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Science / Space Race

[April 6, 1965] The Early Bird Catches the Worm (INTELSAT 1)

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by Kaye Dee

Later today, the International Telecommunications Satellite Organization, better known as INTELSAT is going to launch its first satellite, INTELSAT-1, which goes by the nickname of ‘Early Bird’. This satellite is intended to be the beginning of a global satellite telecommunications network, which INTELSAT hopes to have in operation by about mid-1967.


INTELSAT aims to connect us all via satellite – starting with the US and Europe

INTELSAT: Connecting the World with Space Technology

I wrote about INTELSAT last year, when the organization was first established in August 1964, with Australia as one of its 11 founding members. Around 45 countries have now joined the INTELSAT consortium and I’m certain that the creation of a world-wide telecommunications system that offers equitable access to all nations will improve international understanding and the prospects for world peace. Satellite communications will certainly prove a boon for countries with poorly-developed internal communications networks, as well as allowing major Southern Hemisphere nations like South Africa and Australia to have more rapid connections to Britain, Europe and North America.


One of the United States' first space stamps recognised the potential for satellite communications to promote world peace

Assuming all goes well with the launch this evening, INTELSAT-1 will be placed in a geostationary orbit at 22,300 miles above the equator, east of the Brazilian coast. Once the satellite has been thoroughly checked out to be sure it’s in full working order, it will go into operation, around the beginning of June, as the first commercial satellite providing regular telecommunications and broadcasting services between North America and Europe.

Soaring to New Heights

Of course, satellite communications between the Unites States and Europe isn’t completely new: Telstar and Relay 1 both provided this service back in 1962. But both satellites were only in low Earth orbit, so they could only provide intermittent service. When Syncom 2 and 3, were launched in 1963 and ’64, respectively, these experimental spacecraft built by the Hughes Aircraft Company demonstrated the feasibility of using satellites in geosynchronous and geostationary orbit to provide a world-wide communications system. They were so successful in connecting America with countries from Japan to Nigeria, that Syncom 3 was the prototype on which Early Bird has been modelled, and you can see the similarity in design.


Syncom 3 above and Early Bird undergoing tests below

Like Syncom 3, INTELSAT-1 is spin stabilised, which is the reason for its cylindrical shape. It has two 6-Watt transponders that enable it to carry 240 two-way voice circuits and one television channel, although not simultaneously: in order to transmit television, all the telephone voice channels have to be shut down.  An important difference between the two satellites, though, is that INTELSAT-1 uses commercial rather than military frequencies for its communications to and from the ground.

INTELSAT-1 weighs just 85-lb which, amazingly for its capabilities, is less than half that of Sputnik 1’s 184 pounds. It is covered with 6,000 solar cells that generate 45 Watts of power to operate the satellite. Early Bird’s capabilities are so advanced that it will actually be more economical to operate than international undersea cables, which carry fewer channels and cost nearly 10 times as much!

Getting into Position

Early Bird is being launched by a Thrust-Augmented Delta, the same type of rocket that was used to put Syncom 3 into orbit. This vehicle, also known as the Delta D, is essentially the same as its predecessor, the Delta C, but with the addition of three Castor-1 solid rocket boosters attached to the first stage. The launch is taking place at Cape Canaveral Air Force Station Launch Complex 17A, which was also used for Syncom 3’s launch. The Delta will boost Early Bird into an elliptical orbit, taking it from 830 to 22,950 miles out in space. After 40 hours a series of delicate manoeuvres will place the satellite in its permanent orbital position.


Early Bird's launch vehicle being assembled. The Castor-1 solid boosters are being hoisted into position while the Delta rocket core waits in the background. It will soon be brought forward for mating with the boosters

Demonstrating the Future

Although it will operate as a commercial service, Early Bird will also be used to demonstrate that international satellite telecommunication is commercially viable in the long-term. While its main ground stations will be the huge horn antennae originally built for Telstar, it will also use ground stations with large parabolic ground antennae with diameters of over 85 feet, like the one at Goonhilly in England, and perhaps smaller antennae as well.


The Telstar horn antenna at Pleumeur-Bodou, France, is now being used as an INTELSAT-1 ground station

From my friends at WRE who are involved with the NASA Gemini tracking station at Carnarvon, Western Australia, I understand that if the Early Bird experience goes well, the antennae for the INTELSAT-2 satellites, that are being contracted by NASA to support the Apollo programme, will be an unusual Cassegrain feed-horn design that is already being nicknamed the “sugar scoop”! I’m fascinated to see what this antenna will actually look like, with a nickname like that!

