Results 231 to 240 of about 5,444,146 (281)

Possible European Systems for Space Situational Awareness

Acta Astronautica, 2010
Abstract As defined by ESA, space situational awareness (SSA) is the understanding and maintained awareness of the Earth orbital population, the space environment and possible threats to space assets. Space situational awareness is then understood as an upper-set of space surveillance. European SSA is relatively poor and many studies are performed in
Thomas Schildknecht
exaly   +3 more sources

Building Space Situational Awareness Capability

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011, 2011
Space Situational Awareness (SSA) is crucial for the safety of valuable space assets and the services provided by them. Some examples of these services are navigation, communication, broadcasting, environment protection, earth observation, meteorology and science.
Osman Kalden, Christian Bodemann
exaly   +2 more sources

Observability Analysis for Space Situational Awareness

, 2020
Space operations from the dawn of the Space Age have resulted in a large, and growing, resident space object population. However, the availability of sensor resources is limited, which presents a challenge to Space Situational Awareness applications. When direct communication with an object is not possible, whether that is due to a lack of access for ...
Friedman, Alex M
openaire   +2 more sources

Supporting Situation-Awareness in Smart Spaces

2012
This paper reports results from the ongoing research relating to the development on the context ontology described with OWL (Web Ontology Language). Our aim is to reach relevant context ontology for smart spaces that are by their nature heterogeneous, pervasive and ubiquitous.
Susanna Pantsar-Syväniemi, Jarkko Kuusijärvi, Eila Ovaska   +2 more
openaire   +3 more sources

Collaborative sensor scheduling for space situational awareness

2012 IEEE Statistical Signal Processing Workshop (SSP), 2012
In this paper, we investigate a method for simultaneously scheduling multiple space surveillance sensors that has the potential to exploit measurement level sensor fusion to improve orbital state estimation accuracy. State error covariance information is used to predict the influence independent and combined measurements will have on estimation ...
Hobson, Tyler A., Clarkson, I. Vaughan L.   +1 more
openaire   +3 more sources

Dynamic sensor tasking for Space Situational Awareness

Proceedings of the 2010 American Control Conference, 2010
This paper examines the problem of tracking multiple spacecraft using a combination of ground- and spacebased sensors. The problem is formulated in a simplified twodimensional setting to reduce computational complexity while retaining elements of the problem that pose theoretical or practical difficulties (such as inverse square-law dynamics).
Richard Scott Erwin, Paul Albuquerque, Sudharman K. Jayaweera, Islam I. Hussein   +3 more
openaire   +2 more sources

Track before Detect for Space Situation Awareness

2015 International Conference on Digital Image Computing: Techniques and Applications (DICTA), 2015
This article considers the application of multi-target tracking algorithms to Space Situation awareness. The sensor is a telescope fitted with an optical band digital camera. Two different tracking paradigms are demonstrated: the first approach is a detect-then-track method that uses frame-to-frame registration to model the star field and detect a ...
Samuel J. Davey, Travis Bessell, Brian Cheung, Mark Rutten   +3 more
openaire   +2 more sources

Space situational awareness: an overview

2010
In the past 20 years we have experienced rapid growth in the launch of space assets by dozens of nations and operators, mostly for communications and entertainment (TV) purposes but also to provide increased services for the public in general (navigation systems for example) and for the military in particular.
Giovanni Gasparini, Valérie Miranda
openaire   +1 more source