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Airbus A350 software bug forces airlines to turn planes off and on every 149 hours • The Register
"Some models of Airbus A350 airliners still need to be hard rebooted after exactly 149 hours, despite warnings from the EU Aviation Safety Agency (EASA) first issued two years ago."

"Airbus' rival Boeing very publicly suffered from a similar time-related problem with its 787 Dreamliner: back in 2015 a memory overflow bug was discovered that caused the 787's generators to shut themselves down after 248 days of continual power-on operation. A software counter in the generators' firmware, it was found, would overflow after that precise length of time"
TheRegister  aviation  programming  Airbus  Boeing  software 
july 2019 by pierredv
Cellphones a Flight Danger? Could Be on Some Boeing Jets - Bloomberg Jul 2019
Via Blake Reid

"U.S. government officials in 2014 revealed an alarming safety issue: Passenger cellphones and other types of radio signals could pose a crash threat to some models of Boeing 737 and 777 airplanes.

More than 1,300 jets registered in the U.S. were equipped with cockpit screens vulnerable to interference from Wi-Fi, mobile phones and even outside frequencies such as weather radar, according to the Federal Aviation Administration, which gave airlines until November 2019 to replace the units made by Honeywell International Inc.

Today, potentially hundreds of planes worldwide are still flying with the unsafe systems cited in the FAA report. "

Towards end of article, litany of unexplained problems to ASRS
Bloomberg  Boeing  spectrum-vulnerability  Interference  ASRS 
july 2019 by pierredv
KUOW - SPEEA engineer breaks silence on Boeing's MAX 737. Read this letter- Jul 2019
Via John Helm

"A senior member of the union representing Boeing’s engineers says Boeing’s cost-cutting culture is to blame for production problems with the 737 MAX and other planes."

"In an interview with KUOW, Sorscher said Boeing engineers receive clear cultural messages that identifying problems is thought of by management as making trouble."
KUOW  Boeing  culture  business 
july 2019 by pierredv
The State of Airline Safety: Federal Oversight of Commercial Aviation - Hearings - U.S. Senate Committee On Commerce, Science, & Transportation, Mar 2019
"... a hearing titled, “The State of Airline Safety: Federal Oversight of Commercial Aviation,” at 3:00 p.m. on Wednesday, March 27, 2019. In light of the recent tragedy in Ethiopia and the subsequent grounding of the Boeing 737 Max aircraft, this hearing will examine challenges to the state of commercial aviation safety, including any specific concerns highlighted by recent accidents."
hearings  US-Senate  aviation  Boeing 
may 2019 by pierredv
How a 50-year-old design came back to haunt Boeing with its troubled 737 Max jet - Los Angeles Times Mar 2019
"That low-to-the-ground design was a plus in 1968, but it has proved to be a constraint that engineers modernizing the 737 have had to work around ever since. The compromises required to push forward a more fuel-efficient version of the plane — with larger engines and altered aerodynamics — led to the complex flight control software system that is now under investigation in two fatal crashes over the last five months."

"The crisis comes after 50 years of remarkable success in making the 737 a profitable workhorse. Today, the aerospace giant has a massive backlog of more than 4,700 orders for the jetliner and its sales account for nearly a third of Boeing’s profit."

"The crisis comes after 50 years of remarkable success in making the 737 a profitable workhorse. Today, the aerospace giant has a massive backlog of more than 4,700 orders for the jetliner and its sales account for nearly a third of Boeing’s profit. But the decision to continue modernizing the jet, rather than starting at some point with a clean design, resulted in engineering challenges that created unforeseen risks."

"Over the years, the FAA has implemented new and tougher design requirements, but a derivative gets many of the designs grandfathered in, . . ."

"If the results of the investigation do not undermine the fundamental design of the aircraft, then the 737 Max’s future may not be in peril, aviation experts said. It may turn out all that’s needed is a software fix or additional pilot training."
LATimes  aviation  design  Boeing 
march 2019 by pierredv
Boeing constellation stalled, SpaceX constellation progressing - SpaceNews.com
"Boeing is not actively building any satellites for the constellation it proposed to U.S. regulators two years ago, an industry executive said June 25.