The other thing that INTELSAT-1 will be determining is whether or not the end to end signal delay of 250 milliseconds, while the signal goes up to the satellite and returns to the ground, will be acceptable to customers. Syncom 3 demonstrated that geostationary orbit is so high that, even at the speed of light, there is a perceptible time-lag between comment and response when communicating internationally. Whether people will find this too disconcerting for use with international satellite phone calls could have a significant influence on how future communications satellite systems are developed.


240 phones for 240 conversations simultaneously carried on via Early Bird. But will people accept the time-lag that comes with geostationary satellite communications?

So, my friends in the Northern Hemisphere, enjoy the convenience of satellite telecommunication that will soon be available to you-I can’t wait for it to come to Australia as well.

We had so much success with our first episode of The Journey Show (you can watch the kinescope rerun; check local listings for details) that we're going to have another one on April 11 at 1PM PDT with The Young Traveler as the special musical guest.  As the kids say, be there or be square!

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Science / Space Race

[August 29, 1963] Why we fly (August Space Round-up)

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by Gideon Marcus

We've become a bit spoiled of late, what with space spectaculars occurring on a fairly regular basis.  So, I was not too surprised when a friend buttonholed me the other day and exclaimed, "When is the Space Race gonna get interesting again?"  After all, it's been a whole two months since the Vostok missions, three since the last Mercury mission, and even satellite launches have been few lately.

Oh ye of little faith.  The real work doesn't happen when the rockets go up, but after their payloads are aloft.  A lot happened in the arena of space this month — you just have to dig a little to learn about it.  Here are the exciting tidbits I gleaned (and the journos missed) in NASA's recent bulletins and broadcasts:

Bridging the Continents

Communication satellites continue to make our world a smaller place.  Syncom, built by Hughes and launched by NASA late last month, is the first comsat to have a 24-hour orbit.  From our perspective on the Earth's surface, it appears to do figure eights around one spot in the sky rather than circling the Earth.  This means Syncom can be a permanent relay station between the hemispheres.

It's already being used.  On August 4 the satellite allowed Nigerian journalists and folks from two U.S. services to exchange news stories as well as pictures of President Kennedy and Nigerian Governor General Dr. Nnamdi Zikiwe.  Five days later, voice and teletype was exchanged between Paso Robles, California and Lagos, Nigeria.  This 7,700 mile conversation represents the longest range real-time communication ever made.

And, on the 23rd, Syncom carried its first live telephone conversation — between President Kennedy and Nigerian Prime Minister Sir Abubaker Tafawa Balewa, as well as several other official conversations.  One has to wonder if the whole scheme wasn't hatched just so Jack could expand his pen pal list to West Africa…

More comsat news: RCA's Relay 1 is still alive and kicking, having been used in 930 wideband experiments, 409 narrowband transmissions, and 95 demos of TV and narrowband broadcasts.  And in a stunning imitation of Lazarus, AT&T's Telstar 2 came back on-line after having been silent since July 16.  I understand there will be an unprecedented experiment next month: NASA is going to use Relay and Syncom to bounce a message from Brazil to Africa.  Expect that kind of satellite ping-pong to become common in the future.

Finally, NASA's passive comsat, Echo 1, continues to be used for tests.  Come winter, it will be joined by Echo 2.  Because if there's anything space needs, it's more balloons.


First pass of Echo 1 satellite over the Goldstone

Predicting the Weather

Mariner 2, the Venus probe that encountered the Planet of Love last December, went silent early this year.  Yet its reams of data are still yielding discoveries.  During the spacecraft's long flight toward the sun, it took continuous measurements of the solar wind — that endless stream of charged particles cast off from the roiling fusion reactor of our nearest star.  These measurements were then compared to readings made on Earth and in orbit.  Scientists have now determined that the sun's radioactive breeze blows in gusts from 500 to 1350 kilometers per second, the bursts correlated with expansions in the solar corona.  When a particularly strong stream of electrons and protons, sizzling at a temperature of 500,000 degrees F., slams into the Earth's magnetic field, it causes disruptions in broadcasts and communications.

Closer to home, Explorer 12 soared far from Earth in its highly eccentric orbit, charting long-lived solar plasma streams in interplanetary space.  The satellite determined that these gouts of plasma caused geophysical disturbances more than twenty days after their creation.

One can imagine a constellation of satellites being deployed to provide solar system-wide space weather reports.  Not only would they help keep astronauts safe as they journeyed from planet to planet, but they'd also let radio operators on Earth know when to expect static in their broadcasts.

