Publicerad den Lämna en kommentar

ION GNSS+ 2023: ANELLO Photonics

About the Author: Matteo Luccio

Matteo Luccio, GPS World’s Editor-in-Chief, possesses more than 20 years of experience as a writer and editor for GNSS and geospatial technology magazines. He began his career in the industry in 2000, serving as managing editor of GPS World and Galileo’s World, then as editor of Earth Observation Magazine and GIS Monitor. His technical articles have been published in more than 20 professional magazines, including Professional Surveyor Magazine, Apogeo Spatial and xyHt. Luccio holds a master’s degree in political science from MIT. He can be reached at mluccio@northcoastmedia.net or 541-543-0525.

Publicerad den Lämna en kommentar

ESSP certified as pan-European Iris communication services provider

Photo: iStock.com/NicoElNino

Image: iStock.com/NicoElNino

The European Union Aviation Safety Agency (EASA) has certified Madrid-based European Satellite Services Provider (EESP) as a pan-European communication services provider for Iris data link services.

Iris, a project supported by the European Space Agency (ESA) and various European partners, aims to develop a satellite-based air-ground communication system to enhance air traffic management. By 2028, Iris will enable full 4D trajectory management of airspaces globally, making it a crucial means of communication between cockpit crews and controllers.

The certification of ESSP as an Iris data link services provider comes after more than a year of testing and audits at both ESSP and Inmarsat premises. The certification establishing compliance with relevant regulations and associated industrial standards for data link services.

Additionally, ESSP recently signed a long-term contract with Viasat/Inmarsat to act as the Service Provider for Iris data link services, powered by Viasat’s SwiftBroadband Safety (SB-S) connectivity. As The European Geostationary Navigation Overlay Service (EGNOS) service provider, ESSP is already under a long-term contract with the European Agency for the Space Program (EUSPA), where it carries out EGNOS operations and maintenance.

Iris is scheduled to be fully operational in Europe by 2024, providing services to airlines such as easyJet and ITA Airways. ESSP will lead the commercialization of Iris services, targeting European Air Navigation Service Providers (ANSPs). The service provision consortium includes ESSP SAS, Inmarsat, and SITA, with other communication network providers expected to join in the future.

Publicerad den Lämna en kommentar

Autonomous vehicles connect the world

Image: gorodenkoff iStock/Getty / Images Plus/Getty Images

Image: gorodenkoff iStock/Getty / Images Plus/Getty Images

Autonomous vehicles are a truly fascinating innovation. Most modern vehicles on roadways around the world have some level of autonomy, ranging from Level 1 features such as cruise control to Level 5 fully autonomous features such as the ability to monitor roadway conditions and perform safety-critical tasks without intervention by a human driver.

Even though autonomous vehicles have been continually developed and tested for years, adoption has been minimal. According to the University of Michigan Center for Sustainable Systems, a majority of researchers, manufacturers and experts predict widespread adoption of Level 5 autonomous vehicles by 2030 or later.

Several barriers have delayed the adoption of autonomous vehicles, such as concerns about safety, data security and cyberattacks; lack of consumer demand; liability laws and lack of regulatory legislation; and doubts as to their economic viability.

While their adoption is slow, autonomous vehicles have been widely praised for the range of benefits they would provide. According to the U.S. National Highway Traffic Safety Administration, they include: much greater road safety due to features such as advanced driver assistance systems, lidar, cameras, inertial navigation systems and more; greater independence for people with disabilities, senior citizens and low-income individuals; reduced road congestion due to the lower number of crashes and an increase in ride-sharing; and environmental benefits as the automotive industry transitions to all-electric vehicles.

Several technology and automotive companies also have seen the potential benefits of autonomous vehicles for many applications and the potential impact they could have on communities worldwide. In response, these companies have supported autonomous vehicle innovation and adoption by offering new products and working closely with educators, nonprofit organizations and other groups who aim to leverage it to connect the world.

Education meets automated racing

Safran Electronics & Defense, which specializes in resilient positioning, navigation and timing (PNT) solutions, has advanced the adoption of autonomous vehicles with its simulation software while simultaneously supporting current students in their academic pursuits.

To jointly develop future PNT technology and solutions Safran’s Minerva Academic Partnership Program supports partnerships with the academic community by providing its technology for student-led research projects that use GNSS signals. Leisa Butler, the program’s chair, elaborated on its mission: “Collaborating with our customers in academia while advancing PNT education is the program’s core purpose. We provide members with access to our powerful Skydel GNSS simulation engine.”

