Search Results

This specification covers insulated wire for use in external aircraft antennas.

SAE AeroConnect Challenge universities will think critically about emerging technology issues relevant to connected aircraft industry.

Check out the topics of discussion at the 2024 AeroTech event, such as aircraft systems, advanced air mobility, manufacturing and materials, and so much more!

Through SAE AeroConnect Challenge, universities think critically about emerging technology issues relevant to connected aircraft industry.

Through SAE AeroConnect Challenge, universities think critically about emerging technology issues relevant to connected aircraft industry.

Through SAE AeroConnect Challenge, universities think critically about emerging technology issues relevant to connected aircraft industry.

In this paper, a method to analyze microstrip antennas for aircraft applications is presented. Also, the main steps to be followed in the design of microstrip antennas are indicated. ...Also, the main steps to be followed in the design of microstrip antennas are indicated.

Further decoupling between Panels and between Tiles has allowed the ASAR Antenna Thermal design to be verified at SubSystem level rather than at full Antenna level. The Thermal Control of the Antenna in OFF modes, using heaters and thermostats, had to be optimised in order to minimise the number of heater circuits and the heater power consumed. ...The Thermal design of the ENVISAT-1 ASAR Active Antenna has provided many engineering challenges. The selection of the Thermal Control has been complicated by the need to dissipate the high power (1300 watts) generated by the active equipments that are mounted on the Antenna Tile Sub-System directly behind the radiating surface. ...The selection of the Thermal Control has been complicated by the need to dissipate the high power (1300 watts) generated by the active equipments that are mounted on the Antenna Tile Sub-System directly behind the radiating surface. This high power has to be dissipated from the Antenna whilst minimising heater power consumption.

This paper presents the status of the telecommunication antennas that have been designed and manufactured within the development of the HERMES shuttle Rigid External Insulation. ...From the preliminary radio-frequency tests at high temperature to the complete C/SiC shingle antenna prototype, the design drivers, evaluation tests and manufacturing choices are discussed.

This specification covers insulated wire for use in external aircraft antennas.

This specification describes the functionality and interfaces of an Internet Protocol (IP)-based wireless communications system between an aircraft on the ground and a ground-based network using Wireless Local Area Network (WLAN) and/or cellular radios and protocols. ...The ground-based network will be primarily used to provide connectivity to an airline's back office or to its back-end maintenance systems although other uses are also possible when there is a need to transfer data to or from the aircraft's applications while it is taxiing or parked. Gatelink is the accepted industry term for this type of connection.

HALCA is a scientific satellite with a large deployable antenna to make experiments on space VLBI. The deployable antenna, developed under the requirements of large aperture area and accurate reflector surface, is formed of complicated structures and lots of mechanisms. ...Though heat exchange in the antenna was complicated and difficult to evaluate, antenna thermal performance in orbit was within expectations and all mechanisms were adequately controlled until the antenna deployment. ...Though heat exchange in the antenna was complicated and difficult to evaluate, antenna thermal performance in orbit was within expectations and all mechanisms were adequately controlled until the antenna deployment. This paper describes thermal control design of the large deployable antenna, thermal design verification in the thermal balance test, and evaluation of performance in orbit.

The Sentinel-1 SAR antenna is a large foldable planar phased array antenna which is formed by a centre panel and two antenna side wings. ...The Sentinel-1 SAR antenna is a large foldable planar phased array antenna which is formed by a centre panel and two antenna side wings. Once deployed, the antenna is more than 12 m long with a width of 1 m. Its mass is about 900 kg. ...The design is largely settled and the SAR Antenna CDR thermal analysis campaign is about to start. The environmental tests on Antenna Tile STM level (see details on verification approach) are planned for end of the year.

Two methods for measuring thermal distortion of antenna dishes under simulated space conditions are described: Photogrammetry Holography With modern photogrammetry an absolute resolution of 20 μm at 1 σ for antenna dishes with a diameter of 1 to 3 m can be achieved. ...Two methods for measuring thermal distortion of antenna dishes under simulated space conditions are described: Photogrammetry Holography With modern photogrammetry an absolute resolution of 20 μm at 1 σ for antenna dishes with a diameter of 1 to 3 m can be achieved. Statistical methods are used to evaluate the 10 to 30 pictures of the test item which are taken from different positions.

The overall goal of this program was the development of a 10 m. diameter, self-deployable antenna based on an open-celled rigid polyurethane foam system. Advantages of such a system relative to current inflatable or self-deploying systems include high volumetric efficiency of packing, high restoring force, low (or no) outgassing, low thermal conductivity, high dynamic damping, mechanical isotropy, infinite shelf life, and easy fabrication with methods amenable to construction of large structures (i.e., spraying). ...As part of a NASA Phase II SBIR, Adherent Technologies and its research partners, Temeku Technologies, and NASA JPL/Caltech, conducted activities in foam formulation, interdisciplinary analysis, and RF testing to assess the viability of using open cell polyurethane foams for self-deploying antenna applications.

Several last-generation and future satellite communication systems require the use of large deployable antennas. A European product in this field is presently not available: in this frame the European Space Agency assigned a contract for the development of the Large Deployable Antenna Reflector for advanced mobile communications (LDA). ...A European product in this field is presently not available: in this frame the European Space Agency assigned a contract for the development of the Large Deployable Antenna Reflector for advanced mobile communications (LDA). The project is driven by ALENIA SPAZIO as prime contractor and system designer with the support of other companies: EGS (Russia), HTS (Switzerland), SENER (Spain), Magna (Austria). ...The project is driven by ALENIA SPAZIO as prime contractor and system designer with the support of other companies: EGS (Russia), HTS (Switzerland), SENER (Spain), Magna (Austria). The Antenna consists of a paraboloid with 12m in projected aperture, 6.3m of focal length and located with a clearance of 3m from the focal axis.

The spacecraft will also include a dual frequency (Ku- and S-band) High Gain Antenna (HGA) which will serve as the primary system for transmitting the science data and spacecraft telemetry & command data to the ground via the TRDSS (Tracking and Data Relay Satellite System) network. ...The HGA assembly system thermal analysis includes transient thermal analysis for all operational and non-operational modes, with the antenna in the deployed and stowed configurations. The results of the analysis confirm that the overall thermal design adequately protects the HGA antenna from its environment. ...The results of the analysis confirm that the overall thermal design adequately protects the HGA antenna from its environment. The flight model of the HGA assembly is currently being integrated and is scheduled to go into thermal balance testing in late 1995.

The objective of the Laser Interferometer Space Antenna (LISA) mission is the detection of low-frequency gravitational waves. The fluctuation of the distance of test masses inside 3 spacecraft’s which are located 5·106km apart is measured with an accuracy of 10−12m to achieve this.

The purpose of this document is to establish guidance for Aircraft Support Data Management (ASDM). This guidance is intended for operators (e.g., pilot-in-command, maintenance activities, renter-pilot, or air carrier certificate holder) of transport aircraft. ...., pilot-in-command, maintenance activities, renter-pilot, or air carrier certificate holder) of transport aircraft.