Septentrio receiver tracks newest Japanese GNSS signals

Hong Kong – 12 October 2016Septentrio and its Japanese partner, GNSS Technologies, are proud to announce that they have successfully tracked and decoded the QZSS LEX signal. This achievement marks a milestone in the development of the Japanese QZSS satellite navigation system and is the result of a trusted partnership between Septentrio and GNSS Technologies. The partnership is committed to enable the success of their Japanese customers with the very latest in satellite navigation technology.

QZSS (Quasi-Zenith Satellite System) is Japan’s regional satellite navigation system. When completed, it will consist of 4 satellites: the first satellite was launched in 2010 and the remaining three are scheduled to become operational in 2017. All satellites will be equipped with a revolutionary CLAS (centimetre-level augmentation service). This service will send correction signals straight from the QZSS satellites to end-user receivers and enable them to calculate their position with centimetre-level accuracy. The CLAS corrections are broadcast in the LEX and L6 signals.

By implementing LEX signal tracking and decoding before the completion of the QZSS constellation and before the CLAS service becomes operational, Septentrio and GNSS Technologies are showing their long-term commitment to Japanese customers.

Using Septentrio technology, customers will be able to eliminate the need for investment in ground infrastructure to create correction signals or in subscriptions to commercially available correction signal streams. This opens up possibilities in new application domains in sectors such as marine, construction, agriculture, survey and mapping, geographic information systems (GIS) and unmanned aerial and vehicles (UAVs).

20 Things They Don’t Tell You About UAVs

Elliott Enterprises suggest investment in an extra GNSS Rover or two (much lower cost than a UAV) to collect more topographical data….unless the projects justify the risk of loss of equipment, poor results and operational cost, amortization of purchase cost plus initial training and licensing required to perform UAV photogrammetry professionally….the risk is much higher than the rewards!

Neil Vancans and Doug Daggermond - UAV

Jack Dangermond, ESRI and Neil Vancans, Septentrio admire the Septentrio enabled C Astral UAV at Esri UC 2016

I have worked on projects with Mark Deuter’s company, AEROMETREX (the author of the blog) as a mapping and survey consultant in Australia.  AEROMETREX are an industry leader in photogrammetry and are respected across Australia. Their client portfolio consists of goverment, mining, environmental and real estate mangement.  by Desmond Elliott

To UAV or NOT to UAV…! by Aer0metrex_admin

RQ-84Z AeroHawk UAV system at hte end of a mapping mission.The energy, enthusiasm and the inventiveness that is going into UAV* technology these days is truly remarkable. There has been a proliferation of manufacturers, suppliers, users and conferences promoting the technology. We have all seen stunning video clips and images taken from UAVs – the low altitude aerial perspective enables unique views of a wide sweep of surrounds as well as the foreground focus of attention.

In July 2012 I attended the ESRI International User Conference in San Diego and assisted a UAV manufacturer on their trade exhibit, fielding questions from potential customers of this technology. It was a revelation, not only because of the technology, but because of the reaction of the punters. I could see it in their eyes. Everyone wanted to do this for a job. “Get paid to have fun? I’m in!”

As a long-standing aerial surveyor I have watched the rise of UAVs with an open mind. Indeed the company that I part-own and work for is a CASA-registered UAV operator and we have invested heavily in the technology. We know what it takes to make a good UAV aerial survey and we can show some great examples of our work. However we are in the somewhat unique position of being able to compare the cost-effectiveness and the results of UAV aerial surveying against the latest full-scale aerial surveying equipment and methodology, because we have both capabilities.

I can say right here and now that the concept of UAVs as a platform for aerial surveying is suffering from a typical problem that plagues new technologies. It’s over-hyped. Yes, you can take an aerial photograph with a UAV. Yes, that photograph can be used to map an area of interest. But no, in 99% of cases you cannot do it as well, as fast or as cheaply as you can with a large-format aerial camera in a conventional fixed-wing aircraft. That may surprise you but it’s true.

