AACCS: analytical approach to candidate constellation selection AAO: Anglo-Australian Observatory AAVSO: American Association of Variable Star Observers ACP: Aerosol Collector and Pyrolyser ADF: Astrophysics Data Facility AFSCN: Air Force Space Command network ALaMO: Automated Lunar and Meteor Observatory ALPO: Association of Lunar and Planetary Observers ANSI: American National Standards Institute APO: Apache Point Observatory ARC: Ames Research Center ASI: Agenzia Spaziale Italiana AU: astronomical unit AW&ST: Aviation Week and Space Technology BAA: British Astronomical Association BAO: Beijing Astronomical Observatory BATSE: Burst and Transient Source Experiment BH: Black Hole BNSC: British National Space Center BNSC: British National Space Centre CASJ: Canadian Aeronautics and Space Journal CASJQ: Canadian Aeronautics and Space Journal Quarter CCD: Charge Coupled Device CCD: charge-coupled device CD: Cordoba Durchmusterung CDSF: Commercially Developed Space Facility CG: Center of Gravity CHARA: Center for High Angular Resolution Astronomy CNSA: China National Space Administration CNSR: Comet Nucleus Sample Return COSPAR: Committee on Space Research COSTAR: Corrective Optics Space Telescope Axial Replacement CSA: Canadian Space Agency DPOSS: Digitized Palomar Observatory Sky Survey DSN: Deep Space Network DSS: Deep Space Station DWE: Doppler Wind Experiment EGRET: Energetic Gamma Ray Explorer Telescope EJASA: Electronic Journal of the Astronomical Society of the Atlantic ERBS: Earth Radiation Budget Satellite