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pierredv : radar   41

How AI Will Help Radar Detect Tiny Drones 3 Kilometers Away - Defense One
via Brian Daly, AT&T

"AESA radars, which steer its multiple radar beams electronically instead of using physical gimbals, have been around for years. The real innovation lies in training software to detect objects, including objects as small as DJI’s popular Mavic drones, in radar imagery. But there’s very little imagery data to train a machine learning algorithm on how to see something that small. What’s needed is a dataset of extremely small modulations in the echoes of radar signals. The researchers used a GAN to turn a small bit of available training data into an abundance."
AI  radar  drones  UAS 
july 2019 by pierredv
Echodyne gets OK to conduct drone detection at Super Bowl | FierceWireless Jan 2019
The FCC has given Echodyne the go-ahead to operate two low powered fixed radar transmitters in the immediate vicinity of Mercedes-Benz Stadium in Atlanta during Super Bowl LIII on Sunday.

The radars are intended to be used as part of a drone detection system that will be installed at the perimeter of the stadium to alert security personnel, including federal officers, of any unidentified drone activity during the big game, according to material the company submitted to the FCC.
FierceWireless  FCC  Echodyne  drones  detection  radar 
january 2019 by pierredv
Researchers explore tangible applications for Google's Project Soli radar | FierceWireless Jan 2019
"In a paper published last month and unearthed last week by The Verge, the University of St Andrews researchers describe how they used radar sensing and machine learning for exploring tangible interactions that they term “Solinteraction.” They proposed using radar as a sensing platform for tracking the identity of an object or number of proximate objects to enable a tangible user interface."

"Soli is a mono-static, multichannel radar device operating in the 57-64 gigahertz range using frequency modulated continuous wave, where the radar transmits and receives continuously. Soli is designed for capturing micro finger motion for enabling interaction with computers, but RadarCat exploited it for object and material recognition."
FierceWireless  Google  radar  sensors 
january 2019 by pierredv
EO SAR Imagery Prices Limit Opportunity - NSR Dec 2018
"In theory, radar imagery for Earth Observation is far superior to optical. With imagery capable of capturing scenes at night and penetrating clouds, SAR overcomes many challenges inherent to imaging the Earth with passive optical sensors.

"It would seem that investors are banking on these capabilities for increased coverage and insights from SAR imagery given recent funding announcements from Iceye, and Ursa Space. Revisit and analytics are cited as key drivers, with many working to develop algorithms for analyzing and monitoring assets, even across traditional vertical markets.

"However, in practice, SAR revenues and market penetration remain relatively low, and NSR does not expect radar to overtake or greatly outpace the optical opportunity anytime soon."

"When examining EO data adoption, one must consider resolution, revisit, and pricing as key customer-decision factors."
radar  remote-sensing  satellite  NSR  EO 
december 2018 by pierredv
Capella Space raises $19 million for radar constellation - SpaceNews.com Sep 2018
"Capella Space, a startup planning a constellation of radar imaging satellites, has raised an additional $19 million to fund continued development of its system. ... has raised approximately $35 million to date...

That funding will support development of what Capella Space ultimately plans to be a 36-satellite constellation providing synthetic aperture radar (SAR) imagery with hourly revisit times. "

"SAR offers the benefit of being able to collect imagery regardless of time of day or amount of cloud cover, unlike optical imagery. However, it’s also had a reputation for being more difficult to work with, an issue Banazadeh said is fading with the rise of automated systems to interpret the imagery and extract the desired information."

Matt Ocko of DCVC: “Commodity trading, urban development, critical infrastructure, shipping and security: businesses across the board realize that milliseconds matter in today’s global economy, and a steady stream of reliable, easily accessible Earth information just does not exist.”

