{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T14:31:26Z","timestamp":1774276286357,"version":"3.50.1"},"reference-count":19,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2014,10,8]],"date-time":"2014-10-08T00:00:00Z","timestamp":1412726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Star trackers are currently the most accurate spacecraft attitude sensors. As a result, they are widely used in remote sensing satellites. Since traditional charge-coupled device (CCD)-based star trackers have a limited sensitivity range and dynamic range, the matching process for a star tracker is typically not very sensitive to star brightness. For active pixel sensor (APS) star trackers, the intensity of an imaged star is valuable information that can be used in star identification process. In this paper an improved brightness referenced star identification algorithm is presented. This algorithm utilizes the k-vector search theory and adds imaged stars\u2019 intensities to narrow the search scope and therefore increase the efficiency of the matching process. Based on different imaging conditions (slew, bright bodies, etc.) the developed matching algorithm operates in one of two identification modes: a three-star mode, and a four-star mode. If the reference bright stars (the stars brighter than three magnitude) show up, the algorithm runs the three-star mode and efficiency is further improved. The proposed method was compared with other two distinctive methods the pyramid and geometric voting methods. All three methods were tested with simulation data and actual in orbit data from the APS star tracker of ZY-3. Using a catalog composed of 1500 stars, the results show that without false stars the efficiency of this new method is 4~5 times that of the pyramid method and 35~37 times that of the geometric method.<\/jats:p>","DOI":"10.3390\/s141018498","type":"journal-article","created":{"date-parts":[[2014,10,8]],"date-time":"2014-10-08T11:07:14Z","timestamp":1412766434000},"page":"18498-18514","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["A Brightness-Referenced Star Identification Algorithm for APS Star Trackers"],"prefix":"10.3390","volume":"14","author":[{"given":"Peng","family":"Zhang","sequence":"first","affiliation":[{"name":"GNSS Research Center, Wuhan University, No.129 Luoyu Road, Wuhan 430079, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qile","family":"Zhao","sequence":"additional","affiliation":[{"name":"GNSS Research Center, Wuhan University, No.129 Luoyu Road, Wuhan 430079, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingnan","family":"Liu","sequence":"additional","affiliation":[{"name":"GNSS Research Center, Wuhan University, No.129 Luoyu Road, Wuhan 430079, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ning","family":"Liu","sequence":"additional","affiliation":[{"name":"China Academy of Space Technology, Beijing 100094, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2014,10,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1109\/62.387971","article-title":"Star Trackers for Attitude Determination","volume":"6","author":"Liebe","year":"1995","journal-title":"IEEE AES Syst. Mag."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1109\/TAES.2002.1008988","article-title":"Accuracy Performance of Star Trackers-A Tutorial","volume":"38","author":"Liebe","year":"2002","journal-title":"IEEE Comput. Trans. Aerosp. Electron. Syst."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"697","DOI":"10.1016\/S0094-5765(97)00051-9","article-title":"Operation and performance of a second generation, solid state, star tracker, the ASC","volume":"39","author":"Eisenman","year":"1996","journal-title":"Acta Astronaut."},{"key":"ref_4","unstructured":"Liebe, C.C., Dennison, E.W., Hancock, B., Stirbl, R.C., and Pain, B. (1998, January 21\u201328). Active Pixel Sensor (APS) based Star Tracker. Aspen, CO, USA."},{"key":"ref_5","first-page":"317","article-title":"Active China's First Civilian Three-line-array Stereo Mapping Satellite: ZY-3","volume":"41","author":"Li","year":"2012","journal-title":"Aerosp. Acta Geod. Cartogr. Sin."},{"key":"ref_6","unstructured":"Yadid-Pecht, O., Clark, C.C., Pain, B., Staller, C.O., and Fossum, E.R. (1996). Wide-dynamic-range APS star tracker. Electron. Syst. Electron. Imaging Sci. Technol."},{"key":"ref_7","unstructured":"Ball Aerospace & Technologies Corp. CT-602 Star Tracker. Available online: http:\/\/www.ballaerospace.com\/file\/media\/D0540_CT-602.pdf."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1109\/TAES.2008.4560198","article-title":"Geometric Voting Algorithm for Star Trackers","volume":"44","author":"Kolomenkin","year":"2008","journal-title":"IEEE Comput. Trans. Aerosp. Electron. Syst."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"813","DOI":"10.1109\/TAES.2002.1039401","article-title":"Brightness-Independent Start-up Routine for Star Trackers","volume":"38","author":"Accardo","year":"2002","journal-title":"IEEE Comput. Trans. Aerosp. Electron. Syst."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"93","DOI":"10.3390\/a2010093","article-title":"A Survey on Star Identification Algorithms","volume":"2","author":"Spratling","year":"2009","journal-title":"Algorithms"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"242","DOI":"10.2514\/3.21376","article-title":"Onboard star identification without a priori attitude information","volume":"18","author":"Ketchum","year":"1995","journal-title":"J. Guid. Control Dyn."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"728","DOI":"10.2514\/2.4589","article-title":"Neural-network-based autonomous star identification algorithm","volume":"23","author":"Hong","year":"2000","journal-title":"J. Guid. Control Dyn."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1002\/j.2161-4296.2004.tb00349.x","article-title":"The Pyramid Star Identification Technique","volume":"51","author":"Mortari","year":"2004","journal-title":"Navig. J. Inst. Navig."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"700","DOI":"10.1016\/j.cpc.2007.06.007","article-title":"Determining star-image location: A new sub-pixel interpolation technique to process image centroids","volume":"177","author":"Quine","year":"2007","journal-title":"Comput. Phys. Commun."},{"key":"ref_15","unstructured":"Perryman (1997). The Hipparcos and Tycho Catalogues, ESA Publications Division."},{"key":"ref_16","unstructured":"Katake, A.B. (2006). Modeling, Image Processing and Attitude Estimation of High Speed Star Sensors. [Ph.D. Thesis, Texas A&M University]."},{"key":"ref_17","first-page":"893","article-title":"A Fast On-Board Autonomous Attitude Determination System Based on a New Star-ID Technique for a Wide FOV Star Tracker","volume":"93","author":"Mortari","year":"1996","journal-title":"Adv. Astronaut. Sci."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1007\/BF03546375","article-title":"Search-Less Algorithm for Star Pattern Recognition","volume":"45","author":"Mortari","year":"1997","journal-title":"J. Astronaut. Sci."},{"key":"ref_19","unstructured":"James, R.W. (1978). Spacecraft Attitude Determination and Control, D. Reidel Publishing Co."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/14\/10\/18498\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:16:41Z","timestamp":1760217401000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/14\/10\/18498"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,10,8]]},"references-count":19,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2014,10]]}},"alternative-id":["s141018498"],"URL":"https:\/\/doi.org\/10.3390\/s141018498","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,10,8]]}}}