Browse Topic: Satellite communications

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Enhancing Rotorcraft Safety: Zero-Shot Visual Language Model for Obstacle Detection around Helipads from Satellite ImageryF-0081-2025-02895/20/2025
Rotorcraft continue to experience higher fatal accident rates compared to fixed-wing aircraft, primarily due to low altitude flight operations and reduced situational awareness in complex environments. A critical factor is the limited availability of accurate, up-to-date information on helipads and surrounding obstacles - such as trees, poles, and buildings - that pose significant risks during takeoff and landing. Existing resources, including the Federal Aviation Administration's heliport registry, are often outdated and incomplete, particularly for private or state-operated sites, and fail to report nearby obstacles. This lack of up-to-date data is largely due to privacy restrictions at certain locations and the high cost associated with comprehensive obstacle surveys. To address this challenge, we develop a deep learning (DL) framework that automatically detects helipads and nearby obstacles from high-resolution satellite imagery. Our approach combines Mask R-CNN for precise pixel
Khelifi, Amine, Carannante, Giuseppina, Bouaynaya, Nidhal, Johnson, Charles
Army Completes Satellite as a Managed Service Research ProjectTBMG-5213312/1/2024
Intelsat McLean, VA melissa.longo@intelsat.com
SAE TOMORROW TODAY: Michigan: The New Epicenter of Aerospace133802/9/2023
As the birthplace of the automotive industry and the home of several aviation firsts, Michigan offers unique advantages to the rapidly expanding space economy. To make the most of this opportunity, the Michigan Aerospace Manufacturers Association (MAMA) has convened three public-private partnerships: the Michigan Launch Initiative, Space-Enabled Communications for Advanced Mobility, and the Mid-America Hypersonic Suborbital Test Range. These programs provide a collaborative platform for public-private partners to support satellite launch capabilities, test commercial and national security applications, and expand 5G connectivity, among other opportunities. We sat down with Gavin P. Brown, Executive Director, MAMA, to discuss these exciting initiatives and learn how the organization is positioning Michigan as a leader in all phases of aerospace manufacturing -- from tool and die all the way through final assembly --by leaning on the state's rich automotive and aviation history.
Hineman, Marcie
Ku/Ka Band Satellite (KSAT) SubcommitteeWC-006199/23/2022
The AEEC KSAT Subcommittee develops Standards that define Ku-band and Ka-band satellite communication (satcom) systems that meet operators’ highperformance requirements. The equipment specified are typically used to provide passenger data, video, and voice communication services.
Airlines Electronic Engineering Committee
NASA Goddard Space Communications Workshop PreviewTBMG-464118/18/2022
Since the first satellite launched over six decades ago, spacecraft have relied on radio waves to communicate with Earth. But radio has its limitations. With more and more satellites now in space and entry of commercial players as well as the growing demand for space services, the field of space communications is primed for disruption.
Design for Internet of Things in Aerospace2022-26-12525/26/2022
Internet of Things (IoT) is being adopted in aerospace industry, be it a ground based or airborne systems, the scope of IoT is enormous and advantages are limitless, which are not limited to reduced weight, reduced power consumption and reduced operational cost and time. Some of the use cases are to have an IoT based edge computing nodes (ECN) to transfer digitized data from sensors to the centralized computing system and RFID based baggage and cargo tracking system. This paper focuses on critical design requirements for IoT devices in aircraft, opportunity to harvest energy for the IoT devises from Aircraft thermal dissipation and vibration, cybersecurity threats and encryption solutions, power optimization for extended battery life in the devices, existing technology advancements and DO guidance to deploy IoT solutions in aerospace. This synopsis contains the introduction to the below topics, the final paper will have the details, example design and analysis results. Power
Muthulingam, Venkatesan
Communicating Via Long-Distance LasersTBMG-398609/1/2021
Visible light has been used to communicate for centuries. Lanterns on ships and Morse code flashes allowed information to be conveyed at a distance. But now there’s a better way to use light to communicate over even further distances and with far more accuracy: lasers.
Innovative IoT Sensor Applications Pave the Way to the FutureTBMG-392446/1/2021
If you tell people that exterminators use temperature sensors to eliminate bedbugs, it prompts questions, and people want to know more. You can get the same reaction when you mention that landfill, entomology labs, and banana-ripening managers use sensor data to automate and optimize their operations.