Safran and auburn university students are pictured with their autonomous F1 race car that competed in the Indy Autonomous Challenge on the Las Vegas Motor Speedway at CES 2023. Auburn students used Skydel, a Safran simulation engine, to improve the capabilities of the car and to learn how to make it safe and reliable on the track. (Image: Safran Electronics & Defense)

Safran and auburn university students are pictured with their autonomous F1 race car that competed in the Indy Autonomous Challenge on the Las Vegas Motor Speedway at CES 2023. Auburn students used Skydel, a Safran simulation engine, to improve the capabilities of the car and to learn how to make it safe and reliable on the track. (Image: Safran Electronics & Defense)

As a part of the program, Safran has a long-established partnership with Auburn University’s College of Engineering. Safran and Auburn University students participated in the Indy Autonomous Challenge, which took place on January 7, at the Las Vegas Motor Speedway during the 2023 Consumer Electronics Show. Nine autonomous Formula 1 race cars, representing colleges and universities from around the world, took part in a head-to-head driverless racing competition with some vehicles reaching speeds of more than 190 mph.

Safran has supported Auburn students before, during, and after this challenge by enabling them to leverage its GNSS simulators, such as Skydel and the GSG-8, which are used in the university’s autonomous vehicle lab. Butler said that giving students access to the simulation software prior to the high-speed races helped them troubleshoot and test the vehicles and improve the results.

“Resolving issues in the lab improves safety while saving time and money,” Butler stated. “The Indy car features multiple antennas. Since Skydel can support multiple instances simultaneously, the team can test heading and realistic scenarios in a simulated environment. This is before they race next to other vehicles at high speeds.

Safran also supports the general advancement of autonomous vehicle technology. Positioning and navigating autonomous vehicles involves the use of multiple technologies, including GNSS.

“Skydel is a valuable tool for the autonomous vehicle industry that wants realistic lab testing because it can support multiple, independent trajectories or antenna outputs simultaneously,” Butler said. She also pointed to the importance of developing mitigation techniques against jamming and spoofing.

“Using a simulator with the Skydel engine allows the user to test in all sorts of challenging environments before putting the wheels on the pavement. This lets the user make sure the vehicle is ready for real-world navigation and avoid costly mistakes. It also gives them a chance to practice and develop countermeasures against unintentional interference and malicious actors.”

Butler added that Safran is proud to support students who are helping to develop automated technology.

“Supporting Auburn’s Autonomous Vehicle team is an honor and a privilege. Student research represents the future of our industry,” Butler said. “We are proud to support them and see what they can accomplish with our simulation tools. We are confident that they will be able to gain valuable insights that will help them design, build and test their autonomous vehicles. It is our hope that their hard work will lead to the development of safe, efficient and affordable autonomous vehicles in the future.”

Accelerating mobility

Waymo, based in Mountain View, California, is an autonomous driving technology company. Formerly known as the Google self-driving car project, it was founded in 2009 and aimed to drive more than 10 uninterrupted 100-mile routes autonomously.

Its first fully autonomous ride on public roads took place in 2015, then Waymo became an independent self-driving technology company in 2016. It launched its first public trial of autonomous ride-hailing vehicles, called Waymo One, in Phoenix, Arizona in 2017, and has expanded its completely autonomous ride-hailing service trials to Scottsdale, Arizona, as well as San Francisco and Los Angeles.

The Waymo vehicle fleet also became fully electric this year.

360° Lidar, Radar, and cameras make up most of the technical elements of the fifth-generation Waymo fully autonomous vehicles. They also have redundant steering and braking, backup power systems, redundant inertial measurement systems for positioning, and more. (Image: Waymo)

360° Lidar, Radar, and cameras make up most of the technical elements of the fifth-generation Waymo fully autonomous vehicles. They also have redundant steering and braking, backup power systems, redundant inertial measurement systems for positioning, and more. (Image: Waymo)

Driving Change

According to its website, Waymo “represent[s] a diverse set of communities and interests, and we are coming together because we all share the belief that autonomous driving cars can save lives, improve independence, and create new mobility options.”

Some of Waymo’s community partners include Bike MS, the Arizona Council of the Blind, the Foundation for Senior Living, and Mothers Against Drunk Driving.

