Resolutions adopted by CIMO-XII
Casablanca, Morocco, 4 - 12 May 1998

Resolution 1 (CIMO-XII)

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting:

(1) Paragraph 7.13.5 of the general summary of the abridged final report of the Fifth WMO Congress,

(2) Resolution 2 (CIMO-XI) — Advisory Working Group,

Considering that a working group is of value in advising the president of the Commission and assisting him in his duties of coordination, planning and making decisions between sessions of the Commission,

Decides:

(1) To establish the Advisory Working Group of CIMO with the following terms of reference:

(a) To advise the president on all matters related to the work of the Commission and to assist in planning and coordinating the work of the Commission and its working groups;

(b) To review and improve the internal structure and working methods of the Commission;

(c) To assist in the preparation of the WMO Long-term Plan for IMOP;

(d) To monitor the implementation of the WMO Long-term Plan as appropriate;

(e) To arrange for the updating of the Guide to Meteorological Instruments and Methods of Observation;

(f) To guide and coordinate the Commission’s activities in the field of capacity building, education and training and on the role and functions of Regional Instrument Centres;

(g) To promote studies and implementation of quality control procedures for observational data;

(h) To advise the president on matters related to the cooperation with other Technical Commissions, Regional Associations and International Organizations;

(2) That the composition of the Advisory Working Group shall be as follows:

S. K. Srivastava (India) President of CIMO (chairperson);

R. P. Canterford (Australia) Vice-president of CIMO (vice-chairperson);

J. Nash (United Kingdom)*, J. P. van der Meulen (Netherlands)**, A. Belhouji (Morocco), R. Thomas (United States) and A. Gusev (Russian Federation);

Xu Baoxiang (China) as Co-rapporteur on Capacity Building;***

(Representative of RA III).

(3) To nominate Mr M. Diop (Senegal) as Co-rapporteur on Capacity Building.***

________

* As Chairman of the Working Group on Surface Measurements.

** As Chairman of the Working Group on Ground-based Upper-air Observing Systems.

*** The terms of reference are given in the annex to this resolution.

Annex to resolution 1 (CIMO-XII)

(a) To maintain effective liaison with regional Rapporteurs on Instrument Development, Related Training and Capacity Building in order to facilitate communications between CIMO and the Regional Associations on matters pertaining to capacity building in the field of instruments and methods of observation;

(b) To investigate, with reference to regional priorities, the needs for capacity building in the field of instruments and methods of observation, and to recommend activities for training and other assistance;

(c) To survey, with reference to regional priorities, existing training materials in the field of instruments and observations and advise on the need for revision or the preparation of new materials;

(d) To investigate the opportunities and resources (including those from manufacturers) for the use of the Internet and computer-assisted learning both for sharing expertise and for the training of instrument specialists;

(e) To survey the availability of reliable, low-cost types of surface instrumentation appropriate for use by developing countries, and to investigate advantageous procurement strategies;

(f) To establish a database on the experts, equipment and capabilities of Regional Instrument Centres (RICs) which can be made available to Members, and to develop recommendations for improving their operations;

(g) To propose means for collaboration and exchange of information, expertise and resources between RICs, particularly by exploiting Internet communications and learning tools;

(h) To ensure that relevant contributions of CIMO working groups and rapporteurs are communicated to RICs in order to support their work;

(i) To support the organization of a meeting of the Directors of RICs in the intersessional period, in order to promote collaboration and exchange of experience.

Resolution 2 (CIMO-XII)

WORKING GROUP ON SURFACE MEASUREMENTS

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting:

(1) The report of the chairman of the Working Group on Surface Measurements to CIMO-XII,

(2) The Fourth WMO Long-term Plan (4LTP) related to IMOP,

Considering:

(1) The need for data homogeneity and compatibility on a global basis,

(2) The increased need for the application of standardized techniques and methods of observation to meet the requirements of WMO Programmes in a cost-effective and reliable manner,

(3) That not all observational requirements have been met by automated measuring systems,

(4) The need for guidance on the development and/or implementation of automated observing systems by Members,

(5) The need for guidelines on meteorological instruments and methods of observation for developing countries,

Decides:

(1) To establish a Working Group on Surface Measurements with the following terms of reference:

(a) To review, evaluate, and propose intercomparisons of surface instrumentation;

(b) To review the state of the art of operational instrumentation and methods of observation and prepare reports of current performance under field conditions;

