1. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS IROWG Report Co-Chairs: Axel von Engeln (EUMETSAT), Dave Ector (UCAR) Rapporteur: Tony Mannucci (NASA/JPL)

2. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS Overview Action and recommendation item status Cross-cutting items Expert team meeting review and SCOPE-CM RO-CLIM

3. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS CGMS-40 Actions ActioneeAction#DescriptionDeadlineStatus WMOPlen IV.240.6WMO 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-41OPEN CGMS members WGII40.23CGMS to convene through the IROWG an ad-hoc meeting on the global GNSS-RO constellation, inviting all interested CEOS agencies. CGMS-41OPEN CGMS members WGII R40.22CGMS 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-13OPEN CGMS members WGII R40.23CGMS agencies should engage in reprocessing of radio/occultation data to maximize their utility in anchoring climate reanalyses. CGMS-41OPEN CGMS members [IROWG] WGIII R40.41CGMS, via the IROWG, to support the development and use of GNSS radio-occultation for ionospheric monitoring. CGMS-41OPEN

4. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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

5. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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

6. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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

7. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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

8. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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

9. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS CGMS-39 Actions ActioneeActionDescriptionAction feedback/closing document DeadlineStatus IROWG39.03Action 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-40CLOSED CGMS MembersWGII 39.32Action 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-12CLOSED Rapporteurs of International CGMS Science Working Groups WGII 39.40Action 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-12CLOSED CGMS Rapporteurs WGII 39.41Action 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-40CLOSED

10. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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

11. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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.

12. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS WMO Expert Team Meeting Review Seventh 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

13. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS 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 Office Next 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

14. Agency, version?, Date 2012 Coordination Group for Meteorological Satellites - CGMS Recap Action and recommendation item status Cross-cutting items Expert team meeting review and SCOPE-CM RO-CLIM