With apologies to Ha-Joon Chang, the author of the excellent book “23 Things They Don’t Tell You About Capitalism” ** I have set out here 20 things they don’t tell you about UAVs.

Please note that in this article we are referring to very small to small UAV ( A very small UAV is defined as an unmanned aircraft of mass smaller than 2 kilogram –  A Small UAV is defined as an unmanned aircraft of mass greater than 1 kilogram yet less than 150 kilograms (fixed wing) or 100 kilograms (rotary wing)).

SENSOR

Thing #1. A UAV is just a platform for a sensor

A lot of discussion in the UAV industry revolves around which UAV is best. Every manufacturer stridently proclaims the advantages of their system in terms of battery life, stability, payload, range control functions, etc. But hardly anyone acknowledges that a UAV is just a platform for a sensor. We don’t make a big fuss about whether we use a Cessna 441 or a Cessna 404 or a Piper Navajo to fly your aerial survey. To us an aircraft is just a means of positioning a sensor. It’s not about the aircraft, it’s about the sensor.

Thing #2. A small UAV carries a small payload which means small format sensors

There is no doubt that you can cram lots of megapixels into a compact camera or a DSLR these days. But even a 36MP DSLR camera is small format compared to the latest generation large-format aerial mapping cameras, at 360MP or even bigger. Small UAV = small format sensor = lots more runs and photos = inefficient capture.

Thing #3. A $1,000 sensor is not as good as a $1.5m sensor

There are sensors and sensors. Most UAV systems carry small compact cameras to eke out precious payload. More sophisticated systems may be able to carry a DSLR camera. But these are non-metric consumer grade cameras, with uncalibrated lenses, prone to temperature variation, with limited storage on-board and using Bayer-filtered 3-band RGB imaging systems. They are not to be compared with modern aerial mapping cameras which have much bigger formats, separate lens cones for each multispectral channel, often in 4 bands (R,G,B and NIR) along with dedicated panchromatic cones, which have geometrically calibrated lenses with known distortion characteristics, with gyro-stabilised mount correcting level and drift, with almost unlimited storage and extremely sophisticated airborne GPS, IMU and navigation systems. Not surprisingly, a $1000 sensor is just not as good as a $1.5m sensor.

OPERATIONS

Hawkeye-UAV groundstation

Hawkeye-UAV groundstation

Thing #4. A UAV is not unmanned

Strangely, an Unmanned Aerial Vehicle is not unmanned at all. The men/women are on the ground. Hence the new terminology RPAS (Remotely Piloted Aerial System). There are usually two operators, just the same as the aircrew in a light aircraft. Where is the saving? 

Thing #5. Labour costs make small UAVs uncompetitive

Do the maths. Don’t forget to include the time and cost of getting the UAV operators to and from the survey area, the time needed to conduct the survey, the costs of accommodation and travel allowances, and the cost of masses of GPS ground control. As well as the salaries for 2 skilled people (UAV operator, surveyor). Adds up pretty quick. We reckon it’s more efficient to get a large-format system in for anything bigger than a few km2, even if you’re right there on the spot with a UAV.

Thing #6. UAVs are justifiably limited by airspace regulations

CASA (Australia’s Civil Aviation Safety Authority) is very concerned about the prospect of an airspace swarming with UAVs and has imposed strict limits on commercial UAV operations. We have already seen one instance in which a UAV operator (not us!) lost control of a UAV which flew across the flight path of a military airport. And one has now hit a jet aircraft in flight.

UAVs may only be operated by CASA-certified operators and can only legally be operated as follows:

  • Not above 400’

  • Not over a populated area

  • Not within 3.5nm of an airport

  • Not outside VLOS (Visual Line of Sight)

unless specific approval has been granted. These applications are considered on a case-by-case basis by CASA and the waiting period for a response was out to several weeks last time we applied. Fact is, if you operate legally there are not many places you can fly a UAV commercially.