Honeywell Aspire-Series Satellite Communication System Validation on the NRC Bell 412 Advanced System Research AircraftF-0077-2021-168765/10/2021
ABSTRACT
Tolonen, Erik, Alexander, Marc
Intelligent Helipad Detection from Satellite ImageryF-0077-2021-168565/10/2021
ABSTRACT
Johnson, Charles, Specht, David, Bouaynaya,  Nidhal, Rasool,  Ghulam
Four RF Technology Trends You Need to Know for Satellite Communication Device Design20AERP10_0510/1/2020
Over the past four decades, the sheer amount and complexity of information transmitted through satellite communication (satcom) has substantially increased. At the same time, more mission-critical applications - such as aeronautical, maritime, and military navigation - have become increasingly reliant on these communications. As a result, the RF circuit building blocks that make up satcom technology have been through many changes to accommodate the latest advancements in the industry including miniaturization, increased reliability, and the ability to rapidly transmit even more complex data. This article examines four RF technology trends today that are helping satcom design engineers meet the data demands of their military and aerospace clients while also making RF components that are lighter by size, weight, and power and more cost-effective to produce (SWaP-C).
Four RF Technology Trends You Need to Know for Satellite Communication Device DesignTBMG-3788610/1/2020
Over the past four decades, the sheer amount and complexity of information transmitted through satellite communication (satcom) has substantially increased. At the same time, more mission-critical applications — such as aeronautical, maritime, and military navigation — have become increasingly reliant on these communications. As a result, the RF circuit building blocks that make up satcom technology have been through many changes to accommodate the latest advancements in the industry including miniaturization, increased reliability, and the ability to rapidly transmit even more complex data.
Photonic Microwave Generation Using On-Chip Optical Frequency CombsTBMG-371917/1/2020
In our information society, the synthesis, distribution, and processing of radio and microwave signals are ubiquitous in wireless networks, telecommunications, and radars. The current tendency is to use carriers in higher frequency bands, especially with looming bandwidth bottlenecks due to demands for, e.g., 5G and the Internet of Things (IoT). Microwave photonics, a combination of microwave engineering and optoelectronics, might offer a solution.
MEDIA INDEPENDENT SECURE OFFBOARD NETWORKARINC848 (Current)6/19/2020
ARINC Specification 848 is a functional standard based on a protocol specification profile for a secured network interface. The purpose is to define a common method of initiating a mutually authenticated tunnel between an aircraft service and its Enterprise service. ARINC Specification 848 defines a standard implementation for securing the communications between an onboard Local Area Network (LAN) and an Enterprise LAN on the ground. Various aircraft network architectures and various air to ground communication channels (aka media) are accommodated in this document. For example, L-band Satellite Communication (Satcom), Ku/Ka-band Satcom, Gatelink Cellular, and Gatelink are considered.
Airlines Electronic Engineering Committee
Autonomic and Apoptotic Highly Distributed SystemTBMG-368395/1/2020
NASA Goddard Space Flight Center has developed software that mimics the biological mechanisms of autonomic systems and apoptotic systems (the process that shuts down cells when they no longer serve a purpose). The software provides self-management and security for a distributed system such as a satellite swarm in which craft communicate and collaborate. Originally developed for space missions, this capability has now been extended for use in terrestrial applications involving cloud and grid-based systems and other applications requiring highly distributed operation.
Effect of Space Weather on Autonomous Vehicle Navigation2020-01-01404/14/2020
Autonomous vehicle systems integrate multiple information systems. Navigation is reliant on Global navigation satellite systems (GNSS) such as the global positioning systems (GPS) which are supported by a satellite network. However, satellites and radio signals are subject to interference from sunspots. Sunspots happen on regular cycles at varying strengths but their occurrence can’t be exactly predicted. The likelihood of a severe solar event is roughly twelve percent per decade; consequently, solar events are likely to impair navigation. Results will show the probability of each event and its impact on autonomous vehicle navigation. In the worst case scenario, satellites could even be permanently damaged by severe sunspots. As autonomous vehicles become a more significant portion of the economy, it is necessary that they have resilience to operate in extreme conditions. Alternative navigation procedures are proposed to enhance the resiliency of autonomous vehicles. Artificial
Hoback, Alan
Multifunctional Structure Stabilizes and Rotates SatellitesTBMG-363624/1/2020
Many satellites are in space to take photos. But a vibrating satellite, like a camera in shaky hands, can’t get a sharp image. Pointing it at a precise location to take a photo or perform another task is an important function that requires accuracy. Researchers have developed a way to cancel out the vibrations of a satellite by vibrating the solar panels in the opposite direction — called active noise cancellation.
