Category: Space

Earthrise

24th December 1968 did change everything. What was achieved in that year hasn’t been matched. An unexpected event took place on an adventure to orbit our Moon. Now, 55-years have gone by. Enormous strides have changed lives. Technology has raced ahead. We reside on a beautiful and bountifully planet. Yet, we have continued to pump massive amounts of carbon into the Earth’s atmosphere. I wonder, does this tell us anything about human nature? If there is such a thing.

The photograph called “Earthrise” was taken while the Apollo 8 spacecraft was skimming over the surface of our Moon[1]. I don’t suppose there has ever been a more significant colour photograph in human history. As one of the astronaut’s said, he could hold his thumb up at a window and mask everything and everybody alive except for the three of them in the capsule.

The Earth appeared as a swirly blue marble set in the dark emptiness of space. The image is stark. Eyes are drawn to the lush colour and liveliness of the globe. Contrasted with the darkness and vastness of space. Clouds, oceans, and landmasses all scattered across this lonely planet. At the time of the Apolo mission there was about three and a half billion inhabitants. Today, there’s eight billion people spread across the surface of the Earth.

This image has become pivotal in our thinking. So much of our debates and discussions about the future are dominated by conflict and competition for resources. When there’s the opportunity to stand back and realise that our small homeland is shared, those tensions fade, at least a little.

Fragility and, almost irrelevance, when set against the vastness of space, is our daily reality. Illuminated by the Sun, a minor star, and in just the right place for life, so we fight and war as if humanity was at the centre of the universe. That animalistic behaviour could be the route of our downfall. Only, we are doing something else to top that persistent stupidity.

What sets Earth apart? That cultivated atmosphere. Such are the interactions going on in the first 100 kilometres above the surface of the planet that a sustained healthy atmosphere exists. It takes a quick look at the images coming back from the exploratory rovers on Mars to see how alive and miraculous Earth’s atmosphere has become.

The question is, are we the generations of humans who will permanently degrade it? Presently we are struggling with the needs and desires of the eight billons of us and the realising that a balance must be struck. For one pumping massive amounts of carbon into the Earth’s atmosphere is pure idiocy. It’s even greater idiocy when we have advanced and invented technologies that mean we don’t need to do it.

COP28 may be another step on the road to sanity but we continue to struggle with the realities of our situation. A human-made climate crisis and a dramatic increase in climate related catastrophes may wake us up. Perhaps every screen saver on the planet ought to be the Earthrise image.

POST: The first such image of the Earth seen from the Moon was taken by Lunar Orbiter 1 in 1966. It was in black and white and of poor quality.

[1] https://www.smithsonianmag.com/science-nature/who-took-legendary-earthrise-photo-apollo-8-180967505/

Another -isation

Coming across a new word kicks off some mixed feelings. What should I think? Should I be a pedant? Should I start using it right away or write to the newspapers in disgust?

This morning, I put a new word to Sue at breakfast. Her reaction was “that’s obscene”. It’s true that only one of us might be eligible or think about joining the Apostrophe Protection Society[1]. I was ambivalent towards technical colleagues making-up a new word. In this case, there’s no ambiguity in meaning. No need to explain. Chunking two ideas together is creativity – isn’t it?

I can’t go as far as to sniff at a newfound English word. Modern language must evolve. It must branch off onto fresh exotic paths. I’ve always thought the idea that there should be legislation to protect a “true” version of a langauage is as useful as hammering the nails into its coffin.

Composite words can be a delight. For one Christmas, I got a wonderful book of some of the longest German words that know no English equivalent. Naming objects or expressing combinations of circumstances in one gigantic word can be a lot of fun and surprisingly practical.

Who doesn’t like: Streichholzschächtelchen. Yes, it’s a matchbox.

Today, we talk of streaming as if that word had been around since prehistoric times but there are limits as to how we use it. For example, I’d sound strange if I said I was all streamed-up or streamed-out. My meaning being the memory on my mobile device was full of endless streamed material.

The word software[2] started its life as the name suggests. Something, like wool that was soft to ware. Say; I like this well-made winter coat. It’s good quality software. A crate in a coat makers factory might have a label with that humble word attached.