“We have a filing but we haven’t really started developing it yet, so I would call that not really moving forward,” Dawn Harms, vice president of global sales and marketing at Boeing Satellite Systems International, said at the CASBAA Satellite Industry Forum here. "

"SpaceX anticipates starting service with around 800 satellites in 2020 or 2021. "
SpaceNews  space  LEO  NGSO  satellite  Boeing  SpaceX 
june 2018 by pierredv
New generation of non-geostationary constellations poses challenges for WRC-19 | PolicyTracker: the spectrum management newsletter
"Article 22.2 of the Radio Regulations, the ITU document that manages international spectrum use, states that geostationary orbit (GSO) satellites cannot receive interference from NGSO satellites in fixed-satellite service (FSS) bands. However, the regulations do not yet include any rules on how this is to be achieved above 30 GHz.

To address this, agenda item 1.6 of WRC-19 considers the regulatory framework for NGSO satellites to use the fixed-satellite service at 37.5–39.5 GHz (space-to-Earth), 47.2–50.2 GHz (Earth-to-space) and 50.4–51.4 GHz (Earth-to-space).

In addition to preventing interference to GSO satellites, the rules also need to find a way for NGSO satellites to avoid interference to each other, to passive earth exploration satellite services at 36-37 GHz and 50.2-50.4 GHz and to radio astronomy services at 42.5-43.5 GHz, 48.94-49.04 GHz and 51.4-54.25 GHz."

"... WP 4A had identified a way to calculate unavailability: the convolution methodology. This is meant to protect GSO satellites without imposing onerous and spectrally inefficient equivalent power flux-density (EPFD) limits on NGSO systems.

It works by calculating the single entry increase in unavailability to a reference GSO link, compared to a maximum stipulated in the Radio Regulations. Administrations then determine the overall increase in link unavailability so that aggregate interference will not degrade the GSO satellites’ availability by more than 10 per cent."

US IWG-3: "Alexander Epshteyn, an engineer at Boeing, drafted a paper for the group’s meeting in late March that proposed solutions to protect GSO networks based on the convolution methodology."
PolicyTracker  NGSO  ITU-R  WRC-19  GSO  EPFD  FSS  interference  *  Boeing 
may 2018 by pierredv
MVDDS 5G Coalition accuses OneWeb of stifling 5G terrestrial uses of the 12 GHz band | FierceWireless
"The MVDDS 5G Coalition is stepping up efforts to get the FCC to make more midband spectrum available for 5G, challenging satellite players that say the 12 GHz band is needed for their ventures.

OneWeb and other members of the Satellite Alliance say they’re all for adequate spectrum for 5G but that it should not be accomplished by reallocating or making secondary any satellite operations in the 12 GHz band.

The rift stems mostly from a petition for rulemaking the MVDDS coalition filed more than 18 months ago urging the FCC to remove regulatory constraints on the 12.2-12.7 GHz band that prevent use of the spectrum for 5G wireless broadband services. The coalition, which includes Dish Network, wants the FCC to enable a two-way mobile broadband service in the 12 GHz band."

"he Satellite Alliance, whose members include OneWeb as well as Boeing, Space Norway and Intelsat, posits that the 12 GHz band is not a suitable candidate for terrestrial wireless broadband use and that satellite operators intensively use the band every day."
FierceWireless  5G  MVDDS  satellite  OneWeb  12GHz  SpaceNorway  Boeing  FCC 
february 2018 by pierredv
Eight Satellite Constellations Promising Internet Service From Space | Aviation Week, Dec 2017
"A number of in-development constellations of satellite telecommunications from low and medium Earth orbit (LEO and MEO) are set to pass milestones in 2018."
AviationWeek  Iridium  Boeing  LeoSat  OneWeb  SpaceX  Samsung  O3b  Telesat 
january 2018 by pierredv
Elon Musk, SpaceX, and NASA: Who Gets to Own Outer Space? - The Ringer
Via Jeff Foust

"Right now, private companies and NASA have a nice, functional, symbiotic capitalist relationship. SpaceX and its competitors build and will soon operate the vehicles, while NASA pays for the service. But with Elon Musk’s eyes tilted toward Mars, that won’t last for long."

