National campaign to measure non ionizing radiation from radio installations
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ITU Regional Standardization Forum for Africa (Kampala, Uganda, 23-25 June 2014). NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM RADIO INSTALLATIONS. DALLY Brice Landry Technical Director VALSCH Consulting Côte d’Ivoire [email protected] CONTENT OF PRESENTATION.

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NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM RADIO INSTALLATIONS

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National campaign to measure non ionizing radiation from radio installations

ITU Regional Standardization Forum for Africa

(Kampala, Uganda, 23-25 June 2014)

NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM RADIO INSTALLATIONS

DALLY Brice Landry

Technical Director

VALSCH Consulting Côte d’Ivoire

[email protected]


Content of presentation

CONTENT OF PRESENTATION

  • CONTEXT

  • TERMS OF REFERENCE

    • MISSION OBJECTIVES

    • SCOPE OF ACTIVITY CONDUCTED

    • ANTICIPATED DURATION

    • EXPECTED DELIVERABLES

  • IMPLEMENTATION AND RESULTS OF MISSION

  • CONCLUSION AND RECOMMENDATIONS


Context

CONTEXT

Within the framework of its control mission and its 2012 activities, ATCI (now restructured to form ARTCI and AIGF pursuant to Decree No. 2012-293 of 21 March 2012 on Telecommunications and Information and Communication Technologies) chose the company VALSCH Consulting to support it in carrying out a National Campaign to Measure Non-Ionizing Radiation from Radio Installations.

This presentation provides an overview of the terms of reference of the 2012 measurement campaign and a synthesis of the results obtained.


Terms of reference

TERMS OF REFERENCE

  • MISSION OBJECTIVES

    • Evaluate the levels of exposure of populations to electromagnetic fields;

    • Check the compliance of populations’ exposure levels with normative requirements (exposure limits);

    • Map the field strength levels.


Terms of reference1

TERMS OF REFERENCE

  • SCOPE OF ACTIVITY CONDUCTED

    The mission was dimensioned so as to cover 122 measurement points divided into two (2) groups spread over 22 Côte d’Ivoire communes.

GROUP II

GROUP I

NUMBER OF POINTS

NUMBER OF POINTS

TOTAL NUMBER OF MEASUREMENT POINTS

TOTAL NUMBER OF MEASUREMENT POINTS

Table 1: Distribution of measurement points by group and by commune


Terms of reference2

TERMS OF REFERENCE

  • DURATION OF MISSION

  • Eight (08) weeksbroken down as follows:

    • Six (06) weeks of research in the field;

    • Two (02) weeks of data processing and analysis.

  • NORMATIVE REFERENCES

    • CENELEC standard (EN 50492): Basic standard for the in-situ measurement of electromagneticfieldstrengthrelated to humanexposure in the vicinity of base stations.


Terms of reference3

TERMS OF REFERENCE

Choice of location

Analysis of location

Global evaluation of exposure

Broadband measurement

<−3 V/m

Detailed evaluation of exposure

Result of measurement

Choice of location

<3 V/m

Selective measurement

Informative evaluation of field strength levels by service

Extrapolation

Measurement by service integration

Determination of measurement uncertainty

Elaboration of measurement report

Figure 1: Flowchart of measurement process


Terms of reference4

TERMS OF REFERENCE

  • International Council on Non-Ionizing Radiation Protection (ICNIRP) guidelines on exposurelimits for the general public and workers – 1998.

Frequencyrange

Equivalent plane wavepower densitySeq

(W/m2)

Table 2: Formula for calculating the reference levels set by ICNIRP


Terms of reference5

TERMS OF REFERENCE

  • EXPECTED DELIVERABLES

Table 3: Summary of expected deliverables


Implementation and results of mission

IMPLEMENTATION AND RESULTS OF MISSION

  • IMPLEMENTATION

    • ORGANIZATION AND WORKING METHOD

      A steering committee and field follow-up team were established in order to ensure that the mission was carried out in the required manner.

      Seventeen (17) high-level ressources (engineers, technicians and legal experts) were employed operationally within the framework of this mission.


Implementation and results of mission1

IMPLEMENTATION AND RESULTS OF MISSION

The ressources worked from 2 January to 26 February 2013 in physical meetings and conference calls, addressing the start-up, progress made, refocusing, and winding up of the mission.

  • SCOPE OF ACTIVITIES CONDUCTED

    In accordance with the initial distribution in the terms of reference, 122 points were indeed measured.