Today, no one would normally make that association. Almost since the date of my birth. And I could say the era of my birth was the beginning of the Space Age. The 1960s. Since the date of my birth, and the major part computers take in our everyday lives the term software has grown and grown. If a child of 5-years-old doesn’t know the word, there education must be wanting.

Living a sheltered existence, it’s only this morning that the word softwarisation came to my notice. Even the spellchecker and text prediction want to turn it into something else. The word does follow that simple composting convention that seems so popular, particularly amongst technical society. Assuming everyone knows what software is then it adds an ending that suggest a transformation from something into software. I’m not talking about turning a lump of cheese into software, so context is all important.

Software’s forefather, or mother was hardware. That’s the physical electronics that you can touch and hold. Loads of semiconductors and tiny circuits in our devices that are constantly taken for granted. Softwarisation is a way of saying that more and more digital device functionality is dependent on software and not physical hardware. More and more device hardware is becoming general purpose and it’s the software does the thinking. I’ll go with that. It’s happening.

PS: I didn’t use Microsoft Bing (software) to help create the above but after I’d written it I did have a look to see what it said about the subject. Help, there’s no going back.

[1] https://www.apostrophe.org.uk/

[2] https://www.etymonline.com/word/software

The Dr

There’s something wonderfully peculiar about a time traveller wandering around the universe in a British police box. Time and space are the stuff of an infinite number of story lines. But the ones who strike a cord with us most are the humancentric ones. Our home, Earth is under threat. Humanity is in peril. Nobody knows what to do. Then stepping out of street furniture from the 1960s comes a hero. Not a muscle bound, gun toting superhero with magical powers. No, an eccentric, cerebral alien who looks like a college professor who took too many happy pills in their hippy phase. Humanoid in appearance. Wherever The Doctor goes so enemies follow, set for a final showdown[1].

Iconic features of Dr Who’s[2] life echo down through our decades. The Doctor’s vehicle is nothing like H G Well imagined. With a nice trick of being bigger inside than out it dazzles all who hitch a ride. If only we could master that transformation. I for one, don’t think it’s entirely impossible. Afterall isn’t physics up to about 12 dimensions now?

No saviour of the human race is complete without uniquely bad adversaries. Strangely enough quite a few are machine-based baddies. How in the moment is that? With increasing neurosis about what machines may be capable of in the near future. Daleks look a bit crude with what we know now. Unlike the iPhone we haven’t yet seen an upgrade to a version of the Dalek 15 Pro. I dread to think what that might do. They may have a resistance to any means of destruction.

Some Science Fiction can bore with an intensely serious inspection of our planetary dilemmas. Dr Who steers clear of that trap. Injecting humour and simple everyday relationships into the stories, the level is more connectable. One person matters, as much as billions.

My Doctor is Tom Baker. As a Time Lord, he captured that frenetic, unpredictable, jumbo schoolboy who knew no bounds. Yet, he retained a masterly command of dangerous situations. He could look stern as well as overjoyed. Never did I think that he would turn to the darkside.

My favourite evil monsters are the Cybermen. The idea that machines should decide that humans would be better if they were transformed into machines is a true horror story. It a kind of malevolent evil that doesn’t know it’s evil. It’s possible to believe that could exist.

Pure fiction, mixed with a scary look at expanding technology and always a partnership between good folk to overcome despots like The Master and singularly driven uncharitable aliens. That blend makes for wonderful entertainment. Long may television, and its replacements celebrate this combination. Regeneration has no end.

Today, it’s Doctor Who’s 60th Anniversary[3]. Happy birthday.

[1] https://www.imdb.com/title/tt0056751/

[2] https://en.wikipedia.org/wiki/Doctor_Who

[3] https://www.doctorwhotv.co.uk/doctor-who-is-60-today-99309.htm

UAP

….none of us are familiar with the variety in shape and size of flying machines currently being designed and developed for general use

There was a time when anyone raising the issue of the potential for an asteroid to send humans back to the stone age was mocked and derided. Anyone bringing apparent sci-fi plots into Parliament was jeered. Now, the subject is studied with intensity and considerable resources. The probabilities of Near-Earth Object[1] (NEO) impact is calculated, and small asteroid and comet orbits are monitored in detail.

Really bad films, like the one starring Bruce Willis have a lot to answer for. That space between fiction and reality gets filled with more than a few eccentrics and conspiracy theories. Trouble is that gives you, and me licence to smirk anytime cosmic occurrences come into discussion.

