Overview

Agency, version?, Date 2012

Coordination Group for Meteorological Satellites - CGMSCoordination Group for Meteorological Satellites - CGMS

IROWG Report

Co-Chairs: Axel von Engeln (EUMETSAT), Dave Ector (UCAR)Rapporteur: Tony Mannucci (NASA/JPL)


Coordination Group for Meteorological Satellites - CGMS

Overview

• Action and recommendation item status• Cross-cutting items• Expert team meeting review and SCOPE-CM

RO-CLIM



CGMS-40 ActionsActionee Action # Description Deadline StatusWMO Plen IV.2 40.6 WMO to coordinate impact studies, through the CBS,

in order to update and refine its requirements for GNSS radio-occultation (e.g. number of occultations/day, distribution in space)

CGMS-41 OPEN

CGMS members

WGII 40.23 CGMS to convene through the IROWG an ad-hoc meeting on the global GNSS-RO constellation, inviting all interested CEOS agencies.

CGMS-41 OPEN

CGMS members

WGII R 40.22 CGMS members are invited to participate in the 3rd workshop of the International Radio Occultation Working Group, taking place near Graz, Austria from 5 - 11 September 2013. In particular, colleagues from China, India, Russia are invited to report on their radio occultation activities.

31-Jul-13 OPEN

CGMS members

WGII R 40.23 CGMS agencies should engage in reprocessing of radio/occultation data to maximize their utility in anchoring climate reanalyses.

CGMS-41 OPEN

CGMS members [IROWG]

WGIII R 40.41 CGMS, via the IROWG, to support the development and use of GNSS radio-occultation for ionospheric monitoring.

CGMS-41 OPEN



Plen 40.6 WMO to coordinate impact studies, through the CBS, in order to update and refine its requirements for GNSS radio-occultation (e.g. number of occultations/day, distribution in space)

• EUMETSAT is funding such a study in 2014 • General GPS RO denial experiments are

performed at all major assimilation centers, results will be presented at OPAC/IROWG-3



WG II R 40.23 CGMS to convene through the IROWG an ad-hoc meeting on the global GNSS-RO constellation, inviting all interested CEOS agencies

• Option to report early outcome of Action 40.6 at CEOS end 2014



WG II R 40.22 CGMS members are invited to participate in the 3rd workshop of the International Radio Occultation Working Group, taking place near Graz, Austria from 5 - 11 September 2013. In particular, colleagues from China, India, Russia are invited to report on their radio occultation activities

• China and Russia were invited to participate in the Scientific Committee of IROWG-3. Although no formal response was received on these invitations, three abstract from Chinese colleagues were submitted (from the Chinese Meteorological Administration and the Chinese Academy of Sciences). Discussions with India on a possible contribution on Megha-Tropiques are evaluated, including an ISRO visiting scientist visit to EUMETSAT prior to the 3rd workshop.

Recommendation



WG II R 40.23 CGMS agencies should engage in reprocessing of radio/occultation data to maximize their utility in anchoring climate reanalyses.

• Nothing to report

Recommendation



WG III 40.41 CGMS, via the IROWG, to support the development and use of GNSS radio-occultation for ionospheric monitoring.

• At IROWG-3 space weather sub-group meeting will discuss further steps

• Soliciting full international participation in the space weather sub-group at IROWG-3

IROWG-3: Sept 5-11 2013, Graz, Austria

Recommendation



CGMS-39 ActionsActionee Action Description Action feedback/closing

documentDeadline Status

IROWG 39.03 Action 39.03: IROWG to review the status of the global RO system and report to CGMS-40. Deadline: CGMS-40

EUM-WP-02 (on behalf of IROWG) CGMS-40 CLOSED

CGMS Members WGII 39.32 Action 39.32: CGMS agencies are encouraged to participate in the next International Radio Occultation Working Group (IROWG) Workshop to be held in Estes Park, Colorado 28 March - 3 April, 2012. Details can be found at www.irowg.org. Deadline: 01 March 2012

EUM-WP-01 (on behalf of IROWG) 1-Mar-12 CLOSED

Rapporteurs of International CGMS Science Working Groups

WGII 39.40 Action 39.40: GCOS Secretariat to clarify the request formulated in the GCOS/WCRP letter (dated 12 May 2010) and to ask for an adequate response as further spelled out in WMO-WP-23. Rapporteurs of the four CGMS Working Groups (IROWG, IPWG, ITWG and IWWG) are requested to put this on the agenda of the upcoming meetings of the four Working Groups and to report back to CGMS40 and the GCOS Secretariat. Deadline: CGMS-40

EUM-WP-01 (for IROWG) EUM-WP-14 (for IPWG)NOAA-WP-21 (for IWWG) NOAA-WP-18 (for ITWG). Action closed following discussions in WGII.

31-Aug-12 CLOSED

CGMS Rapporteurs

WGII 39.41 Action 39.41: CGMS requests the Rapporteurs to discuss, at the upcoming International Scientific Working Group meetings, the WG contributions to ECV production and reprocessing activities, and other relevant climate work. Deadline: CGMS-40

ISWG matters will be reported on in WGII and plenary F.2. Climate discussed in all ISWGs; CLOSED

CGMS-40 CLOSED



Status of the global Radio Occultation Observing System

• Data gap imminent• Strong user need for

gap filling• There are several gap

filling opportunities:• ROSA (OC-2, SAC-D,

MT; have data issues)• Jason-CS (RO invest.)• Planned commercial• Research satellites • Chinese FY-3X• Russian Meteor

• Will need further coordination

• > 10,000 occs/day in the long run

Low Lat Gap

High Lat Gap



Cross-Cutting Issues• The IROWG already brought forward recommendations to CGMS-40 regarding the

global radio occultation (RO) constellation. In particular, we asked for a GNSS-RO Continuity Plan, in order to move towards a fully operational constellation providing at least 10000 observations per day. Recent information on the COSMIC-2 funding situation appears to introduce a lot of uncertainty for such a future RO observing system, potentially opening up a mid- and high-latitude observation gap for several years. The IROWG would thus like to reiterate the need for a sustained future radio occultation capability.

• Seeing the great benefit of ISWG meeting and the high impact it has on international cooperation and exchange, the IROWG recommends to build up sustained funding for ISWG meetings.



WMO Expert Team Meeting ReviewSeventh Session, Geneva Switzerland 27-30 May 2013

Reports on the main activities of IROWG in the years 2012 up to early 2013

•IROWG organized its second workshop •IROWG was represented at the CGMS-40 meeting•The ROTrends group submitted a SCOPE-CM proposal “RO-CLIM”•Planning for the joined OPAC/IROWG-3 workshop



SCOPE-CM Proposal “RO-CLIM”• Title: Radio occultation based gridded climate data sets -

RO-CLIM• Main applicant: Axel Von Engeln, EUMETSAT• Participants: DMI, ECMWF, EUMETSAT, GFZ, Moog/BRE,

NASA/JPL, UCAR, U Graz/WEGC, UK Met OfficeNext steps (2014):• Increase maturity of CHAMP satellite data set (ROTrends)

– Profiles mid-tropo to stratosphere T, P, geopotential height

• New multi-satellite data set development• Report on activities in early 2015



Recap

• Action and recommendation item status• Cross-cutting items• Expert team meeting review and SCOPE-CM

RO-CLIM

Overview

Documents

cgms agencies

gnss radiooccultation

global gnssro constellation

opencgms memberswgii

chinese colleagues

irowg report cochairs

opencgms memberswgii40

scientific committee