressure

Refractivity Bending

Angle Horizontal Domain

Global Global Global Global

Global

Horizontal Sampling 100–2000km

100 – 2000km

100–2000km 100–2000km 100–2000km

Vertical Domain

Sfc–1 hPa Sfc–100 hPa Sfc (msl) Sfc–1 hPa Sfc–80 km

Vertical Sampling

LT HT LS HS

0.3–3km 1–3 km 1–3 km 1–3 km

0.4–2 km 1–3 km

– –

– – – –

0.3–3 km 1–3 km 1–3 km 1–3 km

¦ ¦ ¦ 2–5 Hz ¦

Time Window 1–12 hrs 1–12 hrs 1–12 hrs 1–12 hrs 1–12 hrs

RMS Accuracy

LT HT LS HS

0.5–3 K 0.5–3 K 0.5–3 K 0.5–5 K

0.25–1 g/kg 0.05–0.2g/kg

– –

0.5–2 hPa – – –

0.1–0.5% 0.1–0.2% 0.1–0.2% 0.2–2%

¦ 1 rad ¦ or ¦ 0.4% ¦

Timeliness 1-3 hrs 1–3 hrs 1–3 hrs 1–3 hrs 1–3 hrs

Slide 92nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

ProgramProgram

• Opening & Welcome

• Thursday (June 12)– Radio Occultation Method

– Data Assimilation Technique

– EUMETSAT/GRAS SAF Products

– User Views on Products, Assimilation, and Climate Issues

• Friday (June 13)– Products From Current and Future RO Missions

– Discussion & End of User Workshop

Slide 102nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

SummarySummary

• GRAS SAF overview and plans

• Data products

• Software products for data assimilation

• Aim of User Workshop

• User requirements

• Program for the next days

• Expected number of atmospheric profiles per day 600

• Available to users from beginning of 2007

• Practical information

Slide 112nd GRAS SAF User Workshop, LO-skolen, Helsingør, June 11 -13, 2003

Presentations & Proceedings

Presentations: Please hand over an electronic version (PowerPoint or similar) of your presentation to one of the GRAS SAF team members during the workshop. All presentations will be made available at the workshop web pages.

Proceedings: Please email your paper to the DMI GRAS SAF team before july 1. We will perform a simple review (together with each author), and then send all papers to EUMETSAT, where an official proceedings booklet will be printed. The booklet will be sent to all participants around september/october.

Questions concerning proceedings: Contact Frans Rubek at frr@dmi.dk