One community story to note is Waymo’s partnership with First Pace AZ — a supportive housing community for adults with autism, Down syndrome and other types of neurodiversity — to explore how Waymo could aid neurodiverse people.

Eli is a resident of First Place AZ and an adult with neurodiversity. He does not drive and relies heavily on ride-hailing services, carpooling, and the train to get to work and to volunteer. Not all public transportation is always available or accessible at certain hours. Additionally, human-driven rideshare and carpooling services can present bias from drivers and other passengers who do not understand the behavioral nuances of people who are neurodiverse.

To test the autonomous ride-hail Waymo One system, Eli and Natasha Grant, director of workplace and community inclusion at First Place AZ, hailed a ride to a local animal shelter.

After using the Waymo One service, Eli believed Waymo’s technology could help him stay connected to his community, wherever he may live in the future. Grant added that autonomous vehicles provide independence for individuals who may otherwise not be able to go to places to which they want and need to go.

Breaking social barriers

Community partners that fight food insecurity use Cruise’s autonomous vehicles to pick up left over food from businesses. (Image: Cruise)

Community partners that fight food insecurity use Cruise’s autonomous vehicles to pick up left over food from businesses. (Image: Cruise)

Cruise is a self-driving car company based in San Francisco, California, and offers driverless rides in San Francisco; Austin, Texas; and Phoenix, Arizona. It was founded in 2013 by Kyle Vogt and acquired by General Motors in 2016.

Cruise first offered driverless ride-share services for its employees in 2017. In early 2020, the company began testing those driverless rides on public roads in San Francisco. Later that year, Cruise switched gears and repurposed a portion of its all-electric autonomous vehicle fleet to deliver meals to the community during the COVID-19 pandemic. It also began self-driving delivery trials in Arizona.

In 2021, Cruise announced plans for international driverless testing and expansion in Dubai and Japan. The next year, it opened its fully driverless service to public riders in San Francisco.

Delivering Hope

Cruise works with several community partners, such as the National Federation of the Blind, the SF-Marin Food Bank, and the San Francisco Giants.

“At Cruise, our commitment to social impact is a vital part of our business and an extension of our mission to improve life in our cities, especially for people underserved by transportation today,” the Cruise website stated.

In June, Cruise partnered with Replate — a nonprofit food rescue platform — to fight food insecurity and food waste in San Francisco and other communities. The partnership aims to use Cruise’s all-electric autonomous vehicle fleet, integrated with a national network of food recovery partnership from Replate, to pick up leftover food from local businesses and deliver it to organizations that help fight food insecurity.

The goal of the partnership is to create a sustainable cycle of food rescue that fights hunger and waste in local communities.

Publicerad den Lämna en kommentar

CHCNAV introduces RTK GNSS tablet

Image: CHCNAV

Image: CHCNAV

CHC Navigation (CHCNAV) released the LT800H, a rugged and versatile RTK GNSS tablet designed for geospatial and mapping operations in the field.

The LT800H offers users robust outdoor performance, data security and centimeter-level accuracy for a variety of applications, including construction, environmental surveying and any industry in which Android tablets are required.

Featuring a high-performance 1408 channel GPS, GLONASS, Galileo and BeiDou module and a tracking GNSS helix antenna, the LT800H RTK Android tablet offers centimeter-to-decimeter positioning accuracy in challenging environments. It also comes equipped with a 4G modem to simplify connectivity to GNSS RTK network corrections. The technology also offers an eight-hour battery life, allowing users to collect data in the field uninterrupted.

Publicerad den Lämna en kommentar

EMCORE releases MEMs IMU

Photo: EMCORE Corporation

Image: EMCORE Corporation

EMCORE Corporation has released the TAC-440 MEMS inertial measurement unit (IMU). The TAC-440 IMU is designed for demanding, mission-critical, rugged environments in a wide variety of defense, commercial, industrial and marine applications.

The TAC-440 features 1°/hr gyro bias and 1 mg accelerometer bias stability with very low 0.05°/√hr angle random walk over a wide temperature range. The solid-state quartz sensors and hermetically sealed IMU construction provide reliable MTBF and storage life, EMCORE states.

The TAC-440 supports four data message synchronization methods with either input synchronization pulse capability or an output time of validity capability. The user can choose whether the synchronization pulse is internally generated and output as a time of validity of the output data or whether the TAC-440 software will identify the synchronization pulse input and synchronize the output data to the input pulse.

