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In-Service Fiber Optic Inspection, Evaluation, and Cleaning, Best Practices, Expanded Beam Termini

AS-3 Fiber Optics and Applied Photonics Committee
  • Aerospace Standard
  • ARP6283/1
  • Current
Published 2020-03-18 by SAE International in United States
This document provides user information on best practice methods and processes for the in-service inspection, evaluation, and cleaning of expanded beam (EB) fiber optic interconnect components (termini, alignment sleeves, and connectors), test equipment, and test leads based on the information provided in AIR6031 and ARP6283. This document provides the user with a decision-making tool to determine if the fiber optic components are acceptable for operation with EB fiber optic termini.
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In-Service Fiber Optic Inspection, Evaluation, and Cleaning, Best Practices, Multi-Fiber Push on Termini

AS-3 Fiber Optics and Applied Photonics Committee
  • Aerospace Standard
  • ARP6283/2
  • Current
Published 2020-03-18 by SAE International in United States
This document provides user information on best practice methods and processes for the in-service inspection, evaluation, and cleaning of multi-fiber push on (MPO) (referred to as multi-fiber) fiber optic interconnect components, test equipment, and test leads based on the information provided in AIR6031 and ARP6283. This document provides the user with a decision-making tool to determine if the fiber optic components are acceptable for operation with multi-fiber fiber optic termini.
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Fundamentals in Wire Selection and Sizing for Aerospace Applications

AE-7C Systems
  • Aerospace Standard
  • AIR6540A
  • Current
Published 2020-03-06 by SAE International in United States
The scope of this report is to capture fundamental principles of selecting a wire size for an aerospace application using the method prescribed in the AS50881 standard and additional calculations, not found in AS50881, to ensure the wire selection will adequately perform in the specific physical and environment conditions. This report covers wire selection and sizing as part of the electrical wire interconnection systems (EWIS) used in aerospace vehicles. Aerospace vehicles include manned and unmanned airplanes, helicopters, lighter-than-air vehicles, missiles, and external pods. This document does not apply to wiring inside of airborne electronic equipment but shall apply to wiring externally attached to such equipment. Wire selection must consider physical and environmental factors to size wires such that they have sufficient mechanical strength, do not exceed allowable voltage drop levels, are protected by materials or circuit protection devices, and meet circuit current carrying requirements. For electrical power feeders and distribution, or EWIS applications, other information and environmental and installation limitations are also needed to adequately evaluate and select the correct wire size for a specific…
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User’s Manual for Certification of Aircraft Electrical/Electronic Systems for the Indirect Effects of Lightning

AE-2 Lightning Committee
  • Aerospace Standard
  • ARP5415B
  • Current
Published 2020-03-05 by SAE International in United States
This ARP provides detailed information, guidance, and methods in support of the Federal Aviation Administration (FAA) Advisory Circular (AC) 20-136. AC 20-136 provides a means, but not the only means, for demonstrating compliance with Title 14 of the Code of Federal Regulations (14 CFR) 23.1306 (Amendment 23-61), 23.2515 (Amendment 23-64), 25.1316, 27.1316, and 29.1316. It is also intended for this ARP to provide the same information, guidance, and methods, to the European Aviation Safety Agency (EASA) certification specifications CS 23.1306 (Amendment 23/4), 23.2515 (Amendment 23/5), 25.1316, 27.1316, and 29.1316, and associated Acceptable Means of Compliance (AMC) 20-136. This ARP provides references relevant to identifying: (1) acceptance criteria for the indirect effects of lightning compliance approaches, (2) verification (analysis and test) methods including those associated with multiple stroke and multiple burst, (3) recommended design options to optimize needed system immunity to lightning indirect effects, and (4) provide guidance in the areas of continued airworthiness of the lightning protection. Equipment hazards due to the indirect effects on equipment mounted on the aircraft exterior, equipment located within the…
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A New Network Design for the “Internet from Space”

Aerospace & Defense Technology: February 2020

  • Magazine Article
  • 20AERP02_06
Published 2020-02-01 by SAE International in United States

Satellites do not yet play a major role in the world's Internet infrastructure; however, this may soon change. Within the next decade, a new generation of satellites could lay the foundations for an “Internet from space,” according to Ankit Singla, a professor at ETH Zurich's Network Design & Architecture Lab. His team is investigating how to improve the performance of large-scale computer networks including the Internet.

