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Surveyor Probesclick for a larger image
Surveyor Probes


A US unpiloted space program of the late 1960s that was designed to investigate the bearing strength, physical structure, and chemistry of the lunar regolith by means of trenching devices and alpha-scattering analysis (see table). The spacecraft were soft-landed by retrorockets. Each was equipped with a television camera, powered by solar cells, for panoramic photography. The maria were shown to have a basaltic composition, whereas the highlands were found to be richer in calcium and aluminum. See also Luna probes; Lunar Orbiter probes; Ranger; Zond probes.



the designation of a series of American spacecraft used in lunar exploration. The Surveyor program included studies to determine the mechanical characteristics, chemical composition, and electromagnetic properties of lunar soil and the thermal conditions on the surface of the moon. Television pictures of the lunar surface were obtained in order to study the topography and structure of the soil, laser emission transmitted from the earth was recorded, and astronomical investigations were conducted, including the photographing of stars, the sun, and the planets. “Surveyor” was also the name of the program for developing and launching the spacecraft in the period 1960–68. The engineering objective of the Surveyor program was the development of a system for soft landings.

The Surveyor spacecraft consisted of an engine module containing three liquid-propellant vernier rockets and a solid-pro-pellant retro-rocket, a power module with solar and chemical batteries, radio equipment, and guidance systems for flight control and orientation. The scientific apparatus included an alpha-particle scatterer and analyzer for determining the chemical composition of the lunar soil from reflected alpha particles (Surveyor 5, 6, and 7), a scoop for investigating the mechanical properties of the lunar soil (Surveyor 3, 4, and 7), instruments for detecting magnetic substances in the soil (Surveyor 4, 5, 6, and 7), and a television camera for photographing the moon in the approach area (Surveyor 1 and 2). A panoramic television camera for taking photographs after the landing on the moon was installed in all Surveyor spacecraft; a total of 86,500 photographs of the lunar surface, the sun, and the planets was taken.

The maximum diameter of all Surveyor spacecraft (measured across the extended supports of the landing chassis) was 4.27 m; the height (with chassis folded) was approximately 3 m; the weight at launch was 995–1,038 kg; and the weight after landing was 276–297 kg. An Atlas-Centaur launch vehicle was used for the launching. A total of seven spacecraft were launched in the period 1966–68, of which Surveyor 1, 3, 5, 6, and 7 accomplished a soft landing and completed the assigned tasks.



One whose occupation is surveying, or who is otherwise skilled in the art.
References in periodicals archive ?
After getting the map, the surveyor visits the land where he/she might take some measurements to ascertain that the measurements indicated on the maps are the exact measurements on the ground.
b) the terms of reference given to the insurance surveyor by the person engaging him;
A net balance of 12 per cent of surveyors reported house prices rising rather than falling in August, up from a balance of 5 per cent the previous month.
This contract includes two distinct families of surveyor services:
Many of these are specified by building regulations, which the surveyor needs to understand and adhere to.
Making up the new recruits is Samuel Russell who has joined the firm's Bristol office as a quantity surveyor.
SECP has proposed to change the Insurance Rules, 2002, by raising the paid up capital requirement for insurance surveyors from PKR 1 million to PKR 5 million, and raising indemnity insurance requirement for insurance surveyors from PKR 1 million to PKR 10 million, said a press release here
Properties in the UK are taking much longer to sell than five years ago, the Royal Institution of Chartered Surveyors (RICS) has said.
Over the course of six books, then, Norden puts the Surveyor into conversation with a Farmer, an absentee aristocratic landowner, a Bailiff (that is, the Farmer now serving as his lord's legal officer), and a purchaser of land.
To qualify as a Chartered Surveyor through Rics, you have to study for a degree accredited by the Rics for minerals surveying.
Recommendation: To address surveyor workforce shortages and insufficient training, the Administrator of CMS should evaluate the current training programs and division of responsibility between federal and state components to determine the most cost-effective approach to: (1) providing initial surveyor training to new surveyors, and (2) supporting the continuing education of experienced surveyors.
The figures came as data from the Royal Institution of Chartered Surveyors showed that surveyors think the shortage of homes on the market has helped stabilise prices.