(c) To work closely with experts of other technical commissions, as required;

(d) To review advances in calibration methods and recommend calibration standards and procedures;

(e) To review and recommend algorithms for common use, including those for the reduction of data for observations of surface variables through automated systems;

(f) To enhance, where appropriate, guidance material available for Members planning the development or implementation of automated surface observing systems, particularly meteorological measurements for applications not yet covered by existing documents, and recommended functional and engineering specifications, testing methodologies, training for data interpretation by users, and other operationally-significant considerations;

(g) To review and update any guidance material related to instruments and methods of observation as may be required for developing countries;

(h) To monitor and actively support relevant work of international and regional bodies for standardization, such as the International Organization for Standardization (ISO), and to report on it;

(i) To provide support to the AWG in meeting its terms of reference, especially in the ongoing update of the Guide to Meteorological Instruments and Methods of Observation;

(2) To nominate, in accordance with Regulation 32 of the WMO General Regulations, the following experts:

J. P. van der Meulen (Netherlands), D. F. Molotsi (Botswana), Yufeng Hu (China), L. T. De Moreas (Brazil), D. W. Jones (United Kingdom), V. Nadolski (United States);

T. Práger (Hungary) as Rapporteur on Instrument Development;*

K. Behrens (Germany) as Rapporteur on Meteorological Radiation Measurements;*

J. Michaely (Israel) and B. Sevruk (Switzerland) as Co-rapporteurs on Point Precipitation and Evaporation Measurements;*

G. Pearson (Canada) as Rapporteur on Automation of Visual and Subjective Observations;*

K. Hegg (Norway) as Rapporteur on the Development and Implementation of Automated Observing Systems;*

J. Terpstra (Netherlands) as Rapporteurs on Road Meteorological Observations;*

________

* The terms of reference are given in the annex to this resolution.

M. Edwards (South Africa) (Representative of CAeM);

J. P. van der Meulen as chairperson of the Working Group;

and representatives of other technical commissions, as necessary;

(3) To request the chairperson of the Working Group to submit annual progress reports and a final report to the president of CIMO at least six months before the next session of the Commission.

Annex to resolution 2 (CIMO-XII)

The terms of reference of rapporteurs nominated under Resolution 2 (CIMO-XII) are as follows:

(1) Rapporteur on Instrument Development:

(a) To keep under review and report on developments in surface instrumentation, with particular reference to the needs of developing countries and applications in extreme environments;

(b) To provide guidance on how best to ensure that information on modern surface-based instrumentation is made available to Members;

(c) To provide guidance on the preparation of the Instrument Catalogue, if requested;

(d) To contribute to updating the relevant chapters of the sixth edition of the Guide to Meteorological Instruments and Methods of Observation, if needed.

(2) Rapporteur on Meteorological Radiation Measurements:

(a) To assist in the organization of global and regional pyrheliometer comparisons and in the preparation of their results;

(b) To monitor and to report on the development of absolute pyrheliometers;

(c) To review the practice of measuring and calibration techniques related to pyranometers, pyrheliometers, and long-wave radiometers, and to propose improvements for operational application;

(d) To review the need for and the technical feasibility of a WMO Long-wave Radiation Instrument Intercomparison and develop a proposal for its performance, and assist, if necessary, in organizing and carrying out such an intercomparison to be held in close collaboration with other related WMO Programmes;

(e) To review requirements of WMO Programmes for the measurement of solar radiation and to recommend appropriate action relevant to CIMO’s work;

(f) To monitor, in close cooperation with the World Radiation Centre, the work of Regional Radiation Centres and of the related regional rapporteurs with the objective of developing guidelines on stabilizing or improving measurements and calibrations, if necessary;

(g) To liaise between CIMO and the WCRP on matters related to the Baseline Surface Radiation Network (BSRN);

(h) To monitor the development in space-based remote sensing radiation observations and to report on them;

(i) To contribute to updating the relevant chapters of the sixth edition of the Guide to Meteorological Instruments and Methods of Observation, if needed.

