{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T02:14:49Z","timestamp":1775700889548,"version":"3.50.1"},"reference-count":30,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2013,4,3]],"date-time":"2013-04-03T00:00:00Z","timestamp":1364947200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The GNSS derived Zenith Tropospheric Delay (ZTD) plays today a very critical role in meteorological study and weather forecasts, as ZTDs of thousands of GNSS stations are operationally assimilated into numerical weather prediction models. Recently, the Chinese BeiDou Navigation Satellite System (BDS) was officially announced to provide operational services around China and its neighborhood and it was demonstrated to be very promising for precise navigation and positioning. In this contribution, we concentrate on estimating ZTD using BDS observations to assess its capacity for troposphere remote sensing. A local network which is about 250 km from Beijing and comprised of six stations equipped with GPS- and BDS-capable receivers is utilized. Data from 5 to 8 November 2012 collected on the network is processed in network mode using precise orbits and in Precise Point Positioning mode using precise orbits and clocks. The precise orbits and clocks are generated from a tracking network with most of the stations in China and several stations around the world. The derived ZTDs are compared with that estimated from GPS data using the final products of the International GNSS Service (IGS). The comparison shows that the bias and the standard deviation of the ZTD differences are about 2 mm and 5 mm, respectively, which are very close to the differences of GPS ZTD estimated using different software packages.<\/jats:p>","DOI":"10.3390\/s130404514","type":"journal-article","created":{"date-parts":[[2013,4,3]],"date-time":"2013-04-03T11:51:12Z","timestamp":1364989872000},"page":"4514-4526","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Estimating Zenith Tropospheric Delays from BeiDou Navigation Satellite System Observations"],"prefix":"10.3390","volume":"13","author":[{"given":"Aigong","family":"Xu","sequence":"first","affiliation":[{"name":"School of Geomatics, Liaoning Technical University, No. 47 Zhonghua Road, Fuxin 123000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zongqiu","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Geomatics, Liaoning Technical University, No. 47 Zhonghua Road, Fuxin 123000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maorong","family":"Ge","sequence":"additional","affiliation":[{"name":"Department of Geodesy and Remote Sensing, German Research Center for Geosciences,  Potsdam 14473, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinchao","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Geomatics, Liaoning Technical University, No. 47 Zhonghua Road, Fuxin 123000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huizhong","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Geomatics, Liaoning Technical University, No. 47 Zhonghua Road, Fuxin 123000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xin","family":"Sui","sequence":"additional","affiliation":[{"name":"School of Geomatics, Liaoning Technical University, No. 47 Zhonghua Road, Fuxin 123000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2013,4,3]]},"reference":[{"key":"ref_1","unstructured":"Ran, C. (2010, January 19\u201321). COMPASS Satellite System Development and Plan. Beijing, China."},{"key":"ref_2","unstructured":"China Satellite Navigation Office Available online: http:\/\/gge.unb.ca\/test\/beidou_icd_english.pdf."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Montenbruck, O., Hauschild, A., Steigenberger, P., Hugentobler, U., Teunissen, P., and Nakamura, S. (2012). Initial assessment of the COMPASS\/BeiDou-2 regional navigation satellite system. GPS Sol.","DOI":"10.1007\/s10291-012-0272-x"},{"key":"ref_4","unstructured":"Steigenberger, P., Hauschild, A., Montenbruck, O., and Hugentobler, U. (2012, January 23\u201327). Performance Analysis of COMPASS Orbit and Clock Determination and COMPASS-Only PPP. Olsztyn, Poland."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1079","DOI":"10.1007\/s11430-012-4446-8","article-title":"Precise orbit determination of BeiDou Satellites with precise positioning","volume":"55","author":"Shi","year":"2012","journal-title":"Sci. China Earth Sci."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Zhao, Q., Guo, J., Li, M., Qu, L., Hu, Z., Shi, C., and Liu, J. (2013). Initial results of precise orbit and clock determination for COMPASS navigation satellite system. J. Geod.","DOI":"10.1007\/s00190-013-0622-7"},{"key":"ref_7","unstructured":"Ge, M., Zhang, H.P., Jia, X.L., Song, S.L., and Wickert, J. (2012, January 17\u201321). What Is Achievable with the Current COMPASS Constellation?. Nashville, Tennessee."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2911","DOI":"10.3390\/s130302911","article-title":"Experimental Study on the Precise Orbit Determination of the BeiDou Navigation Satellite System","volume":"13","author":"He","year":"2013","journal-title":"Sensors"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"5005","DOI":"10.1029\/96JB03860","article-title":"Precise point positioning for the efficient and robust analysis of GPS data from large networks","volume":"102","author":"Zumberge","year":"1997","journal-title":"J. Geophys. Res."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1007\/s10291-012-0264-x","article-title":"Precise relative positioning using real tracking data from COMPASS GEO and IGSO satellites","volume":"17","author":"Shi","year":"2013","journal-title":"GPS Sol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"15787","DOI":"10.1029\/92JD01517","article-title":"GPS meteorology: Remote sensing of atmospheric water vapor using the Global Positioning System","volume":"97","author":"Bevis","year":"1992","journal-title":"J. Geophys. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1547","DOI":"10.1175\/1520-0450(2003)042<1547:AAVOGT>2.0.CO;2","article-title":"Accuracy and variability of GPS tropospheric delay measurements of water vapor in the western Mediterranean","volume":"42","author":"Haase","year":"2003","journal-title":"J. Appl. Meteorol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"264","DOI":"10.1016\/j.jastp.2008.11.018","article-title":"Systematic errors between VLBI and GPS precipitable water vapor estimations from 5-year co-located measurements","volume":"71","author":"Jin","year":"2009","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1007\/s00190-010-0434-y","article-title":"Multi-technique comparison of troposphere zenith delays and gradients during CONT08","volume":"85","author":"Teke","year":"2011","journal-title":"J. Geod."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"351","DOI":"10.2151\/jmsj.2004.351","article-title":"Rapid retrieval and assimilation of ground-based GPS precipitable water observations at the NOAA forecast systems laboratory: Impact on weather forecasts","volume":"82","author":"Gutman","year":"2004","journal-title":"J. Meteor. Soc. Jpn."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2706","DOI":"10.1175\/MWR-D-11-00156.1","article-title":"Operational Assimilation of GPS Zenith Total Delay Observations into the Met Office Numerical Weather Prediction Models","volume":"140","author":"Bennitt","year":"2012","journal-title":"Mon. Weather Rev."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"D06303","DOI":"10.1029\/2008JD011008","article-title":"Estimates of the information provided by GPS slant data observed in Germany regarding tomographic applications","volume":"114","author":"Bender","year":"2009","journal-title":"J. Geophys. Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"190","DOI":"10.1016\/j.asr.2010.01.017","article-title":"Effects of physical correlations on long-distance GPS positioning and zenith tropospheric delay estimates","volume":"46","author":"Jin","year":"2010","journal-title":"Adv. Space Res."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"603","DOI":"10.1007\/BF02899825","article-title":"PANDA software and its preliminary result of positioning and orbit determination","volume":"8","author":"Liu","year":"2003","journal-title":"J. Nat. Sci. Wuhan Univ."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Shi, C., Zhao, Q., Geng, J., Lou, Y., Ge, M., and Liu, J. (2008, January 28). Recent Development of PANDA Software in GNSS Data Processing. Wuhan, China.","DOI":"10.1117\/12.816261"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3583","DOI":"10.1029\/98GL02755","article-title":"GPS meteorology: Reducing systematic errors in geodetic estimates for zenith delay","volume":"25","author":"Fang","year":"1998","journal-title":"Geophys. Res. Lett."},{"key":"ref_22","first-page":"191","article-title":"The International GNSS Service in a changing landscape of Global Navigation Satellite Systems","volume":"83","author":"Dow","year":"2009","journal-title":"J. Geof."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"781","DOI":"10.1007\/s00190-007-0148-y","article-title":"Generation of a consistent absolute phase-center correction model for GPS receiver and satellite antennas","volume":"81","author":"Schmid","year":"2007","journal-title":"J. Geod."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"679","DOI":"10.1007\/s00190-007-0135-3","article-title":"Short Note: A global model of pressure and temperature for geodetic applications","volume":"81","author":"Boehm","year":"2007","journal-title":"J. Geod."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"B02406","DOI":"10.1029\/2005JB003629","article-title":"Troposphere mapping functions for GPS and very long baseline interferometry from European Centre for Medium-Range Weather Forecasts operational analysis data","volume":"111","author":"Boehm","year":"2006","journal-title":"J. Geophys. Res."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"5019","DOI":"10.1029\/97JB03534","article-title":"Estimating horizontal gradients of tropospheric path delay with a single GPS receiver","volume":"103","author":"Kroger","year":"1998","journal-title":"J. Geophys. Res."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/S1464-1895(01)00045-X","article-title":"Towards an operational near real-time precipitable water vapor estimation","volume":"26","author":"Dousa","year":"2001","journal-title":"Phys. Chem. Earth A"},{"key":"ref_28","unstructured":"Melbourne, W.G. (1985, January 15\u201319). The Case for Ranging in GPS-based Geodetic Systems. Rockville, MD, USA."},{"key":"ref_29","unstructured":"W\u00fcbbena, G. (1985, January 15\u201319). Software Developments for Geodetic Positioning with GPS using TI-4100 Code and Carrier Measurements. Rockville, MD, USA."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"28701","DOI":"10.1029\/98JD02516","article-title":"Accuracy of absolute precipitable water vapor estimates from GPS observations","volume":"103","author":"Tregoning","year":"1998","journal-title":"J. Geophys. Res."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/4\/4514\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:45:55Z","timestamp":1760219155000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/4\/4514"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,4,3]]},"references-count":30,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2013,4]]}},"alternative-id":["s130404514"],"URL":"https:\/\/doi.org\/10.3390\/s130404514","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2013,4,3]]}}}