B. Bramanto, K. Prijatna, A. Pahlevi, Dina Anggreni Sarsito, D. Dahrin, E. Variandy, Raa Ina Sidrotul Munthaha
{"title":"Determination of gravity anomalies in Java, Indonesia, from airborne gravity survey","authors":"B. Bramanto, K. Prijatna, A. Pahlevi, Dina Anggreni Sarsito, D. Dahrin, E. Variandy, Raa Ina Sidrotul Munthaha","doi":"10.3319/tao.2021.06.04.01","DOIUrl":null,"url":null,"abstract":"The Geospatial Information Agency of Indonesia (BIG) recently carried out an airborne gravity survey mission to support a reliable Indonesian geoid model. The gravity observations covered all the main islands of Indonesia. This paper presents a state-of-the-art for gravity anomalies derivation using airborne gravity mission in Java, Indonesia. The common gravity corrections for deriving the scalar free-air gravity anomalies along the flight trajectory had been estimated using GNSS-derived positions. The corrected data were then filtered using the FIR method in which the cut-off frequency had been predetermined by considering aircraft altitude, geological setting, and instrument’s accuracy. To assess the airborne gravity results, we compared them with the upward continued terrestrial gravity measurements. In addition, we performed crossover analysis and adjusted the estimated biases to the airborne gravity measurements. The accuracy of adjusted airborne gravity anomaly was estimated to 3.37 mGal. In conclusion, the airborne gravity mission provided valuable data needed for further geodesy and geophysics applications","PeriodicalId":22259,"journal":{"name":"Terrestrial, Atmospheric and Oceanic Sciences","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Terrestrial, Atmospheric and Oceanic Sciences","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.3319/tao.2021.06.04.01","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The Geospatial Information Agency of Indonesia (BIG) recently carried out an airborne gravity survey mission to support a reliable Indonesian geoid model. The gravity observations covered all the main islands of Indonesia. This paper presents a state-of-the-art for gravity anomalies derivation using airborne gravity mission in Java, Indonesia. The common gravity corrections for deriving the scalar free-air gravity anomalies along the flight trajectory had been estimated using GNSS-derived positions. The corrected data were then filtered using the FIR method in which the cut-off frequency had been predetermined by considering aircraft altitude, geological setting, and instrument’s accuracy. To assess the airborne gravity results, we compared them with the upward continued terrestrial gravity measurements. In addition, we performed crossover analysis and adjusted the estimated biases to the airborne gravity measurements. The accuracy of adjusted airborne gravity anomaly was estimated to 3.37 mGal. In conclusion, the airborne gravity mission provided valuable data needed for further geodesy and geophysics applications
期刊介绍:
The major publication of the Chinese Geoscience Union (located in Taipei) since 1990, the journal of Terrestrial, Atmospheric and Oceanic Sciences (TAO) publishes bi-monthly scientific research articles, notes, correspondences and reviews in all disciplines of the Earth sciences. It is the amalgamation of the following journals:
Papers in Meteorological Research (published by the Meteorological Society of the ROC) since Vol. 12, No. 2
Bulletin of Geophysics (published by the Institute of Geophysics, National Central University) since No. 27
Acta Oceanographica Taiwanica (published by the Institute of Oceanography, National Taiwan University) since Vol. 42.