japanese
next > A-1: The location of YCAM where this installation space exists. A-2 Changes in GPS: ID number and sensitivity (0-100dB) of each GPS that is in the sky above the installation site are indicated, and the moving direction of GPS is shown as the locus. (As the sensitivity turns stronger, light flashes brighter and the dynamics affecting the space becomes stronger, whereas lesser sensitivity causes slower, weaker flashes and gradual disappearance.)
A: The position / GPS satellites as an observation point from the outside. When it thinks about the theme of "gravity and resistance", it is important to be a position to observe and receive in this action. We have only the observation point of the subjectivity. We can't see outside from ourselves because we have only the observation point of the subjectivity. However, an objective observation point can be created by totaling many observation points. We used GPS system for this work, and expanded the range of this installation. GPS is the abbreviation of Global Positioning System, and it is the system known widely as to the car navigation, it detect the receivers position on the earth by using exclusive satellites.
	fig.1 GPS satellites' and our distance is a very far observation point in the relations which the diagram shows. A distance from three satellites is measured, and the error of the time is revised from one more satellite. Four and more satellite is necessary in the minimum to work. Multitude of GPS satellites always exist in our sky.