“For the rest of the world, they look at the United States and go, ‘Holy crap, look at the U.S. industrial base, which had multiple private space companies pop up out of nowhere,’” Dreier said. “That is a sign of a very healthy aerospace industry and workforce.”
quotations  space  US  commerce  innovation  SpaceX  NASA  Boeing  OrbitalATK  NewSpace 
january 2018 by pierredv
FCC to consider making 1,700 MHz of high-band spectrum available | FierceWireless Oct 2017
"The FCC at its next open meeting will consider an order that would make available a whopping 1,700 MHz of additional high-frequency spectrum for flexible terrestrial wireless use and provide 4 gigahertz for core satellite use. The meeting is scheduled for Thursday, Nov. 16. FCC Chairman Ajit Pai said in a blog post that the decision to make more spectrum available would build on the 11 gigahertz of spectrum that the FCC made available for flexible terrestrial wireless use last year and would be a major marker in the United States' efforts to lead the world in 5G innovation."

"“Unlike terrestrial providers of broadband services, they [satellite companies] object to participating in auctions to secure spectrum rights. But dedicating spectrum for only one type of mobile broadband—satellite mobile broadband—is poor spectrum management,” T-Mobile wrote.

Verizon is also urging the FCC to reject efforts by the satellite industry to dismantle key aspects of the proposed rules, which would have a detrimental impact on 5G deployment. Verizon argued that the Spectrum Frontiers Order provided satellite companies with a “windfall” by creating interference zones around grandfathered and new earth stations under particular conditions.

A group of eight satellite companies, including Boeing, OneWeb and Hughes, submitted a revised proposal (PDF) on Oct. 19 saying they think it addresses concerns raised by terrestrial interests throughout the proceeding and strikes a fair and spectrally efficient balance between the needs of Fixed Satellite Service (FSS) and Upper Microwave Flexible Use Service (UMFUS) operators in the 28 and 39 GHz bands and provides a framework that is suitable for sharing in the 47 GHz and 50 GHz bands."
FierceWireless  satellite  UMFUS  FSS  T-Mobile  Verizon  OneWeb  Hughes  Boeing  47GHz  28GHz  29GHz 
october 2017 by pierredv
Intelsat General Corp. President On Epic’s Military Uses | World Satellite Business Week content from Aviation Week
"The launch of the fifth in the Epic constellation of Boeing-made satellites, designed for maximum flexibility with the ability to interconnect between three different bands, will also be able to transmit full-motion video from small UAVs used by militaries"

"Butler explains that Epic, a Boeing 702MP satellite, can connect spot beams to other spot beams rather than connecting through a gateway. “You can just pick two beams anywhere on the footprint of the satellite and say, ‘I want to go from here to here,’” Butler notes. "

"Ultimately, that means users such as the U.S. military can offer more services with the same amount of capacity as in a traditional wide-beam architecture. In addition, these high-throughput satellites are able to reduce the threat of jamming. "
AviationWeek  Intelsat  Boeing  UAS  UAV  surveillance 
september 2017 by pierredv
Satellite constellations could be poised to challenge the broadband industry - LA Times, Dec 2016
"Now, a new generation of satellite entrepreneurs is headed back to the launch pad. Backed by billions of dollars from deep-pocketed investors, they plan to blanket the earth in the next few years with perhaps thousands of miniature satellites beaming cheap, ubiquitous broadband service. What’s different? Launching one of these smaller satellites can cost a fraction of the price for a larger, school-bus-sized satellite. These new satellites will largely be mass-produced. And consumers now demand high-speed Internet connectivity pretty much everywhere, on airplanes, cruise ships and in the remotest village in Africa. "

"By 2022, OneWeb says it will connect every unconnected school to the Internet. Eventually, OneWeb plans a 700-satellite constellation. OneWeb’s satellite manufacturing facility in Exploration Park, Fla. is key to these plans."

