AMOSSG/5-SN No. 6

Appendix

APPENDIX

LIST OF TASKS FOR FUTURE WORK OF THE AERODROME METEOROLOGICAL OBSERVING SYSTEMS STUDY GROUP (AMOSSG)

The AMOSSG is envisaged to assist the Secretariat in pursuing the specific tasks as follows:

task No.	relevant anc task no.	task	reference	estimated date for completion	note on progress
1.	MET-9206	Consider the need for provisions concerning the display of cloud base height in ATS units	EANPG/44	Amendment 74	Draft amendment for AMOSSG/5
2.	MET-9206	Consider the need for provisions or guidance material to cater for the reporting of gusts in the calculation of crosswind and tailwind	EANPG/44	Amendment 74	Draft amendment for AMOSSG/5 if necessary
3.	MET-9206	Study the expansion of the use of fully automated observations during operational hours	MET Div Rec 2/3	Amendment 74	Draft amendment at AMOSSG/5
4.	MET-9206	Monitor the use of modern observing techniques (e.g. remote sensing)

AMOSSG/1 – SoD,

4.4.1 a);

4.4.3	Ongoing	Proposals, as necessary, expected for AMOSSG/5
5.	MET-9206	Revise the weather phenomena to be reported under "present weather" and "recent weather"	AMOSSG/1 – SoD,

5.3.1 c)	End 2004	To be re-addressed at AMOSSG5
6.	MET-9206	Finalize the assessment of the capability of AWS to meet the expected future requirements

AMOSSG/1 – SoD,

6.2.2 b)	Ongoing	Assessments carried out at all meetings
7.	MET-9206	Revise the definition of "VC"

AMOSSG/1 – SoD,

5.3.1 d)	Amendment 74	Draft amendment at AMOSSG/5
8.	MET-9206	Update the attainable accuracy of observation and measurement in Annex 3, Attachment A	ANC 153-9	Amendment 74	A proposal from WMO for AMOSSG/5
9.	MET-9206	Prepare guidance material	AMOSSG/1 – SoD,

5.3.1 e)

MET Div Rec 2/2	2004	Comments by end October 2003
10.	MET-0101	Enable the use of the BUFR code form for the dissemination of METAR/SPECI and TAF	MET Div 2/5	Initial phase Amendment 74, completion Amendment 76	WMO plan, enabling clause for AMOSSG/5
11.	MET-0403	Monitor States' progress in forecasting RVR	COM/MET/82, MET/AOP PT Eur Region	Ongoing	Depends upon input from States and MET/AOP PT
12.	MET-0403	Update the desirable forecast accuracy and amend Attachment B to Annex 3 if necessary	ANC 136-18	Amendment 74	Awaiting response from WMO
13.	MET-0403	Study the operational feasibility and desirability of requiring a greater accuracy in the first 3 hours of a TAF, possibly by limiting the use of PROB	ANC 137-16	Amendment 74	To be discussed at AMOSSG/5
14.	MET-0403	Consider the need for harmonizing the criteria for issuance of SPECI and those for including change groups in TAF	MET Div Rec 2/3	Amendment 74	Draft amendment at AMOSSG/5
15.	MET-0403	Review the validity period for TAF	EANPG/45	Amendment 74	To be discussed at AMOSSG/5