Tag Archives: launch

Exploring Earth’s Atmosphere, a Lunar Flyby, and a Space Odyssey

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Fifty years ago today — April 2, 1963 — two quite different launches happened in the U.S. and the Soviet Union.


(Explorer 17. NASA image.)

The U.S. launched Explorer 17, also known as Atmospheric Explorer A, the first in a series of satellites to study the upper atmosphere. The satellite launched in the late evening — already April 3rd, UTC — on a Thor-Delta rocket out of Cape Canaveral, and operated until its batteries failed in July 1963.

Earlier in the day, the Soviet Union had launched Luna 4, the “first successful spacecraft of their ‘second generation’ lunar program.” It launched from the Baikonur Cosmodrome on a Molniya rocket — a Modified SS-6 (Sapwood) ICBM. Interestingly, the USSR did not reveal Luna 4’s intended mission, but “was announced it would travel to ‘the vicinity of the Moon.'”

Rather than being sent on a straight trajectory toward the Moon, the spacecraft was placed first in a 167 x 182 km Earth orbit and then was rocketed in a curving path towards the Moon. Luna 4 achieved the desired initial trajectory but during trans-lunar coast the Yupiter astronavigation system failed (most likely due to thermal control problems) and the spacecraft could not be oriented properly for the planned midcourse correction burn. Communications were maintained, but Luna 4 missed the Moon by about 8400 km (sources give reports of 8336.2, 8451, and 8500 km) at 13:25 UT on 5 April 1963 and entered a 89 250 x 694 000 km equatorial Earth orbit. The spacecraft transmitted at 183.6 MHz at least until 7 April. The orbit is believed to have been later perturbed into a heliocentric orbit.

… It was speculated the probe was designed to perform a soft landing on the Moon based on the trajectory and on the later attempted landings of the Luna 5 and 6 spacecraft, as well as the advances made over the 3 years since the successful Luna 3 flyby. (And the fact that a lecture program entitled “Hitting the Moon”, scheduled to be broadcast on Radio Moscow at 7:45 p.m. the evening of April 5, was cancelled.)

Before all of this happened, on this date 55 years ago President Dwight D. Eisenhower sent “draft legislation to Congress establishing the ‘National Aeronautics and Space Agency.'” The name was soon changed to the National Aeronautics and Space Administration. You can read more about NASA’s beginnings here.

Finally, 45 years ago today — April 2, 1968 — 2001: A Space Odyssey premiered at the Uptown Theatre in Washington, DC. This page includes a retrospective on its early run.

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Pegasus Carries Solar Explorer

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Fifteen years ago today — April 1, 1998* — a Pegasus XL originating from Vandenberg AFB carried a small satellite to study the Sun’s atmosphere.


(Coronal “loops” above the Sun’s surface, in a false-color image from TRACE. NASA image.)

The Transition Region And Coronal Explorer, or TRACE, carried a single multi-spectral instrument to

examine the three-dimensional magnetic structures which emerge through the Sun’s photosphere (the visible surface of the Sun) and define both the geometry and dynamics of the upper solar atmosphere (the transition region and corona).

In more detail, TRACE was built to achieve three primary objectives:

  1. follow the evolution of magnetic field structures from the solar interior to the corona;
  2. investigate the mechanisms of the heating of the outer solar atmosphere; and,
  3. determine the triggers and onset of solar flares and mass ejections.

The effectiveness of TRACE’s telescopic sensor was due to its sophisticated attitude control system, which combined magnetic-torquers, reaction wheels, and inertial gyros to maintain its pointing accuracy within 5 arc-seconds.

The TRACE mission lasted until June 2010, and produced some stunning images of our Sun.

___

*April 2nd UTC.

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Last Saturn-Apollo Block 1 Suborbital Test Flight

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Fifty years ago today — March 28, 1963 — the Saturn-Apollo 4 mission was launched from Cape Canaveral.


(Saturn SA-4. NASA image.)

Saturn-Apollo (SA) 4, or Apollo SA-4, was the final “Block 1” Saturn test, the last of four test launches of the Saturn rocket’s first stage.