"Hawthorne-based SpaceX plans to eventually launch more than 4,000 satellites for its network. Each satellite would be about 13 feet long and 6 feet wide, with 19-foot-long solar arrays."
satellite  broadband  LATimes  NewSapce  OneWeb  SpaceX  Boeing 
september 2017 by pierredv
Boeing Taps ArianeGroup For Next-Gen Satellite Propulsion | World Satellite Business Week content from Aviation Week
"Boeing and ArianeGroup will jointly develop a new generation of electric thrusters to increase a satellite’s payload and reduce the time necessary for orbit-raising. ArianeGroup’s Orbital Propulsion department, based in Lampoldshausen, Germany, is developing a dual-mode, radio-frequency ion thruster (RIT 2X) ..."

"The radio-frequency ion thruster uses a high-frequency electromagnetic field, as opposed to an anode and a cathode, to ionize xenon gas atoms."

"Thus far, Boeing has used more conventional xenon-ion propulsion, which is lightweight but can take seven months to raise the orbit of a geostationary telecommunications satellite."
Boeing  satellite  ArianeGroup  GSO  AviationWeek 
september 2017 by pierredv
From Boeing to SpaceX: 11 companies looking to shake up the satellite space | FierceWireless
"Companies filed with the FCC last year to launch 8,731 non-geostationary orbit (NGSO) communications satellites, according to Parabolic Arc. Not all of them are proposing to connect the unconnected to the internet; some are geared toward IoT and others are looking at serving the space industry. Performance is expected to be far better than previous satellite generations, with fiberlike speeds and lower latency."
FierceWireless  satellite  NGSO  FCC  OneWeb  SpaceX  ViaSat  SpaceNorway  LeoSat  Karousel  Audacy  Theia  Boeing  O3b  Ku-band  Ka-band  V-band  Kepler  Telesat  * 
august 2017 by pierredv
Boeing's LEO constellation hinges on V-band's viability - SpaceNews.com
"Since filing its license last summer with the U.S. Federal Communications Commission for a constellation of broadband communications satellites, Boeing has focused on developing some of the project’s key technologies, Bruce Chesley, vice president and program manager for Boeing’s Global Broadband Systems, told reporters at a March 7 press briefing."

"Boeing plans to draw on its commercial and military satellite experience to mitigate the rain attenuation that can degrade V-band transmissions. "
Boeing  NGSO  satellite  V-band  SpaceNews 
june 2017 by pierredv
FCC gets five new applications for non-geostationary satellite constellations - SpaceNews.com March 2017
Boeing: “1,396 to 2,956 low-Earth orbit (LEO) satellites for providing connectivity”

SpaceX: VLEO, “V-band low-Earth orbit (LEO) constellation of 7,518 satellites to follow the operator’s initially proposed 4,425 satellites that would function in Ka- and Ku-band”

Telesat: “V-band LEO constellation as one that “will follow closely the design of the Ka-band LEO Constellation,” also using 117 satellites (not counting spares) as a second-generation overlay.”

Theia: “use V-band frequencies for gateways on the ground that would have originally only used Ka-band. The company wants to operate a constellation of satellites for both communications and remote sensing, and claims that because its spacecraft will have “regenerative” payloads, that “there is no specific relationship between V-band uplink frequency bands and downlink frequency bands.””

OneWeb: “operate a “sub-constellation” of 720 LEO V-band satellites at 1,200 kilometers, and another constellation in Medium Earth Orbit (MEO) of 1,280 satellites. Added together, that expands the OneWeb constellation by 2,000 satellites”

O3b: “up to 24 additional satellites that would operate in a circular equatorial orbit as a constellation called O3bN”
FCC  satellite  NGSO  v-band  Boeing  SpaceX  Telesat  Theia  O3b  OneWeb  SpaceNews 
june 2017 by pierredv
Boeing proposes big satellite constellations in V- and C-bands - SpaceNews.com June 2016
"Boeing wants U.S. and international regulators to relax constraints on low-orbiting satellite broadband constellations using C- and V-band and has specifically asked for a license to launch and operate a network of 1,396-2,956 V-band satellites."

"Boeing proposes a constellation of between 1,396 and 2,956 V-band satellites in 35-74 orbital planes at 1,200 km in altitude. Each satellite's footprint would be subdivided into thousands of 8-11-km-diameter cells, with each cell using up to 5 GHz of bandwidth. Boeing also wants regulators to clear the way for a mega-constellation in C-band, athough Boeing is not planning its own C-band constellation."

