{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T18:37:17Z","timestamp":1768070237123,"version":"3.49.0"},"reference-count":17,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2012,8,9]],"date-time":"2012-08-09T00:00:00Z","timestamp":1344470400000},"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>Accelerometers are one of the most important sensors in a strapdown airborne gravimeter. The accelerometer\u2019s drift determines the long-term accuracy of the strapdown inertial navigation system (SINS), which is the primary and most critical component of the strapdown airborne gravimeter. A long-term stability test lasting 104 days was conducted to determine the characteristics of the strapdown airborne gravimeter\u2019s long-term drift. This stability test was based on the first set of strapdown airborne gravimeters built in China, the SGA-WZ. The test results reveal a quadratic drift in the strapdown airborne gravimeter data. A drift model was developed using the static data in the two end sections, and then this model was used to correct the test data. After compensating for the drift, the drift effect improved from 70 mGal to 3.46 mGal with a standard deviation of 0.63 mGal. The quadratic curve better reflects the drift\u2019s real characteristics. In comparison with other methodologies, modelling the drift as a quadratic curve was shown to be more appropriate. Furthermore, this method allows the drift to be adjusted throughout the course of the entire campaign.<\/jats:p>","DOI":"10.3390\/s120811091","type":"journal-article","created":{"date-parts":[[2012,8,9]],"date-time":"2012-08-09T11:22:32Z","timestamp":1344511352000},"page":"11091-11099","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Long-Term Stability of the SGA-WZ Strapdown Airborne Gravimeter"],"prefix":"10.3390","volume":"12","author":[{"given":"Shaokun","family":"Cai","sequence":"first","affiliation":[{"name":"College of Mechatronics and Automation, National University of Defense Technology, Changsha 410072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaidong","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Mechatronics and Automation, National University of Defense Technology, Changsha 410072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Meiping","family":"Wu","sequence":"additional","affiliation":[{"name":"College of Mechatronics and Automation, National University of Defense Technology, Changsha 410072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yangming","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Mechatronics and Automation, National University of Defense Technology, Changsha 410072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2012,8,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1007\/s00190-010-0366-6","article-title":"New results in airborne vector gravimetry using strapdown INS\/DGPS","volume":"84","author":"Senobari","year":"2010","journal-title":"J. Geod"},{"key":"ref_2","unstructured":"Zhang, K.D. (2007). Research on the Methods of Airborne Gravimetry Based on SINS\/DGPS. [Ph.D. Dissertation, National University of Defense Technology]."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"323","DOI":"10.1007\/s001900050171","article-title":"Flight test results from a strapdown airborne gravity system","volume":"72","author":"Wei","year":"1998","journal-title":"J. Geod"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1007\/s001900000082","article-title":"A comparison of stable platform and stapdown airborne gravity","volume":"74","author":"Glennie","year":"2000","journal-title":"J. Geod"},{"key":"ref_5","unstructured":"Kreye, C., Hein, G.W., and Zimmermann, B. (September, January 30). Evaluation of Airborne Vector Gravimetry Integrating GNSS and Strapdown INS Observations. Porto, Portugal."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Kreye, C., Hein, G.W., and Zimmermann, B. (2006). Evaluation of airborne vector gravimetry using GNSS and SDINS observations. Obs. Earth Syst. Space.","DOI":"10.1007\/3-540-29522-4_29"},{"key":"ref_7","unstructured":"Boedecker, G. (2004, January 5). SAGS4: The New Strapdown Airborne Gravimetry System Prototype. Potsdam, Germany."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Boedecker, G., and St\u00fcrze, A. (2006). SAGS4-Strapdown airborne gravimetry system analysis. Obs. Earth Syst. Space.","DOI":"10.1007\/3-540-29522-4_30"},{"key":"ref_9","first-page":"1538","article-title":"The research on quality evaluation method of test repeat lines in airborne gravity survey","volume":"51","author":"Guo","year":"2008","journal-title":"Chin. J. Geophys"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1573","DOI":"10.1016\/j.cageo.2006.02.015","article-title":"Data reduction in scalar airborne gravimetry: Theory, software and case study in Taiwan","volume":"32","author":"Hwang","year":"2006","journal-title":"Comput. Geosci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1007\/s00190-008-0249-2","article-title":"A method of error adjustment for marine gravity with application to mean dynamic topography in the Northern North Atlantic","volume":"83","author":"Hunegnaw","year":"2005","journal-title":"J. Geod"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"690","DOI":"10.1007\/s001900000130","article-title":"A new approach for airborne vector gravimetry using GPS\/INS","volume":"74","author":"Kwon","year":"2000","journal-title":"J. Geod"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"I1","DOI":"10.1190\/1.2821155","article-title":"Ground-vehicle INS\/DGPS vector gravimetry","volume":"73","author":"Li","year":"2008","journal-title":"Geophysics"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"3533","DOI":"10.1029\/1999GL010830","article-title":"Results of airborne vector (3-D)","volume":"26","author":"Jekeli","year":"1999","journal-title":"Geophys. Res. Lett."},{"key":"ref_15","first-page":"383","article-title":"Accuracy of the relative gravity measurement","volume":"6","author":"Martin","year":"2009","journal-title":"Acta Geodyn. Geomater"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1005","DOI":"10.1016\/S0098-3004(02)00005-5","article-title":"Adjustment of relative gravity measurements using weighted and datum-free constraints","volume":"28","author":"Hwang","year":"2001","journal-title":"Comput. Geosci."},{"key":"ref_17","unstructured":"Zhang, K.D., Wu, M.P., and Cao, J.L. (October, January 18\u2013). The Status of Strapdown Airborne Gravimeter SGA-WZ. Nanjing, China."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/12\/8\/11091\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:51:42Z","timestamp":1760219502000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/12\/8\/11091"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,8,9]]},"references-count":17,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2012,8]]}},"alternative-id":["s120811091"],"URL":"https:\/\/doi.org\/10.3390\/s120811091","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,8,9]]}}}