2 research outputs found

    Expected Accuracy of LEO Navigation Result Coordinate Transformation Using GPS EOP Data

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    GPS๋Š” ์ตœ๊ทผ ํ˜„๋Œ€ํ™” ๊ณ„ํš์˜ ์ผํ™˜์œผ๋กœ ์ƒˆ๋กœ์šด civil ์‹ ํ˜ธ๋ฅผ ์ถ”๊ฐ€ํ•˜๋Š” ์ž‘์—…์„ ์ง„ํ–‰ํ•˜๊ณ  ์žˆ๋‹ค. ์ƒˆ๋กœ์šด civil ์‹ ํ˜ธ๋Š” ๊ธฐ์กด์˜ L1 C/A ์— ์‹ค๋ ค ์žˆ๋Š” ๋ฐฉ์†ก ๋ฉ”์‹œ์ง€๋ฅผ ๋Œ€์‹ ํ•˜์—ฌ ์ƒˆ๋กœ์šด CNAV ๋ฉ”์‹œ์ง€๋ฅผ ๋ฐฉ์†กํ•  ๊ณ„ํš์ธ๋ฐ ์—ฌ๊ธฐ์—๋Š” ์ •๋ฐ€ ์ขŒํ‘œ ๋ณ€ํ™˜์— ํ•„์š”ํ•œ EOP๋ฐ์ดํ„ฐ๊ฐ€ ํฌํ•จ๋˜์–ด ์žˆ๋‹ค. EOP๋ฅผ ์ด์šฉํ•˜์—ฌ ์ขŒํ‘œ ๋ณ€ํ™˜์„ ํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” GPS ์‹œ๊ฐ„์„ UTC์™€ UT1์œผ๋กœ ๋ณ€ํ™˜ํ•˜๊ณ  polar motion, precession, nutation, rotation, frame bias ์ˆœ์œผ๋กœ ๋ณ€ํ™˜ํ–‰๋ ฌ์„ ๊ณ„์‚ฐํ•˜์—ฌ ECEF ์—์„œ ECI๋กœ ์ขŒํ‘œ๋ณ€ํ™˜์„ ์ˆ˜ํ–‰ํ•ด์•ผ ํ•œ๋‹ค. ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ์ •๋ฐ€ ์ขŒํ‘œ ๋ณ€ํ™˜ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ์‚ดํŽด๋ณด๊ณ  ์ด๋ฅผ ์ €๊ถค๋„ ์œ„์„ฑ ๋ฐ์ดํ„ฐ์— ์ ์šฉํ•˜์˜€์„ ๋•Œ ๊ทธ ์ •ํ™•๋„๋ฅผ ์‹œ๋ฎฌ๋ ˆ์ด์…˜์„ ํ†ตํ•ด์„œ ์˜ˆ์ธกํ•˜์—ฌ ๋ณด๊ณ  EOP๋ฅผ ์ด์šฉํ•˜์˜€์„ ๋•Œ์˜ ์œ ์šฉ์„ฑ์„ ์˜ˆ์ธกํ•ด๋ณด์•˜๋‹ค.OAIID:oai:osos.snu.ac.kr:snu2012-01/104/0000003405/21SEQ:21PERF_CD:SNU2012-01EVAL_ITEM_CD:104USER_ID:0000003405ADJUST_YN:NEMP_ID:A000360DEPT_CD:446CITE_RATE:0FILENAME:GPS ๋ฐฉ์†ก EOP ๋ฐ์ดํ„ฐ๋ฅผ ์ด์šฉํ•œ ์ €๊ถค๋„ ์œ„์„ฑ์˜ ํ•ญ๋ฒ•ํ•ด ์ขŒํ‘œ๋ณ€ํ™˜ ์ •ํ™•๋„ ์˜ˆ์ƒ.docDEPT_NM:๊ธฐ๊ณ„ํ•ญ๊ณต๊ณตํ•™๋ถ€EMAIL:[email protected]:

    Development of GPS/Galileo Integrated Receiver Technology for LEO

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    ๋ณธ ๋…ผ๋ฌธ์€ ์ €๊ถค๋„ ์œ„์„ฑ ํ™˜๊ฒฝ์—์„œ ํ™œ์šฉ ๊ฐ€๋Šฅํ•œ GPS/Galileo ๋ณตํ•ฉ ์ˆ˜์‹ ๊ธฐ ๊ธฐ์ˆ  ๊ฐœ๋ฐœ์— ๋Œ€ํ•œ ๊ฒƒ์œผ๋กœ, GPS/Galileo ํ†ตํ•ฉ ์ˆ˜์‹ ๊ธฐ์™€ OD(Onboard Determinator), OOP(Onboard Orbit Propagator)์˜ ๊ฐœ๋ฐœ์„ ํฌํ•จํ•œ๋‹ค. ์ €๊ถค๋„ ์œ„์„ฑ์˜ ๋น ๋ฅธ ์šด๋™์œผ๋กœ ์ธํ•œ ๊ฐ€์‹œ์œ„์„ฑ์˜ ์žฆ์€ ๋ณ€ํ™”, ๋†’์€ ๋„ํ”Œ๋Ÿฌ ๋ณ€ํ™”์œจ ๋“ฑ์„ ๊ณ ๋ คํ•˜์˜€์œผ๋ฉฐ ์ˆ˜์‹  ์‹ ํ˜ธ๋Š” GPS L1/L2C/L5, Galileo E1B/E5a๋ฅผ ํฌํ•จํ•œ๋‹ค. OD, OOP๋Š” GNSS ๋™์—ญํ•™ ๋ชจ๋ธ๊ณผ ๊ถค๋„ ์ •๋ณด๋ฅผ ์ด์šฉํ•˜์—ฌ ์ˆ˜์‹ ๊ธฐ๊ฐ€ ๋น„์ •์ƒ ๋™์ž‘ํ•˜๋Š” ์ƒํ™ฉ์— ๋Œ€๋น„ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•œ๋‹ค. ๊ฐœ๋ฐœ๋œ ๋ณตํ•ฉ ์ˆ˜์‹ ๊ธฐ๋Š” MATLAB ์†Œํ”„ํŠธ์›จ์–ด๋กœ ๊ฐœ๋ฐœ๋˜์—ˆ์œผ๋ฉฐ H/W ์‹œ๋ฎฌ๋ ˆ์ดํ„ฐ ์‹ ํ˜ธ๋ฅผ ์ด์šฉํ•˜์—ฌ ๊ฒ€์ฆ๋œ๋‹ค.OAIID:oai:osos.snu.ac.kr:snu2012-01/104/0000003405/19SEQ:19PERF_CD:SNU2012-01EVAL_ITEM_CD:104USER_ID:0000003405ADJUST_YN:NEMP_ID:A000360DEPT_CD:446CITE_RATE:0FILENAME:2012KGS_paper_๊น€์ข…์›.pdfDEPT_NM:๊ธฐ๊ณ„ํ•ญ๊ณต๊ณตํ•™๋ถ€EMAIL:[email protected]:
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