Spectral Line Registration Backend Based on USRP X300 Software Defined Radio

Bleiders, M.; Antyufeyev, A. V.; Patoka, O. M.; Orbidans, A.; Aberfelds, Artis; Steinbergs, J.; Bezrukovs, Vl.; Shmeld, I.

doi:10.1142/s2251171720500099

Cited by 5 publications

(7 citation statements)

References 9 publications

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“…As backed on-the-shelf SDR Ettus Research USRP X300 equipped with TwinRX daughterboard is used. (Bleiders et al, 2020) It is a multi-channel SDR transceiver, that allows obtaining complex sample rates and since USRP X300 is used together with TwinRX front-end daughterboard, it allows dualpolarization spectroscopy. (Bleiders et al, 2020) Optimal linearity receiver is find using calibration noise injection function.…”

Section: Sdr Backend Descriptionmentioning

confidence: 99%

“…(Bleiders et al, 2020) It is a multi-channel SDR transceiver, that allows obtaining complex sample rates and since USRP X300 is used together with TwinRX front-end daughterboard, it allows dualpolarization spectroscopy. (Bleiders et al, 2020) Optimal linearity receiver is find using calibration noise injection function. (Bleiders et al, 2020) Since power values is measured with noise source on and off, it should not depend on input signal level, that allows to find optimum attenuation values for USRP unit, telescope receiver and IF signal chain itself.…”

Section: Sdr Backend Descriptionmentioning

confidence: 99%

“…(Bleiders et al, 2020) Optimal linearity receiver is find using calibration noise injection function. (Bleiders et al, 2020) Since power values is measured with noise source on and off, it should not depend on input signal level, that allows to find optimum attenuation values for USRP unit, telescope receiver and IF signal chain itself. (Bleiders et al, 2020) 3.2 Implementation of frequency switching algorithm…”

Section: Sdr Backend Descriptionmentioning

confidence: 99%

“…Observations have been done with VIRAC 16 m and 32 m radio telescopes RT16 and RT32. Initially, both telescopes had Digital Base Band Converter (DBBC) (Tuccari, 2003) backend, recently SDR (Bleiders et al, 2020) based backend has been developed. Afterwards tool complex for single-dish radio telescope space maser observation data processing named Maser Data Processing Suite (MDPS).…”

Section: Introductionmentioning

confidence: 99%

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VIRAC Maser Data Processing Suite

Šteinbergs¹,

Aberfelds²,

Bleiders³

et al. 2021

Preprint

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Modern scientific research particularly radio astronomi- cal spectroscopic observations cannot be imagined without appropriate software suite. That is necessary because of two reasons 1) data are in digital form and 2) data processing is a complex multi-step process. In this paper created in VIRAC data processing suite for a single radio telescope, space maser observations are presented. Software Defined Radio (SDR) backend data processing is described. Implementation of the frequency switching algorithm, acquisition of observation data and their format for storing are discussed. Multiple ways to display the observation results are highlighted.

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Section: Sdr Backend Descriptionmentioning

confidence: 99%

Section: Sdr Backend Descriptionmentioning

confidence: 99%

Section: Sdr Backend Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

VIRAC Maser Data Processing Suite

Šteinbergs¹,

Aberfelds²,

Bleiders³

et al. 2021

Preprint

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show abstract

“…The system noise temperature was about 25 K for the RT-32 and about 33 K for the RT-16. A new FFT spectrometer based on the Ettus Research USRP X300 2 software-defined radio (SDR) platform was used for spectral analysis (Bleiders et al 2020). The spectrometer can be configured for a 12 MHz bandwidth with 16384 channels for simultaneous observations on the LCP & RCP.…”

Section: Observationsmentioning

confidence: 99%

New ex-OH maser detections in the northern celestial hemisphere

Patoka,

Antyufeyev,

Shmeld

et al. 2021

Preprint

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Aims. Molecular masers, including methanol and hydroxyl masers, and in particular the ones in excited rotational states (ex-OH masers), are one of the most informative tools for studying star-forming regions. So, the discovery, of new maser sources in these regions is of great importance. Many studies and surveys of ex-OH maser sources have been carried out in the southern celestial hemisphere, but only a few have been done in the northern hemisphere. The specific aim of this work is to close this gap. Methods. The star-forming regions in the northern hemisphere with known active methanol masers were observed to search for new ex-OH maser sources with the 32 m and 16 m radio telescopes of the Ventspils International Radio Astronomy Centre (VIRAC). Results. Three OH maser lines in the excited state at the 6035 MHz in three northern hemisphere star-forming regions are detected. The maser 189.030+0.783 was previously known, but we suggest this maser is a possible variable. We confirm recent detections of the ex-OH masers 85.41+0.00 and 90.92+1.49 by other authors. The magnetic field strength in the masering regions is estimated by using right circular polarization (RCP) and left circular polarization (LCP) pair splitting. The high-velocity resolution provides us with an estimation of a comparatively small magnetic field strength for the 189.030+0.783 and 90.92+1.49 star-forming regions.

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New ex-OH maser detections in the northern celestial hemisphere

Patoka

Antyufeyev

Shmeld

et al. 2021

A&A

Self Cite

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Aims. Molecular masers, including methanol and hydroxyl masers, and in particular the ones in excited rotational states (ex-OH masers), are one of the most informative tools for studying star-forming regions. So, the discovery, of new maser sources in these regions is of great importance. Many studies and surveys of ex-OH maser sources have been carried out in the southern celestial hemisphere, but only a few have been done in the northern hemisphere. The specific aim of this work is to close this gap. Methods. The star-forming regions in the northern hemisphere with known active methanol masers were observed to search for new ex-OH maser sources with the 32 m and 16 m radio telescopes of the Ventspils International Radio Astronomy Centre (VIRAC). Results. Three OH maser lines in the excited state at the 6035 MHz in three northern hemisphere star-forming regions are detected. The maser 189.030+0.783 was previously known, but we suggest this maser is a possible variable. We confirm recent detections of the ex-OH masers 85.41+0.00 and 90.92+1.49 by other authors. The magnetic field strength in the masering regions is estimated by using right circular polarization and left circular polarization pair splitting. The high-velocity resolution provides us with an estimation of a comparatively small magnetic field strength for the 189.030+0.783 and 90.92+1.49 star-forming regions.

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Spectral Line Registration Backend Based on USRP X300 Software Defined Radio

Cited by 5 publications

References 9 publications

VIRAC Maser Data Processing Suite

VIRAC Maser Data Processing Suite

New ex-OH maser detections in the northern celestial hemisphere

New ex-OH maser detections in the northern celestial hemisphere

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