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.

GEOHALO 飞行任务 GEOHALO 是首次使用德国新型研究飞机 HALO 进行的科学任务，于 2012 年 6 月在意大利和地中海中部上空执行。该任务的成功得益于多所大学和研究机构的大力合作。研究机构，并由申请人（M.S.）作为任务PI领导。 GEOHALO 包含不同的机载大地测量学和地球物理学方法。重点关注机载重力测量、激光测高和全球导航卫星系统对飞行轨迹的观测，我们的目标是对意大利及其邻近海域的大范围重力场和进一步的地球科学参数进行一致、公正和均匀的测定。为此，我们的目标是结合使用不同的传感器，即利用两个不同的重力计、激光高度计以及各种 GNSS 天线和接收器在 GEOHALO 飞行任务期间获得的数据。使用喷气式飞机带来了机载大地测量学和地球物理学的全新应用。因此，在该项目中，我们将详细研究源自喷气式飞机特殊条件（更高的飞行速度、不同的飞行动力、更高的高度、加压舱）的所有方法方面。 GEOHALO 数据将用于应用球基函数和最小二乘搭配等不同技术来推断意大利的区域重力大地水准面。对不同数据组合以及不同空间尺度分辨率的研究将有助于回答GEOHALO数据在多大程度上可以帮助区域和全球重力场的改善。相反，HALO 的远程能力在 GEOHALO 任务期间充分利用了多个长度超过 1,000 公里的连续飞行剖面，能够连接现有的不同但仍然局部孤立的调查，以澄清地面数据中的不一致之处。调查区域的重力数据。（改进的）大地水准面和激光测高的结合将能够推断出平均海面地形，并将再次通过独立数据和/或模型进行评估。彻底的误差和灵敏度分析，特别是在重力场变量方面，将有助于确定进一步的大地测量-地球物理 HALO 任务的最佳飞行参数。这是非常重要的，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