Spotting leaky pipes from orbit

PRIVATE utility Anglian Water, which supplies water services to around seven million people across eastern England and is under pressure to cut back on excessive wastage from leaky pipes, is turning to out-of-this-world technology for help.

The Huntingdon-based company is using space age technology, originally developed to detect water lying below the surface of Mars, the red planet, to locate hard to find underground leaks. Information gathered by the latest Earth-orbiting satellites is crunched by specialist computer algorithms and then turned into images as a way of helping engineers solve the costly environmental problem.

The system was first created to detect water on Mars and pioneering space firm Asterra is now redeploying its space know-how to help utility companies like Anglian Water solve a long-standing problem.

“It’s not just water that is wasted by leaking pipes – every drop also represents a substantial emission of carbon,” says founder and chief technology officer of the London and Tel Aviv-based company, Lauren Guy.

Anglian Water admits it loses 182 million litres of water per day across its network, an equivalent leakage of approximately 16-18 percent when compared to the amount of water running through the network each day.

“We recently used the Asterra technology to pinpoint some significant leaks that would never have been identified due to the relatively low percentage loss”, a company spokesperson said.

“These non-visible, underground leaks were in remote areas and would never have been reported by a customer, or indeed found using traditional detection sweeps.

“They often run through agricultural and rural farmland where traditional detection, or even smart distribution leakage technology, is difficult to use due to the lack of fittings and the sheer geographical size of an area.”

The water firm says the Asterra expertise allows it to use satellite data to detect leaks from otherwise difficult-to-inspect transfer pipes and trunk mains right across its system.

Before space technology stepped in, staff from water utility companies had to ‘walk the line’ in search of leaks, often manually inspecting mile upon mile of pipes each day in the hope of catching the sound of trickling water.

More modern techniques, such as installing acoustic sensors to listen automatically for leaking pipes are effective but can only cover limited areas before becoming cost prohibitive. Planetary scientists searching for the holy grail of Martian water then realised that orbiting spacecraft with special radar sensors could be used to spy out water lying below the red planet’s surface.

Asterra’s adaptation of this space-based solution for terrestrial use came after Guy realised that if satellite technology could locate water under the surface of Mars it could also be used to help track down water leakages closer to home. His discovery was made possible by sensors known in the space business as Synthetic Aperture Radar (SAR), which are used on many of the latest low Earth orbit (LEO) satellites and can peer through cloud and below Earth’s surface.

L-band SAR uses the motion of a radio antenna to build up images which typically cover areas of around 3,500 square km at a time. It works by transmitting radio frequency waves and recording what is reflected to the receiver, revealing details on the nature of the reflective material, including the moisture content of soil.

Asterra’s breakthrough relies on sophisticated data processing using proprietary geophysical modelling and analysis. “It allows us to pick up the signature of leaking water in densely populated urban areas packed with interferences to SAR imaging”, explains Guy. “The observations are much more than high-quality images and, since perfecting the art of extracting a signal from the noise, we can provide game-changing insights to the water industry.”

All this means city and county-wide systems for transporting drinking water and wastewater can be more easily analysed to identify subsurface leaks that otherwise go undetected. (See satellite image from JAXA at top of article with blue lines showing water pipes and yellow dots “points of interest” where satellite data indicates a leak).

“It goes without saying that if leaks can be plugged, then the volume of water saved can amount to an entirely new water source and the requirement to drill new wells, raise dams or invest in expensive desalination plants is significantly reduced,” says Guy.

“Cleaning, treating, pumping and distributing water is an energy-intensive process, and any water going to waste represents unnecessary greenhouse gases pumped into the atmosphere. Our mission is to help water infrastructure companies improve the distribution of clean water and cut back on waste.”

 Editor's note: an original version of this article was published on Central Bylines.

Satellites lost in UK launch failure

AN INVESTIGATION has been launched after an attempt to make space history by launching satellites from British soil for the first time has ended in failure due to an anomaly in the second stage of Virgin Orbit’s LauncherOne rocket.

After successfully taking off from the runway at Spaceport Cornwall and travelling to the designated drop zone, Cosmic Girl, the customized 747 Jumbo Jet that serves as the LauncherOne system's carrier aircraft, successfully released the rocket.

The rocket ignited its first stage engines, quickly going hypersonic and successfully reaching space. The flight then continued through successful stage separation and ignition of the second stage but at some point during the firing of the rocket's second stage engine, and with the rocket travelling at a speed of more than 11,000 miles per hour, the system experienced an anomaly which prematurely ended the mission.

The first stage burns for around three minutes before reaching main engine cutoff (MECO) and stage separation occurs some three seconds later. The second stage’s NewtonFour engine ignites four seconds after separation to begin the first of two planned burns.

The payload fairing separates from the nose of LauncherOne about 20-30 seconds after second stage ignition. The first burn was to last about five and a half minutes, ending with second stage engine cutoff 1 (SECO-1). With this complete, the second stage would enter a coast phase, performing a barbecue roll to help manage thermal conditions.

