Tag Archives: ariel

[Apr. 30, 1962] Common Practice Period (April Spaceflight Round-up)

by Gideon Marcus

The radio plays Classical music on the FM band now. 

The difference is palpable.  Bach and Mozart on the AM band were tinny and remote.  It was almost as though the centuries separating me and the composers had been attenuating the signal.  This new radio band (well, not so new, but newly utilized) allows transmissions as clear as any Hi-Fi record set could deliver. 

Don’t get me wrong; I still listen to the latest pop hits by The Shirelles and The Ventures, but I find myself increasingly tuned into the local classics station.  The sound, and the selections, are just too good to ignore.  The last movement of Robert Schumann’s Symphony #1, with its stirring accelerando is playing right now, and it is a fitting accompaniment for the article I am currently composing.

Time was I would write an article on a space mission about once a month.  This wouldn’t be a wrap-up, but an article devoted to a single satellite.  But the pace of space launches has increased – there were two successful orbital flights in 1957, nine in 1958, 13 in 1959, 20 in 1960, 38 in 1961.  There were six flights just last week.  Either I’m going to have to start abbreviating my coverage, or I’ll need to start a satellite (no pun intended) column. 

But that’s a decision for next year.  Right now, with a bit of musical texturing, let me tell you all about the exciting things that happened in spaceflight, April 1962:

Quartet in USAF Minor

Late last year, President Kennedy put a lid on all military space programs, classifying their details.  This was a break from Ike’s policy, which was to publicize them (more or less accurately).  I think Eisenhower’s idea was that any space shot was good for prestige.  Also, if we were upfront about military flights, maybe the Soviets would follow suit.

The current President has decided that discretion is the better path.  So even though I have it on good authority that four boosters took off from Vandenberg Air Force Base in California (it being rather hard to hide a blast of that magnitude, and the papers are still reporting on them as best they can), I couldn’t tell you exactly what was at the tips of those rockets.  It’s a fair bet, however, that three of them were reconnaissance satellites, snapping photos of the USSR from orbit.  The last was probably a nuclear missile launch detector called MIDAS.  That’s make it the 5th in the series. 

Quartet in USSR Minor

Meanwhile, the Russians, who had not reported any spaceflights since Comrade Titov’s flight last summer, suddenly threw up four probes in about as many weeks.  The missions of “Kosmos” 1-4 were “to study weather, communications, and radiation effects during long space flights in preparation for an eventual manned landing.”

That sounds good, but while the first three satellites are still up in orbit returning scientific data, the fourth, launched four days ago, landed three days later – after passing over the United States several times.  All we know about it was it was launched from “a secret base” and “valuable data [was] obtained.”  Given that Kosmos 4’s mission plan bore a striking resemblance to that of our Discoverer capsule-return spy sats, I suspect the first three Kosmos shots were a flimsy camouflage.  What’s interesting here is that the Communists feel it necessary to construct a cover-up.  But the fact is, they just can’t hide when they launch things into space, any more than we can. 

Solo for English Horn

The first UK satellite, Ariel 1, was successfully launched on April 26, 1962 atop an American Thor Delta booster.  The little probe will investigate the Earth’s ionosphere.  You can read all about this mission in Ashley Pollard’s recent article.

Mooncrash Sonata

It’s two steps forward, one step back for NASA’s ill-starred (“mooned?”) Ranger program.  Thrice, the lunar probe failed to fly due to a balky Atlas Agena booster.  This time, Ranger 4, launched April 24, 1962, was hurled on a perfect course for the Earth’s celestial companion.  The trajectory was so perfect that the craft didn’t even require a mid-course correction.

Of course, it wouldn’t have mattered if it had.  Upon leaving the Earth, it quickly became apparent that Ranger 4 was brain-dead.  It issued no telemetry, nor did it respond to commands.  NASA dispiritedly tracked the probe’s 64-hour trip to the moon, which ended in its impact on the far side. 

Heart-breaking, but it is a sort of semi-victory: At least the rocket works now, and the United States as finally caught up with the Soviets in another aspect of the Space Race (just two-and-a-half years late…)

Saturn (fortissimo)

Speaking of successful rockets, the tremendous Saturn I had another successful test on April 25, 1962.  Like the first, the upper two stages were inert, filled with water for ballast.  This flight has a twist, however.  After the first stage had exhausted its fuel, the dummy stages were detonated and the ensuing watery explosion observed.  This “Operation Highwater” was designed to demonstrate how far the debris of a booster blast would travel.  I imagine it was also a lot of fun.

I have to wonder about the future of the Saturn I.  It has already been determined that the Apollo moon craft will be launched by the much more powerful and generally unrelated Saturn C-5 and Nova boosters.  It seems that the Saturn I is something of a technological dead end, though I’m sure they are at least perfecting their heavy booster launch techniques.

Prelude, Symphony #2

The National Aeronautics and Space Administration is planning another Mercury one-person shot for next month.  It will be an exact duplicate of John Glenn’s February flight, down to the three-orbit duration.  To be piloted by Navy aviator Scott Carpenter (the hunkiest of the Mercury 7), the main purpose of the mission is to make sure that the errors that plagued Glenn during his flight are fixed before the little spacecraft takes on longer journeys.  And, of course, then we will have caught up with the Russians in another way – we’ll have had two men orbit the planet.

