There are a several other specialized conferences each year as well as papers in other journals. This bound set of flip charts covers the GPS at a moderate level of technical detail without any equations. The 160 page booklet has about 80 figures. The discussions of Military Receivers are only a little dated. Much of the equipment described will be in active use for some time to come.
Many figures are very useful in describing the system to newcomers.
Table of Contents Wells et al. Guide to GPS Positioning is a book of viewgraphs published in 1986 by a group of Canadian scientist working in GPS Surveying. It has a short description of each view graph. The book covers the material in fairly good depth with plenty of graphs, drawings and equations. This is an excellent source of figures for describing GPS and GPS Surveying.