national campaign to measure non-ionizing radiation from radio installations
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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
Kampala, Uganda, 23 June 2014 3
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
Kampala, Uganda, 23 June 2014 4
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.
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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
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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.
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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
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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)
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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
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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.
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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 CONDUCTEDIn accordance with the initial distribution in the terms of reference, 122 points were indeed measured.
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IMPLEMENTATION AND RESULTS OF MISSION
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
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IMPLEMENTATION AND RESULTS OF MISSION
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.
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IMPLEMENTATION AND RESULTS OF MISSION
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.
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IMPLEMENTATION AND RESULTS OF MISSION
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
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IMPLEMENTATION AND RESULTS OF MISSION
MEASURING EQUIPMENT
Figure 6 : Selective measurement stationsFigure 5 : Broadband measurement station
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IMPLEMENTATION AND RESULTS OF MISSION
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
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IMPLEMENTATION AND RESULTS OF MISSION
PARAMETERIZATION OF STATIONS IN ACCORDANCE WITH CENELEC 50492
Detection mode;Measurement mode;Resolution bandwidth (RBW);Video bandwidth (VBW).
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IMPLEMENTATION AND RESULTS OF MISSION
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:
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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:
In which Ef is the electric field strength at frequency f and EL.f is the corresponding limit.
((Number of points SA-1) Threshold
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IMPLEMENTATION AND RESULTS OF MISSION
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
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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 .
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IMPLEMENTATION AND RESULTS OF MISSION
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.
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THANK YOU FOR YOUR ATTENTION