Results 251 to 260 of about 40,069 (287)

Automated wildlife radio tracking

2019
Radio direction‐finding techniques have been widely employed by the wildlife tracking community because they offer powerful, flexible tools for monitoring animal movements and behavior. This chapter focuses on the application of this technology to monitor animal movements.
MacCurdy, R.B., Bijleveld, A.I., Gabrielson, R.M., Cortopassi, K.A.   +3 more
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Modelling radio-tracking data

Environmental and Ecological Statistics, 1995
This paper considers the analysis of locational data collected by sampling the path of an animal as it moves about its home range. In particular, the use of the bivariate Omstein-Uhlenbeck diffusion process as a model of path movement for a single animal, proposed by Dunn and Gipson (1977, Biometrics33, 85–101), is studied when the tracking data are ...
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Radio Tracking of Meteorological Balloons

Proceedings of the IRE, 1931
There is a need for upper air meteorological observation at night as well as in the daytime, in cloudy and in foggy weather as well as in clear. This need has given rise to a number of interesting methods of obtaining these data, among them radio tracking of meteorological balloons.
W.R. Blair, H.M. Lewis
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Radio Tracking of Dispersing Yellow Bellied Marmots

Transactions of the Kansas Academy of Science (1903-), 1968
Movement of yearling yellow bellied marmots was studied by radio tracking. The equipment developed for this study is described and consists of a surgically implanted transmitter, two types of direction finding antennas and an inexpensive receiver. The results suggest that a river forms a barrier to movements, dispersing animals use burrows of greater ...
H W, Shirer, J F, Downhower
openaire   +2 more sources

Radio tracking based on Time-Modulated Array

2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP), 2020
A novel radio tracking system is proposed by a two-element time modulated array (TMA). By estimating the spectrum of incident signal after time modulation, the system produces control signal and rotates the platform to tracking the source. The signal processing of the proposed method relies on two-point discrete Fourier transform (DFT).
Yiqing Liu, Chong He, Jingfeng Chen, Xudong Bai, Fanwei Kong   +4 more
openaire   +1 more source

Optimization of radio tracking frequencies

IEEE Transactions on Antennas and Propagation, 1979
The three major factors which limit the performance of animal radio tracking systems: propagation loss, antenna detuning, and signal variability are described. Propagation loss for antenna heights from ground level to 2 m at five frequencies between 70 and 1250 MHz has been measured in mangroves and shows high loss at high frequency.
openaire   +1 more source

Radio Tracking of Earth Satellites

American Journal of Physics, 1959
The characteristics of artificial earth satellite orbits are summarized and related to an observer on the surface of the earth. Equations and analytical approaches are developed for determining the orbit of a transmitting satellite using information from equipment for measuring the Doppler shift of the transmitted signal.
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Lunar Gravity via Apollo 14 Doppler Radio Tracking

Science, 1972
Gravity measurements at high resolution were obtained over a 100-kilometer band from +70° to -70° of longitude during the orbits of low periapsis altitude (approximately 16 kilometers). The line-of-sight accelerations are plotted on Aeronautical Chart and Information Center mercator charts (scale 1 : 1,000,000) as contours at 10-milligal intervals ...
W L, Sjogren, P, Gottlieb, P M, Muller, W, Wollenhaupt   +3 more
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EIGENANALYSIS OF SELECTION RATIOS FROM ANIMAL RADIO-TRACKING DATA

Ecology, 2006
The development of methods to analyze habitat selection when resources are defined by several categories (e.g., vegetation types) is a topical issue in radio-tracking studies. The White and Garrott statistic, an extension of the widely used test of Neu et al., can be used to determine whether habitat selection is significant. As well, Manly's selection
Calenge, C., Dufour, Anne-Béatrice
openaire   +3 more sources

[Radio-tracking of rabid foxes].

Comparative immunology, microbiology and infectious diseases, 1982
Three wild foxes were trapped, inoculated with rabid fox salivary glands virus and radio-tracked straightaway for about three weeks until the death of the animal. Comparison of movements between incubation and clinical period indicate principally no obvious alteration of the activity area; an important increase in movement, especially during the day ...
L, Andral, M, Artois, M F, Aubert, J, Blancou   +3 more
openaire   +1 more source