Preliminary experimental results by the prototype of Sanya Incoherent Scatter Radar

Yue, Xinan; Wan, Weixing; Xiao, Han; Zeng, Lingqi; Ke, Changhai; Ning, Baiqi; Ding, Feng; Lin, Jun; Li, Chen; Li, MingYuan; Wang, Junyi; Hao, Honglian; Zhang, Ning

doi:10.26464/epp2020063

Cited by 14 publications

(14 citation statements)

References 24 publications

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“…In 2020, a prototype system of SYISR, which is 1/16 of the entire SYISR, first passed the tests including the amplitude and phase calibration among 256 channels, beam directivity confirmation by crossing the screen of the International Space Station, tropospheric wind detection and evaluation and observation of meteoroid fragmentation which are summarized in Yue et al. (2020, 2022). Then the whole SYISR was completed and put into normal operation in early 2021.…”

Section: Introductionmentioning

confidence: 99%

Initial Ionospheric Ion Line Results and Evaluation by Sanya Incoherent Scatter Radar (SYISR)

et al. 2022

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Incoherent scatter radar (ISR) is the most powerful ground-based instrument for the Earth's ionosphere. In the ISR measurement, the echo signal returning to the receiver is the electromagnetic wave signal scattered from the electrons in the ionospheric plasma, which are themselves affected by the positive ions. The radio wave scattering is a zero-mean random process whose amplitude is very weak relative to the transmitted power of radar, but the power spectral density of the scatter signal is not zero but a function of electron temperature (T e ), ion temperature (T i ), electron density (N e ), ion velocity (V i ), etc. The analytical relationship between the spectrum and these parameters

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Section: Introductionmentioning

confidence: 99%

Initial Ionospheric Ion Line Results and Evaluation by Sanya Incoherent Scatter Radar (SYISR)

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“…We have developed a series of observational modes based on SYISR‐8, such as profiling tropospheric wind, tracking hard targets, and observing meteors (Yue et al., 2020). When SYISR was completed, several new modes, including imaging the Moon and observing the ionosphere, were developed.…”

Section: Some Observation Resultsmentioning

confidence: 99%

Development of the Sanya Incoherent Scatter Radar and Preliminary Results

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Led by the Institute of Geology and Geophysics, Chinese Academy of Sciences, we have built a brand‐new modular active digital phased array, with all solid‐state transmission and digital receiving incoherent scatter radar (ISR) in Sanya (18.3°N, 109.6°E), a station in low latitude China called Sanya ISR (SYISR) since 2015. The development of SYISR involved the indoor design and development of key components, an outdoor prototype test, and the production and debugging of the entire array. The unique features of SYISR include a single‐channel directly connected T/R unit and antenna, a radar array monitoring and calibration network, environmental adaptability design and open architecture. The entire radar has 4,096 channels and 5,930 modules in total. All the technical indices, mainly including a >2 MW peak power, a 43 dBi antenna gain and a <120 K noise temperature, either meet or are superior to the designed value through an independent evaluation. Waveforms of single pulse, linear frequency modulation, Barker code, long pulse and alternating code have been implemented to meet multiple purposes. Four observational modes for ionospheric experiments, including zenith stare, perpendicular to geomagnetic field, meridian scan, and all sky scan, have been developed. We have implemented time domain decoding, frequency domain decoding, and statistical inversion methods in calculating the autocorrelation function and power spectra in signal processing. The preliminary experimental results on ionospheric parameters, plasma lines, irregularities and hard targets are reasonable and encouraging, which greatly enhances our confidence in achieving our scientific goals in the future.

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“…Furthermore, the meridional wind velocities derived from the VAD method were 8.59 m/s, 6.49 m/s, 4.72 m/s, 3.74 m/s, and 2.20 m/s for zenith angles of 3°, 6°, 9°, 12°, and 15°, respectively, at 18.2 km. At heights of 10-15 km, the meridional wind measured at zenith SYISR-8 is located in Nanjing, while SYISR is located in Sanya [29]. There are only two radiosondes in Haikou and Xisha, which are more than 100 km away from Sanya.…”

Section: Horizontal Wind Velocitymentioning

confidence: 99%

“…The meridional wind velocities calculated by the VAD method at the zenith angle of 3° and 15° reached a maximum of 10 m/s and 5 m/s, respectively, while the maxima derived from the GEO method were 11 m/s and 6 m/s, respectively. SYISR-8 is located in Nanjing, while SYISR is located in Sanya [29]. There are only two radiosondes in Haikou and Xisha, which are more than 100 km away from Sanya.…”

Section: Horizontal Wind Velocitymentioning

confidence: 99%

“…It can switch beam pointing in milliseconds (ms) and set up any arbitrary beam as needed in the radar effective detection area, so it is suitable for tropospheric wind detection in a flexible way. To address the risk of large arrays during the construction of the SYISR, a preliminary tropospheric wind field experiment was carried out with eight subarrays (SYISR-8) [29] to obtain tropospheric wind field information, but the effective detection height was less than 10 km. The consistency was evaluated first by comparing the wind results with SYISR-8, dedicated balloon-based global positioning system (GPS), and co-located radiosonde results.…”

Section: Introductionmentioning

confidence: 99%

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Initial Tropospheric Wind Observations by Sanya Incoherent Scatter Radar

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Sanya incoherent scatter radar (SYISR) is a newly developed phased array incoherent scatter radar in the low latitudes of China located at Sanya (18.3°N, 109.6°E), Hainan Province. The main objective of SYISR is to observe the ionosphere. Given its frequency and power, it should have the capability to observe the troposphere. In this study, we show several tropospheric wind experiments that may indicate radar function expansion and capability verification, although observing the troposphere will not be an operation mode in the future. Reliable radar echoes were detected by SYISR up to 20 km with a turbulence scale of 0.35 m and a frequency of 430 MHz. Generally, both the geometric (GEO) method and the velocity azimuth display (VAD) method give similar wind profiles. Above 10 km, the discrepancy between the two methods becomes nonnegligible. For the same method, the discrepancy above 15–20 km among winds derived from different zenith angle measurements is nonnegligible. The VAD methods give more reasonable results at higher altitudes. The standard deviation of the difference (SYISR radar minus the reanalysis data ERA5) for zonal wind and meridional wind was 1.1 m/s and 0.78 m/s, respectively. During rainfall, we can distinguish the spectrum of rainfall and atmospheric turbulence from the power spectrum according to the spectral widths and Doppler frequency shifts.

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Preliminary experimental results by the prototype of Sanya Incoherent Scatter Radar

Cited by 14 publications

References 24 publications

Initial Ionospheric Ion Line Results and Evaluation by Sanya Incoherent Scatter Radar (SYISR)

Initial Ionospheric Ion Line Results and Evaluation by Sanya Incoherent Scatter Radar (SYISR)

Development of the Sanya Incoherent Scatter Radar and Preliminary Results

Initial Tropospheric Wind Observations by Sanya Incoherent Scatter Radar

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