1. ET-ABO 1 st Session 10-13 th September 2013, WMO, Geneva Commission for Instruments and Methods of Observation (CIMO) Task Team – Aircraft-based Observations (TT-AO) Stewart Taylor, Chair TT-AO

2. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 1 CIMO http://www.wmo.int/pages/prog/www/CIMO/WorkingStructure/membership.html One of eight technical commissions within WMO, Composed of designated experts, In the CIMO structure, TT-AO sits in the Open Programme Area Group (OPAG) on Standardisation and Intercomparisons – Task Team A5. Small Team of seven with assistance from SO/ARO.

3. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 2

4. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 3 Greg MEYMARIS NCAR Research Applications Laboratory Aviation Applications Program

5. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 4 CIMO TT-AO Terms of Reference (TOR). Develop and manage the work plan and associated activities of the TT-AO, as well as the budget for the corresponding expenditure of the AMDAR Trust Fund in line with the Trust Fund’s Terms of Reference, in collaboration with CBS ET- Aircraft-Based Observations; Oversee the scientific and technical development and maintenance of aircraft- based observing systems, from a point of view of instruments and methods of observation, and inform the Commission of latest developments; Work closely with ET-A1 in conducting the development and maintenance of technical standards associated with aircraft-based observations, and provision of related specifications to meet user requirements; and, Provide the technical review of approved aircraft-based humidity capabilities, Liaise closely with ET-A3 for testing and validation of the AMDAR system and aircraft based humidity sensors; Provide input for updates of the CIMO Guide relevant to aircraft-based observations, including identification of standards for inclusion in the CIMO Guide and other WMO regulatory documents; Assist and provide support for training and outreach activities to support the use of aircraft-based observations.

6. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 5 CIMO TT-AO Workplan.Workplan. Work Plan and associated budget approved May 2013. 18 defined tasks, each one: –Assigned to TOR, –Assigned responsibilities to TT Members, –Actions envisaged, –Deliverables, –Start and completion dates, –Status – each task is recorded on Task Planning Summary documents, –Includes associated budget costs.

7. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 6

8. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 7 Status of Tasks (Sep 2013): Completed – 7, 9 Ongoing – 1, 2, 18 Updated – 4, 5, 10, 11, 13, 16 Needing to be updated – 3, 6, 8, 15 To be commenced/populated – 12, 14, 17

9. GIE/EIG EUMETNET, Registered Number 0818.801.249 - RPM Bruxelles CIMO TT-AO 8 Meetings (Held and Planned): –TT-AO Webex 1, 1 st July 2013, –TT-AO Webex 2, 20 th Aug 2013, –Chair TT-AO attend ET-ABO Session 10-13 th Sep 2013, –TT-AO Webex 3, 26 th Sep 2013 (update of Task Sheets) –Updated Work Plan, by Nov 2013 (drafted and agreed), –TT-AO Session 1, Jan/Feb 2014 (provisional TBC). To be held before CIMO MG Meeting (Feb 2014).