Instrumentation & Measurement Magazine 24-4 - 104

For More Reliable Aviation
Navigation: Improving the
Existing Assessment of Airport
Electromagnetic Environment
Yutao Tang, Feng Zhu, and Yingying Chen
H
igh-speed trains close to airports emit electromagnetic
radiation (EMR), which might interfere with
the airport communication and navigation signals
and create a safety hazard for the aircraft operation. Therefore,
it is necessary to measure and evaluate the electromagnetic environment
when building high-speed railway near the airport.
In this paper, a new influence factor, train speed, is considered
in the existing airport electromagnetic environment assessment
system to make the evaluation result more reliable and
real. We highlight the principles and results of the influence
of train speed on the EMR from the high-speed train. Then,
we present the corresponding train speed limit to mitigate
the electromagnetic interference (EMI) of the nearby navigation
station.
Overview of Airport Electromagnetic
Environment
Aviation navigation provides direction, distance, and position
information to aircraft by using navigation equipment to ensure
the safety of aircraft flying day and night under various
weather conditions. In addition, the radio signal quality of aviation
navigation depends not only on the quality and operation
level of navigation equipment, but also on the electromagnetic
(EM) environment around the navigation stations.
With the rapid development of modern science, technology,
industry, and agriculture, EM energy has been widely
used in various sectors and fields of the national economy.
Thus, the EM pollution around the airport is becoming more
and more serious. The harm of electromagnetic interference
(EMI) in aviation navigation has attracted the attention of
many countries and international organizations. Aviation navigation
has been considered as an important matter related to
the safety of human life and property by the International Telecommunication
Union (ITU). At present, the main EMI sources
near the airport include:
◗ Broadcasting and Television Signals: In recent years, with
the development of very-high-frequency (VHF, 30 ∼ 300
MHz) broadcasting service and the expansion of broadcasting
frequency range, some broadcasting frequencies
are consistent with aviation navigation frequency, which
interferes with navigation signals.
◗ Industrial, Scientific, and Medical Equipment: The
frequency of EM waves emitted by the industrial,
scientific, and medical devices is unstable, and the
instantaneous frequency offset can reach several thousand
Hertz. Therefore, the frequency of this kind of
electromagnetic wave is likely to be consistent with the
frequency of navigation signal, thus causing EMI to aviation
navigation.
◗ Power Transmission System - High-Voltage Cable: The
power transmission system is more widely distributed
in urban and rural areas, and its impact on aviation navigation
is more and more obvious. The main interference
to aviation navigation is corona discharge, carrier control
signal on the wire, and signal reflection of high voltage
line.
◗ Electrified Railway - High-Speed Trains: A high-speed
train gets electricity power by connecting its pantographs
to the power supply line. But the pantograph
and power supply line will inevitably have some brief
separations during the train operation, resulting in the
pantograph-catenary arc (PCA). The PCA produces
intense, instantaneous, and wide frequency range electromagnetic
radiation (EMR), which easily interferes with
navigation signals [1]-[3].
Compared with the first three EMI sources, the intensity of
EMI produced by PCA of the high-speed train is the strongest.
The EM environment protection zone of a civil airport is a
circular area with a radius of 10 km, taking the terminal point
of the airport runway as the center [4], [5]. In principle, the
EMI sources, such as high-voltage power transmission lines
and electrified railways, are not allowed in this zone to ensure
the good quality of the aviation navigation signal. However,
in order to facilitate passengers to transfer at the airport, it is
This work was supported by the National Key R&D Program of China under the Research Grants No. 2018YFC0809500.
