民航气象报文解码程序代码.doc

METAR Decoding Page!-/!CDATA var m3_u = (tocol=https:?/www/delivery/ajs.php:/www/delivery/ajs.php); var m3_r = Math.floor(Math.random()*99999999999); if (!document.MAX_used) document.MAX_used = ,; document.write ();/-function add_output(text) document.encoded.decreport.value = document.encoded.decreport.value + text;function is_num_digit(ch) return ( (ch = 0) | (ch = 1) | (ch = 2) | (ch = 3) | (ch = 4) | (ch = 5) | (ch = 6) | (ch = 7) | (ch = 8) | (ch = 9) );function is_alphabetic_char(ch) return ( (ch = A) & (ch 5) & (typeof myArray6 != undefined) ) if(myArray6=U) add_output(, and increasing); else if(myArray6=D) add_output(, and decreasing); add_output(n); return; / Check if token is CAVOK if(token = CAVOK) add_output(CAVOK conditions: Visibility 10 km or more,n no cloud below 5.000 feet or below the MSA (whichever is greater), n no cumulonimbus, and no significant weather fenomena inn the aerodrome or its vicinityn); return; / Check if token is NOSIG if(token = NOSIG) add_output(No significant changes expected in the near futuren); return; / Check if token is a present weather code - The regular expression is a bit / long, because several precipitation types can be joined in a token, and I / dont see a better way to get all the codes. var reWX = /(-|+)?(VC)?(MI|BC|BL|SH|TS|FZ|PR)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS|BR|FG|FU|VA|DU|SA|HZ|PO|SQ|FC|SS|DS)$/; if(reWX.test(token) add_output(Weather: ); var myArray = reWX.exec(token); for(var i=1;imyArray.length; i+) if(myArrayi = -) add_output(Light ); if(myArrayi = +) add_output(Strong ); if(myArrayi = VC) add_output(In the vicinity, ); if(myArrayi = MI) add_output(Shallow ); if(myArrayi = BC) add_output(Patches of ); if(myArrayi = SH) add_output(Showers of ); if(myArrayi = TS) add_output(Thunderstorms ); if(myArrayi = FZ) add_output(Freezing (or super-cooled) ); if(myArrayi = PR) add_output(Partial ); if(myArrayi = DZ) add_output(Drizzle ); if(myArrayi = RA) add_output(Rain ); if(myArrayi = SN) add_output(Snow ); if(myArrayi = SG) add_output(Snow grains ); if(myArrayi = IC) add_output(Ice Crystals ); if(myArrayi = PL) add_output(Ice Pellets ); if(myArrayi = GR) add_output(Hail ); if(myArrayi = GS) add_output(Small hail ( 5 mm diameter) and/or snow pellets ); if(myArrayi = BR) add_output(Mist ); if(myArrayi = FG) add_output(Fog ); if(myArrayi = FU) add_output(Smoke ); if(myArrayi = VA) add_output(Volcanic Ash ); if(myArrayi = DU) add_output(Widespread dust ); if(myArrayi = SA) add_output(Sand ); if(myArrayi = HZ) add_output(Haze ); if(myArrayi = PO) add_output(Dust/Sand whirls ); if(myArrayi = SQ) add_output(Squall ); if(myArrayi = FC) add_output(Funnel clouds ); if(myArrayi = SS) add_output(Sandstorm ); if(myArrayi = DS) add_output(Duststorm ); add_output(n); return; / Check if token is recent weather observation var reREWX = /RE(-|+)?(VC)?(MI|BC|BL|SH|TS|FZ|PR)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS)?(DZ|RA|SN|SG|IC|PL|GR|GS|BR|FG|FU|VA|DU|SA|HZ|PO|SQ|FC|SS|DS)?$/; if(reREWX.test(token) add_output(Since the previous observation (but not at present), the followingnmeteorological phenomena were observed: ); var myArray = reREWX.exec(token); for(var i=1;imyArray.length; i+) if(myArrayi = -) add_output(Light ); if(myArrayi = +) add_output(Strong ); if(myArrayi = VC) add_output(In the vicinity, ); if(myArrayi = MI) add_output(Shallow ); if(myArrayi = BC) add_output(Patches of ); if(myArrayi = SH) add_output(Showers of ); if(myArrayi = TS) add_output(Thunderstorms ); if(myArrayi = FZ) add_output(Freezing (or super-cooled) ); if(myArrayi = PR) add_output(Partial ); if(myArrayi = DZ) add_output(Drizzle ); if(myArrayi = RA) add_output(Rain ); if(myArrayi = SN) add_output(Snow ); if(myArrayi = SG) add_output(Snow grains ); if(myArrayi = IC) add_output(Ice Crystals ); if(myArrayi = PL) add_output(Ice Pellets ); if(myArrayi = GR) add_output(Hail ); if(myArrayi = GS) add_output(Small hail ( 5 mm diameter) and/or snow pellets ); if(myArrayi = BR) add_output(Mist ); if(myArrayi = FG) add_output(Fog ); if(myArrayi = FU) add_output(Smoke ); if(myArrayi = VA) add_output(Volcanic Ash ); if(myArrayi = DU) add_output(Widespread dust ); if(myArrayi = SA) add_output(Sand ); if(myArrayi = HZ) add_output(Haze ); if(myArrayi = PO) add_output(Dust/Sand whirls ); if(myArrayi = SQ) add_output(Squall ); if(myArrayi = FC) add_output(Funnel clouds ); if(myArrayi = SS) add_output(Sandstorm ); if(myArrayi = DS) add_output(Duststorm ); add_output(n); return; / Check if token is temperature / dewpoint pair var reTempDew = /(M?dd|/)/(M?dd)?$/; if(reTempDew.test(token) var myArray = reTempDew.exec(token); if(myArray1.charAt(0)=M) add_output(Temperature: - + myArray1.substr(1,2) + degrees Celsiusn); else add_output(Temperature: + myArray1.substr(0,2) + degrees Celsiusn); if(myArray2!=) if(myArray2.charAt(0)=M) add_output(Dewpoint: - + myArray2.substr(1,2) + degrees Celsiusn); else add_output(Dewpoint: + myArray2.substr(0,2) + degrees Celsiusn); return; / Check if token is sky clear indication if(token=SKC) add_output(Clear skyn); return; / Check if token is vertical visibility indication var reVV = /VV(d3|/3)$/; if(reVV.test(token) / VVddd - ddd is vertical distance, or / if unspecified var myArray = reVV.exec(token); add_output(Sky is obscured - vertical visibility); if(myArray1 = /) add_output( cannot be assessedn); else add_output(: + (100*parseInt(myArray1,10) + feetn); return; / Check if token is cloud indication var reCloud = /(FEW|SCT|BKN|OVC)(d3)(CB|TCU)?$/; if(reCloud.test(token) / Clouds: aaadddkk - aaa indicates amount of sky covered, ddd distance over / aerodrome level, and kk the type of cloud. var myArray = reCloud.exec(token); add_output(Clouds: ); if(myArray1 = FEW) add_output(A few ); else if(myArray1 = SCT) add_output(Scattered ); else if(myArray1 = BKN) add_output(Broken sky ); else if(myArray1 = OVC) add_output(Overcast sky ); add_output(, at + (100*parseInt(myArray2,10) + feet above aerodrome level); if(myArray3 = CB) add_output(, cumulonimbus); else if(myArray3 = TCU) add_output(, towering cumulus); add_output(n); return; / Check if token is part of a wind-shear indication var reRWY = /RWY(d2)(L|C|R)?$/; if(token=WS) add_output(There is wind-shear in ); return; else if(token=ALL) add_output(all ); return; else if(token=RWY) add_output(runwaysn); return; else if (reRWY.test(token) var myArray = reRWY.exec(token); add_output(runway +myArray1); if(myArray2=L) add_output( Left); else if(myArray2=C) add_output( Central); else if(myArray2=R) add_output( Right); add_output(n); return; / Check if token is no-significant-weather indication if(token=NSW) add_output(No significant weather phenomena are observed at presentn); return; / Check if token is no-significant-clouds indication if(token=NSC) add_output(No significant clouds are observed below 5000 feet or below the minimum sector altitude (whichever is higher)n); return; / Check if token is part of trend indication if(token=BECMG) add_output(The following weather phenomena are expected to arise soon:n); return; if(token=TEMPO) add_output(The following weather phenomena are expected to arise temporarily:n); return; var reFM = /FM(d2)(d2)Z?$/; if(reFM.test(token) var myArray = reFM.exec(token); add_output( From +myArray1+:+myArray2+ UTC, ); return; var reTL = /TL(d2)(d2)Z?$/; if(reTL.test(token) var myArray = reTL.exec(token); add_output(Until +myAr