Publicerad den Lämna en kommentar

KP Performance Antennas launches vehicle GPS antenna

Image: KP Performance Antennas

Image: KP Performance Antennas

KP Performance Antennas has launched its line of vehicle GPS antennas designed for automotive applications.

These antennas come equipped with a high gain of 28 dB and high out-of-band rejection, allowing them to capture weak signals efficiently, even in challenging environments. By minimizing signal interference and multipath effects, the technology aims to provide signal quality and stability to users in applications such as personal vehicles, commercial fleets or autonomous systems.

With waterproof and dustproof ratings of IPX6 or IP66, the antennas can withstand varying outdoor conditions, offering uninterrupted performance even in inclement weather and rough terrains. This design makes them the ideal choice for vehicle tracking, fleet management, telematics and navigation systems.

Publicerad den Lämna en kommentar

Satellite imagery released in response to Libya flooding

Image: Maxar Technologies

Image: Maxar Technologies

On Sept. 10, floodwaters overpowered dams and wiped out entire neighborhoods in eastern Libya, taking the lives of thousands of people and displacing more than 40,000 people, reported the Associated Press.

Maxar Technologies has responded by publicly releasing satellite imagery data that maps the affected areas to support emergency response efforts as a part of its Open Data Program.

The Maxar imagery or data distributed through the program can be quickly integrated into first responder workflows with organizations such as Team Rubicon, the Red Cross and other nonprofits.

Derna and other parts of eastern Libya were hit with extreme flash flooding the night of Sunday, Sept. 10 — an effect of the Mediterranean storm, Daniel.

The National Meteorological Center of Libya had issued early warnings for Daniel 72 hours before it occurred and notified all governmental authorities by e-mail and through media urging them to take preventive measures, reported the Associated Press.

Publicerad den Lämna en kommentar

FocalPoint upgrades Supercorrelation technology

Image: FocalPoint

Image: FocalPoint

FocalPoint has added new functionality to its Supercorrelation technology, S-GNSS, to simplify the integration process for chipset companies.

The company has introduced an API interface between a GNSS chipset and an application or operating system that runs on its own navigation engine, easing deployment of Supercorrelation.

Based on the existing Android open-source interfaces, the S-GNSS API will allow a normal GNSS chipset to run S-GNSS in a separate external host processor. With this additional software added to the GNSS chipset, the overall system can get the performance improvements necessary to upgrade the GNSS receiver to a S-GNSS receiver and offer enhanced positional capabilities.

The S-GNSS API outputs the multipath-free line-of-sight correlation peak for each satellite and the corresponding corrected frequency, codephase and status flags. Optional outputs can be enabled with turn-on keys, spoofer detection and localization, and instantaneous magnetic-free heading estimation.

Supercorrelation has recently been awarded the National Technology award for Security Innovation of the Year and is recognized by the UK Royal Institute of Navigation and the Institute of Navigation. This development is the latest technical upgrade for the S-GNSS product portfolio.

Publicerad den Lämna en kommentar

Inside the box: New NavIC clock outperforms previous generation

Image: metamorworks/iStock/Getty Images Plus/Getty Images

Image: metamorworks/iStock/Getty Images Plus/Getty Images

NVS-01 is the first second-generation satellite of the Indian Navigation Satellite System (IRNSS), also known as Navigation with Indian Constellation (NavIC). It was launched into geostationary orbit on May 20. The satellite is placed at 129.6° eastern longitude and will finally replace IRNSS-1G launched in April 2016.

Whereas the first-generation satellites transmit navigation signals in the L5- and S-band, NVS-01 is the first IRNSS satellite also transmitting in the L1-band. The 1547.42 MHz frequency is also used by other satellite navigation systems, including GPS, Galileo, and BeiDou-3. However, a different modulation is used, namely a Synthesized Binary Offset Carrier (SBOC) signal. The IRNSS L1 SBOC signal has data and pilot components with and without navigation data. Data and pilot signals consist of BOC (1,1) and BOC (6,1) components with sub-frequencies of 1.023 MHz and 6.138 MHz. A quadrature multiplexing is applied for the data and pilot components with a power sharing of 41.82% and 58.18%. The navigation message on the IRNSS L1 signal has a different structure compared to those on the legacy L5- and S-band signals. The new L1 navigation message uses an advanced frame structure and forward error correction inherited from the CNAV-2 message of the GPS/QZSS L1C signal as well as a similar orbit model. Among other things, it provides inter-signal corrections for the L1 data and pilot signals with reference to the S band signal for single-frequency L1 band users.
NVS-01 started signal transmission on June 17, 2023, with the pseudo-random noise (PRN) code I10. The satellite’s L1 and L5 signals were tracked by a Septentrio PolaRx5 receiver located in Tokyo, Japan, with a prototype firmware that is capable of tracking the L1 pilot signal. Figure 1 shows the multipath linear combination of NVS-01’s L1 and L5 pilot signals. Whereas the short-term variations are smaller for L1 compared to L5, the overall RMS is 18 cm for both signals.

