Power line radiation observed by the satellite "OHZORA"

Tomizawa, Ichiro; Yoshino, Takeo

doi:10.5636/jgg.37.309

Cited by 25 publications

(21 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Park (1977) observed ground-based PLHR during a magnetic storm. However, direct observations by satellites are rather rare and shown in few papers (Koons et al, 1978;Bell et al, 1982;Tomizawa and Yoshino, 1985;Parrot, 1994;Rodger et al, 1995)…”

Section: Introductionmentioning

confidence: 99%

ELF magnetospheric lines observed by DEMETER

et al. 2005

View full text Add to dashboard Cite

Abstract. The influence of man-made activity on the ionosphere may be very important. The effects induced by the Power Line Harmonic Radiation (PLHR) may change the natural wave activity and/or the ionospheric plasma components. One goal of the ionospheric satellite DEMETER launched in June 2004 is to study the ionospheric perturbations which could be related to this anthropogenic activity. As the first step, the paper presents Tram Lines (TL) which have been observed on board DEMETER with frequency intervals close to 50 Hz or 16 Hz 2/3 (the current frequency of the railways). When it is observable the frequency drift of these TL is very slow. It is shown that these events occur during periods of strong or moderate magnetic activity. A wave propagation analysis indicates that the TL observed below the low cutoff frequency of the hiss which is simultaneously present are coming from a region below the satellite. The conclusion is that these TL observed by DEMETER are produced by PLHR or radiation of railways lines.

show abstract

Section: Introductionmentioning

confidence: 99%

ELF magnetospheric lines observed by DEMETER

et al. 2005

View full text Add to dashboard Cite

show abstract

“…It was found long time ago that pow erful, ground based electrical energy sources and con sumers cause different ionospheric phenomena, in particular, variations in the EM field and plasma parameters in the ionosphere (in turn, these changes affect state of the terrestrial atmosphere). This effect had been revealed for the first time as early as the 1970s by both ground based (Helliwell et al, 1975;Park, 1977;Park and Helliwell, 1978) and satellite based (Bullough et al, 1976;Koons et al, 1978;Kostrov et al, 2010;Tomizawa and Yoshino, 1985) observa tions.…”

Section: Introductionmentioning

confidence: 89%

“…The researchers studying this phenomenon (Kostrov et al, 2010) think that these signals are caused directly by corresponding currents in power lines; however, it remains unclear why clustering took place simultaneously at different central frequencies, from about 1.4 to 14.5 kHz. The publications dealing with PLHR (Kostrov et al, 2010;Kikuchi, 1983;Tomizawa and Yoshino, 1985) have not given any convincing theoretical explanation.…”

Section: Experimental Observationsmentioning

confidence: 99%

Observations of radiation from power lines in near-earth space

2015

View full text Add to dashboard Cite

The possible effects of technogenic impacts on the ionosphere, with the continuing trend towards its sustainable growth, are unknown today. It is therefore very important and urgent task to conduct statisti cally valid research related to the study of variations of ionospheric parameters due to the influence of pow erful technogenic factors, primarily due to a significant increase of the electromagnetic energy production. In this paper, we discuss new results of observations of electromagnetic fields in the ionosphere at the power lines main frequency of 50 (60) Hz and its harmonics onboard SICH 1M (20041M ( ) and CHIBIS M (20121M ( -2014 satellites. The spatial distribution of the observed phenomena and their connection with possible ground based sources -powerful transmission lines is presented. It is concluded that organization of regular monitoring of technogenic fields may allow continuous control of energy consumption in both the local (within a country or even a powerful consumer) and global scales.

show abstract

“…While some insitu satellite measurements have been made, it is difficult to exactly locate the source of the radiation coming from the ground. For example, Ohzora satellite observations appeared to include Japanese PLHR at 50 and 60 Hz (Tomizawa and Yoshino, 1985). This identification was possible due to the mixed nature of the Japanese electrical grid, where 50 Hz is used in the northern "half" of the country, and 60 Hz in the south.…”

Section: Introductionmentioning

confidence: 99%

Identifying power line harmonic radiation from an electrical network

2005

View full text Add to dashboard Cite

Abstract. It has been suggested that the space environment is being polluted by power line harmonic radiation (PLHR), generated from harmonics of the electrical power transmission frequency (50 or 60 Hz) and radiated into the ionosphere and magnetosphere by long power lines. While some insitu satellite measurements of PLHR have been reported, it has proved difficult to confirm the source and overall significance. The electricity network of the city of Dunedin, New Zealand, is tiny compared to the many large industrial zones found outside New Zealand. However, the 1050 Hz ripple control signal injected into the local electrical grid at regular intervals as a load-control mechanism provides an opportunity for identifying PLHR strengths radiated from a spatially well defined electrical network. In-situ observations by satellites should allow a greater understanding of PLHR and its significance as man-made pollution to nearEarth space. Calculations have been undertaken to estimate the strength of the radiation fields expected from the ripple control signal which is injected into the Dunedin city electrical network. We find that ground-based measurements will not be sensitive enough for detection of the ripple control radiation fields, even during the quietest winter night. While significant power penetrates the lower ionosphere, this is well below the reported threshold required for nonlinear triggering in the Van Allen radiation belts. Some radiated fields at satellite altitudes should be detectable, allowing insitu measurements. At the altitude of the DEMETER mission, the radiated electric fields will not be detectable under any ionospheric conditions. However, we find that the radiated magnetic fields may be detectable by the DEMETER satellite at certain times, although this will be very difficult. Nonetheless, there is the possibility for future experimental campaigns.

show abstract

Power line radiation observed by the satellite "OHZORA"

Cited by 25 publications

References 5 publications

ELF magnetospheric lines observed by DEMETER

ELF magnetospheric lines observed by DEMETER

Observations of radiation from power lines in near-earth space

Identifying power line harmonic radiation from an electrical network

Contact Info

Product

Resources

About