Thing #7. Line of sight is no more than 500m

Try spotting a small UAV flying away from you. It takes about 15 seconds to completely disappear. Therefore run length is limited to 30s flight time, unless you station observers along the flight path equipped with radios for back-to-base comms.  This has been tried. See Thing #5. 

Thing #8. You will need formal training to operate a UAV legally

To be qualified as a UAV operator, you will need:

  • Basic Aeronautical Knowledge (BAK) or Private Pilots Licence (PPL).

  • Radio operators licence

  • Manufacturer training on type

and then pass the CASA exam. You can’t just take it out of the box and start flying.

Thing #9. A UAV is capable of killing you

Our small UAV system weighs 3.8kg (the same as a brick) and it travels at up to 120km/hr (33m/s). If it hits you in the face at that speed it will decelerate almost instantly, say in 0.1s.  No laughing matter.

My high school physics tells me Force = mass x acceleration.

So F = 3.8kg x (33/0.1) m/s2 = 1,254 Newtons. In the face.

Serious injuries have been caused by powerful UAV propellors and, as was demonstrated by Mythbusters recently, a large multi-rotor UAV propeller could sever an artery. There are a number of accounts on the web of unmanned helicopters decapitating their operators. Check your training, your safety systems and insurances. Don’t think they are too small to hurt anyone.

Thing #10. UAVs suffer from local environment effects (especially wind)

UAVs are very small aircraft and subject to forces that would not affect larger aircraft. Wind is especially problematic for small UAVs, and wind is often stratified, ie, much different even at 400’ than it is at ground level. Weather forecasts are usually published for ground level conditions. Can you really keep your UAV on track? Will your UAV be able to grind its way back to base in a 40 knot headwind?

Thing #11. The logistics of UAV operation are problematic

Think again if you are planning to provide a UAV service in remote areas, which if Thing #6 is properly observed, is where you will end up. Do I drive or do I fly to the site? If it’s too far to drive or the roads are rubbish, or don’t exist, perhaps I could get there in a light aircraft, or a helicopter? Wait …

Thing #12. Blurry images cannot be used to generate accurate results

We are sometimes asked to save UAV surveys which are comprised of blurry, badly exposed imagery.Lack of detail destroys the effectiveness of image matching algorithms, resulting in lack of tie points and geometric accuracy. Such surveys are usually unsalvageable and must be reflown.

Thing #13. Eagles hate UAVs

With a passion. The last thing any self-respecting eagle will tolerate is another predator blundering through its territory not even bothering to look up – the arrogance! Eagle hits on UAVs are common. See Thing #14.

ECONOMICS & RISK

slip-up-709045_640

Thing #14.  The capital cost of a UAV is significant

A sophisticated UAV is likely to set you back anywhere from $30,000 to $100,000. Let’s say you get a bargain at $50,000. What is its useful life? 200hrs? Let’s amortise that cost over 12 months assuming you’re a skilled pilot and can run the gauntlet of crashes resulting in total loss that long. It will cost $260 per hr in capital burn alone. About as much as the total running cost of a Cessna 172. 

Thing #15.  UAV crashes are common

The stories are mounting. UAVs escaping, getting lost, slamming into mine walls, crash landing, etc, etc. All expensive stuff. What is the life of a UAV system? Who knows? Only as long as your next uncontrolled event.

Thing #16. UAV insurance is hard to get

Not unrelated to Thing #15. UAV hull insurance (the aircraft and payload) is usually uneconomic and most operators insure for public liability risk only. That means a crash is usually a loss borne by the operator, and will add tens of thousands of dollars to your depreciation for the year. Hope you weren’t still paying off that loan. Please tell me there aren’t any UAV operators flying without Public Liability insurance. That would be financial suicide. See Thing #9. 

