Hi all: I am in the process of designing a project for school. This project requires a GPS sensor and a barometric pressure sensor to determine position in space. I have not much knowledge about sensors yet but I am trying. I have spent several hours googling a few terms and so far I came up with the Garmin 18 GPS sensor, and I am still not sure which barometric pressure sensor I will use. These sensors have to communicate to a basic stamp 2pe microprocessor. My question to you guys is: do you know of any sensors (GPS and/or barometric) that I should research for this project? Or may be you could tell me from where I could scavange these sensors. Any help will be greatly appreciated.