A5088503804- Spacecraft Design and Technology
- Spacecraft Dynamics and Control
- Inertial Sensor and Navigation
- Space Satellite Systems and Control
- Astro and Planetary Science
- Infrared Target Detection Methodologies
- Satellite Communication Systems
- Advanced Optical Sensing Technologies
- Astronomical Observations and Instrumentation
- Planetary Science and Exploration
- Atmospheric aerosols and clouds
- Real-time simulation and control systems
- Remote Sensing in Agriculture
- Sustainable Agricultural Systems Analysis
- Astronomy and Astrophysical Research
- Smart Agriculture and AI
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Solar and Space Plasma Dynamics
- Radiation Effects in Electronics
- Space exploration and regulation
- Stellar, planetary, and galactic studies
- Distributed systems and fault tolerance
- Organic Food and Agriculture
- Real-Time Systems Scheduling
- CCD and CMOS Imaging Sensors
Tartu Observatory
2013-2023
University of Tartu
2013-2023
This paper presents the mission analysis, requirements, system design, level test results, as well mass and power budgets of a 1-unit CubeSat ESTCube-1 built to perform first in-orbit demonstration electric solar wind sail (E-sail) technology.The E-sail is propellantless propulsion concept that uses thin charged electrostatic tethers for turning momentum flux natural plasma stream, such wind, into spacecraft propulsion.ESTCube-1 will deploy charge 10 m long tether measure changes in...
In this article, we report on the in-orbit experience - an overview of ESTCube-1 operations from launch until experiment, as well lessons learned five years development and almost two operations. Lessons are identified point view system engineering, electrical mechanical software testing measurements, payload, management. Detailed flight results will be provided in dedicated articles. We hope that other teams can benefit our experience.
Nanosatellites have established their importance in low-Earth orbit (LEO), and it is common for student teams to build them educational technology demonstration purposes. The next challenge the maturity deep-space missions. LEO serves as a relevant environment maturing spacecraft design. Here we present ESTCube-2 mission, which will be launched onboard VEGA-C VV23. satellite was developed demonstrator future mission by Estonian Student Satellite Program. ultimate vision of program use...
The Copernicus Sentinel-2 mission operated by the European Space Agency (ESA) provides comprehensive and continuous multi-spectral observations of all Earth’s land surface since mid-2015. Clouds cloud shadows significantly decrease usability optical satellite data, especially in agricultural applications; therefore, an accurate reliable mask is mandatory for effective EO data exploitation. During last few years, image segmentation techniques have developed rapidly with exploitation neural...
This paper presents the characterization and in-orbit validation of ESTCube-1 attitude determination system (ADS). is a one-unit CubeSat built by students launched on May 7, 2013, to Sun-synchronous, 700-km, polar low Earth orbit. Its primary mission centrifugally deploy tether as part first demonstration electric solar wind sail (i.e., E-sail) technology. The ADS uses magnetometers, gyroscopic sensors, Sun an unscented Kalman filter for determination. Here performance commercial...
Short temporal baseline regular Synthetic Aperture Radar (SAR) interferometry is a tool well suited for wide area monitoring of agricultural activities, urgently needed in European Union Common Agricultural Policy (CAP) enforcement. In this study, we demonstrate and describe detail, how mowing ploughing events can be identified from Sentinel-1 6-day interferometric coherence time series. The study based on large dataset 386 dual polarimetric VV/VH SAR 351 Sentinel-2 optical images, nearly...
This paper presents the design, development, and pre-launch characterization of ESTCube-1 Attitude Determination Control System (ADCS).The design driver for ADCS has been mission requirement to spin up satellite 360 deg•s -1 with controlled orientation axis acquire angular velocity attitude during scientific experiment.ESTCube-1 is a one-unit CubeSat launched on 7 May 2013, 2:06 UTC board Vega VV02 rocket.Its primary measure Coulomb drag force exerted by natural plasma stream charged tether...
This paper presents the design, implementation, and pre-launch test results of Command Data Handling Subsystem (CDHS) for ESTCube-1.ESTCube-1 is a one-unit CubeSat, which will perform an electric solar wind sail experiment.The development process CDHS ESTCube-1 was focused on robustness fault tolerance.A combination hot cold hardware redundancy implemented.Software, including custom-written internal communications protocol, designed to increase system's tolerance further by providing...
Here we present the development and qualification of highly integrated satellite avionics stack ESTCube-2, a three-unit CubeSat carrying various in-orbit demonstration payloads. The primary payload is Plasma Brake (PB), which novel deorbiting technology for low Earth orbit (LEO) satellites. observation (EOP) consists two cameras imaging planet in 660 nm 857 spectral bands. Finally, Corrosion Testing Space (CTS) experiment will study behavior nanostructured coating LEO environment. A major...
We propose a distributed close-range survey of hundreds asteroids representing many asteroid families, spectral types and sizes. This can be implemented by fleet nanospacecraft (e.g., 4-5-unit CubeSats) equipped with miniature imaging instruments (from near ultraviolet to infrared). To enable the necessary large delta-v, each spacecraft carries single electric sail tether which taps momentum from solar wind. Data are stored in flash memory during mission downlinked at an Earth flyby. keeps...
This paper presents a novel low-power imaging system for nanosatellite proximity operations.A robust independent camera module with on-board image processing, based on the ARM Cortex-M3 microcontroller and fast static random access memory, has been developed characterized requirements of ESTCube-1 mission.The system, optimized use in single unit CubeSat, utilizes commercial off-the-shelf components standard interfaces cost-effective reusable design.The resulting 43.3 mm × 22 44.2 (W H D)...
During the course of a space mission unexpected events can occur regardless rigorous testing. In order to ensure ability spacecraft recover and adapt new situations, it may be necessary update firmware for resolving software issues, work around hardware problems, or introduce features. The importance remote updates as well method calculate an indicative value flexibility in missions is summarized by R. Nilchiani [1].