Thing #17.  You will need Professional Indemnity Insurance if you offer an aerial surveying service

Don’t even think about offering your services to a mining company or other engineering firm if you don’t really know what you are doing and you don’t have PI insurance. Your clients have too much money at stake. An error in calculation is a recipe for financial ruin. PI insurance is both expensive and necessary.

SKILLS

Thing #18.  If you’re not skilled in photogrammetry, you’re not an aerial surveyor

Most registered UAV operators optimistically put ‘aerial survey’ as a work category on their CASA application forms. Aerial photographic surveying is an exact and demanding science. A thorough understanding of photogrammetry is required to offer these services. Photogrammetric qualifications are usually offered as an advanced specialisation of a Surveying Degree. Buying a software package that promises centimetre accuracy does not enable anyone to become an overnight expert.  There are many traps for the unwary and industry best practice and university qualifications cannot be ignored.

Thing #19.  Airborne GPS and IMU for UAV are not accurate enough for direct geo-referencing

The Airborne GPS and Inertial Measurement Unit (IMU) technology that has been used in large-format digital aerial cameras since 2005 is the same technology that is used in guided missiles. Not surprisingly, some of it is embargoed by the US State Dept. It’s very sophisticated. The resolution of these measurement systems is very precise and is vital to determining the accurate position and attitude of the camera in flight. While advances have been made in the miniaturisation of these devices for consumer application in smart phones as well as UAVs, they really lack the resolution needed for accurate measurement.

FUTURE

Thing #20.  While we’ve all been watching UAV developments, other things are happening

The developments that have taken place in our industry are profound, and we should be very proud of them. But they are not really to do with UAVs at all. They are things like:

  • Much more efficient sensors. The Ultracam Eagle Prime, and the A3 Edge come to mind. Huge aerial camera sensors with outstanding capture efficiency and storage.

  • 3D models – the base map of the future. Great advances have been made in the accuracy, realism and applications of 3D models during the last 4 years. The transition from 2D to 3D mapping systems is happening faster than you think.

  • Automated processing and data extraction from aerial imagery.

These developments are the real direction of the industry and where we should be focussing more resources.

CONCLUSION

RQ-84Z AreoHawk UAV after take-off

RQ-84Z AreoHawk UAV after take-off

The UAV industry is what it is – there is no doubt that UAVs have many intriguing applications in many fields, although we have seen the existing service providers back-pedalling from things like pizza delivery or parcel delivery. At the current rate of development and with the concentration of resources being applied to the industry there is no doubt that further advances will be rapidly made.

But beware of the hype, and remember, in our industry it’s not about the platform, it’s about the sensor.  

Author: Mark Deuter, Managing Director AEROMETREX

Septentrio expands in Europe….

Septentrio expands in Europe by signing new partnership with Innovelec

Leuven, Belgium24 May 2016 – Septentrio,  a leading designer and manufacturer of GNSS solutions today announces a new partnership with Innovelec as an authorised partner for GNSS positioning solutions in the United Kingdom and Europe. This new partnership enables Septentrio’s accurate and reliable products such as AsteRx-m UAS to meet the needs of unmanned aerial systems (UAS) customers in the European market.

Based in Hemel Hempstead in Hertfordshire, Innovelec will work directly with Septentrio to offer high quality strategic services and technical expertise necessary to meet the current and future requirements of GNSS customers in the United Kingdom and UAS customers across Europe to develop new business opportunities in the market.

Since last year, Septentrio has introduced a new set of products which achieve a new benchmark for accuracy and reliably in GNSS solutions. Innovelec will supply the AsteRx product line – renowned for providing consistent and robust cm-level positioning under challenging interference and multipath environments. The AsteRx-m UAS OEM is compact and lightweight module which offers the lowest power consumption on the market at 600 mW. While the AsteRx4 is a robust dual antenna receiver ready for rapid and straightforward integration into your existing workflows or hardware.