And speaking of weather forecasts, Tiros 6 and 7 continue to be our eyes in the sky, tirelessly shooting TV of Earth's weather.  They've already tracked the first hurricane of the season, Arlene.  Who knows how many lives and dollars they will save with their early warnings?

Previews of Coming Attractions

The ill-starred lunar probe, Ranger, has failed in all five of its missions.  In fact, NASA is 0 for 8 when it comes to moon shots since 1959.  Perhaps Ranger 6, set for launch around Thanksgiving, will break this losing streak.  It will be the first of the Block 3 Rangers, lacking the sky science experiments that flew on Rangers 1 and 2, and the big seismic impactors carried on Rangers 3-5.  The new Rangers will just shoot TV pictures of potential Apollo landing sites.  This sacrifice of science in deference to the human mission has not gone without protest, but given the dismal track record of the program, the labcoat crowd will have to take what they can get.

A full year after Ranger (hopefully) reaches the Moon, a pair of Mariners will set sail for Mars.  Unlike last year's Mariner 2, Mariners 3 and 4 will carry cameras to provide our first close-up view of the Red Planet.  Let's just hope neither of these upcoming probes meet the same fate as Russia's Mars 1, which died last March.

At some point in the mid-60s, even bigger Mariners will fly to the planets, carried by the big liquid oxygen "Centaur" second-stage.  The first successful test fire took place on August 17 just down the way from my house — at General Dynamics/Astronautics San Diego

And finally, another 271 space candidates applied to NASA this year.  They have been screened to 30, and out of them, 10-15 will be selected in late October to comprise the third group of astronauts.  None of them are women yet, but perhaps there will be some in time for Group Four.


Pilots Jerrie Cobb and Jane Hart testify before the Subcommittee of the House Committee on Science and Astronautics, July 1962.  That's an Atlas Centaur model next to them.

Who knows?  Maybe you'll be one of them!

[Want to talk to the Journey crew and fellow fans in real-time?  Come join us at Portal 55! (Ed.)]

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Science / Space Race

[March 24, 1963] Bumper Crop (A bounty of exciting space results)

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by Gideon Marcus

February and March have been virtually barren of space shots, and if Gordo Cooper's Mercury flight gets postponed into May, April will be more of the same.  It's a terrible week to be a reporter on the space beat, right?

Wrong!

I've said it before and I'll say it again.  Rocket launches may make for good television, what with the fire, the smoke, and the stately ascent of an overgrown pencil into orbit…but the real excitement lies in the scientific results.  And this month has seen a tremendous harvest, expanding our knowledge of the heavens to new (pardon the pun) heights.  Enjoy this suite of stories, and tell me if I'm not right…

How hot is it?

Mariner 2 went silent more than two months ago, but scientists are still poring over the literal reams of data returned since its rendezvous with Venus.  The first interplanetary mission was a tremendous success, revealing a great deal about the Planet of Love, whose secrets were heretofore protected by distance and a shroud of clouds. 

Here's the biggie: Preliminary reports suggested that the surface temperature of "Earth's Twin" is more than 400 degrees Fahrenheit.  It turns out that was a conservative estimate.  In fact, the rocky, dry landscape of Venus swelters at 800 degrees — possibly even hotter than the day side of sun-baked first planet, Mercury.  It's because the planet's dense carbon dioxide atmosphere acts like a heat blanket.  There's no respite on the night side of the hot world either; the thick air spreads the temperatures out evenly.

Thus, virtually every story written about Venus has been rendered obsolete.  Will Mariner 3 destroy our conception of Mars, too?

Just checking the lights

On February 25, the Department of Defense turned little Solrad 1 back on after 22 months of being off-line.  The probe had been launched in conjunction with a navigation satellite, Transit, back in June 1960.  For weeks, it had provided our first measurements of the sun's X-ray output (energy in that wavelength being blocked by the Earth's atmosphere and, thus, undetectable from the ground).  DoD has given no explanation for why the probe has been reactivated, or why it was turned off in the first place.  Maybe there's a classified payload involved?

Radio News from the Great White Spacecraft

Last September, the Canadians launched their first satellite — the "top-sounder," Alouette, whose mission was to measure the radio-reflective regions of our atmosphere from above.  The results are in, and to any HAM or communications buff, its huge news.

It turns out that the boundaries of the ionosphere are rougher at higher latitudes than at lower latitudes.  Moreover, Alouette has determined that the Van Allen Belts, great girdles of radiation around our planet, dip closer to the Earth at higher latitudes.  This heats up the ionosphere and causes the roughness-causing instability. — the more active the electrons, the poorer the radio reflection.  Now we finally know why radio communication is less reliable way up north.  The next step will be learning how to compensate for this phenomenon so that communication, both civil and military, can be made more reliable.