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Underwater Telecom Cables Used as Seismic Network

  • Magazine Article
  • TBMG-35981
Published 2020-02-01 by Tech Briefs Media Group in United States

Researchers have turned 20 kilometers of undersea fiber-optic cable into the equivalent of 10,000 seismic stations along the ocean floor. A 3.5 magnitude quake and seismic scattering from underwater fault zones were recorded. The technique, which had previously been tested with fiber-optic cables on land, could provide much-needed data on quakes that occur under the sea, where few seismic stations exist, leaving 70% of Earth's surface without earthquake detectors.

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Terminal Junction System (TJS), Environment Resistant General Specification For

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS81714C
  • Current
Published 2020-01-31 by SAE International in United States
AS81714 covers Terminal Junction System (TJS) components which are used for interconnection of wiring and incorporation of passive components (see 6.1). These environment resistant components have in common the use of crimp type external pin contacts in accordance with AS39029/1 for Series I or crimp type external socket contacts in accordance with AS39029/22 for Series II. This family of TJS components is designed to operate continuously over a temperature range of -65 to 200 °C, using any combination of temperatures generated by the electrical load and ambient temperature so that the maximum internal hot spot, combined temperature, will not exceed the maximum specified for the class of TJS component, unless otherwise specified (1.2, 3.1). The maximum continuous temperature established by the electronic components in a component module (block) shall be limited to the block maximum continuous temperature. The components making up the system and covered by AS81714 include: a Terminal junction bussing blocks (6.12.2) 1 Feedback type (6.12.2.1) 2 Feedthrough type (6.12.2.2) b Racks (mounting holders) for blocks (6.12.3) c Brackets, block mounting (6.12.4) d…
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Splicer, Fusion, Fiber Optic, Aerospace, Explosion-Proof (Type I)

AS-3 Fiber Optics and Applied Photonics Committee
  • Aerospace Standard
  • AS6479/1
  • Current
Published 2020-01-30 by SAE International in United States
This detail specification defines fiber optic fusion splicers acceptable for the installation and repair of a wide range of optical fibers and cables with virtually no insertion loss in hazardous environments (potentially flammable or explosive atmospheres, Type I), particularly aerospace applications. The requirements for acquiring the splicer described herein shall consist of this specification and the latest issue of AS6479.
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Fiber Optic Sensors for Aerospace Applications

AS-3 Fiber Optics and Applied Photonics Committee
  • Aerospace Standard
  • AIR6258
  • Current
Published 2020-01-30 by SAE International in United States
This document is intended to describe technologies available, application needs, and operational requirements relating to the use of fiber optic sensing systems on aerospace platforms: a To define standard terminology used in describing fiber optic sensing systems and their performance. b To identify current interfaces used for fiber optic sensing systems. c To define environmental, reliability, and maintainability capabilities of fiber optic sensing system components. d To describe the fiber optic sensor and instrumentation technologies that forms the current state of the art. e To describe current and future unmet needs of the aerospace industry for measurements using fiber optic sensors.
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Splicer, Fusion, Fiber Optic, Aerospace Non-Explosion-Proof (Type II)

AS-3 Fiber Optics and Applied Photonics Committee
  • Aerospace Standard
  • AS6479/2
  • Current
Published 2020-01-30 by SAE International in United States
This detail specification defines fiber optic fusion splicers acceptable for the installation and repair of a wide range of optical fibers and cables with virtually no insertion loss, particularly in aerospace applications, but not in flammable or explosive atmospheres (Type II). The requirements for acquiring the splicer described herein shall consist of this specification and the latest issue of AS6479.
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