PFigure 1: Noise- and multipath linear combination for NVS-01’s L1 and L5 pilot signals received on 26 June 2023.

Figure 1: Noise- and multipath linear combination for NVS-01’s L1 and L5 pilot signals received on 26 June 2023. (Image: All figures provided by the authors) 

Whereas IRNSS-1’s rubidium clocks were provided by Spectratime, NVS-01 is the first satellite operating a new type of rubidium atomic frequency standard (RAFS) developed in India. The short-term performance of GNSS satellite clocks can be evaluated with the one-way carrier phase method. The receiver is connected to a highly stable external clock, e.g., a hydrogen maser. Thus, the receiver clock error is negligible. Measurement biases as well as the delays of ionosphere and troposphere on short time scales are removed by fitting a fourth-order polynomial. If no external clock is available, as is the case for the station in Tokyo, the precise clock information can be transferred from another station by a reference satellite jointly tracked by both receivers.

The Allan deviation based on this three-way carrier phase (TWCP) analysis is shown in Figure 2. The hydrogen maser of the IGS station USUD in Usuda, Japan, is used as the reference clock. At short integration times up to 20 s, the Allan deviation computed from the TWCP analysis is dominated by the GNSS measurement noise hiding the true clock performance. Above 20 s, the TWCP demonstrates that the NVS-01’s RAFS stability meets the performance of the ground tests and even exceeds them for longer integration times. At all integration times, the new RAFS outperforms the first generation IRNSS clocks.

Figure 2 IRNSS clock performance obtained from three-way carrier phase analysis as well as ground tests.

Figure 2: IRNSS clock performance obtained from three-way carrier phase analysis as well as ground tests.

Manufacturers

GNSS data used in this article were collected with a Septentrio PolaRx5 receiver.

Further Reading

Bandi TN, Arora R (2019) Indigenous Atomic Clock and Monitoring Unit for NavIC. ICG-14, https://www.unoosa.org/documents/pdf/icg/2019/icg14/WGD/icg14_wgd_09.pdf

ISRO (2022) NavIC Signal in Space ICD for Standard Positioning Service in L1 Frequency, Version 1.0. U.R. RAO Satellite Centre, Indian Space Research Organization, Bangalore, https://www.isro.gov.in/media_isro/pdf/SateliteNavigation/Draft_NavIC_SPS_ICD_L1_Oct_2022.pdf


Peter Steigenberger and Oliver Montenbruck are scientists at the German Space Operations Center of the German Aerospace Center (DLR), where they conduct research in the field of new satellite navigation systems.

Jean‑Marie Sleewaegen is Lead Architect at Septentrio, Belgium, where he has been responsible for GNSS signal processing, system design and technology development since the company’s inception in 1999.

Publicerad den Lämna en kommentar

u-blox launches new dual-band GNSS module


u-blox has released its latest positioning module, the NEO-F10N. The module is based on the u-blox NEO form factor and is equipped with u-blox F10 dual-band GNSS technology. It supports L1/L5 GNSS bands from multiple constellations, including NavIC, to provide solid meter-level position accuracy in urban areas.

The technology’s firmware is upgradeable and configurable to support a variety of applications such as vehicle aftermarket telematics and micromobility or industrial applications requiring meter-level position accuracy.

The NEO-F10N provides resilience against multipath interference and leverages signals from both the L1 and L5 bands. The module aims to increase accuracy, reduce power consumption and offer an alternative solution to users who do not want to deploy dead reckoning (DR) setups.

Users currently employing receivers based on modules, such as the u-blox NEO-M8 and NEO-M9, can seamlessly upgrade to the new NEO-F10N generation.

U-blox also introduces the new ANN-MB5 L1/L5 antenna to strengthen u-blox’s F10 dual-band solution. This tailored antenna offers an easy and reliable option for meter-level applications that require multi-band and multi-constellation support, even in challenging environments.