104
IEEE Instrumentation & Measurement Magazine
1094-6969/21/$25.00©2021IEEE
June 2021

Instrumentation & Measurement Magazine 24-4

Table of Contents for the Digital Edition of Instrumentation & Measurement Magazine 24-4

No label
Instrumentation & Measurement Magazine 24-4 - No label
Instrumentation & Measurement Magazine 24-4 - Cover2
Instrumentation & Measurement Magazine 24-4 - 1
Instrumentation & Measurement Magazine 24-4 - 2
Instrumentation & Measurement Magazine 24-4 - 3
Instrumentation & Measurement Magazine 24-4 - 4
Instrumentation & Measurement Magazine 24-4 - 5
Instrumentation & Measurement Magazine 24-4 - 6
Instrumentation & Measurement Magazine 24-4 - 7
Instrumentation & Measurement Magazine 24-4 - 8
Instrumentation & Measurement Magazine 24-4 - 9
Instrumentation & Measurement Magazine 24-4 - 10
Instrumentation & Measurement Magazine 24-4 - 11
Instrumentation & Measurement Magazine 24-4 - 12
Instrumentation & Measurement Magazine 24-4 - 13
Instrumentation & Measurement Magazine 24-4 - 14
Instrumentation & Measurement Magazine 24-4 - 15
Instrumentation & Measurement Magazine 24-4 - 16
Instrumentation & Measurement Magazine 24-4 - 17
Instrumentation & Measurement Magazine 24-4 - 18
Instrumentation & Measurement Magazine 24-4 - 19
Instrumentation & Measurement Magazine 24-4 - 20
Instrumentation & Measurement Magazine 24-4 - 21
Instrumentation & Measurement Magazine 24-4 - 22
Instrumentation & Measurement Magazine 24-4 - 23
Instrumentation & Measurement Magazine 24-4 - 24
Instrumentation & Measurement Magazine 24-4 - 25
Instrumentation & Measurement Magazine 24-4 - 26
Instrumentation & Measurement Magazine 24-4 - 27
Instrumentation & Measurement Magazine 24-4 - 28
Instrumentation & Measurement Magazine 24-4 - 29
Instrumentation & Measurement Magazine 24-4 - 30
Instrumentation & Measurement Magazine 24-4 - 31
Instrumentation & Measurement Magazine 24-4 - 32
Instrumentation & Measurement Magazine 24-4 - 33
Instrumentation & Measurement Magazine 24-4 - 34
Instrumentation & Measurement Magazine 24-4 - 35
Instrumentation & Measurement Magazine 24-4 - 36
Instrumentation & Measurement Magazine 24-4 - 37
Instrumentation & Measurement Magazine 24-4 - 38
Instrumentation & Measurement Magazine 24-4 - 39
Instrumentation & Measurement Magazine 24-4 - 40
Instrumentation & Measurement Magazine 24-4 - 41
Instrumentation & Measurement Magazine 24-4 - 42
Instrumentation & Measurement Magazine 24-4 - 43
Instrumentation & Measurement Magazine 24-4 - 44
Instrumentation & Measurement Magazine 24-4 - 45
Instrumentation & Measurement Magazine 24-4 - 46
Instrumentation & Measurement Magazine 24-4 - 47
Instrumentation & Measurement Magazine 24-4 - 48
Instrumentation & Measurement Magazine 24-4 - 49
Instrumentation & Measurement Magazine 24-4 - 50
Instrumentation & Measurement Magazine 24-4 - 51
Instrumentation & Measurement Magazine 24-4 - 52
Instrumentation & Measurement Magazine 24-4 - 53
Instrumentation & Measurement Magazine 24-4 - 54
Instrumentation & Measurement Magazine 24-4 - 55
Instrumentation & Measurement Magazine 24-4 - 56
Instrumentation & Measurement Magazine 24-4 - 57
Instrumentation & Measurement Magazine 24-4 - 58
Instrumentation & Measurement Magazine 24-4 - 59
Instrumentation & Measurement Magazine 24-4 - 60
Instrumentation & Measurement Magazine 24-4 - 61
Instrumentation & Measurement Magazine 24-4 - 62
Instrumentation & Measurement Magazine 24-4 - 63
Instrumentation & Measurement Magazine 24-4 - 64
