Argos is a satellite-based data collection and location system that has been in operation since the late 1970s; it is the only such system to be dedicated solely to environmental applications. This paper shows how multiple and sometimes conflicting ways of envisioning and studying the global environment have been embodied in the Argos system. In particular, it shows how the system’s initial focus on meeting the needs of meteorologists and oceanographers made it difficult for wildlife biologists, who were interested in tracking the long-distance movements of animals, to use Argos tags. Physical environmental scientists’ vision of the global environment as a ‘volume of flows’ dictated their need for regular, precise, standardized sampling stations distributed in a grid across and above the Earth’s surface. Biologists interested in the interactions of individual animals and populations in a ‘web of life’, in contrast, demanded a flexible system of global access to the movements of individual bodies. Until the mid-1980s, the unit of the French space agency responsible for Argos resisted changes to the system that would have made it easier for biologists to deploy lightweight, low-reliability tags. It was only after the quasi-commercialization of the system in 1986 that it began to make significant concessions to the needs of biologists. The history of Argos suggests that individual infrastructures of environmental observation can host multiple and conflicting global environmental visions and that commercialization, at least within certain constraints, has provided opportunities for such visions to proliferate.