International GNSS Symposium 2008 November, ?· International GNSS Symposium 2008 November, 11.–14.…

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- Part of a Geosensor NetworkInternational GNSS Symposium 2008November, 11.14. 2008Dr. Cord-Hinrich JahnNovember, 11. 14. 2008AgendaSAPOSSpatial references and networkExamplesExamplesWhat is SAPOS ?What is SAPOS ?Satellite Positioning Service of theSatellite Positioning Service of the German National SurveyConcept of SAPOS Full 24-hour DGNSS and PDGNSS-service Use of GPS, GLONASS and Galileo Real time and post processing service Real time and post-processing service Replacement of the necessary second RTK-GNSS receiver in the classical use of RTK Use of a high accurate international reference frame (ETRS89) Broadcasting of data via various communication media Broadcasting of data via various communication media Real time processing of the RTK-network and actual data exchangeexchange Elimination of distance dependent errors Initialization times of 15-45 seconds over distances of th 20 kmore than 20 kmConcept of SAPOS PDGNSSExample Lower SaxonyExample Lower Saxony Reference Stations in Lower Saxonyy Real time data transmission from each reference station to the central control Processing of the whole network in a permanent real time adjustment Estimation of distance dependent errors in a regional modelerrors in a regional model Transmission of observations and model parameters to the usermodel parameters to the user Estimation of the users coordinates relative to the next reference stationMilestones of SAPOS 1994 Establishment of an expert group on reference stations1994 Establishment of an expert group on reference stations1996 Decision, to build up an Satellite Positioning Service of the German surveying authorities1998 1 t SAPOS i H b1998 1st SAPOS symposium, Hamburg1999 Foundation of Technical Committee SAPOS2002 Introduction of nationwide compulsory SAPOS-HEPS2002 Introduction of nationwide compulsory SAPOS-HEPSstandards, e.g. network RTK, absolute antenna calibration2003 250 ti l SAPOS f t ti2003 250 operational SAPOS reference stations2003 Establishment of Central Bureau SAPOS2003 1st PPP contract with Ruhrgas AG (ascos)2003 1st PPP contract with Ruhrgas AG (ascos)2005 Installation of ntrip caster (internet interface)2006 Framework paper on the future of SAPOS2007 270 operational SAPOS reference stationsSAPOS -Reference Stationsin Germany Mai 2007in Germany, Mai 2007- 270 stations- 270 stations- mean station distanciesbetween 25 - 60 km- dual frequency receivers- in the responsibility of the16 St t S Offi16 State Survey Offices SAPOS - Reference StationsAntenna set upSAPOS - Reference StationsBorkumAufbauDifferent varations of reference stations Yellowstone, 1999Swisstopo, 2006reference stationsSwisstopo, 2006SAPOS-ServicesR l tiR l ti P t P iP t P iReal timeReal time Post ProcessingPost ProcessingEPS HEPS GPPSEPS1-3 mFM radioHEPS1-2/ cmmobile phoneGPPS< 1 cmftp e mail data carrierFM radioRTCM 2.0, 2.3mobile phone, InternetRTCM 2.3, 3 0/3 1ftp, e-mail, data carrierRINEX 2.1RS data filesVRS d t t3.0/3.1Network RTK (FKP,VRS,MAC)VRS data setsEPS: Real Time Positioning ServiceHEPS: High Precision Real Time Positioning ServiceGPPS: Geodetic Precision Positioning ServiceSAPOS -FeesService Data Rate Fee1EPS 1 s 150,00 / year2HEPS 1 s 0 10 / minHEPS 1 s 0,10 / minGPPS > 1 s 0,20 / min< 1 s 0,80 / min1) Fees principally depending on used amount of data2) Single fee with purchase of equipment2) Single fee with purchase of equipmentApplication of SAPOSState survey:P i i fAdditional applications: Hydrography Provision of reference frame Geodetic control Hydrography Engineering surveys Aerial photogrammetry Geodetic control measurements Height transferAerial photogrammetry Airborne / terrestrial laser scanning Height transferCadastral surveyg Geodynamic research Weather service Time transfer All kinds of navigationConveyance of Cruise Liners from the shipyard Papenburg to the Northsee using SAPOS-EPSPapenburg to the Northsee using SAPOS EPSMonitoring within the RTK networkPostprocessing of daily and weeklycoordinates of reference stationscoordinates of reference stationsReal time processing within theReal time processing within theRTK network