TY - JOUR

T1 - Sub-cm-Konsistenz von nivellierten Normalhöhen, GNSS-Positionen und Quasigeoid im Testgebiet Harz

AU - Krawinkel, Thomas

AU - Hücker, Dennis

AU - Schikschneit, Christian

AU - Beermann, Kerstin

AU - Flury, Jakob

AU - Vey, Sibylle

AU - Antoni, Markus

AU - Feldmann-Westendorff, Uwe

N1 - Das Autorenteam dankt Christian Hirt und Christian Voigt für die Zurverfügungstellung der astrogeodätischen Quasigeoidprofile, sowie Heiner Denker für das GCG05. Das LGLN stellte Daten der Nivellementlinien bereit und unterstützte die Autoren bei der Analyse. Peter Lembrecht vom LGLN wertete darüber hinaus die aktuellsten Nivellementdaten aus und machte diese für uns verfügbar. Die GNSS-Beobachtungsdaten der SAPOS®-Referenzstationen wurden vom LGLN und vom LVermGeo Sachsen-Anhalt kostenlos bereitgestellt. Des Weiteren danken wir der zfv-Schriftleitung und einem anonymen Reviewer für die vielen hilfreichen Anmerkungen, die zur Verbesserung des Manuskripts beigetragen haben.

PY - 2013

Y1 - 2013

N2 - Normal heights can be determined without spirit leveling by combining GNSS heights with a quasigeoid model. The resulting accuracy depends on the quality of the quasigeoid model and on the realization of the GNSS heights. Investigations on this topic are timely because of the ongoing modernization of the height system in Germany. In the Harz mountain range, a sub-cm accuracy validation data set has been established in two GNSS campaigns at stations of the first order leveling network. We used height residuals from GNSS heights, GCG05 quasigeoid heights and DHHN92 normal heights to quantify measurement and modeling errors. The residuals have a very low RMS of 4,9 mm. By including two astrogeodetic quasigeoid profiles we could mutually check different types of residuals and show that the largest contribution to the height residuals (typically about 5 mm) is due to station-dependent GNSS errors while the quasigeoid errors are smaller. We conclude that sub-cm consistency of GNSS positioning, normal heights and quasigeoid model can be achieved, even under rather difficult conditions of a mountain range. This seems internationally relevant as for many countries height residuals are reported that are considerably larger which may be due to the inferior quality of fundamental networks.

AB - Normal heights can be determined without spirit leveling by combining GNSS heights with a quasigeoid model. The resulting accuracy depends on the quality of the quasigeoid model and on the realization of the GNSS heights. Investigations on this topic are timely because of the ongoing modernization of the height system in Germany. In the Harz mountain range, a sub-cm accuracy validation data set has been established in two GNSS campaigns at stations of the first order leveling network. We used height residuals from GNSS heights, GCG05 quasigeoid heights and DHHN92 normal heights to quantify measurement and modeling errors. The residuals have a very low RMS of 4,9 mm. By including two astrogeodetic quasigeoid profiles we could mutually check different types of residuals and show that the largest contribution to the height residuals (typically about 5 mm) is due to station-dependent GNSS errors while the quasigeoid errors are smaller. We conclude that sub-cm consistency of GNSS positioning, normal heights and quasigeoid model can be achieved, even under rather difficult conditions of a mountain range. This seems internationally relevant as for many countries height residuals are reported that are considerably larger which may be due to the inferior quality of fundamental networks.

KW - Geoid

KW - Höhen

KW - Grundlagennetze

KW - GNSS

KW - Zenitkamera

UR - http://www.scopus.com/inward/record.url?scp=84879368238&partnerID=8YFLogxK

M3 - Artikel

AN - SCOPUS:84879368238

VL - 138

SP - 201

EP - 209

JO - zfv – Zeitschrift für Geodäsie, Geoinformation und Landmanagement

JF - zfv – Zeitschrift für Geodäsie, Geoinformation und Landmanagement

SN - 1618-8950

IS - 3

ER -