本文選題：地球同步軌道合成孔徑雷達(dá)　切入點(diǎn)：定軌精度　出處：《系統(tǒng)工程與電子技術(shù)》2017年01期 　論文類型：期刊論文

【摘要】：針對(duì)地球同步軌道合成孔徑雷達(dá)(geosynchronous synthetic aperture radar,GEOSAR)的技術(shù)特點(diǎn)和應(yīng)用需求,進(jìn)行定軌精度要求分析。首先建立GEOSAR定軌誤差模型,定性分析定軌誤差對(duì)斜距及多普勒頻率的影響。然后針對(duì)全誤差公式難以解析求解的問(wèn)題,提出了一種基于蒙特卡羅法分析定軌精度的方法,并給出GEOSAR典型應(yīng)用模式下的定軌精度分析流程。最后針對(duì)中等傾角GEOSAR給出定量的定軌精度要求。仿真表明,GEOSAR成像聚焦所需的徑向位置精度為米級(jí),切向速度精度為10-3 m/s量級(jí),目標(biāo)定位所需的切向位置精度為10m量級(jí),徑向速度精度為10-3 m/s量級(jí),差分干涉所需的徑向位置精度為毫米量級(jí),并且下視角越小,約束越高。
[Abstract]:According to the technical characteristics and application requirements of geosynchronous synthetic aperture radar (GEOSAR), the requirements of orbit determination accuracy are analyzed. Firstly, a GEOSAR orbit determination error model is established. The influence of orbit determination error on oblique distance and Doppler frequency is analyzed qualitatively. Then, a method based on Monte Carlo method is proposed to analyze the orbit determination accuracy. The analytical flow of orbit determination accuracy in typical application mode of GEOSAR is also given. Finally, the quantitative orbit determination accuracy requirement for GEOSAR with medium inclination angle is given. The simulation results show that the radial position accuracy and tangential velocity accuracy are in meter order and 10 ~ (-3) m / s order of magnitude respectively, and the simulation results show that the radial position accuracy is of the order of m and the tangential velocity is 10-3 m / s. The tangential position accuracy is 10m, the radial velocity accuracy is 10-3m / s, the radial position accuracy is millimeter for differential interference, and the lower the angle of view is, the higher the constraint is.
【作者單位】： 中國(guó)科學(xué)院空間信息處理與應(yīng)用系統(tǒng)技術(shù)重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院電子學(xué)研究所;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金(61331017,61101200)資助課題
【分類號(hào)】：TN958
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本文編號(hào)：1574810