Aerospace Research in Bulgaria最新文献

Drought Monitoring Using Remote Sensing Data 基于遥感数据的干旱监测

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e06

Antoaneta Frantzova

引用次数: 0

Monitoring Coastal Landslides along the Northeast Black Sea of Bulgaria Using SAR data 利用SAR数据监测保加利亚黑海东北部沿海滑坡

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e07

H. Nikolov, M. Atanasova

{"title":"Monitoring Coastal Landslides along the Northeast Black Sea of Bulgaria Using SAR data","authors":"H. Nikolov, M. Atanasova","doi":"10.3897/arb.v35.e07","DOIUrl":"https://doi.org/10.3897/arb.v35.e07","url":null,"abstract":"The geological conditions along the Northeast Black sea coast of Bulgaria are favorable for landslides emergence and development. Those processes have been rigorously documented in the last fifty years by Earth science researchers. Their efforts contributed in a broader context to the landscape conservation and to mitigate the risks for the population caused by the mentioned surface disruptions. In this paper the obtained results record the temporal behavior of several landslides located in stated region during the last five years. The main data source to monitor the mentioned landslides are data from synthetic aperture radar (SAR) instrument processed by the differential interferometric SAR (DInSAR) method. The produced results were validated by means of global navigation satellite system (GNSS) measurements carried out at purposely created geodetic networks, satellite images with high spatial resolution and digital images obtained by unmanned aerial systems (UASs). The results presented in this paper unambiguously confirm the usability of the produced information for the local authorities and other stakeholders thus contributing to the improvement of landslide risk management practices and to the better planning of the territory where the researched landslides are located.","PeriodicalId":40457,"journal":{"name":"Aerospace Research in Bulgaria","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70394521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Choice of the Optimum Design of Lateral PMD Using the CFD Method 基于CFD方法的横向PMD优化设计选择

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e13

O. Minai, I. Kuzmich

{"title":"Choice of the Optimum Design of Lateral PMD Using the CFD Method","authors":"O. Minai, I. Kuzmich","doi":"10.3897/arb.v35.e13","DOIUrl":"https://doi.org/10.3897/arb.v35.e13","url":null,"abstract":"Residues of propellant components in the power system of the propulsion system, at the end of the operation of the launch vehicle, to a large extent affect its energy characteristics. Propellant management devices (PMD), which are equipped with tanks of modern launch vehicles, provide a continuous supply of liquid propellant components from the tank to the propulsion system without disturbing the continuity of the flow and minimize of the residues of the propellant components. In the tank of a launch vehicle, the presence of a tunnel pipeline complicates, and in certain cases excludes the possibility of taking from the pole of the tank. In this case, the use of a lateral PMD allows solving the problem of propellant intake. The authors carried out a search and justification for the optimal design of the PMD using the example of the fuel tank of the first stage of the \"Cyclone-4\" launch vehicle, which is equipped with an PMD in the form of a profiled plate. The designs of the siphon and annular PMD are considered. An analytical calculation using empirical dependences, a physical experiment and numerical simulation of their main parameters was carried out. The result of the experimental and computational-analytical work was the determination of the most optimal variant of the PMD, which, according to several parameters, turned out to be a siphon PMD. The introduction of a more advanced siphon PMD into the design of the fuel tank of the \"Cyclone-4\" launch vehicle will improve the energy characteristics of the launch vehicle by increasing the weight of the output payload by 5.4 kg.","PeriodicalId":40457,"journal":{"name":"Aerospace Research in Bulgaria","volume":"13 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70394469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aviation Safety and Impact on the Reliability of Data from Different Sources of Physical Sizes 航空安全及其对不同物理尺寸来源数据可靠性的影响

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e14

Nikolay Zagorski

引用次数: 0

Space Distribution of NO2 Pollution over Bulgaria 保加利亚NO2污染的空间分布

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e03

M. Dimitrova, P. Trenchev

引用次数: 3

Space Experiment "Obstanovka (1-Step)", Block DP - PM on the Russian Segment of the International Space Station 空间实验“奥布斯塔诺夫卡(1-步骤)”，在国际空间站俄罗斯部分的DP - PM座

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e15

Anna Bouzekova-Penkova, S. Klimov, V. Grushin, O. Lapshinova, D. Novikov, D. Teodosiev

引用次数: 0

Compound Preselector for Multistatic Passive Radar Employed in Remote Sensing Applications 遥感多源无源雷达复合预选择器

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e09

S. Zabunov, G. Mardirossian

引用次数: 0

Use of Low-Power Unmanned Aerial Vehicles for Control of an Urbanized Area 低功率无人机在城市区域控制中的应用

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e10

I. Ivanov

引用次数: 0

Increase of Carbon Dioxide and Methane Emissions over Bulgaria on the Base of GOSAT Satellite Data 基于GOSAT卫星数据的保加利亚上空二氧化碳和甲烷排放量的增加

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e04

Plamen Trenchev, M. Dimitrova, Deyan Gochev

引用次数: 0

Use of Open, Spatial and Satellite Data for the Purpose of Researching Landfills for Municipal 利用开放、空间和卫星数据研究城市垃圾填埋场

IF 0.3

Aerospace Research in Bulgaria Pub Date : 2023-01-01 DOI: 10.3897/arb.v35.e05

A. Dancheva, Temenuzhka Spasova

{"title":"Use of Open, Spatial and Satellite Data for the Purpose of Researching Landfills for Municipal","authors":"A. Dancheva, Temenuzhka Spasova","doi":"10.3897/arb.v35.e05","DOIUrl":"https://doi.org/10.3897/arb.v35.e05","url":null,"abstract":"The present work traces the development of an illegal landfill near the town of Svoge in Bulgaria. After 2016, a waste management plan is prepared on the territory of the municipality and a decision is made to dispose of it by depositing it in a regional landfill for municipal waste in the town of Kostinbrod. The aim of the study is to trace the development of biochemical processes that took place on the territory of the former landfill and whether their impact continues to this day. Data from the Open Data Portal (https://data.egov.bg/), the National Spatial Data Portal INSPIRE (https://inspire.egov.bg/bg), satellite data and GIS, several spectral profiles and indices such as Normalized difference vegetation index (NDVI), Tasseled Cap Transformation (TCT) were used. Composite images from the multispectral instrument (MSI) of the Sentinel 2 platform and radar (SAR) from the Sentinel 1 platform of the Copernicus program of the European Space Agency were used. The surface temperature of the landfill was calculated using the heat channels from the Landsat 5-7 (ETM) and Landsat 8 and Landsat 9 (OLI / TIRS) sensors. A combination of radar and optical data was made. Data from different seasons and years were used in order to monitor the dynamics of thermal pollution in the study area. Quantitative and qualitative assessment of the territory on which the landfill is located has been made. Last but not least, the role of high-value open data in environmental monitoring has been demonstrated, which will reduce the administrative burden of making responsible decisions for each smaller municipality and will be successfully implemented in future methodologies for improving Digital twins through technical work in Destination Earth (DestinE) and information about any point, area or globally significant territories.","PeriodicalId":40457,"journal":{"name":"Aerospace Research in Bulgaria","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70394397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1