I must admit I like the term Unidentified Anomalous Phenomena (UAP) better than UFO. They are airborne phenomena, they are unidentified until we know better, and they are anomalous. Although, most reports are attributed to things that are known, even if they are rare events. Some are pooly reported and only scant evidence is avialable.

Discovering all there is to know about such airborne phenomena is a matter of both safety and security. However remote it might seem, part of this is the safety of aircraft in flight. I know of no examples of extra-terrestrial objects colliding with aircraft but it’s not impossible. I’m reminded of that classic picture of a bullet hitting a bullet in-flight and fusing together. It’s from the Battle of Gallipoli.

We might be entering a new era of transparency in the scientific study of UAP. This is a wholly good thing and highly necessary given the coming expansion in the number of air vehicles in flight. If Advanced Air Mobility (AAM) is going to do anything, it’s going to led to an increase in aviators and public reports. For one, none of us are familiar with the variety in shape and size of flying machines currently being designed and developed for general use. It’s likly that red and green lights moving through the sky at night is going to prompt public reports of the “unknown”.

Perspective plays a part too. A small drone close can look like a large airship at distance. As environmental conditions change so the perception of airborne objects can change dramatically. So, what we might observe and confidently attribute to be a drone or helicopter or aircraft in-flight is not always definitive. Applying disciplined scientific analysis to the data that is available has benefits.

Given that our airspace is likely to become ever more crowded, NASA’s study[2] of UAP has much merit. Recognising that resources are needed for this work is a lesson most nations need to learn. We can sit on our hands or giggle at the more ridiculous interpretations of observations, but this kind of reporting and analysis will be advantageous to aviation safety and security. It’s part of giving the public confidence that nothing unknown, unmanaged or uncontrolled is going on abover their heads too.

POST: UFOs: Five revelations from Nasa’s public meeting – BBC News

[1] https://neo.ssa.esa.int/home

[2] https://www.youtube.com/watch?v=bQo08JRY0iM

Comms

The long history of data communications between air and ground has had numerous stops and starts. It’s not new to use digital communications while flying around the globe. That said, it has not been cheap, and traditional systems have evolved only slowly. If we think Controller Pilot Data Link Communications (CPDLC)[1] is quite whizzy. It’s not. It belongs to a Windows 95 generation. Clunky messages and limited applications.

The sluggishness of adoption of digital communications in commercial aviation has been for several reasons. For one, standardised, certified, and maintainable systems and equipment have been expensive. It’s not just the purchase and installation but the connection charges that mount-up.

Unsurprisingly, aircraft operators have moved cautiously unless they can identify an income stream to be developed from airborne communication. That’s one reason why the passengers accessing the internet from their seats can have better connections than the two-crew in the cockpit.

Larger nations’ military flyers don’t have a problem spending money on airborne networking. For them it’s an integral part of being able to operate effectively. In the civil world, each part of the aviation system must make an economic contribution or be essential to safety to make the cut.

The regulatory material applicable to Airborne Communications, Navigation and Surveillance (CS-ACNS)[2] can be found in publications coming from the aviation authorities. This material has the purpose of ensuring a high level of safety and aircraft interoperability. Much of this generally applicable material has evolved slowly over the last 30-years.

Now, it’s good to ask – is this collection of legacy aviation system going to be changed by the new technologies that are rapidly coming on-stream this year? Or are the current mandatory equipage requirements likely to stay the same but be greatly enhanced by cheaper, faster, and lower latency digital connections?

This year, Starlink[3] is offering high-speed, in-flight internet connections with global connectivity. This company is not the only one developing Low Earth Orbit (LEO)[4] satellite communications. There are technical questions to be asked in respect of safety, performance, and interoperability but it’s a good bet that these new services will very capable and what’s more, not so expensive[5].

It’s time for airborne communications to step into the internet age.

NOTE: The author was a part of the EUROCAE/RTCA Special Committee 169 that created Minimum Operational Performance Standards for ATC Two-Way Data Link Communications back in the 1990s.

POST 1: Elon Musk’s Starlink Internet Service Coming to US Airlines; Free WiFi (businessinsider.com)

POST 2: With the mandate of VDLM2 we evolve at the pace of a snail. Internet Protocol (IP) Data Link may not be suitable for all uses but there’s a lot more that can be done.