“Septentrio’s AsteRx Product line offer unbeatable performance, accuracy and reliability in the most challenging conditions” stated Koen Gutscoven, Director of Sales at Septentrio. He continued: “Innovelec complement Septentrio’s skills to aid further growth in the UK and European market.”

“Septentrio presents an exciting opportunity for Innovelec to further develop its significant business within the GNSS market. Flexibility and support in conjunction with our partners have helped Innovelec to grow and it remains a benchmark of our operations” stated Martin Newman, Sales Director of Innovelec. “Septentrio bring a lot of expertise of the GNSS market to help us develop new sales opportunities and loyal clients for accurate and reliable positioning across the European market. “

About Septentrio:

Septentrio designs, manufactures and sells high-precision multi frequency multi constellation GPS/GNSS equipment which is used in demanding applications in a variety of industries such as marine, construction, agriculture, survey and mapping, GIS, UAVs as well as other industries. Septentrio receivers deliver consistently accurate GNSS positions scalable to cm-level, and perform solidly even under heavy scintillation or jamming. Septentrio receivers are available as OEM boards, housed receivers and smart antennas.

Septentrio offers in-depth application and integration support to make its customers win in their markets. Septentrio is headquartered in Leuven, Belgium and has offices in Torrance, CA and Hong Kong, and partners throughout the world. To learn more about Septentrio and its products, visit www.septentrio.com 

Protecting Archaeological Treasures

Protecting Archaeological Digs – UAV and Laser Scanning combined

Land Surveys were recently engaged in Western Australia to capture an Archaeological Site found in a densely vegetated property, currently under assessment as a potential mine.

Using Multi-Platform Surveying technologies, Land Surveys helped record and document the location, condition and details from the air, right down to the tools and implements found within the Archaeological dig – using non-invasive and non-disruptive Laser Scanning technologies.

Our Unmanned Aerial Vehicles (UAV’s) captured the land and terrain around the Archaeological site to provide context – highlighting how close current roads come to the Archaeological site.

Using this information, our client is now able to plan the future mine cutting to avoid disturbing this significant site – improving feasibility estimates in preserving the site and maintaining normal operations.

Land Surveys provided more detail for stakeholders by following up in using remote, non-intrusive Terrestrial Laser Scanning at the dig. Artefacts found inside the cave were scanned in-situ to record and document their size, location and material colour and texture, without directly interfering with the site.

Our deliverables from this system included 3D PDF’s of the artefacts and a specialised spherical image viewer of the site from each scan station called WebShare. WebShare allows people to view and measure any visible part of the site, with free software that can be run on any computer.

This specialist approach to the survey of Archaeological sites provides a historical “Snapshot” of the entire area and the significant items it contains. This allows for Archaeologists to inspect the site without directly accessing it, reducing impact on normal project operations in the future.

Land Surveys can include point clouds, GIS datasets, CAD point and stringline models in our deliverables as core products. By pushing the deliverables further, we can provide comprehensive 3D models for CityGML and other city model standards.

This information can be used for varying activities in the future, such as:

  1.  Recreating the site at an accessible location off the property, in order to show people the site in an educational setting
  2. Confirming over time (through resurvey) that the site remains undisturbed from mining operations
  3. Working with Archaeologists, the site can be digitally inspected and new items can be modelled when found that are of significance
  4. Exports of the data can be used to publish online of for 3D printing of the artefacts

Combining these two survey platforms enabled Land Surveys to provide a survey output that records detail from Kilometres to Millimetres, helping all stakeholders with their geospatial survey needs across the project. Our capabilities can be customised to meet your project and long-term requirements.

Land Surveys have several surveyors located across our Australian offices who operate this specialist equipment, and provide Survey Control for quality and compliance on your projects. Within tight timeframes, our surveyors captured information, placed stable survey control, and safely surveyed the site which remained undisturbed throughout the project – experience of which could benefit you in your planning and design project stages.

No Problems, Just Solutions.