"Commercially, he said major customers will likely come from the infrastructure monitoring, maritime and agricultural markets."
SpaceNews  remote-sensing  EO  CapellaSpace  satellite  SAR  radar 
september 2018 by pierredv
Space Radar Satellites Tracking Earth From Space - Nanalyze June 2018
The ability to shrink space radars down to below 100 kilograms is a real game changer in terms of both construction and launch costs for these types of satellites. ICEYE seems to have taken the lead and is already improving the resolution without adding much bulk (about 20 pounds) to its next-generation SAR satellite. As the constellation grows, it will provide even faster “revisit” rates, meaning updated data on the same geographic location, on the scale of just a few hours. That’s important not just for automating something like shipping traffic but for, say, managing assets during a natural disaster such as a hurricane, where persistent cloud cover would foil optical satellite systems.
space  remote-sensing  ICEYE  radar  SAR  nanalyze 
june 2018 by pierredv
Space Fence on Kwajalein will allow Air Force to monitor debris, threats - Pacific - Stripes Apr 2017
"The Air Force Space Surveillance System, which shut down in 2013 after 50 years, tracked about 20,000 objects. Space Fence, a tracking system being built by Lockheed Martin on the remote South Pacific island of Kwajalein, is expected to be able to track 200,000."

"Space Fence will be able to detect objects as small as marbles at the roughly 250-mile height of the International Space Station. Such a small speck of debris might sound benign, but NASA has replaced space shuttle windows damaged by flying paint flecks."
space  USAF  orbital-debris  SSA  LockheedMartin  radar 
may 2018 by pierredv
AGI establishes commercial deep space radar tracking system - SpaceNews.com
"AGI and Thoth Technology said they have set up a radar system on a 46-meter antenna at the Algonquin Radio Observatory in Ontario. The system is capable of tracking objects out to distances of 50,000 kilometers, and can detect objects about two meters across on GEO."

“We want to get down to 20 centimeters or less.”

"Johnson said that combining the radar observations with existing optical observations of GEO belt objects improves the accuracy of positions of those objects to 150 meters, compared to 250 meters using optical observations alone"
SpaceNews  AGI  SSA  space  radar  GEO  orbital-debris 
may 2018 by pierredv
European Space Agency teams with ICEYE Finnish start-up - BBC News Mar 2018
"The European Space Agency is to work with Finnish start-up ICEYE on ways to exploit its novel radar satellites. ICEYE-X1 was launched in January - the first of multiple spacecraft that will go up in the coming years. About the size of a suitcase, these are the world's smallest synthetic aperture radar satellites and cost a fraction of traditional platforms."

"ICEYE wants to couple this vision with high temporal resolution, meaning a single spot on the Earth's surface would be surveyed several times a day. Algorithms will scour the data to detect significant changes. High-repeat requires a network of satellites, and ICEYE envisages perhaps 30 platforms in orbit."
BBC  space  EO  EarthObservation  ICEYE  satellite  smallsats  ESA  SAR  radar 
march 2018 by pierredv
US joins EU in opening 76-81 GHz for car radar — PolicyTracker, Aug 2017
"The Federal Communications Commission (FCC) decision expands the current 76-77 GHz allocation to the entire 76-81 GHz band and transitions vehicular radars out of 24 GHz, bringing the US into alignment with Europe. Expect commercial take-up in the higher band soon, said one telecoms attorney"
PolicyTracker  FCC  radar  automotive 
august 2017 by pierredv
UK regulator to allow Wi-Fi at 5.8 GHz before rest of EU — PolicyTracker: the spectrum management newsletter
Interference concerns came from users of the fixed satellite service; radar; programme making and special events equipment; broadband fixed wireless access; amateur radio and satellite; and short-range devices (SRDs), including drones. "We examined these coexistence arguments... and have not found a compelling reason not to authorise 5.8 GHz for Wi-Fi services given the benefits this extension will deliver for citizen[s] and consumers," Ofcom said. It set a proposed power limitation at 200 mW equivalent isotropically radiated power (EIRP) per channel, with no fixed outdoor use, and with a requirement to implement specific techniques to avoid interference into radar.
PolicyTracker  Wi-Fi  Ofcom  Interference  radar  5GHz 
march 2017 by pierredv
Why we lost the weather radar channels
In twenty cases of reported interference, the following themes stood out (some of these overlap, so if you add them up you will get to more than 20):