Implementation and results of mission2

IMPLEMENTATION AND RESULTS OF MISSION

  • CHOICE OF MEASUREMENT POINTS

    Eligibility conditions

  • Density of radio installations;

  • Sensitivity of location (area of conflict with local populations, school, hospital,….);

  • Busy area;

  • Public accessibility (indoor/outdoor)

  • Global exposure level

    (> 0,3 V/m).

Restricted

access

area

Area open togeneral

public

Prohibitedarea

Signage

for

general

public

Figure 2: Concept of area and

of signage


Implementation and results of mission3

IMPLEMENTATION AND RESULTS OF MISSION

  • Consultation of database

  • Based on ATCI’s distribution of the measurement points over all the communes selected, VALSCH Consulting proceeded as follows:

  • Mapped the location of 3632 multi-technology (GSM, WiMAX and UMTS) radio sites in operation;

  • Identified locations with a high density of radio sites;

  • Divided the mapping up intoseveral areas;

  • Consulted the database of complaints.


Implementation and results of mission4

IMPLEMENTATION AND RESULTS OF MISSION

Research (in situ)

  • Visual identification coupled with rapid analysis using broadband field metre for each candidate measurement point;

  • Competitive selection between three (3) candidates per measurement point retained.


Implementation and results of mission5

IMPLEMENTATION AND RESULTS OF MISSION

Figure 3 : National mapping of measurement sites

Figure 4 : Mapping of measurement sites Abidjan district

Measurement points:

Classroom, kindergarten, hospital room, privateresidence, market, café, public areas


Implementation and results of mission6

IMPLEMENTATION AND RESULTS OF MISSION

  • MEASURING EQUIPMENT

Figure 5 : Broadband measurement station

Figure 6 : Selective measurement stations


Implementation and results of mission7

IMPLEMENTATION AND RESULTS OF MISSION

Table 4: Composition of measurement chain N°1

Table 5: Composition of measurement chain N°2


Implementation and results of mission8

IMPLEMENTATION AND RESULTS OF MISSION

PARAMETERIZATION OF STATIONS IN ACCORDANCE WITH CENELEC 50492

  • Detection mode;

  • Measurement mode;

  • Resolutionbandwidth (RBW);

  • Videobandwidth (VBW).


Implementation and results of mission9

IMPLEMENTATION AND RESULTS OF MISSION

  • RESULTS

In light of the values obtained in the broadbandmeasurements (all below 3 V/m) and in accordance with the measurementprocessflowchart, no detailedmeasurementwaseffected.

All the measurementswereeffectedwith a view to making an informative evaluation of the fieldstrengthlevels by service.

Thus, the channel power wasprocessed and the equipment de-noised by applying the channel power processing (CPP) formula in Annex D 3.2 to standard EN 50492, whoselinear transcription is as follows:


Implementation and results of mission10

IMPLEMENTATION AND RESULTS OF MISSION

In which [(Fmax-Fmin)/((Number of points SA-1) x RBW)] is the RBW filter imperfections correction parameter and SA designates spectrum analyser.

For evaluation of compliance with exposure limits, Annex K to standard EN 50492 prescribes:

Threshold

((Number of points SA-1)

In whichEfis the electricfieldstrength at frequency f and EL.fis the correspondinglimit.


Implementation and results of mission11

IMPLEMENTATION AND RESULTS OF MISSION

  • ASSESSMENT OF ELECTROMAGNETIC FIELD STRENGTHS

Electric field strength

V/m

Measurement points

Figure 7 : Summary histogram of levels of field strengths measured


Implementation and results of mission12

IMPLEMENTATION AND RESULTS OF MISSION

  • EXTRACT OF DOMINANT FIELD STRENGTH VALUES

  • The dominant levels were obtained in the service bands: PMR beacon, aeronautical radionavigation excluding TV, WLL and radiolocation.

  • At the opposite extreme, the lowest field strength value was obtained at measurement point  KORHOGO-05, with a value of 0.24794558 V/m .


Implementation and results of mission13

IMPLEMENTATION AND RESULTS OF MISSION

Total exposure

Measurement points

Figure 8 : Summary histogram of exposure levels

  • The highestexposurelevel wasobtained at point ADJAME-04, with a total exposure of 11%.


Conclusion and recommendations

Conclusion and recommendations

  • Upon completion of this measurement campaign, we conclude that at the places, dates and times of the measurements, the field strength levels measured comply with the exposure limits set by ICNIRP.

  • We take this opportunity to encourage telecommunication regulators to implement best practices through similar campaigns aimed at applying the precautionary principle.


National campaign to measure non ionizing radiation from radio installations

THANK YOU FOR YOUR ATTENTION


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