機載光電探測系統的動態測試, 除以地面真實目標作為背景之外, 其性能的量化考核和驗證主要是通過外場標準多用途目標靶來進行伴同試驗。其中MRTD 是使用得最普遍的綜合性能指標參數, 它考慮了系統各個環節及人眼睛的工作特性, 能較全面地反映系統的質量。度量機載FL IR 傳感器靈敏度特性的另一個指標是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的漸近探測來完成, 而改變目標自身的尺寸大小或放置不同尺寸的目標, 對于依次漸近目標進行MDTD 測量是有利的。
關鍵詞: FL IR; 激光測距; 電視系統;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