Using Sound and Light for Ultrafast Data TransferTBMG-364014/1/2020
Researchers have developed a method to control terahertz quantum cascade lasers, which could lead to the transmission of data at the rate of 100 gigabits per second. That ultrafast data transfer would be about 1,000 times quicker than a fast Ethernet operating at 100 megabits a second.
Battle Tank Protection Systems Outfit Four Brigades of Army TanksTBMG-366084/1/2020
RAFAEL Advanced Defense Systems Ltd. Haifa, Israel +972 73 335 4444
Atoms Can Receive Common Communications SignalsTBMG-359862/1/2020
A new type of sensor was developed that uses atoms to receive commonly used communications signals. Cesium atoms were used to receive digital bits (1s and 0s) in the most common communications format used in cellphones, Wi-Fi, and satellite TV. In this format, called phase shifting or phase modulation, radio signals or other electromagnetic waves are shifted relative to one another over time. The information (or data) is encoded in this modulation. The method works across a wide range of frequencies.
A New Network Design for the “Internet from Space”20AERP02_062/1/2020
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. Exploiting advances in cost-cutting technologies in the space sector, the new satellite systems would use thousands of satellites instead of the tens of satellites used in past systems. These satellites could then be linked to each other via laser light to form a network. The coverage provided by these satellites would reach remote regions that currently have no or very limited access to the Internet, since they are not connected or are only poorly connected to the intercontinental fiber optic cables that power today's Internet.
A New Network Design for the “Internet from Space”TBMG-360662/1/2020
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.
SECOND GENERATION AVIATION SATELLITE COMMUNICATION SYSTEMS, AIRCRAFT INSTALLATION PROVISIONSARINC761-6 (Current)12/23/2019
This ARINC Standard defines the installation characteristics of second generation L-band satellite communication systems. It provides the traditional form, fit, function, and interfaces for the installation of satcom equipment for use in all types of aircraft. Description of avionics equipment (e.g., Satellite Data Unit (SDU), Antennas, etc.) are included. Supplement 6 adds references to new Diplexer/Low Noise Amplifiers (DLNAs) defined in Supplement 8 to ARINC Characteristic 781: Mark 3 Aviation Satellite Communication Systems. The five new DLNAs are intended to protect Inmarsat Classic Aero and SwiftBroadband (SBB) satcom equipment from ground-based cellular sources, such as cellular Long Term Evolution (LTE) and Ancillary Terrestrial Component (ATCt). The DLNAs are categorized by desired features and service (e.g., new DLNA versus drop-in replacement, LTE and/or ATCt protection, Classic Aero and/or SBB service).
Airlines Electronic Engineering Committee
AVIATION SATELLITE COMMUNICATION SYSTEMS PART 1 AIRCRAFT INSTALLATION PROVISIONSARINC741P1-15 (Current)12/23/2019
This ARINC Standard defines the installation characteristics of first generation L-band satellite communication systems. It provides the traditional form, fit, function, and interfaces for the installation of satcom equipment for use in all types of aircraft. Description of avionics equipment (e.g., Satellite Data Unit (SDU), Antennas, etc.) are included. Supplement 15 adds references to new Diplexer/Low Noise Amplifiers (DLNAs) defined in Supplement 8 to ARINC Characteristic 781: Mark 3 Aviation Satellite Communication Systems. The five new DLNAs are intended to protect Inmarsat Classic Aero and SwiftBroadband (SBB) satcom equipment from ground-based cellular sources, such as cellular Long Term Evolution (LTE) and Ancillary Terrestrial Component (ATCt). The DLNAs are categorized by desired features and service (e.g., new DLNA versus drop-in replacement, LTE and/or ATCt protection, Classic Aero and/or SBB service).
Airlines Electronic Engineering Committee
De-Orbit Device for SmallSatsTBMG-3570212/1/2019
To decrease de-orbit time and allow for higher-altitude orbits of small satellites, researchers at NASA and the University of Florida have developed a retractable drag device capable of modulating drag area while providing 3-axis stabilization. The device increases area without increasing mass, increasing the ability to control rotation and attitude in 12U, 15-kg CubeSats and other small satellites.