[1] https://skybrary.aero/articles/controller-pilot-data-link-communications-cpdlc

[2] https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-airborne-communications-navigation-and

[3] https://www.starlink.com/

[4] https://www.esa.int/ESA_Multimedia/Images/2020/03/Low_Earth_orbit

[5] https://arstechnica.com/information-technology/2022/10/starlink-unveils-airplane-service-musk-says-its-like-using-internet-at-home/

Just H

What is the future of Hydrogen in Aviation? Good question. Every futurologist has a place for Hydrogen (H) in their predictions. However, the range of optimistic projections is almost matched by the number of pessimistic ones.

There’s no doubt that aircraft propulsion generated using H as a fuel can be done. There’s a variety of way of doing it but, the fact is, that it can be done. What’s less clear is a whole mass of factors related to economics, safety and security and desirability of having a hydrogen-based society.

H can be a clean form of energy[1], as in its purest form the process of combustion produces only water. We need to note that combustion processes are rarely completely pure.

It’s an abundant element but it prefers to be in company of other elements. Afterall, the planet is awash with H2O. When H is on its own it has no colour, odour, or taste. In low concentrations, we humans could be oblivious to it even though there’s a lot of it in the compounds that make us up.

Number one on the periodic table, it’s a tiny lightweight element that can find all sorts of ways of migrating from A to B. Ironically, that makes it an expensive element to move around in commercially useable quantities. H is often produced far away from where it’s used. For users like aviation, this makes the subject of distribution a fundamental one.

Part of the challenge of moving H around is finding ways of increasing its energy density. So, making it liquid or pumping it as a high-pressure gas are the most economic ways of using it. If this is to be done with a high level of safety and security, then this is not going to come cheap.

There are a lot of pictures of what happens when this goes wrong.  Looking back at the airships of the past there are numerous catastrophic events to reference. More relevantly, there’s the space industry to look at for spectacular failures[2]. A flammable hydrogen–air mixture doesn’t take much to set it off[3]. The upside is that H doesn’t hang around. Compared to other fuels H is likely to disperse quickly. It will not pool on the ground like Kerosene does.

In aviation super strict control procedure and maintenance requirements will certainly be needed. Every joint and connectors will need scrupulous attention. Every physical space where gas can accumulate will need a detection system and/or a fail proof vent.

This is a big new challenge to aircraft airworthiness. The trick is to learn from other industries.

NOTE: The picture. At 13:45 on 1 December 1783, Professor Jacques Charles and the Robert brothers launched a manned balloon in Paris. First manned hydrogen balloon flight was 240 years ago.

[1] https://knowledge.energyinst.org/collections/hydrogen

[2] https://appel.nasa.gov/2011/02/02/explosive-lessons-in-hydrogen-safety/

 

High ALT

Normal commercial air traffic control doesn’t go beyond 60,000 ft in altitude. That makes sense since civil flying activities have been limited to lower altitudes. In fact, modern commercial airliners are not designed to fly above about 45,000 feet. This is a compromise based on what works commercially as much as what’s works best. Aircraft instruments are calibrated making standard assumption about the atmosphere.

For some of its flight, Concorde cruised at a height of 60,000 feet. More like a military jet, with its speed it had the capability to make use of higher altitudes.

It’s even possible to fly above 50,000 feet without an engine. The world record glider flight by AIRBUS shows it’s possible.

The Earth’s atmosphere is not uniform. It changes its characteristics with altitude. The atmosphere can be divided into five layers, as the temperature and density change. They are named: Troposphere, Stratosphere Mesosphere, Ionosphere and Exosphere. 

The Troposphere is a layer that goes from 8 kms (26,247 ft) on the poles to about 18 kms (59,055 ft) on the equator. This is the layer where weather is experienced.

On average, the Stratosphere goes up to about 40 kms (131,234 ft). The winds blows fast but they tend to be more consistent as they wrap around the globe. The lower portion of the Stratosphere is virtually isothermal (layer of constant temperature). 

A medieval English philosopher and Franciscan friar, Roger Bacon[1] figured out that the air might support a ship in the same way that water supports ships. In the 13th Century that was a nice academic conclusion but little more.

