Electronics

Direction Finding for Tracking Radar - Abstract of a technical paper, with a link to the full version in pdf format.
http://www.ll.mit.edu/asap/asap_00/procabs/hayward.htm

Space Surveilance - Descriptions of programs, equipment and capabilities by the American Federation of Scientists.
http://www.fas.org/spp/military/program/track/overview.htm

Journal of Electronic Defense - Provides coverage of defense electronic issues, focusing in particular on electronic warfare.
http://www.jedonline.com/

Combat Net Radio Operations - US Army field manual describing equipement and procedures.
https://atiam.train.army.mil:443/soldierPortal/atia/adlsc/view/public/9198-1/fm/11-32/toc.htm

Argos Press Radar Glossary - Describes key terms and abbreviations used in radar and electronic warfare.
http://www.argospress.com/Resources/radar/

Improving Communications in Urban Warfare - Rand research brief on techniques and equipment.
http://www.rand.org/pubs/research_briefs/RB3029/index1.html

Marine Corps Electronic Warfare--A Combat Power Multiplier - Historical overview, description of deployment and methods.
http://www.globalsecurity.org/military/library/report/1990/RSC.htm

Emerging Commercial Mobile Wireless Technology and Standards - Evaluated for suitability in combat. Includes as an appendix an overview of tactical radio communications.
http://www.rand.org/pubs/monograph_reports/MR960/index.html