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Overview

IROWG Report Co-Chairs: Axel von Engeln (EUMETSAT), Dave Ector (UCAR) Rapporteur: Tony Mannucci (NASA/JPL). Overview. Action and recommendation item status Cross-cutting items Expert team meeting review and SCOPE-CM RO-CLIM. CGMS-40 Actions.

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Overview

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  1. IROWG ReportCo-Chairs: Axel von Engeln (EUMETSAT), Dave Ector (UCAR)Rapporteur: Tony Mannucci (NASA/JPL)

  2. Overview • Action and recommendation item status • Cross-cutting items • Expert team meeting review and SCOPE-CM RO-CLIM

  3. CGMS-40 Actions

  4. 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. 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. WG II R 40.22CGMS 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 Recommendation • 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.

  7. WG II R 40.23CGMS agencies should engage in reprocessing of radio/occultation data to maximize their utility in anchoring climate reanalyses. Recommendation • Nothing to report

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

  9. CGMS-39 Actions

  10. 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. 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. 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

  13. 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. Recap • Action and recommendation item status • Cross-cutting items • Expert team meeting review and SCOPE-CM RO-CLIM

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