"The company outlines its network’s features for orbital debris mitigation, both in terms of how the satellites would be designed to withstand debris impact and how they would be removed from orbit on retirement."

"Allison’s principal argument is that current power limits on C- and V-band satellite networks were set more than a decade ago, when a proposed highly elliptical orbit constellation was in planning. The network was never built, but the regulations remained in force. Boeing’s proposed V-band network, like its C-band proposal, is for constellations in circular orbit, which the company says poses less of a threat to satellites broadcasting the same frequencies from geostationary orbit over the equator than would a highly elliptical orbit."

"As is true of most satellite broadband systems being designed, Boeing’s C- and V-band networks would feature intense reuse of the broadcast frequencies. For the V-band network, the company says each satellite’s beams would be subdivided into thousands of cells, each 8-11 kilometers in diameter and each carrying up to five 1-gigahertz channels."

"The company is asking the FCC to modify eight of its rules to permit the system’s development. For example, the FCC’s equivalent power flux density limits are stricter than the ITU’s; Boeing asks that the U.S. regulator raise its limits."
Boeing  satellite  NGSO  SpaceNews  V-band 
june 2017 by pierredv
FCC IB - Boeing petition - search results
The Boeing Company (Boeing) has filed an application with the Commission to launch and
operate a non-geostationary-satellite orbit (NGSO) satellite system providing fixed-satellite service (FSS).

The Boeing Company, Application for Authority to Launch and Operate a Non-Geostationary Low Earth Orbit
Satellite System in the Fixed Satellite Service. IBFS File No. SAT-LOA-20160622-00058 (filed June 22, 2016)
(Boeing Application). To access the Boeing Application, visit http://licensing.fcc.gov/myibfs.
FCC  IB  filings  satellite  Boeing 
april 2017 by pierredv
CCA, CTIA urge FCC to deny Boeing’s request for satellite system | FierceWireless
"Both CTIA and the Competitive Carriers Association (CCA) are coming out against Boeing’s proposal to operate a non-geostationary satellite orbit (NGSO) system in the 37.5-42, 47.2-50.2 and 50.4-51.4 GHz bands, saying it threatens spectrum for terrestrial 5G operators."
FierceWireless  Boeing  CCA  CTIA  FCC  satellite  cellular  mmWave 
december 2016 by pierredv
Boeing seeks permission to launch satellite constellation in same V-band spectrum as 5G systems - FierceWirelessTech
"Boeing last week filed an application with the FCC to launch and operate a geo-stationary satellite orbit (NGSO) fixed satellite service (FSS) system operating in low Earth orbit (LEO) in the 37.5-42.5 GHz, 47.2-50.2 and 50.4-52.4 GHz bands, collectively known as the V-Band. In so doing, it's putting its hat into the same ring as companies like SpaceX and OneWeb."
"Boeing's application said its NGSO system would consist of a total constellation of 2,956 NGSO FSS satellite to provide very high speed, low latency internet connectivity for user terminals via the system's network access gateways and associated terrestrial fiber network. "
Boeing  V-band  SpaceX  OneWeb  NGSO  FSS  FierceWireless 
june 2016 by pierredv
Are Boeing's Battery Difficulties Part of a Much Bigger Problem? - IEEE Spectrum
"Seventy percent of the Dreamliner is preassembled by a tiered system of subcontractors that Boeing has never used before" Interview by Steven Cherry of Christopher Tang, author with Joshua Zimmerman of a rather prescient 2009 business journal article entitled “Managing New Product Development and Supply Chain Risks: The Boeing 787 Case.”
Boeing  manufacturing  aviation  unintended-consequences  IEEE-Spectrum 
march 2013 by pierredv
Boeing and Airbus argue about subsidies: Trading blows | The Economist
"Boeing puts the combined value of all the subsidies Airbus has received at $205 billion."
"Europe puts Boeing’s subsidy haul at only $24 billion over the past two decades and up to 2024, but says that using America’s methodology, the figure would be nearer to $305 billion."
subsidies  trade  boeing  airbus  TheEconomist 
september 2009 by pierredv

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