Correction of Refracted Propagation Effects for Airborne Radar Tracking

Fortunati, Stefano; Gini, Fulvio; Greco, Maria; Farina, A.; Graziano, A.; Giompapa, Sofia; Castella, F.R.

doi:10.1109/taes.2013.6404089

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…The calculation results of (14) show that the greater the receiving antenna erection height, the lower the main basic propagation loss. For example, the main basic propagation loss can be reduced about 5 dB by increasing the antenna height from the sea level to 1000 m when the distance, D between target, T and receiver, R is 300 km, and the loss reduction continues to decrease with increasing distance.…”

Section: Effect On Main Loss By Receiving Antenna Erection Heightmentioning

confidence: 99%

“…According to Zhang's model of the prediction on troposcatter propagation loss, the main basic propagation loss [6] can be represented as L b0 = F + 30 lg f + 30 lg Q 0 + 10 lg d + 20 lg 5 + gh 1 + 4.343gh 0 (14) where F is the meteorological factor (dB), and can be valued as F = 26 dB on the maritime temperate sea surface according to [6], f is frequency (kHz), d is the path length (km) which can be calculated by the channel geometry as shown in Fig. 2, h 0 , h 1 are shown in Fig.…”

Section: Effect On Main Loss By Receiving Antenna Erection Heightmentioning

confidence: 99%

“…Currently, existing troposcatter ranging mechanisms usually have to fuse multi-station information to range BLOS targets such as in [12] and to track them as discussed in [13], or to synthesise racetrack information of an airborne station to range and track targets as in [14]. Consequently, a single ground base station position system is of significant value to troposcatter BLOS ranging with its potential convenience (which may be built on vehicles) and reduced expense.…”

Section: Introductionmentioning

confidence: 99%

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Receiving antenna mode of troposcatter passive ranging based on the signal group delay

Wang

et al. 2017

IET Microwaves, Antennas & Propagation

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The beyond‐line‐of‐sight (BLOS) ranging of radiation sources can be realised through the troposcatter propagation of electromagnetic signals. Present troposcatter ranging systems are based on multi‐station cross localisation theory wherein synchronisation and data fusion of all stations are not tractable. The troposcatter signal group delay properties provide a new ranging mechanism that can be realised through a single station conveniently and inexpensively. However, for radiation sources with multibeams, e.g. frequency‐scanned radar, which forms several sub‐beams with different elevation angles in the vertical direction, the scattering signal of sub‐beams with high elevation angles has overall hysteresis compared to lower ones. This effect is called group delay between sub‐beams. In this study, a one‐to‐one correspondence between group delay and target distance is derived to a closed‐form expression with target and receiver antenna parameters. Furthermore, a group‐delay‐based passive ranging mechanism is proposed for exploiting this correspondence to increase the range of the BLOS target. Then two indicators for evaluation, ranging resolution and delay‐measure requirement, are proposed for investigating ranging performance under the receiving antenna mode with different elevation angles, vertical beamwidths and erection heights. Results show the ranging resolution is ∼0.1–0.3 μs/300 km and delay‐measure requirement is ∼0.002–0.033 μs for the given parameters.

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Section: Effect On Main Loss By Receiving Antenna Erection Heightmentioning

confidence: 99%

Section: Effect On Main Loss By Receiving Antenna Erection Heightmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Receiving antenna mode of troposcatter passive ranging based on the signal group delay

Wang

et al. 2017

IET Microwaves, Antennas & Propagation

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“…In general, many studies on target detection performance have been investigated considering RCS fluctuations with clutters [19], multipath effects [20], regional environments [21], and refractive profiles [22][23][24]. In this research, we calculate the probability of the target detection using thresholds derived from the free-space path loss levels to examine the target detection performance.…”

Section: Target Detection Performance In Abnormal Atmospherementioning

confidence: 99%

Analysis of the Target Detection Performance of Air-to-Air Airborne Radar Using Long-Range Propagation Simulation in Abnormal Atmospheric Conditions

Lim

Seo

et al. 2020

Applied Sciences

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In this paper, we propose the analysis of the target detection performance of air-to-air airborne radars using long-range propagation simulations with a novel quad-linear refractivity model under abnormal atmospheric conditions. The radar propagation characteristics and the target detection performance are simulated using the Advanced Refractive Effects Prediction System (AREPS) software, where the refractivity along the altitude, array antenna pattern, and digital terrain elevation data are considered as inputs to obtain the path loss of the wave propagation. The quad-linear model is used to approximate the actual refractivity data, which are compared to the data derived using the conventional trilinear refractivity model. On the basis of the propagation simulations, we propose a detection performance metric in terms of the atmosphere (DPMA) for intuitively examining the long-range propagation characteristics of airborne radars in air-to-air situations. To confirm the feasibility of using the DPMA map in various duct scenarios, we employ two actual refractive indices to observe the DPMA results in relation to the height of the airborne radar.

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Propagation

Solimini¹

2016

Remote Sensing and Digital Image Processing

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Correction of Refracted Propagation Effects for Airborne Radar Tracking

Cited by 7 publications

References 20 publications

Receiving antenna mode of troposcatter passive ranging based on the signal group delay

Receiving antenna mode of troposcatter passive ranging based on the signal group delay

Analysis of the Target Detection Performance of Air-to-Air Airborne Radar Using Long-Range Propagation Simulation in Abnormal Atmospheric Conditions

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