ground based telescopes are better suited for heavier WIMPs. The large field-of-view of GLAST also makes it well suited for measurements of the diffuse gamma ray background. GLAST is also expected to detect a number of unidentified sources, some of which could potentially be signals of dark matter substructures. Follow up observations with ground based gamma ray telescopes would be very useful for clarifying the nature of such sources.

Antimatter
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WIMP annihilations in the galactic halo generate charged anti-matter particles: positrons, anti-protons and anti-deuterons. Unlike gamma rays, which travel along straight lines, charged particles move under the influence of the Galactic Magnetic Field, diffusing and losing energy, resulting in a diffuse spectrum at Earth. By studying the cosmic anti-matter spectra, satellite-based experiments such as PAMELA [@pamela] and AMS-02 [@ams02] may be able to identify signatures of dark matter. PAMELA began its three-year satellite mission in June of 2006. AMS-02 is planned for later deployment onboard the International Space Station.

As compared to antiprotons and antideuterons, cosmic positrons are attractive probes of dark matter for several reasons. In particular, positrons lose the majority of their energy over typical length scales of a few kiloparsecs or less [@baltzpos]. The cosmic positron 