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«.«‘∑¬. ¡¢. 39(1) 130-136 (2554) KKU Sci. J.39(1) 130-136 (2011)<br />

°“√§”π«≥ª√‘¡“≥‰ÕπÈ”°≈—Ëπµ—«‰¥â„π∫√√¬“°“»<br />

¢Õߪ√–‡∑»‰∑¬<br />

Calculation of Precipitable Water Vapor<br />

in the Atmosphere of Thailand<br />

“¬—πµå ‚æ∏‘χ°µÿ 1<br />

∫∑§—¥¬àÕ<br />

„πß“π«‘®—¬π’È¡’«—µ∂ÿª√– ߧå‡æ◊ËÕ§”π«≥À“ª√‘¡“≥‰ÕπÈ”°≈—Ëπµ—«‰¥â„π∫√√¬“°“»¢Õߪ√–‡∑»‰∑¬ ª√‘¡“≥<br />

‰ÕπÈ”°≈—Ëπµ—«‰¥â§”π«≥‰¥â®“°¢âÕ¡Ÿ≈§«“¡◊Èπ —¡æ—∑∏å ·≈–Õÿ≥À¿Ÿ¡‘Õ“°“»∑’ˉ¥â®“°°“√µ√«®Õ“°“»—Èπ∫π´÷Ëß¡’<br />

°“√µ√«®«—¥∑’Ë ∂“π’Õÿµÿπ‘¬¡«‘∑¬“®—ßÀ«—¥‡’¬ß„À¡à ∂“π’Õÿµÿπ‘¬¡«‘∑¬“®—ßÀ«—¥Õÿ∫≈√“∏“π’ ∂“π’Õÿµÿπ‘¬¡«‘∑¬“<br />

®—ßÀ«—¥ ߢ≈“ ·≈–°√¡Õÿµÿπ‘¬¡«‘∑¬“ °√ÿ߇∑æ¡À“π§√ ‚¥¬„â¢âÕ¡Ÿ≈∑’˵√«®«—¥µàÕ‡π◊ËÕß°—π„πà«ßªï æ.». 2535<br />

∂÷ß æ.». 2550 ‡¡◊ËÕπ”ª√‘¡“≥‰ÕπÈ”∑’ˉ¥â®“°¢âÕ¡Ÿ≈µ√«®Õ“°“»—Èπ∫π∑—Èß 4 ∂“π’¥—ß°≈à“«¡“À“§«“¡ —¡æ—π∏å°—∫<br />

§«“¡◊Èπ —¡æ—∑∏å·≈–Õÿ≥À¿Ÿ¡‘¢ÕßÕ“°“»´÷Ë߇ªìπ¢âÕ¡Ÿ≈¿“§æ◊Èπ¥‘π∑’Ë ∂“𒇥’¬«°—π„π√Ÿª·∫∫®”≈Õß∑“ߧ≥‘µ»“ µ√å<br />

º≈∑’ˉ¥âæ∫«à“ ‡¡◊ËÕ»÷°…“°“√·ª√§à“µ“¡‡«≈“„π√Õ∫ªïæ∫«à“∑’Ë ∂“π’‡’¬ß„À¡à Õÿ∫≈√“∏“π’ ·≈–°√ÿ߇∑æ¡À“π§√<br />

¡’≈—°…≥–°“√·ª√§à“§≈⓬§≈÷ß°—π °≈à“«§◊Õ ®–¡’§à“¡“°„πà«ßƒ¥ŸΩπ ·≈–®–¡’§à“πâÕ¬„πà«ßƒ¥Ÿ·≈âß ”À√—∫<br />

∂“π’ ߢ≈“¡’§à“‡°◊Õ∫§ß∑’˵≈Õ¥∑—Èßªï §à“ª√‘¡“≥‰ÕπÈ”∑’ˉ¥â®“°¢âÕ¡Ÿ≈°“√µ√«®Õ“°“»—Èπ∫π®–¡’§à“„°≈⇧’¬ß°—∫<br />

§à“ª√‘¡“≥‰ÕπÈ”∑’ˉ¥â®“°·∫∫®”≈Õß‚¥¬¡’§«“¡·µ°µà“ß„π√Ÿª¢Õß Root Mean Square Error (RMSE) ‡∑à“°—∫<br />

0.354 ‡´πµ‘‡¡µ√ ®“°π—ÈπºŸâ«‘®—¬π”·∫∫®”≈Õß∑’ˉ¥â‰ª§”π«≥§à“ª√‘¡“≥‰ÕπÈ”°≈—Ëπµ—«‰¥â®“°¢âÕ¡Ÿ≈¿“§æ◊Èπ¥‘π∑’Ë<br />

∂“π’Õÿµÿπ‘¬¡«‘∑¬“ 85 ·Ààß∑—Ë«ª√–‡∑» º≈∑’ˉ¥âæ∫«à“ª√‘¡“≥‰ÕπÈ”°≈—Ëπµ—«‰¥â¡’§à“‡ª≈’ˬπ·ª≈ßÕ¬Ÿà„πà«ß 2.431<br />

‡´πµ‘‡¡µ√ - 6.146 ‡´πµ‘‡¡µ√ ‚¥¬¡’§à“πâÕ¬„πà«ßƒ¥Ÿ·≈âß (惻®‘°“¬π - ¡’π“§¡) ·≈–¡’§à“¡“°„πà«ßƒ¥ŸΩπ<br />

(‡¡…“¬π - µÿ≈“§¡) ‚¥¬¡’§à“‡©≈’ˬµàÕªï‡∑à“°—∫ 4.571±0.107 ‡´πµ‘‡¡µ√<br />

1<br />

“¢“«‘“øî ‘° åª√–¬ÿ°µå §≥–«‘»«°√√¡»“ µ√å ¡À“«‘∑¬“≈—¬‡∑§‚π‚≈¬’√“¡ß§≈Õ’ “π «‘∑¬“‡¢µ¢Õπ·°àπ Õ.‡¡◊Õß ®.¢Õπ·°àπ<br />

40000<br />

E-mail: syphokate@hotmail.com

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