DFS was disabled in three.
TDWR  5GHz  interference  radar  DFS 
september 2016 by pierredv
Why Wi-Fi Stinks—and How to Fix It - IEEE Spectrum
Wi-Fi congestion will soon get even worse, thanks to the mobile-phone carriers, which have exhausted much of their exclusive spectrum. These wireless carriers are planning to off-load mobile-data transmissions, as much as 60 percent within the next three years, onto the unlicensed spectrum used by Wi-Fi.
IEEE-Spectrum  Wi-Fi  5GHz  DFS  radar 
july 2016 by pierredv
Military spectrum management & EW challenges drive wireless monitoring tech - Cambridge Network
" As you can imagine if someone paid $48 billon for spectrum commercial enterprise they would want to recoup that cost. For example if a military platform is turned on and blanks out service to their customer base this would be unacceptable."
"For instance it is reported that the National Oceanic Atmospheric Administration (NOAA) has experienced interference issues on satellite weather data resulting in periodic data loss affecting their ability to continuously monitor regional weather events."
CRFS  spectrum  SDR  NOAA  interference  AWS-3  jamming  radar  ELINT  EW 
march 2016 by pierredv
Europe still divided over 2.7–2.9 GHz band - PolicyTracker Aug 2015
"A disagreement over Europe’s Common Position for WRC-15 on the 2.7–2.9 GHz band pivots on whether the band really can be shared between mobile broadband and incumbent radar applications by segmenting the latter in the upper part of the band." "The GSM Association’s campaign includes an economic study from Aetha Consulting, as well as a technical study that it has undertaken itself. The Aetha study, from 2013, claims the economic benefits of making the band available for mobile services amount to 11 times the cost of relocating radars and installing additional filters. Its technical study responds to the claim from incumbent meteorological, aeronautical, and military radar stakeholders that sharing or segmentation of the band is impossible or at least unproven and inadequate for their requirements. The assumptions underlying this argument are set out in ECC Report 174 and ITU-R Recommendation M.1464-2. "
2.7GHz  radar  WRC-15 
august 2015 by pierredv
Ofcom | Award of the 2.3 and 3.4 GHz spectrum bands: Update on the coexistence of 2.3 GHz LTE with Wi-Fi in the 2400 to 2483.5 MHz range and other coexistence issues
"This document sets out a further analysis of potential coexistence issues between new mobile broadband services in the 2.3 GHz band and Wi-Fi and other services in the neighbouring 2.4 GHz band. This follows a consultation published in February 2014. The Ministry of Defence is releasing the 2.3 and 3.4 GHz bands to Ofcom for award in late 2015 or early 2016, through an auction, as part of the Public Sector Spectrum Release programme. We expect both award bands to be of interest to mobile network operators wanting to provide extra capacity for mobile broadband. The 2.4 GHz band is accessed by various services on a licence exempt basis, including Wi-Fi. Our assessment is that there will be very little impact from mobile services in the 2.3 GHz band. If interference does occur, there are some mitigations available, the most effective being use of the alternative 5 GHz Wi-Fi band. This document also assesses coexistence issues for radar and satellite operating close to the 3.4 GHz band. "
2.3GHz  2.4GHz  ATC  radar  spectrum  ofcom  coexistence 
december 2014 by pierredv
FCC rule: requires radar detectors to comply with limits on radiated emissions in the 11.7-12.2 GHz band = Federal Register, Volume 67 Issue 145 (Monday, July 29, 2002)
SUMMARY: This document requires radar detectors to comply with limits on radiated emissions in the 11.7-12.2 GHz band to prevent interference to satellite services. Radar detectors are required to be approved by the Federal Communications Commission or another designated organization before they can be marketed within the United States.
VSAT  radar  radar-detector  interference  FCC  rules  rulemaking 
september 2014 by pierredv
Common Ground: Putting The Brakes On Radar Detectors - Via Satellite Apr 2002
"In what has to be the most unlikely pair-up to occur outside a World Wrestling Federation ring, the U.S. satellite industry is preparing to lock horns with the manufacturers and importers of radar detectors over the sale, or use of these ubiquitous devices. "