(3) Co-rapporteurs on Point Precipitation and Evapotranspiration Measurements:

(a) To assist Members, if requested, by providing guidelines in the organization of National Evaporation Pan Intercomparisons;

(b) To support the organization of an expert meeting on rainfall intensity measurements and the organization of a related intercomparison, if needed;

(c) To report on the introduction of precipitation correction procedures;

(d) To develop further correction procedures based on simulations;

(e) To liaise with the WCRP Arctic Climate System Study (ACSYS) on observation of blowing snow and correction of precipitation measurements under Arctic and Antarctic conditions;

(f) To contribute to updating the relevant chapters of the sixth edition of the Guide to Meteorological Instruments and Methods of Observation, if needed.

(4) Rapporteur on Automation of Visual and Subjective Observations:

(a) To support the development and update of the definitions of meteorological phenomena for the purpose of measuring/determining and reporting them by automated systems, seeking consistency with previous definitions or practices, as appropriate;

(b) To monitor and to report on the development of automatic weather observing stations;

(c) To develop guidelines for the automation of visual and subjective observations and the assessment of automatic weather stations;

(d) To review requirements of WMO Programmes for automated visual and subjective observations and report on the technical feasibility of meeting these needs;

(e) To provide guidance to Members and instrument manufacturers on the automation of visual and subjective observations;

(f) To closely collaborate with experts from other technical commissions, especially CBS;

(g) To contribute to updating the relevant chapters of the sixth edition of the Guide to Meteorological Instruments and Methods of Observation, if needed.

(5) Rapporteur on the Development and Implementation of Automated Observing Systems:

(a) To assist in the initiation, organization and carrying out of a meeting of experts in implementation and use of AWS, including representatives of other commissions, such as CAeM, CCl, CAgM and CBS;

(b) To develop a process for redefinition of observations requirements from AWS, taking full account of users specifications;

(c) To support the development of appropriate reporting methods and codes to accommodate both automatic and conventional stations;

(d) To determine acceptable standards for AWSs from design to deployment;

(e) To contribute to updating the relevant chapters of the sixth edition of the Guide to Meteorological Instruments and Methods of Observation, if needed.

(6) Co-rapporteurs on Road Meteorological Observations:

(a) To liaise with other international bodies concerned with road meteorology and to examine the possibility of arranging with them an international workshop directed at defining the present state of the art and charting the way forward on road meteorological observations;

(b) To prepare guidance material in respect of the specifications for the measurement of meteorological variables for road meteorological purposes, which may include, inter alia, issues related to siting, exposure, data sampling and processing;

(c) To prepare, in collaboration with other relevant bodies if possible, a report which defines the consensus achieved, and sets out recommended observing methods, definitions and criteria, highlights the areas where there is a need for further discussion and agreement, and recommends how further progress might be made towards a widely acceptable set of observing practices for road meteorology;

(d) To consider, and if appropriate, propose to the president the drafting of a chapter on Road Meteorological Observations for adding to the Guide on Meteorological Instruments and Methods of Observation;

(e) To the extent possible, to seek resources from outside IMOP to carry out the work;

(f) To contribute to updating the relevant chapters of the sixth edition of the Guide to Meteorological Instruments and Methods of Observation, if needed.

Resolution 3 (CIMO-XII)

WORKING GROUP ON GROUND-BASED UPPER-AIR OBSERVING SYSTEMS

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting:

(1) The reports of the Co-chairmen of the Working Group on Upper-air Measurements, Subgroups on In Situ Measurements and on Remote Sensing to CIMO-XII,

(2) Resolution 4 (EC-XLVI) — Report of the eleventh session of the Commission for Instruments and Methods of Observation,

(3) Resolution 4 (Cg-XII) — Instruments and Methods of Observation Programme, and the Fourth WMO Long-term Plan (4LTP) — Part II, Volume 1, Programme 1.6 — IMOP,

Considering:

(1) The need to develop an integrated observing system that is cost-effective, and can meet the requirements of the operational and research user communities,

(2) The need for instrument experts to review the results of operational monitoring of data from the upper-air system in order to identify problems caused by systematic weaknesses in instrumentation,

(3) The need for compatibility of data from radiosondes with those from surface, aircraft and space-based remote-sensing systems,

(4) The need to followup, in close collaboration with CBS, issues related to frequency allocations for the operation of radiosondes and wind profilers,

Decides:

(1) To establish a Working Group on Ground-based Upper-air Observing Systems with the following terms of reference:

(a) To complete plans and procedures for the long-term quality assurance of all radiosonde measurements worldwide, including suitable laboratory evaluations of sensor performance as well as further national, bilateral or regional radiosonde comparisons;