The rocket was launched on a sub-orbital flight to an altitude of 129 km and a peak velocity of 5906 km/hr. After 100 seconds of flight, a pre-set timer cut off engine no. 5 as planned to test the “engine-out” capability of the booster. Fuel was successfully routed to the other seven engines and the flight continued.

Also on this date in space history, 30 years ago, the first of an advanced series of remote-sensing spacecraft, NOAA 8, launched into a polar orbit atop an Atlas E rocket out of Vandenberg AFB. Unfortunately, the satellite did not live out its two-year planned operational life: it failed in June 1984.

Finally, 10 years ago today — March 28, 2003 — Japan launched a pair of reconnaissance satellites, IGS (Information Gathering Satellite) 1A and IGS 1B, from Tanegashima Space Center on an H-2A rocket. According to the National Space Science Data Center, “One of the two spacecraft uses optical cameras with a resolution of one meter; the other uses synthetic aperture radar to provide images at a resolution of a few meters,” but it is unclear which satellite carried which sensor.

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Last Launch from San Marco, Kenya

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Twenty-five years ago today — March 25, 1988 — a joint U.S.-Italy mission lifted off from the San Marco Range, Kenya, on a Scout launch vehicle.


(Scout X-4 rocket with the earlier US-Italian satellite San Marco 1. NASA image from Wikimedia Commons.)

The last satellite orbited from the San Marco facility on the Kenyan coast, San Marco D/L carried a specialized suite of sensors to study the interaction between the solar wind and the Earth’s thermosphere and ionosphere. One instrument, the Wind and Temperature Spectrometer, failed after 20 days, but the rest of the spacecraft operated nominally. Though the satellite was intended to last a full year, it re-entered the atmosphere on December 6, 1988.

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Space History, 1958: Vanguard 1

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Fifty-five years ago today — March 17, 1958 — a Vanguard rocket carried the Vanguard 1 satellite to orbit out of Cape Canaveral.


(Vanguard 1. Note the very small solar panels on the side of the satellite. NASA image.)

Vanguard 1 was placed in an elliptical orbit with a perigee of 654 km (406 mi) and an apogee of 3969 km (2466 mi), inclined 34.25 degrees from the equator.

Original estimates had the orbit lasting for 2000 years, but it was discovered that solar radiation pressure and atmospheric drag during high levels of solar activity produced significant perturbations in the perigee height of the satellite, which caused a significant decrease in its expected lifetime to only about 240 years.

Vanguard 1’s batteries ran down in June 1958, stopping its battery-powered 10-mW transmitter, but its solar-powered 5-mW transmitter continued operating until May 1964. Vanguard 1 may still be optically tracked from Earth, and is the longest-orbiting man-made satellite.

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Making the ISS More International

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Five years ago today — March 11, 2008 — the Space Shuttle Endeavour launched from the Kennedy Space Center on a mission to the International Space Station.


(Astronaut Richard Linnehan on the first spacewalk of STS-123. NASA image.)

The STS-123 crew included U.S. astronauts Dominic L. Gorie, Gregory H. Johnson, Robert L. Behnken, Michael J.Foreman, and Richard M. Linnehan, and Japanese astronaut Takao Doi. The mission transported astronaut Garrett E. Reisman to the ISS and brought French astronaut Leopold Eyharts back to Earth.

The mission also delivered the first piece of Japan’s Kibo research laboratory, and a new Canadian robotic arm known as “Dextre,” both of which were successfully attached to the ISS. In all, STS-123 spent a little over 2 weeks in space before landing back at KSC on March 26th.

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‘Jules Verne’ Reaches Space

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Five years ago today — March 9, 2008 — the European Space Agency launched an Ariane 5 rocket from Kourou carrying the Jules Verne cargo vehicle to the International Space Station.


(ISS crewmembers pose for a portrait inside the Jules Verne ATV with an original Jules Verne manuscript and a 19th century Jules Verne book. NASA image from Wikimedia Commons.)

Jules Verne, also known as Automated Transfer Vehicle (ATV) 1,

remained a “free-flyer” until the undocking of STS 123 on 27 March. It successfully demonstrated the ability to reach ISS within 3.5 km with the help of GPS transmissions, and, in another attempt, to reach within 11 m with the help of laser ranging. These demonstrations earned the approval by the ISS managers to make an actual docking with the Zvezda module of the ISS on 03 April 2008.