COMMUNICATIONS MANAGEMENT UNIT (CMU) MARK 2ARINC758-4 (Current)11/26/2019
This ARINC Standard specifies the ARINC 758 Mark 2 Communications Management Unit (CMU) as an on-board message router capable of managing various datalink networks and services available to the aircraft. Supplement 4 adds Ethernet interfaces, per ARINC Specification 664 Part 2. This will allow the CMU to communicate with IP based radio transceivers (e.g., L-Band Satellite Communication Systems (Inmarsat SwiftBroadband (SBB) and Iridium Certus), ACARS over IP, AeroMACS, etc.).
Airlines Electronic Engineering Committee
MARK I AVIATION KU-BAND AND KA-BAND SATELLITE COMMUNICATION SYSTEM PART 1 PHYSICAL INSTALLATION AND AIRCRAFT INTERFACESARINC791P1-3 (Current)9/19/2019
This standard sets forth the desired characteristics of Aviation Ku-band Satellite Communication (Satcom) and Ka-band Satcom Systems intended for installation in all types of commercial air transport aircraft. The intent of this characteristic is to provide guidance on the interfaces, form, fit, and function of the systems. This document also describes the desired operational capability of the equipment needed to provide a broadband transport link that can be used for data, video, and voice communications typically used for passenger communications and/or entertainment. The systems described in this characteristic are not qualified, at this writing, for aviation safety functions.
Airlines Electronic Engineering Committee
Collins Aerospace provides avionics for C-130H modernization programSAE-MA-000029/3/2019
The Lockheed C-130H Hercules fleet operated by the Air National Guard and U.S. Air Force Reserve is getting new Collins Aerospace Systems avionics that will help extend the life of the legacy aircraft by 20 years.
Kucinski, William
NASA Eyes GPS at the Moon for Artemis MissionsTBMG-351119/1/2019
The Global Positioning System (GPS), a satellite-based navigation system used by an estimated four billion people worldwide to figure out where they are on Earth at any moment, could be used to pilot in and around lunar orbit during future Artemis missions to the Moon.
WHAT WE'RE DRIVING19AUTP09_089/1/2019
As the sporting player in Volvo's C-segment sedan lineup, this all-wheel drive, turbocharged-and-supercharged R-Design S60 faces benchmark competition in the BMW 3-Series, Audi A4 and Mercedes-Benz C-Class. In pure performance, the stylish Swede stacks up nicely against the Germans: Its 316 hp (236 kW) pushes the 3,900 lb (1769 kg) car plus my 200-lb (91 kg) of dead weight from a standstill to 60 mph (97 km/h) in 5.5 s, according to my stopwatch. Dynamically, the S60 T6 (not my choice of nomenclature, as it's a 4-cyl., not a six) feels solid and secure, if not exceptionally nimble, when pushed hard in the corners. But where the S60 R-Design clearly beats the others is inside, the area where Volvo shows its taillamps to the other premium brands. The S60's cabin is a beautifully integrated blend of rich materials and tasteful accents - brushed aluminum of the lower IP contrasting with deep ebony, offset by delightful-to-touch control knobs. The front seats are both handsome and
Laser-Pointing System Transmits Data from Tiny SatellitesTBMG-351549/1/2019
Since 1998, almost 2,000 shoebox-sized satellites known as CubeSats have been launched into space. Due to their small frame and the fact that they can be made from off-the-shelf parts, CubeSats are significantly more affordable to build and launch than traditional satellites that cost hundreds of millions of dollars.
Tactical Communications SystemTBMG-348738/1/2019
Spectra Group Tysons, VA 202-818-8429
A New Approach to Satellite CommunicationsTBMG-341274/1/2019
In the Heinrich Hertz satellite mission, which will be launched in 2020, the DLR Space Administration (German Aerospace Center) plans to develop and operate a German communications satellite. The chief objective of the mission is the scientific validation and testing of payload technologies in space.
Signal Combiner for Wideband CommunicationTBMG-341684/1/2019
NASA’s Glenn Research Center has devised an efficient new method of combining primary and secondary signals with minimal loss and noise. With its ability to reduce system noise, this novel signal combiner delivers the best opportunity to receive a desired signal not easily distinguished from background noise.
