GFZ Data Services

Released
Dataset

Airborne Gravimetry Data from GEOHALO project - (Data Set)

Cite as:

Lu, Biao; Barthelmes, Franz; Petrovic, Svetozar; Pflug, Hartmut; Förste, Christoph; Flechtner, Frank; Luo, Zhicai; He, Kaifei; Li, Min; Scheinert, Mirko (2017): Airborne Gravimetry Data from GEOHALO project - (Data Set). GFZ Data Services. http://doi.org/10.5880/GFZ.1.2.2017.001

Status

I   N       R   E   V   I   E   W : Lu, Biao; Barthelmes, Franz; Petrovic, Svetozar; Pflug, Hartmut; Förste, Christoph; Flechtner, Frank; Luo, Zhicai; He, Kaifei; Li, Min; Scheinert, Mirko (2017): Airborne Gravimetry Data from GEOHALO project - (Data Set). GFZ Data Services. http://doi.org/10.5880/GFZ.1.2.2017.001

Abstract

The dataset contains the results of airborne gravimetry realized by the GEOHALO flight mission over Italy in 2012. The intention was to show whether and how an efficient airborne gravity field determination is feasible in wide areas when using a fast jet aircraft like HALO at higher altitudes. Here, unlike in airborne gravimetry for exploration purposes, the aim is not primarily to reach the highest spatial resolution by flying as low and slowly as possible. A challenge for HALO would be to map areas (e.g., Antarctica) where only insufficient or no terrestrial gravity data are available to achieve a resolution which is better than that of satellite-only gravity field models. This is beneficial for the generation of global gravity field models which require a uniform, high spatial resolution for the gravity data over the entire Earth.

The raw gravimetry recordings were recorded by the GFZ air-marine gravimeter Chekan-AM. Kinematic vertical accelerations were calculated from Doppler observations which were derived by GNSS carrier phase measurements (1 Hz). To remove the high-frequency noise, a low-pass filter with a cut-off wavelength of 200 s (corresponding to a half-wavelength resolution of approximately 12 km) was applied to both the Chekan-AM measurements and GNSS kinematic accelerations. To investigate how future airborne gravity campaigns using jet aircraft could be optimized, a dedicated flight track was repeated two times which shows that the equipment worked well also at higher altitude and speed. For the accuracy analysis 17 crossover points could be used. This analysis yielded a RMS of the gravity differences of 1.4 mGal which, according to the law of error propagation, implies an accuracy of a single measurement to be 1 mGal. The dataset is provided in as ASCII text (Lu-et-al_2017-001_Tracks_GEOHALO.txt) and is described in the README.
For a detailed description of the set-up and analysis of the data, please see Biao et al. (2017, http://doi.org/10.1002/2017JB014425).

Contact

  • Lu, Biao (PhD student) ; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Barthelmes, Franz (Researcher) ; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Petrovic, Svetozar (Researcher) ; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Förste, Christoph (Researcher) ; GFZ German Research Centre for Geosciences, Potsdam, Germany;

Keywords

geodesy, geophysics, Airborne gravimetry, GEOHALO project, Chekan-AM, Gravity field modeling

