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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

Radiosonde Transmitter Standardization in Europe

Ilkka Ikonen

Vaisala Oyj

Geneva 2006-03-20 – WMO Workshop on Frequencies

legal issues
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.
article 3 essential requirements
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.

practical issues
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).
etsi european telecommunications standard institute
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.
why one needs specific radiosonde transmitter standard
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.
standardization process
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.
standardization process history
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
slide9
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:[email protected]
  • All Publications can also be found under:
  • http://pda.etsi.org/PDA/
  • Best Regards,
  • The Editing Document Management Team
  • ETSI - Standards Production Area
what do the standards cover
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
what do the standard not cover
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
general issues
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
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