Instrumentation & Measurement Magazine 24-4 - 65
Instrumentation & Measurement Magazine 24-4 - 66
Instrumentation & Measurement Magazine 24-4 - 67
Instrumentation & Measurement Magazine 24-4 - 68
Instrumentation & Measurement Magazine 24-4 - 69
Instrumentation & Measurement Magazine 24-4 - 70
Instrumentation & Measurement Magazine 24-4 - 71
Instrumentation & Measurement Magazine 24-4 - 72
Instrumentation & Measurement Magazine 24-4 - 73
Instrumentation & Measurement Magazine 24-4 - 74
Instrumentation & Measurement Magazine 24-4 - 75
Instrumentation & Measurement Magazine 24-4 - 76
Instrumentation & Measurement Magazine 24-4 - 77
Instrumentation & Measurement Magazine 24-4 - 78
Instrumentation & Measurement Magazine 24-4 - 79
Instrumentation & Measurement Magazine 24-4 - 80
Instrumentation & Measurement Magazine 24-4 - 81
Instrumentation & Measurement Magazine 24-4 - 82
Instrumentation & Measurement Magazine 24-4 - 83
Instrumentation & Measurement Magazine 24-4 - 84
Instrumentation & Measurement Magazine 24-4 - 85
Instrumentation & Measurement Magazine 24-4 - 86
Instrumentation & Measurement Magazine 24-4 - 87
Instrumentation & Measurement Magazine 24-4 - 88
Instrumentation & Measurement Magazine 24-4 - 89
Instrumentation & Measurement Magazine 24-4 - 90
Instrumentation & Measurement Magazine 24-4 - 91
Instrumentation & Measurement Magazine 24-4 - 92
Instrumentation & Measurement Magazine 24-4 - 93
Instrumentation & Measurement Magazine 24-4 - 94
Instrumentation & Measurement Magazine 24-4 - 95
Instrumentation & Measurement Magazine 24-4 - 96
Instrumentation & Measurement Magazine 24-4 - 97
Instrumentation & Measurement Magazine 24-4 - 98
Instrumentation & Measurement Magazine 24-4 - 99
Instrumentation & Measurement Magazine 24-4 - 100
Instrumentation & Measurement Magazine 24-4 - 101
Instrumentation & Measurement Magazine 24-4 - 102
Instrumentation & Measurement Magazine 24-4 - 103
Instrumentation & Measurement Magazine 24-4 - 104
Instrumentation & Measurement Magazine 24-4 - 105
Instrumentation & Measurement Magazine 24-4 - 106
Instrumentation & Measurement Magazine 24-4 - 107
Instrumentation & Measurement Magazine 24-4 - 108
Instrumentation & Measurement Magazine 24-4 - 109
Instrumentation & Measurement Magazine 24-4 - 110
Instrumentation & Measurement Magazine 24-4 - 111
Instrumentation & Measurement Magazine 24-4 - 112
Instrumentation & Measurement Magazine 24-4 - 113
Instrumentation & Measurement Magazine 24-4 - 114
Instrumentation & Measurement Magazine 24-4 - 115
Instrumentation & Measurement Magazine 24-4 - 116
Instrumentation & Measurement Magazine 24-4 - 117
Instrumentation & Measurement Magazine 24-4 - 118
Instrumentation & Measurement Magazine 24-4 - 119
Instrumentation & Measurement Magazine 24-4 - 120
Instrumentation & Measurement Magazine 24-4 - Cover3
Instrumentation & Measurement Magazine 24-4 - Cover4
https://www.nxtbook.com/allen/iamm/24-6
https://www.nxtbook.com/allen/iamm/24-5
https://www.nxtbook.com/allen/iamm/24-4
https://www.nxtbook.com/allen/iamm/24-3
https://www.nxtbook.com/allen/iamm/24-2
https://www.nxtbook.com/allen/iamm/24-1
https://www.nxtbook.com/allen/iamm/23-9
https://www.nxtbook.com/allen/iamm/23-8
https://www.nxtbook.com/allen/iamm/23-6
https://www.nxtbook.com/allen/iamm/23-5
https://www.nxtbook.com/allen/iamm/23-2
https://www.nxtbook.com/allen/iamm/23-3
https://www.nxtbook.com/allen/iamm/23-4
https://www.nxtbookmedia.com