Aerospace & Defense Technology: April 201919AERP044/1/2019
An Integrated Framework for Complex Radar System Design Thermoplastic Composites to Play Enhanced Role in Next-Generation Aerospace Applications Using Ruggedized Test Equipment to Solve Jet Engine Problems How FMC Developments Support Legacy and Next-Gen Data Needs XPONENTIAL 2019 - An AUVSI Experience Understanding the 'Black Art' of RF and Microwave Switching A New Approach to Satellite Communications Modular Biosensor Patch Identifying new biomarkers to help monitor cognition and stress in the human body could enhance human performance. Characterization of Bore Temperatures and Stresses in Small Caliber Gun Barrels Data gathered from physical testing will be compared to analytical methods used to assess barrel wall temperature profiles and barrel wall stress and strain. Simulation of Active Imaging Systems Better data could lead to systems that improve tactical target acquisition, particularly under adverse environmental conditions. Deep Installation Method for Three-Component
The Teletenna — a Hybrid Telescope Antenna SystemTBMG-341784/1/2019
Innovators at NASA’s Glenn Research Center have developed a hybrid telescope antenna system — Teletenna — to deliver high-data-rate communication over great distances. Teletenna has the potential to benefit deep space missions and communications on Earth. By combining two very different communications systems — optics and radio frequency (RF) — Teletenna capitalizes on the benefits of each system while overcoming conflicting engineering requirements.
Self-Stabilizing, Distributed, Symmetric, Fault-Tolerant SynchronizationTBMG-339233/1/2019
Distributed systems have become an integral part of safety-critical computing applications, necessitating system designs that incorporate complex fault-tolerant resource management functions to provide globally coordinated operations with ultra-reliability. As a result, robust clock synchronization has become a required fundamental component of fault-tolerant, safety-critical distributed systems. Since physical oscillators are inherently imperfect, local clocks of nodes of a distributed system, driven by these oscillators, do not keep perfect time and can drift with respect to real time and one another. Thus, the local clocks of the nodes must periodically be re-synchronized. As a result, a fault-tolerant system needs a clock synchronization algorithm that tolerates imprecise local clocks and faulty behavior by some processes.
Text Tech: Navy Vessels Use Shipboard Signal Lamps for Text MessagingTBMG-338933/1/2019
Sponsored by the Office of Naval Research's (ONR) TechSolutions program, the Flashing Light to Text Converter (FLTC) features a camera that can be mounted atop a signal lamp to receive Morse code bursts from another lamp within view. A hand-held device or laptop computer is connected to this camera to display text messages sent and received.
Steering-Mirror-Assisted Laser Fine PointingTBMG-336972/1/2019
Pointing precision is a critical element of instrumentation for optical communications and ranging in space, affecting laser design, link power budgets, and SWaP. While star trackers possess pointing knowledge that is sub-microradian, conventional pointing accuracy is limited by reaction-wheel-based altitude control systems at ~50 microradians.
Challenges in Ultra-Wide Band Worldwide Radio Homologation2019-26-01601/9/2019
Ultra-Wide Band has found increasing use case in Indoor and Outdoor location tracking systems. An interesting application of UWB lies in preventing vehicle thefts that use relay attacks on conventional passive entry passive start electronic systems. Due to very large bandwidth ranging from 3 GHz to 10 GHz in case of UWB, the worldwide radio homologation authorities are challenged to come out with appropriate test and approval processes to limit the growing interference and ensure unified and compatible systems throughout the globe. Having worked on global RF regulatory approval processes for over five years in Short Range Devices (SRD) namely for Car Access and Passive Entry (CAPE) products, the authors have gained important insights about the peculiar needs of the industry, regulatory bodies and test laboratories. The paper discusses challenges faced by the authors while working with global and national regulatory agencies of multiple countries in terms of available standard, test
Gambhir, Ameya, Ethape, Srushti, Rebello, Agnetta
SECOND-GENERATION KU-BAND AND KA-BAND SATELLITE COMMUNICATION SYSTEMARINC792 (Current)12/19/2018
This standard sets forth the desired characteristics of a second-generation aviation Ku-band and Ka-band satellite communication (satcom) system intended for installation in all types of aircraft.
Airlines Electronic Engineering Committee
LOW-EARTH ORBITING AVIATION SATELLITE COMMUNICATION SYSTEMSARINC771-1 (Current)10/1/2018
This document sets forth the desired characteristics of the Iridium Low-Earth Orbiting (LEO) Aviation Satellite Communication (Satcom) System avionics intended for installation in all types of aircraft including commercial transport, business, and general aviation aircraft. The intent of this document is to provide a description of the system components, aircraft interfaces, and satellite communication functions. It also describes the desired system performance and operational capability of the equipment.