Sun Stroke Warning

After a year in orbit, NASA's Orbiting Solar Observatory is still going strong, with 11 of 13 experiments still functioning.  The satellite has probably returned more scientifically useful data than all of the ground-based solar observatories to date (certainly in the UV and X Ray spectra, which is blocked by the atmosphere).

Moreover, OSO 1 has returned a startling result.  It turns out that solar flares, giant bursts of energy that affect the Earth's magnetic field, causing radio storms and aurorae, are preceded by little microflares.  The sequence and pattern of these precursors may be predictable, in which case, OSO will give excellent advance warning of these distruptive events.

Tax money at work, indeed!

Galaxy, Galaxy, Burning Bright

In the late 1950s, astronomers began discovering some of the brightest objects in the universe.  It wasn't their visible twinkle that impressed so much as their tremendous radio outbursts.  What could these mysterious "quasi-stellar sources" be?

Now we have a pretty good guess, thanks to a recent scientific paper.  Cal Tech observers using the Mt. Wilson and Mt. Palomar observatories turned their gaze to object 3C 273, a thirtheenth magnitude object in the constellation of Virgo.  It turns out that 3C 273's spectrum exhibits a tremendous "red shift," that is to say, all of the light coming from it has wavelengths stretched beyond what one would expect.  This is similar to the decrease in pitch of a railroad whistle as the engine zooms away from a listener.

The only way an object could have such a redshift is if it were of galactic proportions and receding from us at nearly 50,000 km/sec.  This would place it almost 200,000,000 light years away, making it one of the most distant (and therefore, oldest) objects ever identified.

At some point, astronomer Hubble's contention that the universe is expanding is likely to be confirmed.  These quasi-stellar objects ("quasars"?) therefore represent signposts from a very young, very tiny universe.  What exciting times we live in!

Five years of Beep, Beep

St. Patricks Day, 1958 — Vanguard 1 was the fourth satellite in orbit, but it was the first civilian satellite, and it is the oldest one to remain up there.  In fact, it is the only one of the 24 probes launched in the 1950s that still works.

What has a grapefruit-sized metal ball equipped with a radio beacon done for us?  Well, plenty, actually.  Because it has been tracked in orbit so long, not only have we learned quite a bit about the shape of the Earth (the variations in Vanguard's orbit are due to varying gravities on the Earth, the measurement of which is called "geodetics"), but the satellite's slow decay also tells us a lot about the density of the atmosphere several hundred miles up.

So, while Sputnik and Explorer might have had the first laughs, Vanguard looks likely to have the last for a good long time.

Telstar's little brother does us proud

RCA's Relay 1, launched in December, is America's second commercial communications satellite.  It ran into trouble immediately upon launch, its batteries producing too little current to operate its transmitter.  Turns out it was a faulty regulator on one of the transponders; the bright engineers switched to the back-up (this is why you carry a spare!), and Relay was broadcasting programs across the Atlantic by January.  660 orbits into its mission and 500 beamed programs later, NASA announces that Relay has completed all tests. 

Nevertheless, why abandon a perfectly good orbital TV station?  Relay will continue to be used to transmit shows transcontinentally, especially now that Telstar has finally gone silent (February 21).  There is even talk that Relay could broadcast the Tokyo Olympics in 1964, if it lasts that long!

In a sea of Blue, a drop of Red

On March 12, 3-12 at the Spring Recognition Dinner of Miracle Mile Association, in Los Angeles, Cal Tech President, Lee DuBridge, noted that the United States has put 118 probes into space, while the Russians have only lofted 34 (that we know of).  He also pointed out that virtually no scientific papers have resulted from the Soviets' "science satellites." 

As if in reply, on March 21 the Soviets finally, after 89 days without a space shot, launched Kosmos 13.  (To be fair, it's been kind of quiet on the American side, too).  The probe was described as designed to "continue outer space research."  No description of payload nor weight specifications were given.  Its orbit is one that allows it to cover much of the world.  While it may be that some of the Kosmos series are truly scientific probes, you can bet that, like America's Discoverer program, the Kosmos label is a blind to cover the Russians' use of spy satellites.  Oh well.  Turnabout is fair play, right?

[Next up, don't miss Mark Yon's spotlight of this month's New Worlds!  And if I saw you at Wondercon, do drop me a line…]

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