機(jī)載光電探測系統(tǒng)的動態(tài)測試, 除以地面真實(shí)目標(biāo)作為背景之外, 其性能的量化考核和驗證主要是通過外場標(biāo)準(zhǔn)多用途目標(biāo)靶來進(jìn)行伴同試驗。其中MRTD 是使用得最普遍的綜合性能指標(biāo)參數(shù), 它考慮了系統(tǒng)各個環(huán)節(jié)及人眼睛的工作特性, 能較全面地反映系統(tǒng)的質(zhì)量。度量機(jī)載FL IR 傳感器靈敏度特性的另一個指標(biāo)是MDTD。研究表明, 對于MDTD 的
外場測量最好選用一個飛行架次和多次對目標(biāo)的漸近探測來完成, 而改變目標(biāo)自身的尺寸大小或放置不同尺寸的目標(biāo), 對于依次漸近目標(biāo)進(jìn)行MDTD 測量是有利的。
關(guān)鍵詞: FL IR; 激光測距; 電視系統(tǒng);MRTD;MDTD; 大氣透過率
Abstract:A irbo rne elect ro2op t ical detect ing system s’ dynam ic teste, besides tak ing real ground ob ject s as the background target s, are m ade by term s of the stanedard m u lt i2funct ion ou tdoo r target app lied in the system characterist ic test quan t itat ively. MRTD is one of the w idely app lied syn thet ic qualif icat ion s,w h ich syn thesizes the system ’s facto rs and the eye’s characterist ics of m an, ab le to reveal the system ’s quality.
A no ther qualif icat ion to m easu re airbo rne FL IR sen sit ivity isMDTD. The researches show thatMDTD is varying w ith the area size of the target, the temperatu re difference betw een the target and background, and the therm al no ises, so it is best to take one t im e of f ligh t test and several t im es of app roach ing the target fo rMDTD m easu ring. A nd it is very sign if ican t to change the sizes of the target o r pu t variou s target s, w h ich have differen t sizes, fo rMDTD m easu ring at app roach ing the target in tu rn.
Key words: FL IR, laser ranging, TV system ,MRTD,MDTD, atmo sphere t ran sm it tance