發(fā)布時(shí)間：2018-01-19 19:15

  本文關(guān)鍵詞： 觀測終端 ROACH 脈沖星觀測 FRB　出處：《天文學(xué)進(jìn)展》2017年02期 　論文類型：期刊論文

【摘要】：脈沖星觀測研究一直是新疆天文臺的主要研究方向,未來建設(shè)的新疆110 m口徑全可動射電望遠(yuǎn)鏡(簡稱QTT)也將其作為主要研究方向之一。南山25 m射電望遠(yuǎn)鏡當(dāng)前使用的脈沖星單脈沖觀測終端AFB已使用近20年,系統(tǒng)老化嚴(yán)重,為升級現(xiàn)有單脈沖觀測系統(tǒng),也為QTT的終端設(shè)計(jì)做預(yù)研,基于ROACH2研制了一套脈沖星觀測系統(tǒng)。該系統(tǒng)采用氫鐘與GPS時(shí)間同步以提供秒起始信號,對采樣時(shí)鐘計(jì)數(shù)并打入數(shù)據(jù)幀以獲取精準(zhǔn)時(shí)間間隔,兩者合成即可獲得精確時(shí)間信息;采用共享內(nèi)存緩沖區(qū),使數(shù)據(jù)在多進(jìn)程間共享實(shí)現(xiàn)并行實(shí)時(shí)處理。該系統(tǒng)可用于脈沖星單脈沖或到達(dá)時(shí)間觀測,也可用于脈沖星、RRAT或FRB等搜尋。已在南山進(jìn)行單脈沖、長時(shí)間折疊、FRB實(shí)時(shí)搜尋等觀測試驗(yàn),試驗(yàn)數(shù)據(jù)表明該終端準(zhǔn)確、穩(wěn)定、可靠,已達(dá)到投入觀測使用的要求。
[Abstract]:Pulsar observation has been the main research direction of Xinjiang Observatory. Future Construction of Xinjiang 110m Aperture fully movable Radio Telescope (QTT). It is also regarded as one of the main research directions. The pulsar monopulse observation terminal (AFB), which is currently used in Nanshan 25m radio telescope, has been used for nearly 20 years. The system is aging seriously, so it is necessary to upgrade the existing monopulse observation system and to design the terminal of QTT. A pulsar observation system based on ROACH2 is developed. The system uses hydrogen clock and GPS time synchronization to provide the second start signal, counts the sampling clock and enters the data frame to obtain the accurate time interval. The precise time information can be obtained by combining them. The shared memory buffer is used to realize parallel real-time processing of data in multi-process sharing. The system can be used for pulsar monopulse or time of arrival observation or pulsar. RRAT or FRB have been used in the monopulse, long time folding FRB real-time search and other observation experiments. The experimental data show that the terminal is accurate, stable and reliable. The requirements for observation have been met.
【作者單位】： 中國科學(xué)院新疆天文臺;中國科學(xué)院射電天文重點(diǎn)實(shí)驗(yàn)室;
【基金】：973計(jì)劃(2015CB857100) 中國科學(xué)院天文臺站設(shè)備更新及重大儀器設(shè)備運(yùn)行專項(xiàng) 國家自然科學(xué)基金(11403091,11253001,U1431230)
【分類號】：P111.44
【正文快照】： 1引言新疆天文臺南山25 m射電望遠(yuǎn)鏡是我國較早開展脈沖星觀測研究的天文臺站之一,經(jīng)過十幾年的發(fā)展,已經(jīng)成為我國脈沖星觀測的重要基地。目前,新疆臺擁有脈沖星單脈沖和到達(dá)時(shí)間兩套觀測系統(tǒng),已經(jīng)在脈沖星到達(dá)時(shí)間監(jiān)測、星際閃爍等方面取得一系列成果[1 4]。南山25 m射電望，

本文編號：1445242