processingContinuous estimation of rover-coordinatesf t tifor a representative userQuality of Network-RTKSAPOSSpatial references and networkExamplesExamplesBasic tasks for Spatial Reference Based on the laws of 16 German Federal States State survey authorities are responsible for y pproviding a uniform, , homogenous spatial reference system, p y 2D/3D positions, physical heights, and gravity, employing monumented geodetic control employing monumented geodetic control networks (GCN)Standardized Spatial Reference in Germany (AdV 2004)Germany (AdV 2004)Bundeseinheitliches,homogenesFestpunktfeldFederal standardised and uniform network of control stationsFestpunktfeldGeodetic land Height geodetic Gravity geodetic Reference stationnetwork points(GGP)control points(HFP)control stations(SFP)points(RS)3D 1D 1D 3DDSGN 94DHSN 96 SAPOSDHHN 92(DHHN 2011)(in discussion: DHHN 2011, ...)European Vertical Reference System (UELN)System (UELN)German Primary Levelling Net(DHHN 1992)Network graphNetwork graphHistory of observation accuracyAccuracy of German Levelling NetworksAccuracy of German Levelling Networks2,5SNN 561 52ustment 0.5 ] NKN II GrundnetzNKN II KsteNiv-Netz 60DHHN 85 = NKN IIIDHHN 92NKN I GrundnetzNKN I KsteRHN = DHHN 12SNN 56SNN 7611,5m net addj[mm/km0UrnivellementDHHN 2006-2011 (Genauigk. unb. )00,5s 0 from01860 1880 1900 1920 1940 1960 1980 2000 2020YearGerman Primary Levelling Net 2006-2011 006 0 Levelling lines (~ 20000 km) Levelling lines ( 20000 km) 250 GNSS points 100 Absolute gravity pointsg y p 250 SAPOS reference stations IGS, EPN, GREF with sh 5 mm in mind ITRF 2005 / IGS05minimum obligation linesoptional linesGNSS pointpAbsolut gravity pointGNSS + absolut gravity pointIGS/EPN/GREF stationSAPOS reference stationGerman Primary Levelling Net 2006-2011 All sorts of activities:006 0All sorts of activities: Levelling GNSS field measurements GNSS field measurements Absolut gravity measurementsSAPOSS ti l f d t kSpatial references and networkExamplesProject IKSdevelopment of an integrated approach to altitudedevelopment of an integrated approach to altitude determination and monitoring in coastal regions Measurements made by different height sensors (levelling, gravity, GPS and water level) will be gathered and combined into an integrated kinematicand water-level) will be gathered and combined into an integrated kinematic approach under consideration of the accuracies of the different height sensors. Research project by the German Coastal Engineering Research Council Runtime: 10 2005 09 2008 (3 years) Runtime: 10.2005 09.2008 (3 years)(IKS A) (IKS B) (IKS C) (IKS D)coordination water-level algorithm software data of LGNcoordination water level, algorithm, software, data of LGN,GNSS, gravity alignment combination levelling, DatabaseMonitoring of SAPOS reference stationsstationsh i ht theight component15 [mm]015 [mm]-15 [mm]1998 2006 R f TU D d1998 2006 Reference: TU DresdenEarth quake Rotenburg (Wmme) 20042004WDR0 D E 1 (2) 0 D E 1 (2)October 2004 - Magnitude 4,5Salt domes and cavernsmap scale: 20 kmmap scale: 20 kmGround level subsidence and displacement Cavern Wilhelmshavendisplacement Cavern Wilhelmshaven 1.200 - 1.400 m deep about 12 Mio m3 oil about 12 Mio. m oil resources horizontal displacement (10 cm) vertical subsidence (20 cm) as a consequence of fill and d l t d !deplete procedures!Cavern Wilhelmshaven(Epoche 1: 1980)(Epoche 1: 1980)(Epoche 2: 1999, 2004, 2005)map scale: 3 kmdifferences: 5 cmSalt mine Wunstorf Kolenfeld(Epoche 1: 1982) (Epoche 2: 2002)differences: 10 cmLong time series of monthly mean sea leveltime [a]mean sea level water-level observations time [a](tide gauge) are relative! seemingly subsidence g yfrom postglacial uplift!R f D Li b h BKGReference: Dr. Liebsch, BKGSummary and Outlook SAPOS is actually a part of a geosensor network The service provides real time and post processing The service provides real time and post processing data for all accuracies and for a lot of applications SAPOS is a part of the new federal standardised puniform network The combination of all parts of the new federal network i th ti l d l b l d tin an common mathematical model can be lead to an integrated geosensor network

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