Alouette 1

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For the line of helicopters, see Aérospatiale Alouette.

Alouette 1
The Alouette 1 satellite
Mission typeIonospheric
OperatorDRDC
Harvard designation1962 Beta Alpha 1
COSPAR ID1962-049A Edit this at Wikidata
SATCAT no.424
Mission durationFinal: 10 years and 1 day
Spacecraft properties
Manufacturer
Defence Research Telecommunications Establishment
Launch mass145.6 kilograms (321 lb)
Start of mission
Launch dateSeptember 29, 1962, 06:05 (1962-09-29UTC06:05Z) UTC
Rocket
Vandenberg LC-75-1-1
End of mission
DeactivatedSeptember 30, 1972 (1972-10-01)
Orbital parameters
Reference system
Semi-major axis
7,381 kilometres (4,586 mi)[1]
Eccentricity0.00243[2]
Perigee altitude996 kilometres (619 mi)[2]
Apogee altitude1,032 kilometres (641 mi)[2]
Inclination80.500 degrees[2]
Period105.50 minutes[2]
Epoch29 September 1962 06:05:00 UTC[2]
 

Alouette 1 is a deactivated Canadian

skylark"[4] and the French-Canadian folk song of the same name
.

A key device on Alouette were the radio antennas consisting of thin strips of

measuring tape. When triggered, the rotation of the satellite created enough centrifugal force to pull the disk away from the spacecraft body, and the shaping of the metal caused it to unwind into a long spiral. The result was a stiff circular cross-section antenna known as a "STEM", for "storable tubular extendible member".[5]

Development

Alouette 1 was part of a joint Canada-U.S. scientific program.[6] Its purpose was to investigate the properties of the top of the ionosphere, and the dependence of those properties on geographical location, season, and time of day.[7] Alouette 1 was advanced for its time, and NASA initially doubted whether the available technology would be sufficient. Nevertheless, NASA was eager to collaborate with international partners.[8] NASA was convinced to participate by the prospect of obtaining data on the ionosphere, and Canada had the additional objective of developing its own space research programme.[8] The United Kingdom also aided the mission by providing support at two ground stations, in Singapore and at Winkfield.[9]

Experiments

Alouette 1 carried four scientific experiments:

The satellite did not have a tape recorder to store data.[14] It was only possible to obtain data when the satellite was in range of a receiving station.[15]

Duplicate construction

Two satellites were built for redundancy in case of a malfunction; if the first unit failed, the second could be launched with only a couple of months delay. It took 3½ years after Alouette's proposal to have it developed and built.

Canadian Air and Space Museum. The batteries used for Alouette were developed by the Defence Chemical, Biological, and Radiation Laboratory (DCBRL), another branch of DRB, and were partially responsible for the long lifetime of the satellite. The "Storable Tubular Extendable Member" antennas used were the first of DHC's STEM antennas used in space, and at launch were the longest (150 feet tip to tip).[17] Companies such as RCA Victor and Spar Aerospace Limited produced some of their first pieces of space equipment for the Alouette 1 project.[18] Parts used for the construction of Alouette 1 can still be found in the Musée des ondes Emile Berliner in Montreal, Quebec where part of the satellite was worked on.[19]

Satellite launch and mission progress

Alouette 1 was launched via

USSR and the United States, to design and construct its own satellite.[23] Alouette was used to study the ionosphere, using over 700 different radio frequencies to investigate its properties from above.[24]

The satellite was initially spin-stabilized, rotating 1.4 times per minute. After about 500 days, the rotation had slowed to about 0.6 rpm and the spin-stabilization failed at this point. It was then possible to determine the satellite's orientation only by readings from a magnetometer and from temperature sensors on the upper and lower heat shields.[14] The orientation determinations obtained this way were only accurate to within 10 degrees. It is likely that gravitational gradients had caused the longest antenna to point towards the Earth.[15]

A 2010 technical report by the US Defense Threat Reduction Agency titled "Collateral Damage to Satellites from an EMP Attack"[25] lists Alouette 1 among the satellites damaged by residual radiation from the July 9, 1962, Starfish Prime high-altitude nuclear test conducted by the United States. Another article, titled "Anthropogenic Space Weather",[26] indicates Alouette 1 sustained no significant adverse effects from the Starfish radiation, most likely due to a very conservative power supply design that allowed for a 40% degradation of solar cell performance.