The cargo vessel remained docked to the ISS for six months; then, filled with garbage from the station, it undocked and deorbited. It burned up in the atmosphere on September 29, 2008.

Of particular note to me (and presumably to my geeky and writerly friends), the ATV carried an original Jules Verne manuscript into space. That speaks highly of ESA’s confidence in the craft and the Ariane launch vehicle.

For more information, here’s a NASA fact sheet and the Wikipedia entry on the ATV program. And this ESA page has a video of the launch.

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The Evolution of Launch Capability: 3 Decades, 3 Launches

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Today’s space history entry provides a glimpse of how space launch operations improved in the first 20 years of the space age.

First, 55 years ago today — March 5, 1958 — we attempted to launch the Explorer 2 satellite from Cape Canaveral on a Jupiter C rocket. The vehicle lifted off without incident (which some in the industry might consider a launch success), but its upper stage failed and the satellite did not reach orbit.


(Explorer 2 launch. US Army image from Wikimedia Commons.)

Ten years later, on March 5, 1968, the small scientific satellite SOLRAD 9 launched aboard a Scout vehicle from the Wallops Flight Facility in Virginia. SOLRAD 9 was also known as Explorer 37, and it operated successfully until 1974.

And then 10 years later still — on this date in 1978 — Landsat 3 launched atop a Delta rocket out of Vandenberg AFB, with the Oscar 8 amateur radio satellite along for the ride.

So, on this date in space history we had three launch attempts, each a decade removed from another, from three different launch bases, resulting chronologically in a failed mission, a successful mission, and a successful multi-satellite mission. That seems like progress.

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First International Space Flight, and a Precursor

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Thirty-five years ago today — March 2, 1978 — the Soyuz 28 mission launched from the Baikonur Cosmodrome on a flight to the Salyut-6 space station. Soyuz 28 rates as the first space mission with an international crew by virtue of the fact that Soviet cosmonaut Alexei A. Gubarev was joined by Czech (i.e., of the Czechoslovak Socialist Republic) cosmonaut Vladimir Remek.

Ten years earlier — on March 2, 1968 — the USSR had launched the unmanned Zond 4 mission from Baikonur atop a Proton K. Previous Zond spacecraft had been planetary probes, but Zond 4 was designed as a manned capsule, though this test flight did not include occupants.


(Zond spacecraft atop Proton upper stage, in Baikonur assembly building. Image from Wikimedia Commons.)

The mission included a couple of interesting elements:

The trajectory away from the Moon was probably unintentional (although some claims were made that it was aimed away from the Moon to avoid complications of lunar gravity). The spacecraft supposedly could not be sent towards the Moon because of a malfunction in the attitude control system. On Earth, cosmonauts Popovich and Sevastyanov communicated from an isolated bunker with Yevpatoriya Flight Control Center in the Ukraine via a relay on board the spacecraft to simulate communications between cosmonauts in space and the ground controllers on Earth.

The Zond series of launches continued, but did not include any manned missions.

Sometimes it’s remarkable how short a time it took for manned spaceflight to become almost routine. But who knows how long it will be before it’s routine enough for the rest of us to enjoy?

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Pegasus Carries Student Satellite to Orbit

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Fifteen years ago today — February 25, 1998 — a Pegasus XL rocket launched a student-built satellite to track variations in nitric oxide pollutants in the atmosphere.


(Student Nitric Oxide Explorer integrated on the Pegasus launch vehicle. University of Colorado LASP image.)

The Student Nitric Oxide Explorer (SNOE) was built by University of Colorado students, under a program managed by the Universities Space Research Association.

Flying out of Vandenberg AFB, the Pegasus XL was dropped from its L-1011 carrier aircraft and propelled SNOE and the Broadband Advanced Technology Satellite (also known as BATSAT and later as Teledesic 1) into orbit.

The SNOE mission lasted nearly 6 years; the satellite de-orbited in December 2003. You can learn more about SNOE at this University of Colorado Laboratory for Atmospheric and Space Physics page .

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