Around the D+47 minute mark in the mission, the second stage was planned to begin to reorient itself to make its second burn. This burn would have commenced about six and a quarter minutes later, with the burn lasting a few seconds to circularise the orbit. Payload deployments were expected to begin about a minute after the end of the second burn.

A Virgin Orbit spokesperson said: “Though the mission did not achieve its final orbit by reaching space and achieving numerous significant first-time achievements, it represents an important step forward.

“The effort behind the flight brought together new partnerships and integrated collaboration from a wide range of partners, including the UK Space Agency, the Royal Air Force, the Civil Aviation Authority, the US Federal Aviation Administration, the National Reconnaissance Office, and more, and demonstrated that space launch is achievable from UK soil.”

The company said that out of five LauncherOne missions carrying payloads for private companies and governmental agencies, this is the first to fall short of delivering its payloads to their precise target orbit.

Earlier in the evening the Start Me Up mission had got off to a seemingly perfect start as Cosmic Girl - which had previously only been launched from its Calfornia base the Mojave Air & Space Port - took off from Newquay Airport in Cornwall on the south west coast of England.

On a cold and windy night, it was cheered on by around 2000 spectators who had been lucky enough to receive tickets to witness the start of the mission from special viewing areas at the airport and on giant screens. The plane took off precisely on time at 1701 EST (2201 GMT) Monday (January 9, 2023).

Piloted by Sqn Ldr Matthew Stannard, a Royal Air Force test pilot, it headed out over the Atlantic to the south west of Ireland to reach a height of 35,000 ft (10,700 m) where it performed a ‘race track’ manoeuver before releasing LauncherOne.

The two-stage, expendable launch vehicle is designed to place small satellites of up to 500 kg (1,100 lb) into a wide range of low Earth orbits (LEO). Rather than launching from the ground like a conventional rocket, it is carried to launch altitude by the 747 aircraft which has its own mission control room in the plane's former Premium & Economy cabin.

Among the nine satellites onboard were the UK's Ministry of Defence, the sultanate of Oman, the US National Reconnaissance Office and British startups including the Welsh company Space Forge, which is developing reusable satellites. All were lost before reaching orbit and are likely to have burnt up in Earth’s atmosphere.

Dan Hart, Virgin Orbit CEO, said: "While we are very proud of the many things that we successfully achieved as part of this mission, we are mindful that we failed to provide our customers with the launch service they deserve.

“The first-time nature of this mission added layers of complexity that our team professionally managed through; however, in the end a technical failure appears to have prevented us from delivering the final orbit. We will work tirelessly to understand the nature of the failure, make corrective actions, and return to orbit as soon as we have completed a full investigation and mission assurance process."

The UK-launched mission - titled Start Me Up in honor of the Rolling Stones' 1981 hit - brought timely publicity to the emergence of a competitive small-launch sector, just as Europe grapples with reduced launch capability due to the Ukraine war, which has cut access to Russian Soyuz vehicles, as well as Ariane 6 delays and the grounding of Vega rockets after a failed launch last month.

Matt Archer, director of commercial spaceflight at the UK Space Agency (UKSA), said he was hugely disappointed that the mission had not been successful but still pleased that the first launch of satellites from Europe had taken place from British soil.

“We don’t know what caused the anomaly but we achieved a launch,” he added. “A lot of positives have been achieved but space is hard and we knew that this had a risk of failure because launches don’t always work. But we’ve created the conditions for launch here. We’ve shown we can do it and we’ll look to do it again.”

Spaceport Cornwall received the United Kingdom’s first-ever spaceport license from the UK Civil Aviation Authority (CAA) in November and in late December Virgin Orbit was issued launch and range control licenses, which ensured all regulatory, safety and environmental requirements had been met.

Expressing her own disappointment, Melissa Thorpe, head of Spaceport Cornwall, said: “We put our hearts and soul into this and it is absolutely devastating. But this isn’t the first time we’ve been knocked but this is definitely the biggest definitely. We’re a resilient team and we’ll get up and we’ll go again.”

Virgin Orbit’s previous four operational launches, which all lifted off from California, were all successful and had deployed a total of 33 small satellites. Despite its latest failure to orbit satellites on Monday night, the mission notched up a number of space firsts including the first orbital launch from the United Kingdom, the first international launch for Virgin Orbit, and the first commercial launch from western Europe.

The idea of releasing a rocket from a converted jetliner was pioneered by Orbital Sciences in the 1990s as a novel way of offering a flexible and low-cost route to orbit as the demand for sending small satellites into low Earth orbit grows exponentially.

Chris Larmour, CEO of UK-based rocket company Orbex, said: “Space is never easy, so we were sorry to learn that Virgin Orbit's first horizontal orbital space launch from the UK did not go as planned. We know how much time, effort and energy must have been invested to deliver that launch attempt, and we wish them well for their next mission.

“The Orbex team is fully focused on introducing the UK to vertical orbital launches with the debut of our UK-built environmentally-friendly rocket, Prime. We will be launching from our own pad at Sutherland Spaceport in Scotland in the near future.”  

Editor's note: Original versions of this article were published by Spaceflight Now and ROOM Space Journal.