No doubt, Carpenter’s flight will be the spaceflight highlight of next month; I have not seen any other missions announced.  Then again, the Reds might have a surprise that’ll have us singing a different tune…

[April 22, 1962] “To ride on the curl’d clouds” (ARIEL ONE)

By Ashley R. Pollard

Looking back to October the 4th 1957 when Sputnik was launched, it’s hard to believe that only five years have passed since that fateful day when Russia beat Britain and America into space (perhaps my American readers will say that Britain had no realistic chance of getting into space first, which I would agree with, but for the Western nations to be beaten by the Russians – now that’s the thing.)

With Sputnik, humanity transitioned from flying through the air to moving through the vacuum of space, where no living animal can survive without a pressure suit. The only other time that I can think of when a paradigm shift of this nature took place would be back when the first hot-air balloons were invented. This provoked the discussion, at the time, that this was the invention of travelling through the air.

As I read the history of hot-air balloons, the idea of travelling through air as an invention seems odd to me. But as language evolves over time, so do concepts like invention, which has moved from the original Latin meaning of discovery to the more modern meaning of a process or device. Though by modern I should clarify that I mean “from the fifteenth century,” which is not surprising given the changes that arose from the Renaissance, and everything that came out of rediscovery of the knowledge of the ancient Greeks.

For those who look back on the past with rose-tinted glasses I will remind my readers that the times I’m writing about were surrounded by their own troubles. The Turkish conquest of Constantinople in 1453, for example, which led to a westward exodus of Greek scholars that fuelled the rediscovery of ancient thinking. One can argue that today’s troubles, with West and East facing off against each other, is just part of the story of humanity’s struggle between its biological drives versus its intellectual aspirations.

Almost equidistant (physically, though not ideologically) from the Free and Communist worlds, Britain is about to become Earth’s third nation to practice the “invention” of travelling through space. Admittedly this puts us behind America and Russia, but as the Yanks are wont to say, this still makes us a contender. We are calling our satellite Ariel One, more prosaically referred to as UK-1 or S-55. This program grew out of proposal by the British National Committee on Space Research to NASA that came from a discussion at a meeting of the Committee on Space Research (COSPAR) to study the Earth’s ionosphere.

What is the ionosphere? It is that layer high up in the Earth’s atmosphere where the sun’s energy strips the thin air of its electrons, creating a charged barrier to radio waves. It is this layer that allows British and American “Hams” to talk to each other across thousands of miles of ocean. Understanding how the ionosphere works not only has practical implications for engineers, but is also vital to modelling the atmosphere as a whole. The rewards to science will be tremendous.

I must confess that while Ariel One may be a British satellite, it was made in America for us by the NASA Goddard Flight Center. Our satellite will launched atop a Thor-Delta rocket aka Delta DM-19, which is a variant of the Thor-Able booster that launched some of America’s first satellites, and is due to be launched on the 26th of April from Cape Canaveral Air Force Station, Launch Complex 17A.

The Thor rockets were designed for the United States Air Force as intermediate range ballistic missiles (IRBM), which became redundant for purpose after the introduction of the Atlas intercontinental ballistic missile (ICBM). So arguably this is a case of swords being turned into plowshares for science. The Thor-Delta uses a Delta rocket as its upper stage, which has the new AJ10-118 engine, and the upper stage also has cold gas attitude control jets. This allows rockets to be stabilized, and the motors can also be stopped and restarted for more precise orbital insertions than were previously possible.

The Ariel One satellite has six experiments onboard, five of which will examine the relationship between two types of solar radiation and changes in the Earth’s ionosphere, and the other cosmic rays. University College London has two ionospheric experiments aboard Ariel; a Langmuir probe for measuring of electron temperature and density; and a spherical probe for measurement of ion mass composition and temperature. The University of Birmingham has a plasma dielectric constant measurement of ionospheric electron density device, which uses a different method to measure electron density that complements the Langmuir probe.

In addition, University College London has two solar radiation experiments; one will measure Lyman-Alpha ultra-violet emissions; the other will measure X-Ray emissions from the Sun in the 3 to 12A band. The sixth experiment, provided Imperial College London, is a Cerenkov detector, which will measure primary cosmic ray energy spectrum, and the impact of interplanetary magnetic field modulation on this spectrum.

You may be thinking, “These experiments sound familiar. I know that NASA’s Orbiting Solar Observatory, for example has similar detectors. Why do we need another satellite that does the same thing?”

That’s an excellent question. There are three answers:

1) Just as more eyewitnesses create a stronger legal case or journalistic report, so do multiple satellites give a broader, mutually verifiable view of the same phenomena;

2) Different laboratories create subtly different experiment types. Thus, Ariel will look at the Sun with slightly different eyes than OSO;

3) Ariel represents an important first step in British space science, one that lays the foundation for future successes.

To finish this months article I must comment on the name Ariel, which is an interesting choice. Ariel is a Hebrew word found in the Bible. I understand it means either the Lion of God or Hearth of God, depending on interpretation. It is also the name of one of the moons of Uranus (recently visited by other members of the Journey).

But, one can’t help but think of Milton’s Paradise Lost or Shakespeare’s The Tempest, and my guess would be that it’s an allusion to the latter because Ariel was the servant of Prospero – and I have the highest hopes that Ariel One shall be successful in serving British science equally well.