(b) To assist in the planning and implementation of a tropical radiosonde comparison, including assistance in the development of suitable link radiosondes for comparison tests;

(c) To review progress in the development of GPS radiosondes and summarize national test results in guidance for Members;

(d) To develop procedures to improve the standardization of output from algorithms used in radiosonde data processing, including suitable standard raw data formats for flight simulation tests;

(e) To develop procedures for application of surface observations as regards the first radiosonde flight record;

(f) To review the performance of operational relative humidity sensors;

(g) To prepare guidance material on the use of automatic radiosonde launch systems;

(h) To prepare guidance material for manufacturers on priorities for future radiosonde system developments to meet requirements of Members;

(i) To review the quality of radiosonde and aircraft measurements on the GOS, to prepare recommendations for improving the homogeneity of the observations, and to provide advice on rectification of errors to Members, when requested;

(j) To liaise with the Rapporteur on Atmospheric Ozone Measurements regarding the operational use of ozonesondes;

(k) To review progress in ground-based remote sensing of upper-air variables and developments in the compatibility of remote sensing and conventional in situ observations;

(l) To prepare guidance material on the practical aspects of introducing and operating wind profilers in conventional observation networks;

(m) To provide support to the CIMO Advisory Working Group in meeting its terms of reference, especially in updating the Guide to Meteorological Instruments and Methods of Observation;

(n) To collaborate with other CIMO working groups and rapporteurs, other technical commissions and the AMDAR Panel, as required;

(o) To collaborate with CBS in dealing with issues relating to radiofrequency allocations for ground-based observing systems;

(2) To nominate, in accordance with Regulation 32 of the WMO General Regulations, the following experts:

J. Nash (United Kingdom), A. E. S. Amer (Egypt), Yatian Gua (China), R. C. Bathia (India), C. Bower (United States), A. Ivanov (Russian Federation);*

N. Mannoji (Japan), as Rapporteur on GPS-Derived Precipitable Water Content of the Atmosphere;*

J. Elms (United Kingdom), as Rapporteur on Radiosonde Data Compatibility Monitoring;*

D. Griersmith (Australia), as Rapporteur on the Calibration of Satellite Sounding Systems;*

B. Forgan (Australia), as Rapporteur on Atmospheric Turbidity Measurement;*

J. Dibbern (Germany), as Rapporteur on Wind Profilers;*

representatives of other technical commissions, as necessary;

representatives of manufacturers as observers, as appropriate;

J. Nash (United Kingdom) as chairperson of the working group.

(3) To request the chairperson of the working group to submit annual reports and a final report to the president of CIMO at least six months before the next session of the Commission.

________

* The terms of reference are given in the annex to this resolution.

Annex to resolution 3 (CIMO-XII)

The terms of reference of rapporteurs nominated under Resolution 3 (CIMO-XII) are as follows:

(1) Rapporteur on GPS-Derived Precipitable Water Content of the Atmosphere:

(a) To monitor and report on studies on the possible use and availability of GPS derived estimates of precipitable water content;
(b) To evaluate the quality of the related data;
(c) To promote standardization of methods of use of GPS derived data;
(d) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation.

(2) Rapporteur on Radiosonde Compatibility Monitoring:

(a) To evaluate the compatibility and accuracy of radiosonde geopotential height observations for all upper-air stations of the GOS, in close cooperation with the CBS Lead Centre on Upper-air Data Quality;
(b) To act as an information channel between the radiosonde data users, the national network managers, and the radiosonde manufacturers with regard to changes in radiosonde temperature correction procedures;
(c) To provide updated information on radiosonde systems as contained in the WMO Catalogue of Radiosondes and Upper-air Wind Systems in Use by Members, to be published regularly in the WWW Operational Newsletter;
(d) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation.

(3) Rapporteur on the Calibration of Satellite Sounding Systems:

(a) To participate in a study of the calibration of satellite remote sensing instrumentation, along with representatives of the CBS Working Group on Satellites, with the priority given to measurements of upper-air meteorological variables;
(b) To provide a report on the calibration of satellite remote sensing instrumentation;
(c) To review the reliability of methods used to link satellite measurements to the relevant meteorological variables, e.g. radiative transfer equations linking atmospheric temperature and atmospheric composition to satellite radiance observations;
(d) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation.