VSAT  radar  radar-detector  interference 
september 2014 by pierredv
New Technical Reports Evaluate Spectrum Sharing in 3.5 GHz Band, July 2014
"NTIA Technical Report TR-14-506, co-authored by Geoffrey A. Sanders, John E. Carroll, and Frank H. Sanders of NTIA’s Institute for Telecommunication Sciences in Boulder, Colorado, and Robert L. Sole of NTIA’s Office of Spectrum Management, presents the results of measurements and analyses of the effects of radar interference on prototype LTE equipment. NTIA Technical Report TR-14-507, co-authored by Frank H. Sanders, John E. Carroll, Geoffrey A. Sanders, Robert J. Achatz, and Robert L. Sole of NTIA and Lawrence S. Cohen of the U.S. Naval Research Laboratory, presents the results of measurements and analyses of the effects of LTE interference on a type of radar receiver that might eventually share spectrum with such systems."
NTIA  ITS  LTE  radar  3.5GHz 
july 2014 by pierredv
Could data be sent on radar radio waves? PolicyTracker Jul 2014
"Orthogonal frequency division multiplexing (OFDM) encoding could allow radars and communication services to share the same radio waves, according to Friedrich Jondral of the Karlsruhe Institute of Technology. This would enable mesh networks on radar spectrum." "The professor has performed tests at 24 GHz, but he says that it would be most useful at 72 GHz, because this is the spectrum the automotive industry plans to use for automotive radar. However, these radars would only be able to operate at a maximum range of a couple of hundred metres, so would only be usable for cars or in factory production lines. It would also only be able to transmit a couple of hundred kilowatts."
PolicyTracker  radar  OFDM 
july 2014 by pierredv
Millimeter Waves - GHN: IEEE Global History Network
"The millimeter-wave region of the electromagnetic spectrum corresponds to radio band frequencies of 30 GHz to 300 GHz and is sometimes called the Extremely High Frequency (EHF) range" "Certain characteristics of the earth’s atmosphere pose both problems and solutions for millimeter wave applications. For example, at 60 GHz (5 mm or 0.2 inches wavelength) oxygen molecules will interact with electromagnetic radiation and absorb the energy."
collision-avoidance  radar  60GHz  IEEE  Global  History  Network  radar  mmWave 
august 2013 by pierredv
Military Considers Sharing Radar Frequencies with Wireless Networks | MIT Technology Review
"While commercial wireless networks are congested, frequencies set aside for military purposes are lightly used. Now wireless researchers and the U.S. Navy will get a chance to see whether some of those airwaves can be shared, which could lead to innovative new services. In a test on Monday, the Navy will fire up an AN/SPY 1 radar—a powerful system that normally scans for incoming missiles and bombers—on an island off Virginia’s eastern shore. At the same time, visiting academic and corporate researchers will tune portable wireless transmitters to the same frequency to see what happens."
spectrum-sharing  3.5GHz  radar  LTE 
august 2013 by pierredv
Project Runway: FCC Authorizes Radar for Detecting Foreign Objects on Airport Runways : CommLawBlog
"78-81 GHz will be available for radiolocation, but for FOD only, and only on a licensed basis.  (In a separate proceeding the FCC will continue to consider whether to authorize unlicensed radar operations for other applications in a number of bands, including this band.)" "Note, though, that a nearby band at 76-77 GHz is authorized for unlicensed FOD radar at respectable power levels. "
aviation  waiver  CommLawBlog  radar  80GHz  FCC  rules  mmWave 
july 2013 by pierredv
UK weather forecaster worries about interference from SRDs — PolicyTracker: the spectrum management newsletter
"The UK's official weather forecaster, the Met Office, has warned that plans to free up spectrum for short-range devices such as smart meters could cause serious interference problems with some of its forecasting equipment. The regulator is proposing that all the spectrum be released, on a licence-exempt basis, for short-range devices (SRDs) and radio-frequency identification (RFID). The only fly in the ointment is the Met Office, which operates two Doppler Wind Profiling Radars (WPRs) in the 915-917 MHz band being released by the MoD. Because the Met Office is not convinced either Ofcom’s or CEPT’s proposals will provide protection for its existing WPRs, let alone for any new ones, it is rejecting the licence-exempt model and requesting “some form of licensing regime”."
