Investigation of the regional GRAVity field, geoid and mean sea-surface topography in ITalY and at the adjacent seas using airborne gravimetry and laser altimetry data acquired during the GEOHALO mission

使用 GEOHALO 任务期间获得的机载重力测量和激光测高数据对意大利和邻近海域的区域重力场、大地水准面和平均海面地形进行调查

基本信息

批准号：
263535475
负责人：
Dr. Christoph Förste
金额：
--
依托单位：
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/263535475?language=en
关键词：
Investigation regional GRAVity field geoid

项目摘要

Being the the first scientific mission utilizing the new German research aircraft HALO the geodetic-geophysical flight mission GEOHALO was carried out over Italy and the central Mediterranean Sea in June 2012. The success of this mission was due to a large cooperation effort of several universities and research institutions and was led by the applicant (M.S.) as the mission PI. GEOHALO comprises different airborne methods of geodesy and geophysics. Focussing on airborne gravimetry, laser altimetry and GNSS observations of the flight trajectory we aim to carry out a consistent, unbiased and homogeneous determination of the gravity field and of further geoscientific parameters over the large-scale area of Italy and its adjacent seas. To do so, we aim to make use of a combination of different sensors, namely to utilize data gained by two different gravimeters, a laser altimeter and various GNSS antennas and receivers during the GEOHALO flight mission. Employing a jet aircraft results in a completely novel application of airborne geodesy and geophysics. Therefore, within the project we will investigate in detail all methodic aspects originating from the special conditions of the jet aircraft (higher flight velocity, different flight dynamics, higher altitude, pressurized cabin). The GEOHALO data will be used to infer a regional gravimetric geoid over Italy applying different techniques like spherical base functions and least-squares collocation. The investigation of different data combinations as well as of the resolution at different spatial scales will help to answer to what extent the GEOHALO data can assist an improvement of the gravity field both regionally and globally. On the contrary, the long-range capability of HALO, fully employed with several continuous flight profiles of more than 1,000 km length during the GEOHALO mission, enables to connect existing different but still locally isolated surveys in order to clarify inconsistencies in the ground-based gravity data in the area of investigation. A combination of the (improved) geoid and laser altimetry will allow to infer the mean sea-surface topography which will again be evaluated by independent data and/or models. A thorough error and sensitivity analysis, especially in terms of the gravity field variables, shall help to identify optimal flight parameters for further geodetic-geophysical HALO missions. This is of eminent importance since an optimal balance has to be reached between scientific requirements and economic considerations.

作为使用新的德国研究飞机光环的第一个科学任务，地球物理飞行飞行任务Geohalo于2012年6月在意大利和地中海中部进行。该任务的成功归功于多家大学和研究机构的大型合作，并由申请人（M.S.）领导。 Geohalo包括不同的地球和地球物理学方法。我们旨在对飞行轨迹进行空中载量，激光高度测定和GNSS观察，以对重力场以及在意大利及其相邻海域的大规模区域进行一致，公正和均匀的测定。为此，我们旨在利用不同传感器的组合，即利用由两个不同的重力计获得的数据，一个激光高度计以及Geohalo飞行任务期间的各种GNSS天线和接收器。采用喷气飞机会导致空气中的地理生物和地球物理学的全新应用。因此，在该项目中，我们将详细研究所有源自喷气飞机特殊条件的方法方面（较高的飞行速度，不同的飞行动力学，较高的高度，加压机舱）。 GeoHalo数据将用于推断出在意大利上使用不同技术（例如球形基础函数和最小二乘搭配）的区域重量测量。对不同数据组合以及不同空间尺度下分辨率的研究将有助于回答地质数据在多大程度上有助于改善区域和全球重力场。相反，在Geohalo任务期间，充分利用了几种超过1,000公里长度的光环的远程能力，使得可以连接现有的不同但仍在局部隔离的调查，以阐明研究领域的地面重力数据中的不一致。（改进的）Geoid和激光高度测定法的组合将允许推断平均海面形貌，该地形将再次通过独立的数据和/或模型进行评估。彻底的错误和灵敏度分析，尤其是在重力场变量方面，应有助于确定进一步的大地怪异晕圈任务的最佳飞行参数。这至关重要，因为必须在科学要求和经济考虑之间达到最佳平衡。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Testing Airborne Gravity Data in the Large-Scale Area of Italy and Adjacent Seas

DOI：
10.1007/1345_2015_45
发表时间：
2015
期刊：
影响因子：
0
作者：
R. Barzaghi;A. Albertella;D. Carrion;F. Barthelmes;S. Petrovic;M. Scheinert
通讯作者：
R. Barzaghi;A. Albertella;D. Carrion;F. Barthelmes;S. Petrovic;M. Scheinert

Inversion of GEOHALO aerogravimetry to infer ocean bottom topography: application to the Tyrrhenian, Ionian and Adriatic seas