本文關(guān)鍵詞： 同波束VLBI 差分相位時(shí)延 多目標(biāo)探測(cè)器 精密定軌 重力場(chǎng)探測(cè)　出處：《中國(guó)科學(xué):物理學(xué) 力學(xué) 天文學(xué)》2010年06期 　論文類型：期刊論文

【摘要】：同波束VLBI即用射電望遠(yuǎn)鏡的主波束同時(shí)觀測(cè)角距很小的兩個(gè)探測(cè)器發(fā)出的巧妙配置的多頻點(diǎn)信標(biāo),據(jù)此得到兩探測(cè)器在兩個(gè)測(cè)站間的誤差為皮秒量級(jí)的差分相位時(shí)延.在月球衛(wèi)星SELENE的兩個(gè)小衛(wèi)星Rstar和Vstar的測(cè)定軌中,利用40多分鐘的同波束VLBI和測(cè)速測(cè)距數(shù)據(jù)數(shù)小時(shí)的短弧定軌精度已顯著提高,而一年多的定軌結(jié)果表明弧長(zhǎng)數(shù)天的長(zhǎng)弧定軌精度已達(dá)10m左右,充分證明了同波束VLBI在多目標(biāo)衛(wèi)星精密測(cè)定軌中的作用.本文在介紹SELENE同波束VLBI觀測(cè)、多普勒數(shù)據(jù)處理和定軌結(jié)果的基礎(chǔ)上,以用于月球采樣返回探測(cè)任務(wù)中的多目標(biāo)探測(cè)器如軌道器、著陸器和返回器為例,給出各探測(cè)器搭載電波源的信標(biāo)設(shè)計(jì)方案及設(shè)計(jì)原則,并分析S頻段多頻點(diǎn)同波束VLBI技術(shù)在軌道器和著陸器繞月飛行、著陸器月球軟著陸、著陸器月球采樣、返回器從月面上升、返回器多次變軌、特別是軌道器和返回器交會(huì)對(duì)接等各個(gè)測(cè)控段的高精度測(cè)定軌或測(cè)定位及月球重力場(chǎng)探測(cè)中的應(yīng)用.
[Abstract]:In the same beam VLBI, the smart multi-frequency beacons emitted by two detectors with small angular distances are simultaneously observed by the main beam of the radio telescope. On the basis of this, the differential phase delay of the two detectors in the order of picosecond between the two stations is obtained. In the determination orbit of the two small satellites Rstar and Vstar of the lunar satellite SELENE, The accuracy of short-arc orbit determination using the same beam VLBI for more than 40 minutes and the ranging data for several hours has been greatly improved, and the orbit determination results of more than one year show that the accuracy of long-arc orbit determination for several days of arc length has reached about 10m. This paper fully proves the role of the same beam VLBI in the precise orbit determination of multi-target satellites. Based on the introduction of the results of SELENE VLBI observation, Doppler data processing and orbit determination, Taking multi-target detectors such as orbiter, lander and returner as examples, the design scheme and design principle of beacons carrying radio wave sources are given. This paper also analyses the S-band multi-frequency point and same beam VLBI technology flying around the moon of orbiter and lander, the lunar soft landing of lander, the lunar sampling of lander, the rise of returner from the lunar surface, and the multiple orbit changes of the returner. Especially, the application of orbit or position measurement and lunar gravity field detection in various measurement and control sections, such as orbiter and returner rendezvous and docking, etc.
【作者單位】： 中國(guó)科學(xué)院上海天文臺(tái);日本國(guó)立天文臺(tái)RISE
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):11043004) 中國(guó)科學(xué)院百人計(jì)劃 國(guó)家高技術(shù)研究發(fā)展計(jì)劃(編號(hào):2008AA12A209,2008AA12A210)資助項(xiàng)目
【分類號(hào)】：P135

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本文編號(hào)：1555946