national campaign to measure non-ionizing radiation from radio installations

Kampala, Uganda, 23 June 2014

NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM

RADIO INSTALLATIONS

DALLY Brice LandryTechnical Director

VALSCH Consulting Côte d’[email protected]

ITU Regional Standardization Forum for Africa

(Kampala, Uganda, 23-25 June 2014)

Kampala, Uganda, 23 June 2014 2

CONTENT OF PRESENTATION

CONTEXTTERMS OF REFERENCE

MISSION OBJECTIVESSCOPE OF ACTIVITY CONDUCTEDANTICIPATED DURATIONEXPECTED DELIVERABLES

IMPLEMENTATION AND RESULTS OF MISSION CONCLUSION AND RECOMMENDATIONS


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.

CONTEXT


TERMS OF REFERENCE

MISSION OBJECTIVESEvaluate 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 REFERENCESCOPE 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.

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

GROUP I GROUP II

NUMBER OF POINTS NUMBER OF POINTS

TOTAL NUMBER OF MEASUREMENT POINTS

TOTAL NUMBER OF MEASUREMENT POINTS


TERMS OF REFERENCEDURATION OF MISSION

Eight (08) weeks broken down as follows:Six (06) weeks of research in the field;Two (02) weeks of data processing and analysis.

NORMATIVE REFERENCESCENELEC standard (EN 50492): Basic standard for the in-situ measurement of electromagnetic field strength related to human exposure in the vicinity of base stations.


TERMS OF REFERENCE

Figure 1: Flowchart of measurement process

Choice of location

Analysis of location

Global evaluation of exposure

Broadband measurement

Result of measurement

Choice of locationDetailed evaluation of

exposure

Selective measurement

Extrapolation

Informative evaluation of field strength levels by service

Measurement by service integration

Determination of measurement uncertainty

Elaboration of measurement report

<3 V/m

<−3 V/m


TERMS OF REFERENCEInternational Council on Non-Ionizing Radiation Protection (ICNIRP) guidelines on exposure limits for the general public and workers – 1998.

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

Frequencyrange

Equivalent plane wavepower density

Seq(W/m2)


TERMS OF REFERENCE

EXPECTED DELIVERABLES

Order N° Heading Quantity

01 Site measurement report 122

02 Mapping of field strength levels

1

03 Synthesis report 1

Table 3: Summary of expected deliverables


IMPLEMENTATION AND RESULTS OF MISSION

IMPLEMENTATIONORGANIZATION 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.



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



CHOICE OF MEASUREMENT POINTS

Eligibility conditions1. Density of radio installations;2. Sensitivity of location (area of

conflict with local populations, school, hospital,….);

3. Busy area; 4. Public accessibility

(indoor/outdoor)5. Global exposure level (> 0,3 V/m).

Figure 2: Concept of area and of signage

Prohibitedarea

Restrictedaccessarea

Area open togeneral public

Signagefor

generalpublic



Consultation of databaseBased on ATCI’s distribution of the measurement points over all the communes selected, VALSCH Consulting proceeded as follows: 1.Mapped the location of 3632 multi-technology (GSM, WiMAX and UMTS) radio sites in operation;2.Identified locations with a high density of radio sites;3.Divided the mapping up into several areas;4.Consulted the database of complaints.



Research (in situ)

1.Visual identification coupled with rapid analysis using broadband field metre for each candidate measurement point;2.Competitive selection between three (3) candidates per measurement point retained.



Measurement points: Classroom, kindergarten, hospital room, private residence, market, café, public areas

Figure 3 : National mapping of measurement sites

Figure 4 : Mapping of measurement sites Abidjan district



MEASURING EQUIPMENT

Figure 6 : Selective measurement stationsFigure 5 : Broadband measurement station



N° DESIGNATION REFERENCE

1NBM 550 broadband measurement probe (100 kHz to 6 GHz)

2401/1B_D-0279 and 2402/14B_D-0024

2 SATIMO isotropic probe 100 kHz to 3 GHz TAS_4511_05

3 SATIMO isotropic probe 700 MHz to 6 GHz TSEMF26_4712_01

4 RF cable CAB _4312_06

5 RF switchbox SBOX _4312_05

6 PC (INSITE FREE pilot software) + dongle INSITE FREE V1.5.4

7 Spectrum analyser FSH8 by ROHDE & SCHWARZ

8 NOKIA mobile tracker N95

9 GPS positioner RoyalTeklogger

10 Meter

11 Camera NIKON

12 Hygrometer IHM

13 Telemeter BUSHNELL

14 Compass BUSHNELL

N° DESIGNATION REFERENCE

1NBM 550 broadband measurement probe (100 kHz to 6 GHz)

2401/1B_E-0659 and 2401/14B_D-0168

2 SATIMO isotropic probe 100 kHz to 3 GHz TAS_2611_02

3 SATIMO isotropic probe 700 MHz to 6 GHz TSEMF26_2611_02

4 RF cable CAB _4312_07

5 RF switchbox SBOX _4312_04

6 PC (INSITE FREE pilot software) + dongle INSITE FREE V1.5.4

7 Spectrum analyser ANRITSU MS 2713E

8 NOKIA mobile tracker N95

9 GPS positioner GARMIN

10 Meter

11 Camera NIKON

12 Hygrometer IHM

13 Telemeter BUSHNELL

14 Compass BUSHNELL

Table 4: Composition of measurement chain N°1 Table 5: Composition of measurement chain N°2



PARAMETERIZATION OF STATIONS IN ACCORDANCE WITH CENELEC 50492

Detection mode;Measurement mode;Resolution bandwidth (RBW);Video bandwidth (VBW).



RESULTS

In light of the values obtained in the broadband measurements (all below 3 V/m) and in accordance with the measurement process flowchart, no detailed measurement was effected.All the measurements were effected with a view to making an informative evaluation of the field strength levels by service.Thus, the channel power was processed and the equipment de-noised by applying the channel power processing (CPP) formula in Annex D 3.2 to standard EN 50492, whose linear transcription is as follows:



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:

In which Ef is the electric field strength at frequency f and EL.f is the corresponding limit.

((Number of points SA-1) Threshold



ASSESSMENT OF ELECTROMAGNETIC FIELD STRENGTHS

Figure 7 : Summary histogram of levels of field strengths measured

Electric field strength

V/m

Measu

rem

ent p

oin

ts



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 .



The highest exposure level was obtained at point ADJAME-04, with a total exposure of 11%.

Figure 8 : Summary histogram of exposure levels

Measu

rem

ent p

oin

ts

Total exposure

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.



THANK YOU FOR YOUR ATTENTION

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