The Radiocommunication Data Dictionary (RDD) ITU-R SM.1413

1. The Radiocommunication Data Dictionary (RDD)ITU-R SM.1413 Presented by David Barrett

2. Presentation Overview • Theobjectives of the RDD • An introduction to the contentsof the RDD • Future development • Converting the RDD into MS Access (by Mr Neelesh Kulkarni) • The Reference Database (by Mr Fabrice Evangelisti)

3. The RDDcontains • all the data required for the international filing process • clear and consistent descriptions of the data and its format • definition of the conditions of use by radio system(s) • identification of notification process constraints

4. The RDDprovides • a tool forimproving the exchange of data between administrations and between administrations and the Bureau • a tool that can be used to improve aspects of the international filing process by providing: • data validation rules (more to be added) • an opportunity for administrations to review and propose the rationalisation of duplicated and redundant data

5. The RDD enables • identification of individual data items • the structure of the data to be presented • administrations to overcome the problems of • diversity of terminology and concepts across frequency bands and Services • inconsistent and incomplete definitions located in many different documents

6. The RDD assists • development of more comprehensive validation tools • development of forms and Circular Letters • staff training • mapping national databases to the international data requirements • overcoming problems for staff not working in their own language

7. RDD Contents • Section 1:Introduction • Section 2:Terrestrial Notification Data • Section 3:Description of Terrestrial Data Items • Section 4:Space Advance Publication, Notification and Coordination Data • Section 5:Description of Space Data Items • Section 6:Data Item Formats • Section 7:Diagrams • Section 8:Cross-Reference Tables between RR Appendix S4 and RDD • Section 9:Appendices • Section 10:Data Item Reference Index

8. Example Data Item ·Apogee Altitude RDD ref: S098 The longest distance from a point on the Non-geostationary Orbitto the sub-satellite point on the Earth’s surface. For the purpose of this measurement the Earth is considered to be a spherical body with no height variation and a nominal radius of 6378 km. The sub satellite point is the point on a line between the apogee and the Earth’s centre where it passes through the earth’s surface. The term “apogee” is commonly used when the Earth is the reference body and may vary if a different reference body is used e.g. “aphelion” when the reference body is the sun. A more generic term that may also be used is “apoapsis”. Format: Integer (in the range 500 to 99999999) in km.

9. Example Data Group Administration RDD ref: S001 A governmental department, or service, of a member state of the ITU responsiblefor discharging the obligations undertaken in the Constitution, the Conventionand the Regulations of the ITU.  An Administration is identified by its Code. An Administration may be party to one or more Coordination Agreements RDD ref: S002 An Administration may submit one or more Correspondence AddressesRDD ref: S006

10. Example Section 4 Data Sheet

11. Future plans for development • updating to include changes introduced at WRC2000 • expansion of the Data Validation Rules • improved guidance • inclusion of the Bureau findings • introduction of hyperlinks