unlicensed  weather  radar  interference  radar  PolicyTracker  Ofcom  SRD 
may 2013 by pierredv
Low-cost radar: A programme worth watching | The Economist March 2013
Trial of passive radar by Thales and NATS, British air traffic control agency multi-static primary surveillance radar (MSPSR) "The growth in radio and television broadcasts—especially with digital and high-definition TV—now provides an enormous amount of high-frequency radio waves which are ideally suitable for passive radar systems. Moreover, the availability of cheap and powerful computing makes it feasible to analyse the data required to build a system like MSPSR. Thales and its partners expect to be able to produce results as good as conventional radar. "The trials are designed to see how passive radar could support Britain’s air-traffic management. . . With growing demand for wireless devices, passive radar would allow the radio spectrum currently used by conventional radar to be freed up and auctioned off to mobile operators."
aviation  air  traffic  control  ATC  NATS  DTV  UK  Thales  radar  TheEconomist 
march 2013 by pierredv
Shared Spectrum Access for Radar and Communications (SSPARC) - Federal Business Opportunities: Opportunities
See attached DARPA-BAA-13-24 document for solicitation details. See DARPA Special Notice 13-25 for the Proposer's Day Announcement related to this BAA at the following link: https://www.fbo.gov/spg/ODA/DARPA/CMO/DARPA-SN-13-25 /listing.html "Added: Feb 21, 2013 1:04 pm DARPA is soliciting innovative research proposals in the area of spectrum sharing between radar and communications systems. Proposed research should investigate innovative approaches that enable revolutionary advances in science, devices, or systems. Specifically excluded is research that primarily results in evolutionary improvements to the existing state of practice."
communications  Darpa  radar  research  SSPARC 
march 2013 by pierredv
ISART 2011 program
Conference that focused on RADAR: - see lectures Lecture: Basic Radar Principles, Greg Showman (GTRI/SEAL) Lecture: Radar Frequencies and Waveforms, Michael Davis (GTRI/SEAL) Lecture: Radar Adaptive Interference Mitigation, Bill Melvin (GTRI/SEAL) Lecture: Radar Transmitter Technologies, Larry Cohen (NRL) and Charles Baylis (Baylor) Lecture: Key Differences between Radar and Comm Systems, Michael Davis (GTRI/SEAL)
NTIA  ISART  tutorial  ITS  radar  conference 
february 2013 by pierredv
Ofcom | Spectrally Efficient Radar Systems 2006
"Ofcom is researching this area to:
= demonstrate the practicality of techniques which will
+ improving the spectral efficiency of radar systems
+ allow radar systems to operate in different bands
= establish a cost benefit analysis, determining the costs of modifying and re-certifying existing radar systems or deploying new systems, and comparing them to the value of the spectrum released for other commercial applications. "
Ofcom contract issued to BAE Systens
interference  efficiency  radar  ofcom 
january 2013 by pierredv
Types of Radars
great summary of various types used by militar
wireless  spectrum  DoD  defense  radar  * 
march 2012 by pierredv
Weather Radar Interference Enforcement | FCC.gov
From Rashmi Doshi via Mike Cotton, re question about Rashmi's comments at ISART that "The FCC Enforcement Bureau has levied numerous penalties on U-NII device operators for unauthorized use of such equipment" (the TDWR/U-NII interference case)
FCC  radar  enforcement  interference  5GHz  U-NII  TDWR 
december 2011 by pierredv
NTIA Report 11-473: Case Study: Investigation of Interference into 5 GHz Weather Radars from Unlicensed National Information Infrastructure Devices, Part I
In early 2009, the FAA became aware of interference to Terminal Doppler Weather Radars (TDWRs) that operate in the 5600– 5650 MHz band. Investigation by NTIA ITS staff traced it to unlicensed U–NII DFS devices operating in the same frequency band. this is Part I of three
NTIA  RF  U-NII  radar  interference 
october 2011 by pierredv

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