scholarly journals Earth Observation – Space Technology

10.5772/27665 ◽  
2012 ◽  
Author(s):  
Rustam B. ◽  
Saida E. ◽  
Maral H. ◽  
Sabina N.
Keyword(s):  
Earth Observation ◽  
Space Technology ◽  
Observation Space

New fixed point of on-orbit calibration scale based on the In-Bi eutectic alloy for application in novel high-stable space-borne standard sources

2021 ◽  
pp. 32-37
Author(s):  
Andrei A. Burdakin ◽  
Valerii R. Gavrilov ◽  
Ekaterina A. Us ◽  
Vitalii S. Bormashov
Keyword(s):  
Phase Transition ◽  
Fixed Point ◽  
Fixed Points ◽  
Eutectic Alloy ◽  
Earth Observation ◽  
Melt Temperature ◽  
Phase Transition Temperatures ◽  
Set Up ◽  
The Stability ◽  
Observation Space

The problem of ensuring stability of Earth observation space-borne instruments undertaking long-term temperature measurements within thermal IR spectral range is described. For in-flight reliable control of the space-borne IR instruments characteristics the stability of onboard reference sources should be improved. The function of these high-stable sources will be executed by novel onboard blackbodies, incorporating the melt↔freeze phase transition phenomenon, currently being developed. As a part of these works the task of realizing an on-orbit calibration scale within the dynamic temperature range of Earth observation systems 210−350 K based on fixed-point phase transition temperatures of a number of potentially suitable substances is advanced. The corresponding series of the onboard reference blackbodies will be set up on the basis of the on-orbit calibration scale fixed points. It is shown that the achievement of the target lies in carrying out a number of in-flight experiments with the selected fixed points and the prospective onboard fixed-point blackbodies prototypes. The new In-Bi eutectic alloy melt temperature fixed point (~345 K) is proposed as the significant fixed points of the future on-orbit calibration scale. The results of the new fixed point preliminary laboratory studies have been analyzed. The results allowed to start preparation of the in-flight experiments investigating the In-Bi alloy for the purpose of its application in the novel onboard reference sources.

scholarly journals Constructing a High-Accuracy Geometric Model for Moon-Based Earth Observation

2019 ◽  
Vol 11 (22) ◽  
pp. 2611
Author(s):  
Yixing Ding ◽  
Huadong Guo ◽  
Guang Liu ◽  
Chunming Han ◽  
Haolv Shang ◽  
...  
Keyword(s):  
Geometric Model ◽  
The United States ◽  
Earth Observation ◽  
Integration Time ◽  
Qualitative Comparison ◽  
Comparison Results ◽  
Time Correction ◽  
Lunar Missions ◽  
Observation Space ◽  
Better Than

The Moon provides us with a long-term, stable, and unique place for Earth observation. Space agencies of various countries, including the United States, China, and Italy, have made the realization of Moon-based Earth observation an objective of their lunar missions. To date, although some conceptual studies have been presented, an accurate geometric model for Moon-based Earth observation has not yet been described. This paper introduces such a geometric model, whichconnects the attitude of a Moon-based sensor with a corresponding field of view on the Earth’s surface. The aberration and light time correction are involved. Due to the lack of high-qualityexperimental data, one qualitative comparison with Chang’E lander images and another quantitative comparison with software output are made. The comparison results show good similarity. The overallmodel accuracy is evaluated to be better than 400 at current stage and will be better than 1.500 if the seleno-graphic position is accurately determined. In direct geolocation process, the aberration and light time will cause a total 0.7 km deviation on the ground near the sublunar point. In SAR range history simulation, the light time eect will lead to a linear error, as large as tens of meters, throughoutthe integration time.

Mission planning and scheduling for Earth observation space system

2020 ◽  
Vol 10 (1) ◽  
pp. 24
Author(s):  
Khaled M. Badran ◽  
Essam Eldin Salah ◽  
Gamal A. ElNashar ◽  
Amr Qamar
Keyword(s):  
Earth Observation ◽  
Mission Planning ◽  
Space System ◽  
Planning And Scheduling ◽  
Observation Space

scholarly journals PROMOTING INTERNATIONAL COLLABORATION THROUGH TRAINING AND EDUCATION IN SPACE TECHNOLOGY APPLICATIONS AND ADVANCES AMONG BIMSTEC COUNTRIES – A GOVERNMENT OF INDIA INITIATIVE

2020 ◽  
Vol XLIII-B5-2020 ◽  
pp. 29-34
Author(s):  
P. L. N. Raju ◽  
D. Chutia ◽  
N. Nishant ◽  
J. Goswami ◽  
R. Anil Kumar
Keyword(s):  
Capacity Building ◽  
National Level ◽  
Earth Observation ◽  
Knowledge Network ◽  
International Level ◽  
Space Technology ◽  
Joint Research ◽  
Space Applications ◽  
Use Of Space ◽  
North East

