1. Document 5.4.1(3) Observing System Design and Evolution

2. Observing System Design and Evolution 1/5 (CBS-16-d05-4-1(3)-OSDE-draft1_en)
This document includes 3 proposed decisions and 3 proposed Recommendations
draft Decision 5.4.1(3)/1 — Translated versions of the Implementation Plan for the Evolution of Global Observing Systems (EGOS-IP);
Members and CBS Experts invited to assist
Secretary General to take appropriate action
OPAG-IOS to make sure next version of EGOS-IP will have appropriate status & disclaimer
draft Decision 5.4.1(3)/2 — Training on key OPAG-IOS issues;
Key OPAG-IOS Issues for which training is needed
Areas where CBS can provide support

3. Observing System Design and Evolution 1/5 (CBS-16-d05-4-1(3)-OSDE-draft1_en)
draft Decision 5.4.1(3)/3 — Improved support of Members to the implementation of Marine Meteorological and Oceanographic Observing Systems;
Requests the OPAG-IOS to consolidate the results of impact studies on ASAP
Urges Members to increase ASAP coverage and better contribute through JCOMM to the implementation of metocean observing systems
draft Recommendation 5.4.1(3)/1 — Standardization of observing systems installed on ships;
Recommends the Executive Council to request Members to collaborate in the European effort, for facilitating standardization of AWS systems and their observations installed on ships as well as the maintenance of such systems by the Port Meteorological Officers (PMOs)

4. Observing System Design and Evolution 3/5 (CBS-16-d05-4-1(3)-OSDE-draft1_en)
draft Recommendation 5.4.1(3)/2 — Impact assessment for observing system design and evolution;
Provides list of priority science questions
6 Surface-based science questions
3 space-based science questions
7 General science questions
Executive Council to request Members & NWP centres to contribute to impact assessment

5. Observing System Design and Evolution 4/5 (CBS-16-d05-4-1(3)-OSDE-draft1_en)
draft Recommendation 5.4.1(3)/3 — Study to be undertaken to analyse options for optimization of the upper-air observations programme of the GOS;
Refers to Action G10 of EGOS-IP requesting Members to “investigate possibility to optimize the radiosonde network in order to make the upper-air conventional observation coverage more uniform …”
Study Plan proposed by ET-SBO for potential change to the radiosonde network configuration based on complementarity optimization with AMDAR
Issue was considered at the Sixth WMO Workshop on the Impact of Various Observing Systems on NWP (Shanghai, China, May 2016), and workshop made two recommendations (i) specific scenarios for radiosonde schedule launch to be proposed, and (ii) recent field experiments (e.g. CMA) to be used for impact experiments

6. Observing System Design and Evolution 5/5 (CBS-16-d05-4-1(3)-OSDE-draft1_en)
draft Recommendation 5.4.1(3)/4 — Establishment and designation of the WMO Global Data Centre for Aircraft-Based Observations.
OPAG-IOS identified need for WMO Global Data Centre for Aircraft-Based Observations (GDC-ABO)
MADIS (USA) has capabilities to undertake functions of GDC-ABO
ICT-IOS-9 strongly supported & agreed in principle
Exchange of letters between WMO and USA with ToR & official US offer, subject to CBS-16 Recommendation and EC-69 approval
Terms of Reference
Liaise & agree with CBS expert teams on detailed operations & functions
Receive, QC & maintain database archive of all ABO obs & metadata
Make provision of archived ABO data & metadata to WMO Members according to data providers data policy
Develop & maintain a record of data quality issues associated with ABO data
To the extent possible, retrieve & backfill GDC-ABO database with available historical global data
Report to CBS on an annual basis
Recommend Executive Council to establish MADIS as GDC-ABO
Secretary General to develop MoU in collaboration with CBS