urn:nasa:pds:context:telescope:goldstone.dss27_34m 1.0 1.13.0.0 Product_Context 2020-07-19 1.0 Original context file for the 34-m DSS-27 antenna at Goldstone. urn:nasa:pds:radiosci.documentation:dsn.810-005 instrument_to_document This reference is to a PDS collection containing several versions of the NASA Deep Space Network (DSN) Telecommunications Link Design Handbook (Document 810-005). The Handbook is maintained in a modular format to provide interface design data to flight projects using the DSN. Modules are updated as appropriate. Each member product in the PDS collection is the set of modules as they applied at that point in time. Modules include: 001 Handbook Introduction 101 70-m Subnet Telecommunications Interfaces 102 26-m Subnet Telecommunications Interfaces (omitted in 2009 and later versions) 103 34-m HEF Subnet Telecommunications Interfaces 104 34-m BWG Antennas Telecommunications Interfaces 105 Atmospheric and Environmental Effects 106 Solar Corona and Solar Wind Effects 107 Radio Source Catalog 201 Frequency and Channel Assignments 202 34-m and 70-m Doppler 203 Sequential Ranging 205 Command Service 206 Telemetry General Information 207 34-m and 70-m Telemetry Reception 208 Telemetry Data Decoding 209 Open-Loop Radio Science 210 Delta Differrential One-way Ranging 211 Wideband Very Long Baseline Interferometry 214 Pseudonoise and Regenerative Ranging 301 Coverage and Geometry 302 Antenna Positioning 303 Media Calibration 304 Frequency and Timing 305 Test Support 901 Handbook Glossary urn:nasa:pds:context:facility:observatory.dsn telescope_to_facility This context product provides more information on the NASA Deep Space Network as a whole. urn:nasa:pds:context:facility:observatory.goldstone telescope_to_facility This context product provides more information on the Goldstone Deep Space Communications Complex. urn:nasa:pds:context:instrument:dsn.rss telescope_to_instrument This context product provides more information on the commanding, radio tracking, and radio science instrumentation at the telescope. https://www.gdscc.nasa.gov/?page_id=40 An overview of antennas at the Goldstone Deep Space Communication Complex with photographs. Select the menu tab at the bottom of the page for more information on DSS-27. 34 243.223350 35.238272 1052.468 WGS 84 Ellipsoid DSS-27 is one of two high-speed beam waveguide (HSB) antennas constructed by the Jet Propulsion Laboratory at the Goldstone Deep Space Communications Complex (GDSCC) for the U.S. Army; they were transferred to NASA in 1994. The beam waveguide (BWG) design moves environmentally sensitive electronic equipment from a cone at the reflector focus into a pedestal. The radio signal is guided from the subreflector through a hole in the surface of the dish to the receiving equipment in the pedestal via a system of reflecting mirrors inside a large tube. The reverse path allows transmission. The BWG design reduces weight on the reflecting surface, provides insulation of electronics from environmental factors including dish movement, and simplifies maintenance. The HSB antenna differs from other BWG antennas in that the pedestal room is above ground level (rather than underground), the optics design is different, and the subreflector does not focus automatically for the purpose of maintaining gain as the elevation angle of the antenna changes. The HSB antenna has higher tracking rates than do other BWG antennas; thus, it is an appropriate antenna to use when tracking Earth-orbiting satellites. DSS-27 was decommissioned in the mid-2010s. When operational it could transmit 50-200 W at 2.1 GHz and receive right- or left-circularly polarized signals at 2.2 GHz.