With all the current controversy surrounding high altitude balloons, that the road to flight started with balloons, could be said to be a bit ironic. It’s long been known about that balloons fly well at high altitudes but it’s a new frontier as far as commercial activity is concerned. For science, weather balloons may go up to 40 km to measure the high level winds.

Some experimental work has been done on trying to commercially use the airspace above normally civil flying. The Google Loon trials[2] are an example of an attempt to float a telecommunications platform high in the sky. These balloon trials were abandoned as difficulties proved greater than anticipated.

It’s not so easy to keep a high altitue balloon on-station.

Now, considering the news in North America, maybe high-altitude operations ought to be a matter of regulatory concern. This is not a subject that any one country can address alone.

There is some legal, regulatory and technical work[3] underway in Europe[4] but it needs to make progress. This is a subject for international collaboration. 

[1] https://en.wikipedia.org/wiki/Roger_Bacon

[2] https://blog.x.company/loons-final-flight-e9d699123a96

[3] https://www.eurocontrol.int/article/echo-making-space-new-high-altitude-entrants

[4] https://www.eurocontrol.int/events/european-higher-airspace-operations-symposium

UFO

It’s intriguing. Reports of unidentified flying objects being shot down over Alaska, Canada, and Michigan prompts a lot of questions.

The Earth’s atmosphere eventually becomes space at 100 km up. The Kármán line[1] is one way to define the boundary. All aeronautic activities are deemed to take place below that imaginary line. Theodore Karman[2] did his best to determine a height at which the Earth’s atmosphere is too thin to support flight. Now, there’s an international discussion about bringing that boundary down to 80 km. That is the hight above which a person in a space vehicle is said to become an astronaut.

I guess my point is that there’s a lot of the Earth’s atmosphere to continuously monitor, if the task is to know about everything that is flying everywhere. So, it’s perfectly reasonable that reports of unidentified flying objects will crop up, now and then.

It doesn’t mean that there are alien probes popping in to keep an eye on us earthlings. No, in so far as is commonly known there’s no evidence that stands up to scrutiny to definitively prove the existence of sustained airborne craft that are not of this Earth. However, extra-terrestrial objects fall to Earth all the time. Mostly ice and rocks. I wrote about objects falling from the sky in an earlier article.

It’s worth recalling the first article of the Chicago Convention on Sovereignty:  

The contracting States recognize that every State has complete and exclusive sovereignty over the airspace above its territory.

For those monitoring what’s in the air, the primary concern remains about flights over land and populated areas. This is the case where hazards can exist to those below.

All said and done, it’s no time to become alarmed. It may well be the case that these unidentified flying objects were previously ignored. Only now has the militaries in North America been galvanised into action and being more vigilant. The more people look, the more people see.

What do I know? Spy balloon, craft and drones may be much more common than has been generally reported.

Claims and counter claims that everyone is doing it shouldn’t be dismissed out of hand. The technology involved in flying above normal air traffic has a multitude of potential applications. A framework for higher altitude operations is now being written[1].

POST: Diplomatic tensions between the US and China continue to escalate as the US explains its shooting down of high altitude flying objects over North America. Much is still to be uncovered.

[1] https://www.eurocontrol.int/article/echo-making-space-new-high-altitude-entrants

[1] https://www.fai.org/news/statement-about-karman-line

[2] A Hungarian American physicist and engineer who was born 11 May 1881.

Apprenticeships

What do you think are the reasons behind the overall decline in engineering apprenticeship starts in recent years? We are particularly interested in understanding more about supply and demand.

What do you think are the reasons behind the overall decline in engineering apprenticeship starts in recent years? We are particularly interested in understanding more about supply and demand.

Image. It persists even now. In fact, the paper[1] that asks these questions has images of spanner turning. It’s so easy to pick royalty free pictures that pop-up from search engines searches. These images show mechanics in blue overalls. Don’t get me wrong, this is not the least bit disrespectful of spanner turning.

A deep cultural memory persists. It has multiple elements. You could say, in part, industrialisation, still conjures up images of dark satanic mills contrasted with grand country homes of a class of business owners. Basically, dirty, and clean as two key words.

The Victorians did a great deal to both elevate engineering personalities, like Brunel[2], but to hold them as different or apart from the upper middle-class society that the fortunate aspired to join. Those who forged the prosperity of the age had to work hard to be accepted in “society”.