(4) Rapporteur on Atmospheric Turbidity Measurement:

(a) To support, if required, the organization of intercomparisons of instruments suitable for the determination of atmospheric turbidity;
(b) To review the need for and the feasibility of a workshop on the results of this instrument intercomparison with the aim to develop proposals on how best to proceed regarding the measurement of atmospheric turbidity;
(c) To support the standardization of related techniques and methods of observation;
(d) To closely monitor the development of non-filter radiometers and the development of a detector based traceability standard, for the development of aerosol optical depth measurement and to report on it;
(e) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation.

(5) Rapporteur on Wind Profilers:

(a) To inform on the status of wind profilers operationally used by Members;
(b) To monitor and report on national and regional profiler projects;
(c) To report on developments in data processing and quality control;
(d) To prepare for publication a practical guide on the use of wind profilers;
(e) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation.

Resolution 4 (CIMO-XII)

RAPPORTEUR ON WEATHER RADARS

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting:

(1) Resolution 4 (EC-XLVI) — Report of the eleventh session of the Commission for Instruments and Methods of Observation,

(2) The report of the Rapporteurs on Weather Radars to CIMO-XII,

(3) The rapid development in weather radars and associated data processing,

Considering:

(1) The necessity of keeping Members informed of developments in weather radar technology and its uses,

(2) The need for exchange of weather radar data between Members for various applications,

(3) That weather radars are important means for nowcasting and warning,

Decides:

(1) To appoint a Rapporteur on Weather Radars with the following terms of reference:

(a) To inform on the status of weather radars used by Members and on technology and algorithms operationally applied;

(b) To monitor and report on national and regional radar projects and radar networks;

(c) To monitor and report on studies and reports on the use of Doppler radars as a source of data to determine the three-dimensional wind distribution;

(d) To propose evaluation methods for operational Doppler radars, according to primary application;

(e) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation;

(f) To collaborate with the Working Groups on Surface Measurements and on Ground-based Upper-air Observing Systems, as appropriate;

(2) To invite O. Suzuki (Japan) to serve as Rapporteur on Weather Radars;

(3) To request the rapporteur to submit annual reports and a final report to the president of CIMO at least six months before the next session of the Commission.

Resolution 5 (CIMO-XII)

RAPPORTEUR ON UV MEASUREMENTS

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting:

(1) The report of the Rapporteur on UV Measurements to CIMO-XI,

(2) Users’ need for high quality and homogeneous long-term UV radiation data for various operational and research purposes,

Decides:

(1) To appoint a Rapporteur on UV Measurements with the following terms of reference:

(a) To assist in the organization of an international comparison of broadband, multi-filter and narrowband UV spectrometers, and the preparation of the final results;

(b) To review and report on the practice of measurement and calibration techniques related to all types of UV measurement instruments for the purpose of improving stability and accuracy;

(c) To liaise closely with the CAS Scientific Steering Committee on UV Measurements (SSC-UV);

(d) To prepare a report on the characteristics of UV radiometers and observational methods of measurement for inclusion in the Guide to Meteorological Instruments and Methods of Observation, following the completion of the relevant SSC-UV reports;

(e) To provide relevant information for keeping up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation;

(f) To collaborate closely with the Rapporteur on Atmospheric Ozone Measurements and, as necessary, with the Working Group on Surface Measurements;

(2) To invite B. McArthur (Canada) to serve as Rapporteur on UV Measurements;

(3) To request the rapporteur to submit annual progress reports and a final report to the president of CIMO at least six months before the next session of the Commission.

Resolution 6 (CIMO-XII)

RAPPORTEUR ON INSTRUMENTS AND METHODS OF ATMOSPHERIC COMPOSITION MEASUREMENTS

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting:

(1) Resolution 4 (EC-XLVI) — Report of the eleventh session of the Commission for Instruments and Methods of Observation,

(2) The report of the Rapporteur on Instruments and Methods of Atmospheric Composition Measurements to CIMO-XII,

(3) The Fourth WMO Long-term Plan related to IMOP,

Considering:

(1) The necessity of keeping Members informed of developments in instruments and methods of atmospheric composition measurements,

(2) That the Global Atmospheric Watch (GAW) network requires continuing support in the areas of instrument calibration, standardization of sampling and analysis techniques, observational techniques, and instrument development,