Abstract. India is one of the top space-faring nations in the world, which not only to build satellites and launches them using indigenously developed launch vehicles but also spearheads the use of space technology for many applications at the national and international level. Training, education and capacity building (TECB) are important components in promoting the use of space technology, thereby benefitting the society. North Eastern Space Applications Centre (NESAC) is one of many institutions under the umbrella of Indian Space Research Organisation (ISRO), Department of Space (DOS) which is responsible for promoting TECB at National level. ISRO / DOS also supports TECB at an International level through many initiatives such as IIRS – ITC JEP, UN-CSSTEAP, CEOS, UNSPIDER, UN-FAO, WMO, Commonwealth, and BIMSTEC etc. NESAC established in 2000, initiated capacity building and spearheaded Outreach programs from 2019 in the North East Region of India. Prime Minister of India announced in the plenary meeting of BIMSTEC(Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation) Summit at Kathmandu, Nepal in August 2018, recognizing NESAC to conduct space technology training programs of two weeks and 3 months for BIMSTEC Countries every year for the next five years with full financial support from Government of India. The first two week training program on “capacity building on the earth observation applications and research” was successfully conducted for 24 participants, four participants each representing Bangladesh, Bhutan, Thailand, Myanmar, Nepal, and Sri Lanka. The participants are from User Departments, Science and Technology Ministries, Space Organizations and Academia and Research Institutions. The training benefitted the participants from state of the art training facilities and experienced faculties from NESAC/ISRO/Academia from across India. The summary of feedback from the participants (excellent – 57%, good – 40%, average – 2.6% and poor – 0.4%) indicates that the course is very much useful as it has enhanced their knowledge in earth observation, geospatial analysis capabilities that will be put into use on their return. The training and capacity building has opened new vistas of cooperation and possible collaboration between BIMSTEC countries ranging from availing satellite data, expansion and access to data sharing portals, creating knowledge network to promote young researchers and expert sharing within the region, further to expand the capacity building by initiating distance learning programs, taking up joint research and application projects, etc. The rich experience of conducting a unique program, one of its kind and detailed feedback and possible expansion of BIMSTEC programs in the future is presented in the paper.

scholarly journals Mission planning and scheduling for Earth observation space system

2020 ◽  
Vol 10 (1) ◽  
pp. 24
Author(s):  
Amr Qamar ◽  
Essam Eldin Salah ◽  
Khaled M. Badran ◽  
Gamal A. ElNashar
Keyword(s):  
Earth Observation ◽  
Mission Planning ◽  
Space System ◽  
Planning And Scheduling ◽  
Observation Space

scholarly journals Ensaios laboratoriais em segmentação de imagens THEOS de parte do litoral norte paulista como requisito aos mapeamentos regionais de uso da Terra e cobertura vegetal

2017 ◽  
Vol 5 (2) ◽  
pp. 202
Author(s):  
Gilberto Pessanha Ribeiro ◽  
Artur Willcox dos Santos ◽  
Ubiratran De Souza Dias Junior
Keyword(s):  
Rio De Janeiro ◽  
Technology Development ◽  
Sao Paulo ◽  
Earth Observation ◽  
São Paulo ◽  
Space Technology ◽  
Development Agency ◽  
Earth Observation Satellite

De demandas de mapeamento cartográfico temático no contexto do projeto de pesquisa "Aplicação de geotecnologias na orientação do uso da Terra com base nos Impactos das mudanças climáticas globais: sub bacias hidrográficas litorâneas do estado de São Paulo e do estado do Rio de Janeiro", liderada pela Faculdade de Engenharia da UERJ e da colaboração eficaz com o Instituto Geológico do Estado de São Paulo, financiado pela FAPESP e FAPERJ, mapas foram produzidos de uso da Terra e cobertura vegetal, tanto com uso da banda pancromática como multiespectrais do sistema THEOS. Trata-se do sensor acoplado ao satélite tailandês THEOS (Thailand Earth Observation Satellite), que é o primeiro equipamento para observação da Terra naquele país, lançado em 1º de Outubro de 2008 por GISTDA - Geo-Informatics and Space Technology Development Agency. A fim de realizar experimentos de laboratório com imagens desse sistema, optou-se por usá-lo em mapeamento dos municípios costeiros paulistas Caraguatatuba e Ubatuba, e o mesmo foi feito com os municípios fluminenses de Paraty, Angra dos Reis e Mangaratiba. Os resultados deste mapeamento estão disponíveis em www.georeferencial.com.br e são aqui apresentados. Foram empregadas técnicas de processamento digital de imagens com uso dos sistemas SPRING e ENVI, e as escalas cartográficas finais 1/125.000 e 1/10.000, com bandas multi e pan, respectivamente. Serão destacados métodos de segmentação e de classificação supervisionada, com o objetivo de identificação de padrões de uso da Terra e cobertura vegetal. Resultados posteriores serão apresentados em relação ao mapeamento das planícies costeiras em face da explosão populacional e imobiliária de grande valor patrimonial nas zonas costeiras.

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