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Radiosonde Transmitter Standardization in Europe

Radiosonde Transmitter Standardization in Europe. Ilkka Ikonen Vaisala Oyj Geneva 2006-03-20 – WMO Workshop on Frequencies. Legal issues.

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Radiosonde Transmitter Standardization in Europe

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  1. Radiosonde Transmitter Standardization in Europe Ilkka Ikonen Vaisala Oyj Geneva 2006-03-20 – WMO Workshop on Frequencies

  2. Legal issues • Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on Radio Equipment and Telecommunications Terminal Equipment and the mutual recognition of their conformity (R&TTE Directive) • Apparatus put into service in the Member States (of EU) shall be submitted into the conformity assessment (of the essential requirements in the Article 3) • Manufacturer has the responsibility to show that apparatus comply with this directive and are properly marked • One method to show the conformity is harmonized standards.

  3. Article 3, Essential requirements R&TTE Directive 1999/5, of the Article 3, point2 reads: 2. In addition, radio equipment shall be so constructed that it effectively uses the spectrum allocated to terrestrial/space radio communications and orbital resources so to avoid harmful interference This is in accordance with ITU and WMO incentives to improve spectral usage of radiosondes.

  4. Practical Issues • One method to show the conformity with the RTT&E directive is a harmonized standard. • Apparatus meeting the appropriate standards shall bear CE marking. • Only CE marked apparatus are legal in EU. • ETSI gives a public forum to perform the standardization task in Europe – to create an EN (European Norm).

  5. ETSI(European Telecommunications Standard Institute) • ETSI is officially responsible for standardization of Information and Communication Technologies (ICT) in Europe. • ETSI is officially recognized by the European Commission and the EFTA secretariat. • ETSI ensures that harmonised standards are drafted in a way, which allows unambiguous interpretation and can be appropriately updated when needed.

  6. Why one needs specific radiosonde transmitter standard ? • To comply with the R&TTE Directive 1999/5, and to show the conformity of the Article 3 • To avoid the application of the SRD standard EN300 220 SRD on radiosondes: • SRD standard does not fit to radiosondes • There have been continuos changes to the EN300 220 • To take into account the radiosonde special features: • High dynamic range in the reception power, • Wide temperature range, • Radiosonde is a disposable product.

  7. Standardization process • All interested parties are welcome to participate task groups (ERM – TG xx) within ETSI to prepare standards (ERM = Electromagnetic compatibility and Radio spectrum Matters) • TG25 for 1680 MHz • TG28 for 400 MHz • TGs report to ERM that accept the work done, and sends it to the public inquiry and voting. • After the ETSI process, standards will be issued to the community in the EU official publication (harmonized). • Accredited notified body issues CE marking.

  8. Standardization process - history Standardization of the 400 MHz transmitter • ETSI working group ERM-TG28 – SRD devices • Work started early 2000 • Accepted by ERM early 2003 • Standard is EN 302 054 Standardization of the 1680 MHz transmitter • ETSI working group ERM-TG25 - Aviation • Work started early 2004 • Accepted to public inquiry – 2006-02-22 • Standard is EN 302 454 – estimated to be harmonized by late 2006

  9. ETSI EN Approval - Notification of new PE 20060623 for TB Officials & Work Item Rapporteurs • Dear Madam, dear Sir, • Please note that the above mentioned Public Enquiry containing the following document(s) is now open. • Please check the bottom of this email for instructions. • ------------------------------------------------------------------------------------------ • ETSI EN 302 454-1 V1.1.1 (2006-02) (35 paper pages/0 soft pages) • Public Enquiry: PE 20060623 Start: 2006-02-22 End: 2006-06-23 • Technical Body: TG ERM TG25 • ERM Aeronautical • Title: • Electromagnetic compatibility and Radio spectrum Matters (ERM); • Meteorological Aids (Met Aids); • Radiosondes to be used in the 1 668,4 MHz to 1 690 MHz frequency range; • Part 1: Technical characteristics and test methods • ------------------------------------------------------------------------------------------ • ETSI EN 302 454-2 V1.1.1 (2006-02) (14 paper pages/0 soft pages) • Public Enquiry: PE 20060623 Start: 2006-02-22 End: 2006-06-23 • Technical Body: TG ERM TG25 • ERM Aeronautical • Title: • Electromagnetic compatibility and Radio spectrum Matters (ERM); • Meteorological Aids (Met Aids); • Radiosondes to be used in the 1 668,4 MHz to 1 690 MHz frequency range; • Part 2: Harmonized EN covering essential requirements under article 3.2 of the R&TTE Direc • ------------------------------------------------------------------------------------------ • To download any of the above items in Word or PDF Format, please go to : • http://webapp.etsi.org/ENApproval/Home.asp?T=PE&S=OPEN&N=20060623&pTB_ID_LIST=581 • For more information/help on accessing or using the Voting System, you can contact us by sending an e-mail to: • mailto:webvote-contact@etsi.org • All Publications can also be found under: • http://pda.etsi.org/PDA/ • Best Regards, • The Editing Document Management Team • ETSI - Standards Production Area

  10. What do the standards cover ? • Essential is that different make radiosondes are tested in the same way and same criteria are applied for acceptance. • Transmitter standard covers: • Test conditions • Equipment used in testing • Measurement uncertainties • Methods of measurement • Limits and values for essential transmitter properties

  11. What do the standard not cover ? • Radiosonde transmitter standards cover only test methods and spectrum usage issues. • Excluded from transmitter standardization are: • Quality of the product • Performance issues (other than spectrum related) • Modulation (but the standard covers digital modulation only) • Data transfer speed • Data contents and format • Receiving system properties and performance

  12. General Issues • Radiofrequencies are limited resources, and shall be divided fairly among the users and used respecting others’ applications • Harmful interference to others shall be avoided • The European R&TTE Directive 1999/5 urges the “good use” of the radiofrequencies • The standards are commonly agreed upon way to meet the need of the “good use” • To meet the laws and regulations make meteorological community a fair and respected player in the field • Radiosondes are not the only need of the meteorology • Meteorology respects others and count on others’ respect in turn

  13. THANK YOU FOR YOUR ATTENTION

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