[Show abstract][Hide abstract] ABSTRACT: Within the European Space Agency’s (ESA) General Support and Technology Programme (GSTP), the Project for On-Board Autonomy (PROBA) missions provide a platform for in-orbit technology demonstration. Besides the technology demonstration goal, the satellites allow to provide services to, e.g., scientific communities. PROBA1 has been providing multi-spectral imaging data to the Earth observation community for a decade, and PROBA2 provides imaging and irradiance data from our Sun to the solar community. This article gives an overview of the PROBA2 mission history and provides an introduction to the flight segment, the ground segment, and the payload operated onboard. Important aspects of the satellite’s design, including onboard software autonomy and the functionality of the navigation and guidance, are discussed. PROBA2 successfully proved again within the GSTP concept that it is possible to provide a fast and cost-efficient satellite design and to combine advanced technology objectives from industry with focussed objectives from the science community.
[Show abstract][Hide abstract] ABSTRACT: The aim of the ESA study on concepts for demonstration of advanced techniques and technologies on an EO small mission is to
assess ideas for EO missions compatible with implementation on a small satellite such as PROBA, and which may benefit from
Formation Flying. “Small Mission” here implies small satellite platforms in the 150–200kg spacecraft mass range. The output
of the study is a definition of various small satellite missions and their required developments, including costs. The study
has been led by Astrium Ltd, with support from Astrium SAS, Astrium GmbH, ENVEO, GMV and Verhaert Space. Following initial
selection in the first part of the study, 3 candidates have been analysed in more detail as discussed below.
[Show abstract][Hide abstract] ABSTRACT: The Aerosol Land Mission (AERL) has been investigated within a study on concepts for advanced techniques that are compatible with implementation on a small satellite in the 150-200 kg range of total mass. AERL addresses the need for improved observations of atmospheric aerosol over land surfaces for air pollution control and climate research. The mission employs two instruments for multidirectional and multispectral measurements of reflected solar radiance. For measuring the columnar aerosol optical depth and properties a triple-view spectral imager with narrow band-pass filters in the 420 nm-910 nm spectral range is applied. Information on vertical layering of aerosol is obtained by dual view measurements of a grating spectrometer in the 757 nm-775 nm spectral range (oxygen A band).
[Show abstract][Hide abstract] ABSTRACT: The aim of the ESA study on concepts for demonstration of advanced
techniques and technologies on an EO ('Earth Observation') Small Mission
is to identify, assess and trade-off ideas for EO missions which are
compatible with implementation on a small satellite such as PROBA, and
which may benefit from Formation Flying. "Small Mission" here implies
small satellite platforms of the micro- and mini-sat class of up to 150
kg total spacecraft mass (e.g. PROBA, DMC, Myriade, etc.). The output of
the study will comprise a definition of a mission and required
developments, including costs. The study is led by Astrium Ltd, with
support from Astrium SAS, Astrium GmbH, ENVEO, GMV and Verhaert Space.
Following an initial selection in the first part of the study, 3
candidates are now being analysed in Part 2 as discussed in this paper:
the TOPOLEV Topographic Levelling Mission, the C- PARAS Mission based on
formation flying with Sentinel 1, and the AERL Aerosol Land Mission. In
Phase 1 of this Definition Study of Concepts for Demonstration of
Advanced Techniques and Technologies on an EO Small Mission about 40
ideas for EO missions compatible with implementation on a small
satellite and which may benefit from formation flying were identified,
assessed and traded off. This has led to the selection of 3 candidates
to be studied further in Phase 2: the Topographic Levelling mission
(TOPOLEV), a C-band PAssive RAdar Satellite(s) (C- PARAS) mission, and
the Aerosol Land Mission (AERL). The study comprises a definition of the
missions and payloads, accommodation requirements, performance and
exploitation, along with estimated mission costs.