Airlines Electronic Engineering Committee
Space Debris Orbit and Attitude Prediction for Enhanced and Efficient Space Situational AwarenessTBMG-3302510/1/2018
This research deals with the problem of modelling the orbit and attitude motion of uncontrolled manmade objects in orbit about the Earth, which tumble due to the natural influences of the near-Earth space environment. A mathematical, physics-based and computational approach is taken to model the forces and torques that drive the orbit and attitude evolution of such objects. The main influence modelled is solar radiation pressure (SRP), which is the interaction of solar electromagnetic radiation with the surface of an object, leading to both forces and torques that influence the orbital and attitude motion. Other influences, such as the gravitational field of the Earth, are also modelled.
Enhanced SATCOMs for Unmanned Aerial SystemsTBMG-329049/1/2018
Satellites launched with the purpose of relaying communications have been enabling around-the-globe transmissions of information for half a century. And in this current era of hybrid warfare, that means this decades-old hardware needs to be able to manage the command and control of unmanned aircraft.
Location Awareness Algorithm for Internet of Things DevicesTBMG-325198/1/2018
Positioning of wireless devices is centralized, depending on “anchors” with known locations such as cell towers or GPS satellites to communicate directly with each device. As the number of devices increases, anchors must be installed at higher density. Centralized positioning can become unwieldy as the number of items to track grows significantly.
Secure Optical Quantum CommunicationsTBMG-287304/1/2018
NASA’s Glenn Research Center has developed a method of using entangled-photon pairs to produce highly secure mobile communications that require mere milliwatts of power. Conventional gas Argon-ion laser sources are too large, expensive, and power-intensive to use in portable applications. By contrast, Glenn’s patented optical quantum communication method produces entangled-photon pairs approximately a million times more efficiently than conventional sources, in a system that is small and light enough to be portable. Furthermore, because this method transmits digital information by detecting small temporal shifts between entangled photons, its superior signal-to-noise ratio facilitates highly secure communications in very noisy free space and fiber-optic environments. Originally developed for micro-robots used for deep space exploration, this technology represents a breakthrough for a wide variety of terrestrial, scientific, military, and other field-deployable applications including
Cup Cylindrical Waveguide AntennaTBMG-287084/1/2018
NASA Glenn’s cup cylindrical waveguide antenna (CCWA) is a short backfire microwave antenna capable of simultaneously supporting the transmission or reception of two distinct signals having opposite circular polarizations. Short backfire antennas are widely used in mobile satellite communications, tracking, telemetry, and wireless local area networks because of their compactness and excellent radiation characteristics.
Method and Associated Apparatus for Capturing, Servicing, and De-Orbiting Earth Satellites Using RoboticsTBMG-287274/1/2018
Engineers at Goddard Space Flight Center have overcome limitations plaguing the satellite sector since its inception through the development of a robotic system allowing for the autonomous capture and servicing of in-orbit satellites. By enabling spacecraft to identify, pursue, and attach to a target satellite, this innovation will make possible satellite inspection, repairing, refueling, and upgrading. The major benefits provided by this technology will be of great interest to the commercial satellite sector.
MARK 3 AVIATION SATELLITE COMMUNICATION SYSTEMSARINC781-7 (Current)8/9/2017
This document sets forth the desired characteristics of an aviation satellite communication (Satcom) system intended for installation in all types of commercial transport and business aircraft. The intent of this document is to provide general and specific guidance on the form factor and pin assignments for the installation of the avionics primarily for airline use. It also describes the desired operational capability of the equipment to provide data and voice communications, as well as additional standards necessary to ensure interchangeability. This Characteristic specifies equipment using Inmarsat satellites operating in L-band. Ku-band and Ka-band equipment is specified in ARINC Characteristic 791.
Airlines Electronic Engineering Committee
Digital Beamforming InterferometryTBMG-270246/1/2017
NASA Goddard Space Flight Center has developed a new radar approach that uses a single phased array antenna and a single-pass configuration to generate interferograms, known as Digital Beamforming Interferometry. A digital beamforming radar system allows the implementation of nonconventional radar techniques, known as Digital Beamforming Synthetic Aperture Radar Multimode Operation (DBSAR).
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