This volume contains the proceedings of the Second International Workshop on Mobile Entity
Localization and Tracking in GPS-less Environments (MELT 2009) held in Orlando Florida on
September 30 2009 in conjunction with the 11th International Conference on Ubiquitous
Computing (Ubicomp 2009). MELT provides a forum for the presentation of state-of-the-art
technologies in mobile localization and tracking and novel applications of location-based s-
vices. MELT 2009 continued the success of the ?rst workshop in the series (MELT 2008) which
was held is San Francisco California on September 19 2008 in conjunction with Mobicom.
Location-awareness is a key component for achieving context-awareness. - cent years have
witnessed an increasing trend towards location-based services and applications. In most cases
however location information is limited by the accessibility to GPS which is unavailable for
indoor or underground fac- ities and unreliable in urban environments. Much research has been
done in both the sensor network community and the ubiquitous computing community to provide
techniques for localization and tracking in GPS-less environments. Novel applications based on
ad-hoc localization and real-time tracking of - bile entities are growing as a result of these
technologies. MELT brings together leaders from both the academic and industrial research
communities to discuss challenging and open problems to evaluate pros and cons of various
approaches to bridge the gap between theory and applications and to envision new research
opportunities.