Alouette's mission lasted for 10 years before the satellite was deliberately switched off on September 30, 1972.[27] The satellite remains in orbit; in 1966 it was estimated that Alouette 1 would remain in orbit for 1000 years.[28]

Post mission

After Alouette 1 was launched, the upper stage of the rocket used to launch the satellite became a derelict object that would continue to orbit Earth for many years. As of 2022, the upper stage remains in orbit.[29]

The satellite itself became a derelict, remaining in Earth orbit As of 2022. [30]

The Alouette 1 was named an

IEEE Milestone in 1993.[31] It is featured on the Amory Adventure Award
.

Alouette 1's backup was later launched, with some modification, as Alouette 2 in 1965 to "replace" the older Alouette 1.[32]

See also

References

  1. ^ "ALOUETTE 1 (S-27)". N2YO.com. April 26, 2016. Retrieved April 26, 2016.
  2. ^ a b c d e f "Alouette 1 – Trajectory Information". NASA NSSDCA. Retrieved January 1, 2023.
  3. ^ Palimaka, John. "The 30th Anniversary of Alouette I". IEEE. Archived from the original on March 3, 2016. Retrieved April 18, 2014.
  4. ^ Helen T. Wells; Susan H. Whiteley; Carrie E. Karegeannes. Origin of NASA Names. NASA Science and Technical Information Office. p. 10.
  5. ^ "Antenna material". Ingenium. Retrieved July 23, 2018.
  6. ISBN 0521310652
  7. ^
    ISBN 3540423885
    .
  8. ^ a b Rakobowchuk, Peter (September 8, 2012), "NASA once thought Canada's famed Alouette-1 satellite was too ambitious: space engineer", National Post, retrieved May 1, 2015
  9. ^ Le Galley, Donald P. (1964), "1", in Le Galley, Donald P.; Rosen, Alan (eds.), Space Physics, Univer1sity of California Engineering and Physical Sciences Extension Series, John Wiley and Sons, p. 36
  10. ^ "Sweep-Frequency Sounder". NASA. August 26, 2014. Retrieved September 30, 2014.
  11. ^ "Energetic Particles Detectors". NASA. August 26, 2014. Retrieved September 30, 2014.
  12. ^ "VLF Receiver". NASA. August 26, 2014. Retrieved September 30, 2014.
  13. ^ "Cosmic Radio Noise". NASA. August 26, 2014. Retrieved September 30, 2014.
  14. ^
    ISBN 978-0-8160-5330-8
    .
  15. ^ a b Grayzeck, Ed (August 26, 2014). "Alouette 1". NASA. Retrieved April 18, 2014.
  16. ^ "Canada: 50 years in space - Canadian Geographic". Archived from the original on July 19, 2012. Retrieved July 6, 2012.
  17. ^ "The Alouette Program". Online Journal of Space Communication. 4. Ohio University. Retrieved January 1, 2023.
  18. ^ Agency, Canadian Space (March 5, 2012). "Satellite Alouette I and II". Canadian Space Agency. Retrieved August 16, 2022.
  19. ^ "Magic of Waves in Saint-Henri". Musée des ondes Emile Berliner. Retrieved August 16, 2022.
  20. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Report. Retrieved October 11, 2020.
  21. ISBN 90-277-0959-9
  22. ISBN 0471056499
    .
  23. ^ "Alouette I and II". Canadian Space Agency. March 3, 2012.
  24. ^ Gainor, Chris (2012), Alouette 1 – Celebrating 50 Years of Canada in Space, SpaceRef, archived from the original on April 17, 2015
  25. ^ Conrad, Edward E., et al. "Collateral Damage to Satellites from an EMP Attack" Report DTRA-IR-10-22, Defense Threat Reduction Agency. August 2010 [1] (Retrieved May 27, 2019)
  26. ^ T. I. Gombosi., et al. "Anthropogenic Space Weather" Space Science Reviews. 10.1007 (Page 26, Table 2) [2] (Retrieved May 27, 2019)
  27. ^ Baker, David (2004). Jane's Space Directory. Jane's Information Group. p. 471.
  28. ^ "Space trash, and an inventory of hardware in orbit". LIFE. Vol. 61, no. 6. 1966. p. 29.
  29. ^ "Alouette 1 Rocket – Satellite Information". satellite database. Heavens-Above. Retrieved September 25, 2013.
  30. ^ "Alouette 1 – Satellite Information". satellite database. Heavens-Above. Retrieved September 25, 2013.
  31. ^ "Milestones:Alouette-ISIS Satellite Program, 1962". IEEE Global History Network. IEEE. Retrieved July 29, 2011.
  32. ^ "The ISIS Satellite Program". friendsofcrc.ca. July 19, 1996. Retrieved February 26, 2017.

External links

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