scholarly journals Modernization of the Irkutsk Incoherent Scatter Radar

2017 ◽  
Vol 3 (3) ◽  
pp. 76-81
Author(s):  
Дмитрий Кушнарев ◽  
Dmitriy Kushnarev ◽  
Валентин Лебедев ◽  
Valentin Lebedev ◽  
Виталий Хахинов ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Acquisition System ◽  
Incoherent Scatter Radar ◽  
Signal To Noise ◽  
Incoherent Scatter ◽  
Angle Measurements ◽  
Scatter Radar ◽  
Space Experiments ◽  
Radar Measurements ◽  
Noise Ratio

We present the results of modernization of the Irkutsk Incoherent Scatter Radar’s control and acquisition system. The modernization was carried out using results of space experiments Plasma–Progress and Radar–Progress involving Progress cargo spacecraft. The modernization has improved the accuracy of radar measurements of low-orbit spacecraft. For example, with a signal-to-noise ratio equal to10, the accuracy of range and angle measurements is 100–300 m and 1–5 arc min.

scholarly journals Modernization of the Irkutsk Incoherent Scatter Radar

2017 ◽  
Vol 3 (3) ◽  
pp. 88-94
Author(s):  
Дмитрий Кушнарев ◽  
Dmitriy Kushnarev ◽  
Валентин Лебедев ◽  
Valentin Lebedev ◽  
Виталий Хахинов ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Acquisition System ◽  
Incoherent Scatter Radar ◽  
Signal To Noise ◽  
Incoherent Scatter ◽  
Angle Measurements ◽  
Scatter Radar ◽  
Space Experiments ◽  
Radar Measurements ◽  
Noise Ratio

We present the results of modernization of the Irkutsk Incoherent Scatter Radar’s control and acquisition system. The modernization was carried out using results of space experiments “Plasma—Progress” and “Radar—Progress” involving Progress cargo spacecraft. The modernization has improved the accuracy of radar measurements of low-orbit spacecraft. For example, with a signal-to-noise ratio equal to10, the accuracy of range and angle measurements is 100–300 m and 1–5 arc min.

scholarly journals MIDAS-W: a workstation-based incoherent scatter radar data acquisition system

2000 ◽  
Vol 18 (9) ◽  
pp. 1231-1241 ◽  
Author(s):  
J. M. Holt ◽  
P. J. Erickson ◽  
A. M. Gorczyca ◽  
T. Grydeland
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
High Speed ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Incoherent Scatter Radar ◽  
Raw Data ◽  
Incoherent Scatter ◽  
Scatter Radar ◽  
Instruments And Techniques

Abstract. The Millstone Hill Incoherent Scatter Data Acquisition System (MIDAS) is based on an abstract model of an incoherent scatter radar. This model is implemented in a hierarchical software system, which serves to isolate hardware and low-level software implementation details from higher levels of the system. Inherent in this is the idea that implementation details can easily be changed in response to technological advances. MIDAS is an evolutionary system, and the MIDAS hardware has, in fact, evolved while the basic software model has remained unchanged. From the earliest days of MIDAS, it was realized that some functions implemented in specialized hardware might eventually be implemented by software in a general-purpose computer. MIDAS-W is the realization of this concept. The core component of MIDAS-W is a Sun Microsystems UltraSparc 10 workstation equipped with an Ultrarad 1280 PCI bus analog to digital (A/D) converter board. In the current implementation, a 2.25 MHz intermediate frequency (IF) is bandpass sampled at 1 µs intervals and these samples are multicast over a high-speed Ethernet which serves as a raw data bus. A second workstation receives the samples, converts them to filtered, decimated, complex baseband samples and computes the lag-profile matrix of the decimated samples. Overall performance is approximately ten times better than the previous MIDAS system, which utilizes a custom digital filtering module and array processor based correlator. A major advantage of MIDAS-W is its flexibility. A portable, single-workstation data acquisition system can be implemented by moving the software receiver and correlator programs to the workstation with the A/D converter. When the data samples are multicast, additional data processing systems, for example for raw data recording, can be implemented simply by adding another workstation with suitable software to the high-speed network. Testing of new data processing software is also greatly simplified, because a workstation with the new software can be added to the network without impacting the production system. MIDAS-W has been operated in parallel with the existing MIDAS-1 system to verify that incoherent scatter measurements by the two systems agree. MIDAS-W has also been used in a high-bandwidth mode to collect data on the November, 1999, Leonid meteor shower.Key words: Electromagnetics (instruments and techniques; signal processing and adaptive antennas) – Ionosphere (instruments and techniques)

scholarly journals Radar imaging with EISCAT 3D

2021 ◽  
Vol 39 (1) ◽  
pp. 119-134
Author(s):  
Johann Stamm ◽  
Juha Vierinen ◽  
Juan M. Urco ◽  
Björn Gustavsson ◽  
Jorge L. Chau
Keyword(s):  
Electron Density ◽  
Time Resolution ◽  
Signal To Noise Ratio ◽  
Radar Imaging ◽  
Signal To Noise ◽  
Range Resolution ◽  
Incoherent Scatter ◽  
E Region ◽  
Noise Ratio ◽  
Imaging Performance

Abstract. A new incoherent scatter radar called EISCAT 3D is being constructed in northern Scandinavia. It will have the capability to produce volumetric images of ionospheric plasma parameters using aperture synthesis radar imaging. This study uses the current design of EISCAT 3D to explore the theoretical radar imaging performance when imaging electron density in the E region and compares numerical techniques that could be used in practice. Of all imaging algorithms surveyed, the singular value decomposition with regularization gave the best results and was also found to be the most computationally efficient. The estimated imaging performance indicates that the radar will be capable of detecting features down to approximately 90×90 m at a height of 100 km, which corresponds to a ≈0.05∘ angular resolution. The temporal resolution is dependent on the signal-to-noise ratio and range resolution. The signal-to-noise ratio calculations indicate that high-resolution imaging of auroral precipitation is feasible. For example, with a range resolution of 1500 m, a time resolution of 10 s, and an electron density of 2×1011m-3, the correlation function estimates for radar scatter from the E region can be measured with an uncertainty of 5 %. At a time resolution of 10 s and an image resolution of 90×90 m, the relative estimation error standard deviation of the image intensity is 10 %. Dividing the transmitting array into multiple independent transmitters to obtain a multiple-input–multiple-output (MIMO) interferometer system is also studied, and this technique is found to increase imaging performance through improved visibility coverage. Although this reduces the signal-to-noise ratio, MIMO has successfully been applied to image strong radar echoes as meteors and polar mesospheric summer echoes. Use of the MIMO technique for incoherent scatter radars (ISRs) should be investigated further.

Sign in / Sign up

Export Citation Format

Share Document