GCMD Science Keywords

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      • publisher: GFZ Data Services
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        • subject: Gravity field modeling
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      • Entry_Title: Airborne Gravimetry Data from GEOHALO project - (Data Set)
      • Data_Set_Citation
        • Dataset_Creator: Lu, Biao; Barthelmes, Franz; Petrovic, Svetozar; Pflug, Hartmut; Förste, Christoph; Flechtner, Frank; Luo, Zhicai; He, Kaifei; Li, Min; Scheinert, Mirko
        • Dataset_Title: Airborne Gravimetry Data from GEOHALO project - (Data Set)
        • Dataset_Release_Date: 2017
        • Dataset_Release_Place: Potsdam, Germany
        • Dataset_Publisher: GFZ Data Services
        • Online_Resource: http://dx.doi.org/10.5880/GFZ.1.2.2017.001
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: GRAVITY/GRAVITATIONAL FIELD
        • Variable_Level_1: GRAVITY
      • ISO_Topic_Category: geoscientificInformation
      • Keyword: geodesy
      • Keyword: geophysics
      • Keyword: Airborne gravimetry
      • Keyword: GEOHALO project
      • Keyword: Chekan-AM
      • Keyword: Gravity field modeling
      • Spatial_Coverage
        • Southernmost_Latitude: 36
        • Northernmost_Latitude: 46
        • Westernmost_Longitude: 10
        • Easternmost_Longitude: 19
      • Data_Center
        • Data_Center_Name
          • Short_Name: Deutsches GeoForschungsZentrum GFZ
          • Long_Name: GFZ
        • Personnel
          • Role: DATA CENTER CONTACT
          • Last_Name: Deutsches GeoForschungsZentrum GFZ
      • Summary
        • Abstract: The dataset contains the results of airborne gravimetry realized by the GEOHALO flight mission over Italy in 2012. The intention was to show whether and how an efficient airborne gravity field determination is feasible in wide areas when using a fast jet aircraft like HALO at higher altitudes. Here, unlike in airborne gravimetry for exploration purposes, the aim is not primarily to reach the highest spatial resolution by flying as low and slowly as possible. A challenge for HALO would be to map areas (e.g., Antarctica) where only insufficient or no terrestrial gravity data are available to achieve a resolution which is better than that of satellite-only gravity field models. This is beneficial for the generation of global gravity field models which require a uniform, high spatial resolution for the gravity data over the entire Earth. The raw gravimetry recordings were recorded by the GFZ air-marine gravimeter Chekan-AM. Kinematic vertical accelerations were calculated from Doppler observations which were derived by GNSS carrier phase measurements (1 Hz). To remove the high-frequency noise, a low-pass filter with a cut-off wavelength of 200 s (corresponding to a half-wavelength resolution of approximately 12 km) was applied to both the Chekan-AM measurements and GNSS kinematic accelerations. To investigate how future airborne gravity campaigns using jet aircraft could be optimized, a dedicated flight track was repeated two times which shows that the equipment worked well also at higher altitude and speed. For the accuracy analysis 17 crossover points could be used. This analysis yielded a RMS of the gravity differences of 1.4 mGal which, according to the law of error propagation, implies an accuracy of a single measurement to be 1 mGal. The dataset is provided in as ASCII text (Lu-et-al_2017-001_Tracks_GEOHALO.txt) and is described in the README. For a detailed description of the set-up and analysis of the data, please see Biao et al. (2017, http://doi.org/10.1002/2017JB014425).
      • Metadata_Name: DIF
      • Metadata_Version: 9.8.2
  • escidoc:  /  download xml
    • resource
      • title (xml:lang=en): Airborne Gravimetry Data from GEOHALO project - (Data Set)
      • creator
        • creatorName: Lu, Biao
        • nameIdentifier (nameIdentifierScheme=ORCID): orcid.org/0000-0003-0859-650X
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
        • creatorName: Barthelmes, Franz
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0001-5253-2859 Print view
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
        • creatorName: Petrovic, Svetozar
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-0744-577X
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany (retired)
      • creator
        • creatorName: Pflug, Hartmut
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
        • creatorName: Förste, Christoph
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-4476-9183
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
        • creatorName: Flechtner, Frank
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-3093-5558
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
        • creatorName: Luo, Zhicai
        • affiliation: Institute of Geophysics, Huazhong University of Science and Technology, Wuhan, PR China
      • creator
        • creatorName: He, Kaifei
        • affiliation: School of Geosciences, China University of Petroleum, Qingdao, PR China
      • creator
        • creatorName: Li, Min
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
        • creatorName: Scheinert, Mirko
        • affiliation: Technische Universität Dresden, Germany

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