{"id":3056,"date":"2011-01-18T18:27:29","date_gmt":"2011-01-18T16:27:29","guid":{"rendered":"http:\/\/vaxxi.net\/log\/?p=3056"},"modified":"2011-01-18T07:28:00","modified_gmt":"2011-01-18T05:28:00","slug":"gps-asistat-a-gps-pe-android","status":"publish","type":"post","link":"https:\/\/vaxxi.net\/log\/gps-asistat-a-gps-pe-android\/","title":{"rendered":"gps asistat (a-gps) pe android"},"content":{"rendered":"

\"\"De c\u00e2nd am ajuns aici, tot nu reu\u0219eam s\u0103 ob\u021bin un gps-fix pe nic\u0103ieri. \u0218tiam c\u0103-n mod normal GPS-ul e mai lent dac\u0103 n-are re\u021bea de date conectat\u0103, dar chiar a\u0219a de r\u0103u s\u0103 fie ? \u0218i m-am apucat de studiat cum func\u021bioneaz\u0103 A-GPS (assisted GPS) pe Android. \u00cen \/system\/etc\/gps.conf exist\u0103 datele de configurare pentru A-GPS, care arat\u0103 cam a\u0219a:<\/p>\n

NTP_SERVER=europe.pool.ntp.org
\nXTRA_SERVER_1=http:\/\/xtra1.gpsonextra.net\/xtra.bin
\nXTRA_SERVER_2=http:\/\/xtra2.gpsonextra.net\/xtra.bin
\nXTRA_SERVER_3=http:\/\/xtra3.gpsonextra.net\/xtra.bin
\nSUPL_HOST=supl.google.com
\nSUPL_PORT=7276<\/code><\/p>\n

NTP_SERVER este serverul NTP, pentru sincronizarea ceasului. C\u00e2mpurile XTRA indic\u0103 loca\u021biile de desc\u0103rcare a efemeridelor<\/a>: Global Positioning System (GPS) navigation satellites transmit electronic ephemeris data consisting of health and exact location data that GPS receivers then use (together with the signal’s elapsed travel time to the receiver) to calculate their own location on Earth using trilateration.<\/em> C\u00e2mpurile SUPL_HOST \u0219i SUPL_PORT definesc serverul de A-GPS, \u00een acest caz tocmai serverul Google. <\/p>\n

A\u0219adar, era configurat dar neutilizat; implicit, se pare c\u0103 fi\u0219ierul de efemeride e desc\u0103rcat doar c\u00e2nd GPS-ul e pornit simultan cu conexiunea de date, ceea ce la mine nu se \u00eent\u00e2mpla (deoarece pe-aici folosesc doar wireless-uri, care-s indoor). Solu\u021bia a fost s\u0103 descarc GPS Status & Toolbox<\/a>, care \u0219tie s\u0103 declan\u0219eze desc\u0103rcarea efemeridelor chiar \u0219i doar \u00een prezen\u021ba unei conexiuni de date. Am desc\u0103rcat fi\u0219ierul, am ie\u0219it afar\u0103, gps-fix \u00een 9 secunde.<\/p>\n","protected":false},"excerpt":{"rendered":"

De c\u00e2nd am ajuns aici, tot nu reu\u0219eam s\u0103 ob\u021bin un gps-fix pe nic\u0103ieri. \u0218tiam c\u0103-n mod normal GPS-ul e mai lent dac\u0103 n-are re\u021bea de date conectat\u0103, dar chiar a\u0219a de r\u0103u s\u0103 fie ? \u0218i m-am apucat de studiat cum func\u021bioneaz\u0103 A-GPS (assisted GPS) pe Android. \u00cen \/system\/etc\/gps.conf exist\u0103 datele de configurare pentru…(Continue Reading)<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[29,181,61],"class_list":["post-3056","post","type-post","status-publish","format-standard","hentry","category-gadgets","tag-android","tag-gadgets","tag-gps"],"yoast_head":"\ngps asistat (a-gps) pe android<\/title>\n<meta name=\"description\" content=\"De c\u00e2nd am ajuns aici, tot nu reu\u0219eam s\u0103 ob\u021bin un gps-fix pe nic\u0103ieri. \u0218tiam c\u0103-n mod normal GPS-ul e mai lent dac\u0103 n-are re\u021bea de date conectat\u0103, dar\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vaxxi.net\/log\/gps-asistat-a-gps-pe-android\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"VAXXi\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" 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