Development of an L-Band SAR Microsatellite Antenna for Earth Observation

Urata, Katia Nagamine; Sumantyo, Josaphat Tetuko Sri; Santosa, Cahya Edi; Viscor, Tor

doi:10.3390/aerospace5040128

Cited by 17 publications

(5 citation statements)

References 14 publications

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“…Therefore, they are more susceptive to atmospheric drag (Urata et al, 2018), directly resulting in a much shorter lifetime. More importantly, the disturbances of the atmosphere would disturb the platform altitude control and antenna pointing capability, especially considering the small size and light weight of microsatellites.…”

Section: Contributions and Limitations Of This Studymentioning

confidence: 99%

Monitoring Summertime Erosion Patterns Over an Arctic Permafrost Coast with Recent Sub-meter Resolution Microsatellite SAR Data

Tsai

2024

Preprint

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Abstract. Arctic coasts experience some of the highest rates of erosion in the world, particularly due to permafrost degradation resulting from the recent exacerbation of climate change. Therefore, not only have coastal defense and energy facilities been threatened, but maintenance costs for the infrastructure of cold regions have also risen. To monitor the coastal erosion pattern of the circum-Arctic, earlier studies often employ spaceborne or airborne optical multi-spectral images to depict shoreline changes, which are limited by frequent clouds and haze in Arctic regions and, thus, hamper the time-series analysis. Instead, this study aims to explore the synthetic aperture radar (SAR) images, especially the recently developed microsatellite SAR data, which provide unprecedented high-resolution at a sub-meter scale, to measure the summertime spatio-temporal dynamics of an ice-rich permafrost coast along the Beaufort Sea, Alaska. The results reveal a maximum shoreline change envelope (SCE) of 64.89 m during the three-month study period. To examine the differences between the estimations and the observations derived from the conventional Sentinel-1 data, the proposed multi-stage statistical-driven scheme is used. A statistically significant positive relationship between two depicted SCEs with the presence of heteroscedasticity is confirmed. In detail, the agreement between two SCEs increases with the magnitude of the SCE, indicating that the microsatellite SAR can depict more trivial changes in coastline positions. Founded on the results and detailed discussion on the uniqueness and limitations of current SAR sensors, the promising opportunity to utilize the blooming microsatellite SAR datasets for coastal monitoring is highlighted.

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Section: Contributions and Limitations Of This Studymentioning

confidence: 99%

Monitoring Summertime Erosion Patterns Over an Arctic Permafrost Coast with Recent Sub-meter Resolution Microsatellite SAR Data

Tsai

2024

Preprint

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“…Recent proposals have showcased the usage of a circularly polarized antennas operating at different center frequencies. The L-band study [14], centered in the frequency of 1.275 GHz, pointed to a 15-30 km swath width and resolution of 10-30 m in an orbit of 500-600 km. The C-band investigation [15] unveiled a system centered at 5.3 GHz, with a swath width larger than 15 km and a spatial resolution of 5-15 m for a SSO within 400-550 km.…”

Section: Satellite-borne Sarmentioning

confidence: 99%

Challenges of the SAR-Enabled Microsatellite Concept INFANTE

Ferreira

Andrada

Correia

et al. 2021

Adv. Astronaut. Sci. Technol.

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The INFANTE project is a public-private initiative arising from the experience of Portuguese companies and R&D institutes in developing critical subsystems for space missions over the last 20 years. Using such building blocks, TEKEVER leads a consortium of 20+ entities currently developing a technology demonstrator microsatellite for Earth Observation. This paper addresses a set of technical challenges faced in the conceptualization of a satellite-borne SAR, along with new project-level approaches within the framework of new space while managing a large consortium of partners.

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“…Here, the private company ICEYE recently launched low-coast SAR (X-band) microsatellites into orbit. Moreover, Urata et al [227] presented the development of a compact synthetic aperture radar microsatellite antenna system (ChibaSat) operating in the L-band.…”

Section: Future Spaceborne L-band Systemsmentioning

confidence: 99%

Spaceborne L-Band Synthetic Aperture Radar Data for Geoscientific Analyses in Coastal Land Applications: A Review

Ottinger

Kuenzer

2020

Remote Sensing

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The coastal zone offers among the world’s most productive and valuable ecosystems and is experiencing increasing pressure from anthropogenic impacts: human settlements, agriculture, aquaculture, trade, industrial activities, oil and gas exploitation and tourism. Earth observation has great capability to deliver valuable data at the local, regional and global scales and can support the assessment and monitoring of land- and water-related applications in coastal zones. Compared to optical satellites, cloud-cover does not limit the timeliness of data acquisition with spaceborne Synthetic Aperture Radar (SAR) sensors, which have all-weather, day and night capabilities. Hence, active radar systems demonstrate great potential for continuous mapping and monitoring of coastal regions, particularly in cloud-prone tropical and sub-tropical climates. The canopy penetration capability with long radar wavelength enables L-band SAR data to be used for coastal terrestrial environments and has been widely applied and investigated for the following geoscientific topics: mapping and monitoring of flooded vegetation and inundated areas; the retrieval of aboveground biomass; and the estimation of soil moisture. Human activities, global population growth, urban sprawl and climate change-induced impacts are leading to increased pressure on coastal ecosystems causing land degradation, deforestation and land use change. This review presents a comprehensive overview of existing research articles that apply spaceborne L-band SAR data for geoscientific analyses that are relevant for coastal land applications.

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Development of an L-Band SAR Microsatellite Antenna for Earth Observation

Cited by 17 publications

References 14 publications

Monitoring Summertime Erosion Patterns Over an Arctic Permafrost Coast with Recent Sub-meter Resolution Microsatellite SAR Data

Monitoring Summertime Erosion Patterns Over an Arctic Permafrost Coast with Recent Sub-meter Resolution Microsatellite SAR Data

Challenges of the SAR-Enabled Microsatellite Concept INFANTE

Spaceborne L-Band Synthetic Aperture Radar Data for Geoscientific Analyses in Coastal Land Applications: A Review

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