Today, it makes no difference that’s it’s American, popular comedies like “The Big Bang Theory[3]” entertain us immensely but pocket the “nerd” as eccentric, peculiar and unfathomable. I admit this is attractive to a proportion of young people but maybe such shows create exclusivity rather than opening people’s eyes to possibilities.

Having Government Ministers standing=up can calling for Britan to become a version of Silicon Valley doesn’t help. Immediately, that signal is heard from those in authority, young people switch “off”. To boot, the image conquered up is a whole generation out of date. We have the Windows 95 generation telling the iPhone generation what’s the best direction to get to the 2030s.

Here’s a proposition – you must see yourself as an “engineer” to become an engineer. That can be said of a whole myriad of different professions. Each with a common stereotype. Look at it the other way. If you cant’t see yourself as a person who can shape the future, it isn’t likely you will choose engineering.

My observation is that we need to get away from too many images of activities. In other words, this is an engineer at work. This is what they do. This is what they look like. What we need to address is the touchy-feely stuff. Let’s consider how young people feel about the world they have inherited from my generation.

A high level of motivation comes from the wish to make changes and the feeling that it’s possible to make changes. That the skills picked-up as an apprentice will help you shape the future. Engineering is part of making a better world.

[My history is that of an Engineering Industry Training Board (EITB) apprentice who started work in 1976.]

[1] https://www.engineeringuk.com/media/318763/fit_for_the_future_knight_and_willetts_apprenticeship_inquiry_euk_call_for_evidence.pdf

[2] https://en.wikipedia.org/wiki/Isambard_Kingdom_Brunel

[3] https://www.imdb.com/title/tt0898266/

Pulp

Eyes wide open in astonishment. I saw a supermarket newsstand. That’s not new. From time to time, I find it better to scan the daily headlines rather than buying a newspaper. Frankly, in the world of social media and search engines the sane and sober daily national newspapers are too expensive. They only make sense on a Sunday when there’s time to take in what they have to say.

It’s a moribund marketplace. British daily newspapers are in slow decline. Nevertheless, each title has a readership that remains loyal even if it’s declining in numbers. Before the mobile phone took so much of our attention time it was important to consider who reads the papers. As a sketch from the BBC comedy “Yes, Prime Minister” nicely put it[1].

I have an admiration for those who can transform difficult technical material into everyday language. That kind of communication skill is much needed and often undervalued. Taking simple words and sentences and telling a story that makes knowledge accessible, well that’s rare.

The newspaper headline that caught my eye was “It’s a space burp, Jim, but not as we know it.” Topped by “Earth facing solar blast as powerful as a billion nukes”.

This is wonderful example of how to turn real science into pulp and mush. I might be the only one who picked up the Daily Star, some irony there I think, and thought this thought. What a way to highlight a story about the sun. No, not The Sun but the sun that’s 93 million miles away.

There are some great people in the National Oceanic and Atmospheric Administration in the US who run a space weather prediction centre[2]. Their website is a place to go if you want to know where to see the northern lights at a particular time and place. On Monday 9 January, there was a solar flare that may have affected radio transmissions in South America. That’s useful to know if you are on a ship using High Frequency (HF) radio communications in that part of the world.

“Earth could soon be in the firing line of a massive solar storm with the power of billion hydrogen bombs” is certainly an interesting and rather scary way of putting it. What the readership of The Star should do about this suggested calamity is not explained.

The Sun is restless, powerful, and essential to life on Earth. It’s prudent to keep a watchful eye on what it does. There’s no doubt that it can cause havoc on extremely rare occasions. We are now more vulnerable than past generations given our dependence on extensive electronic communications.

The Sun runs on an 11-year cycle. I don’t think anyone knows why that happens, but it does. We are coming out of the quiet part of the cycle so there’s likely to be more reports on this subject. Solar flares, like massive earthquakes and volcanic eruptions are difficult to predict. Our ability to warn of a once in a 5000-year event is fragile.

Perhaps this story is a hopeful wish of a newspaper editor. We will put down our broken mobile phones and pick-up newsprint once again. I wonder?

[1] https://youtu.be/DGscoaUWW2M

[2] https://www.swpc.noaa.gov/