Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer
In this study, global positioning system (GPS)-derived precipitable water vapor (PWV) and microwave radiometer (MWR)-measured integrated water vapor (IWV) were compared and their characteristics were analyzed. Comparing those two quantities for two years from August 2009, we found that GPS PWV est...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2012-03-01
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| Series: | Journal of Astronomy and Space Sciences |
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| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2012/v29n1/OJOOBS_2012_v29n1_1.pdf |
| _version_ | 1827393856350453760 |
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| author | Dong-Hyo Sohn Kwan-Dong Park Jihye Won Jungho Cho Kyoung-Min Roh |
| author_facet | Dong-Hyo Sohn Kwan-Dong Park Jihye Won Jungho Cho Kyoung-Min Roh |
| author_sort | Dong-Hyo Sohn |
| collection | DOAJ |
| description | In this study, global positioning system (GPS)-derived precipitable water vapor (PWV) and microwave radiometer
(MWR)-measured integrated water vapor (IWV) were compared and their characteristics were analyzed. Comparing
those two quantities for two years from August 2009, we found that GPS PWV estimates were larger than MWR IWV. The
average difference
over the entire test period was 1.1 mm and the standard deviation was 1.2 mm. When the discrepancies
between GPS PWV and MWR IWV were analyzed depending on season, the average difference was 0.7 mm and 1.9
mm in the winter and summer months, respectively. Thus, the average difference was about 2.5 times larger in summer
than that in winter. However, MWR IWV measurements in the winter months were over-estimated than those in the summer
months as the water vapor content got larger. The results of the diurnal analysis showed that MWR IWV was underestimated
in the daytime, showing a difference of 0.8 mm. In the early morning hours, MWR IWV has a tendency to be
over-estimated, with a difference of 1.3 mm with respect to GPS PWV. |
| first_indexed | 2024-03-08T17:57:29Z |
| format | Article |
| id | doaj.art-ac26f9b6260b4dae820c810e46e2c8ee |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:57:29Z |
| publishDate | 2012-03-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-ac26f9b6260b4dae820c810e46e2c8ee2024-01-02T04:10:08ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092012-03-0129111010.5140/JASS.2012.29.1.001Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave RadiometerDong-Hyo Sohn0Kwan-Dong Park1Jihye Won2Jungho Cho3Kyoung-Min Roh4Department of Geoinformatic Engineering, Inha University, Incheon 402-751, KoreaDepartment of Geoinformatic Engineering, Inha University, Incheon 402-751, KoreaDepartment of Geoinformatic Engineering, Inha University, Incheon 402-751, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaIn this study, global positioning system (GPS)-derived precipitable water vapor (PWV) and microwave radiometer (MWR)-measured integrated water vapor (IWV) were compared and their characteristics were analyzed. Comparing those two quantities for two years from August 2009, we found that GPS PWV estimates were larger than MWR IWV. The average difference over the entire test period was 1.1 mm and the standard deviation was 1.2 mm. When the discrepancies between GPS PWV and MWR IWV were analyzed depending on season, the average difference was 0.7 mm and 1.9 mm in the winter and summer months, respectively. Thus, the average difference was about 2.5 times larger in summer than that in winter. However, MWR IWV measurements in the winter months were over-estimated than those in the summer months as the water vapor content got larger. The results of the diurnal analysis showed that MWR IWV was underestimated in the daytime, showing a difference of 0.8 mm. In the early morning hours, MWR IWV has a tendency to be over-estimated, with a difference of 1.3 mm with respect to GPS PWV.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2012/v29n1/OJOOBS_2012_v29n1_1.pdfglobal positioning systemmicrowave radiometerprecipitable water vapordiurnal variation |
| spellingShingle | Dong-Hyo Sohn Kwan-Dong Park Jihye Won Jungho Cho Kyoung-Min Roh Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer Journal of Astronomy and Space Sciences global positioning system microwave radiometer precipitable water vapor diurnal variation |
| title | Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer |
| title_full | Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer |
| title_fullStr | Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer |
| title_full_unstemmed | Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer |
| title_short | Comparison of the Characteristics of Precipitable Water Vapor Measured by Global Positioning System and Microwave Radiometer |
| title_sort | comparison of the characteristics of precipitable water vapor measured by global positioning system and microwave radiometer |
| topic | global positioning system microwave radiometer precipitable water vapor diurnal variation |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2012/v29n1/OJOOBS_2012_v29n1_1.pdf |
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