The main methods of GNSS processing are (1) the classical differential correction with a permanent base station, and (2) the Precise Point Positionning (PPP) method that does not require a base station and uses precises clock and ephemeris data.<\/p>\n\n\n\n
The tools used can be softwares or web-services. Among software we can distinguish between commercial softwares (e.g. Trimble Business Center TBC), open-source softwares (e.g. RTKLib), and scientific softwares (Bernese, Gamit\/Globk). We will introduce RTKLib and web-services. <\/p>\n\n\n\n
RTKLib is the main open-source library and software to process GNSS data. It can do conversion, post-processing, navigation, plotting, and so on. <\/p>\n\n\n\n
Note <\/em><\/strong>: Several versions of the software exist and they behave somewhat differently. I’ll try to describe them one by one but you’d better check carefully your results compared to another “official” reference in order to validate your process.<\/p>\n\n\n\n Versions of RTKLib :<\/p>\n\n\n\n Complementary tools for dealing with POS files from RTKLib and CSV files from ReachView<\/strong> :<\/p>\n\n\n\n This processing is done with static GNSS correction using a network of permanent stations.<\/p>\n\n\n\n RGP IGN http:\/\/rgp.ign.fr\/SERVICES\/calcul_online.php<\/a> , good for France, gives results in many coordinate systems including RGF93-Lambert93<\/p>\n\n\n\n GPS and Glonass ephemeris data, along with atmospheric data at https:\/\/kb.igs.org\/hc\/en-us\/articles\/115003935351<\/a><\/p>\n\n\n\n and also here (search more simple) https:\/\/webigs.ign.fr\/gdc\/fr\/product\/format#ephem<\/a><\/p>\n\n\n\n and also here (search simple too) https:\/\/cddis.nasa.gov\/Data_and_Derived_Products\/GNSS\/orbit_products.html<\/a><\/p>\n\n\n\n IGS Antenna calibration file (does not contain Emlid Reach RS2) : igs14.atx<\/a><\/p>\n\n\n\n List of IGS stations : here<\/a><\/p>\n\n\n\n GPS Calendar to get the GPS week : here<\/a> or at IGN site<\/a> <\/p>\n\n\n\n Julian calendar to get GPS day : here<\/a> or at IGN site<\/a><\/p>\n\n\n\n Offset between GPST (GPS Time) and UTC : here<\/a><\/p>\n\n\n\n The main methods of GNSS processing are (1) the classical differential correction with a permanent base station, and (2) the Precise Point Positionning (PPP) method that does not require a base station and uses precises clock and ephemeris data. The tools used can be softwares or web-services. Among software we can distinguish between commercial softwares … Continue reading “GNSS processing with open-source softwares”<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,1],"tags":[],"class_list":["post-463","post","type-post","status-publish","format-standard","hentry","category-gps","category-sigeo"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=\/wp\/v2\/posts\/463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=463"}],"version-history":[{"count":5,"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=\/wp\/v2\/posts\/463\/revisions"}],"predecessor-version":[{"id":557,"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=\/wp\/v2\/posts\/463\/revisions\/557"}],"wp:attachment":[{"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sigeo.cerege.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}PPP web-services<\/h2>\n\n\n\n
Static GNSS correction with web-service<\/h2>\n\n\n\n
GNSS complentary data and tools<\/h2>\n\n\n\n
More information<\/h2>\n\n\n\n