(3) That the monitoring of atmospheric composition is important to improve understanding of the state of the atmospheric environment, the relationship between the changes in atmospheric composition, and changes in climate and the natural cycling of chemical elements in the global atmosphere-ocean-biosphere system,

(4) That the monitoring of atmospheric composition requires data of high and assured quality,

Decides:

(1) To appoint a Rapporteur on Instruments and Methods of Atmospheric Composition Measurements with the following terms of reference:

(a) To keep abreast of the operation and needs of the GAW (and any other appropriate programmes) and to promote the development of instruments and techniques suitable for meeting these needs;

(b) To promote the quality of the measurement within GAW (and any other appropriate programmes) through guidance for:

(i) Total calibration procedures and instrument standardization;

(ii) Quality assurance practices and standards especially related to Quality Assurance and Quality Control Science Activity Centres;

(iii) Comparisons of instruments and of sampling and analysis techniques;

(c) To advise the president on matters related to the collaboration with the Commission for Atmospheric Sciences (CAS) and other bodies concerned;

(d) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation;

(2) To invite R. Artz (United States) to serve as Rapporteur on Instruments and Methods of Atmospheric Composition Measurements;

(3) To request the rapporteur to submit annual progress reports and a final report to the president of CIMO at least six months before the next session of the Commission.

Resolution 7 (CIMO-XII)

RAPPORTEUR ON ATMOSPHERIC OZONE MEASUREMENTS

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATIONS,

Noting:

(1) The report of the Rapporteur on Atmospheric Ozone Measurements to CIMO-XII,

(2) Resolution 7 (EC-XXXIX) — Global ozone research and monitoring,

(3) The abridged final report of EC-XLII — paragraphs 5.4.11 and 5.4.12 of the general summary,

Considering:

(1) The need to monitor changes of the ozone layer,

(2) The importance of ozone measurements for the study of many meteorological and climatological phenomena,

(3) The need to keep abreast of developments in the methods for measuring atmospheric ozone,

(4) The need for compatibility of ozone measurements arising from new instruments and methods of observation, including new ozonesondes,

Decides:

(1) To appoint a Rapporteur on Atmospheric Ozone Measurements with the following terms of reference:

(a) To report on comparisons of atmospheric ozone measuring instruments including surface-based and satellite-based instrumentation carried out under the WMO Global Ozone Research and Monitoring Project of GAW;

(b) To collate training material for surface-based and in situ ozone measuring instruments;

(c) To keep abreast of, and report on, developments in the measurement of atmospheric ozone;

(d) To keep up to date the relevant chapter of the Guide to Meteorological Instruments and Methods of Observation;

(e) To cooperate closely with the Rapporteur on UV Measurements;

(f) To liaise with the Working Group on Ground-based Upper-air Observing Systems;

(2) To invite V. Dorokhov (Russian Federation) to serve as Rapporteur on Atmospheric Ozone Measurements;

(3) To request the Rapporteur to submit annual progress reports and a final report to the president of CIMO at least six months before the next session of the Commission.

Resolution 8 (CIMO-XII)

REVISION OF THE RESOLUTIONS AND RECOMMENDATIONS OF THE COMMISSION
FOR INSTRUMENTS AND METHODS OF OBSERVATION

THE COMMISSION FOR INSTRUMENTS AND METHODS OF OBSERVATION,

Noting the actions taken on the recommendations adopted prior to its twelfth session,

Considering:

(1) That all resolutions adopted prior to its twelfth session are now obsolete,

(2) That all recommendations adopted prior to its twelfth session and still in force have been reconsidered,

Decides:

(1) Not to keep in force the resolutions adopted prior to its twelfth session;

(2) Not to keep in force the recommendations adopted prior to its twelfth session except:

Recommendation 4 (CIMO-XI) — Calibration of meteorological and related geophysical instruments

Recommendation 6 (CIMO-XI) — Improvement of instrumentation used in observing systems of developing countries

Recommendation 8 (CIMO-XI) — Correction of upper-air measurements

Recommendation 11 (CIMO-XI) — Organization of WMO Technical Conferences on Instruments and Methods of Observation

Recommendation 12 (CIMO-XI) — Education and training for capacity building

Recommendation 13 (CIMO-XI) — Intercomparisons of instruments

(3) That the contents of all relevant resolutions and recommendations confirmed by the Executive Council should be, as far as possible, be included in the Guide to Meteorological Instruments and Methods of Observation and, when this is realized, they should become obsolete.