Radiosonde transmitter standardization in europe
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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


Radiosonde transmitter standardization in europe

  • 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


Radiosonde transmitter standardization in europe

THANK YOU FOR YOUR ATTENTION


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