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
brice.dally@valsch-consulting.ci
Kampala, Uganda, 23 June 2014
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
Kampala, Uganda, 23 June 2014
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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.
Kampala, Uganda, 23 June 2014
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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.
Kampala, Uganda, 23 June 2014
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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
TOTAL NUMBER OF
MEASUREMENT POINTS
NUMBER OF POINTS
TOTAL NUMBER OF
MEASUREMENT POINTS
Table 1: Distribution of measurement points by group and by commune
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TERMS OF REFERENCE
DURATION 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 REFERENCES
CENELEC standard (EN 50492): Basic
standard for the in-situ measurement of
electromagnetic field strength related to
human exposure in the vicinity of base
stations.
Kampala, Uganda, 23 June 2014
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TERMS OF REFERENCE
Choice of location
Analysis of location
Global evaluation of
exposure
Broadband measurement
Result of
measurement
<−3 V/m
Detailed evaluation of
Choiceexposure
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
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TERMS OF REFERENCE
International Council on Non-Ionizing
Radiation Protection (ICNIRP) guidelines
on exposure limits for the general public
and workers – 1998.
Frequency
range
Equivalent plane wave
power density
Seq
(W/m2)
Table 2: Formula for calculating the reference levels set by ICNIRP
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TERMS OF REFERENCE
EXPECTED DELIVERABLES
Order N°
Heading
01
Site measurement report
02
Mapping of field strength
levels
03
Synthesis report
Quantity
122
1
1
Table 3: Summary of expected deliverables
Kampala, Uganda, 23 June 2014
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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.
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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 CONDUCTED
In 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 conditions
1. 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).
Kampala, Uganda, 23 June 2014
Prohibited
area
Restricted
access
area
Area open to
general
public
Signage
for
general
public
Figure 2: Concept of area
and
of signage
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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:
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
Figure 3 : National mapping of
measurement sites
Figure 4 : Mapping of measurement sites
Abidjan district
Measurement points:
Classroom, kindergarten, hospital room, private
residence, market, café, public areas
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IMPLEMENTATION AND RESULTS OF
MISSION
MEASURING EQUIPMENT
Figure 5 : Broadband measurement
station
Kampala, Uganda, 23 June 2014
Figure 6 : Selective measurement stations
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IMPLEMENTATION AND RESULTS OF
MISSION
N°
DESIGNATION
REFERENCE
N°
DESIGNATION
REFERENCE
1
NBM 550 broadband measurement probe (100 kHz
to 6 GHz)
2401/1B_E-0659 and 2401/14B_D0168
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
1
NBM 550 broadband measurement probe (100 kHz
to 6 GHz)
2401/1B_D-0279 and 2402/14B_D0024
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
11 Camera
NIKON
12
Hygrometer
IHM
12 Hygrometer
IHM
13
Telemeter
BUSHNELL
13 Telemeter
BUSHNELL
14
Compass
BUSHNELL
14 Compass
BUSHNELL
10 Meter
Table 4: Composition of measurement chain
N°1
Kampala, Uganda, 23 June 2014
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:
Kampala, Uganda, 23 June 2014
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IMPLEMENTATION AND RESULTS OF
MISSION
((Number of points SA-1)
Threshold
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.
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IMPLEMENTATION AND RESULTS OF
MISSION
Electric field
strength
V/m
ASSESSMENT OF ELECTROMAGNETIC
FIELD STRENGTHS
Figure 7 : Summary histogram of levels of field strengths measured
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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
Total
exposure
Figure 8 : Summary histogram of exposure levels
The highest exposure level was obtained at
point ADJAME-04, with a total exposure of
11%.
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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.
Kampala, Uganda, 23 June 2014
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
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