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

• 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

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是利用德国新型研究飞机HALO进行的第一个科学任务，于2012年6月在意大利和地中海中部进行了大地测量-地球物理飞行任务。这次任务的成功是由于几所大学和研究机构的大量合作努力，并由申请人（硕士）作为任务PI领导。GEOHALO包括不同的航空测量和地球物理方法。通过对飞行轨迹的机载重力测量、激光测高和GNSS观测，我们的目标是对意大利及其邻近海域的大范围地区的重力场和进一步的地球科学参数进行一致、公正和均匀的确定。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仪、一个激光高度计和各种GNSS天线和接收器在GEOHALO飞行任务中获得的数据。使用喷气式飞机导致了一种全新的机载大地测量学和地球物理应用。因此，在该项目中，我们将详细调查喷气飞机的特殊条件（更高的飞行速度，不同的飞行动力学，更高的高度，加压客舱）所产生的所有方法方面。GEOHALO数据将通过球面基函数和最小二乘配置等不同的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数据在多大程度上有助于区域和全球重力场的改善。相反，在GEOHALO任务期间，HALO的远程能力充分利用了若干长度超过1 000公里的连续飞行剖面，能够将现有的不同但仍然在局部孤立的调查联系起来，以澄清调查地区地面重力数据的不一致之处。（改进的）大地水准面和激光测高的结合将可以推断平均海面地形，这些地形将再次由独立的数据和/或模型进行评估。彻底的误差和灵敏度分析，特别是对重力场变量的分析，将有助于为进一步的大地-地球物理HALO任务确定最佳飞行参数。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

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
• 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

• DOI: 10.1093/gji/ggy456
• 发表时间: 2018-11
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: T. Schaller;M. Scheinert;Franz Barthelmes-;C. Förste

Airborne Gravimetry of GEOHALO Mission: Data Processing and Gravity Field Modeling

GEOHALO机载重力测量任务：数据处理和重力场建模

• DOI: 10.1002/2017jb014425
• 发表时间: 2017-12-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
• 影响因子: 3.9
• 作者: Lu, Biao;Barthelmes, Franz;Li, Min
• 通讯作者: Li, Min