US Geological Survey - Operation Deep Freeze 71- Antarctica 12/1/71

Item Specifics

Country

United States

Condition

Unused

Stamp Format

Single

Certificate Grade

Not Graded

Item Description

Condition: Fine, Addressed cover

Grade: F (Fine)
Operation Deep Freeze is codename for a series of USA missions to Antartica, beginning with "Operation Deep Freeze I" in 1955–56, followed by "Operation Deep Freeze II", "Operation Deep Freeze III", and so on. (There was an initial operation before Admiral Richard E Byrd proposed 'Deep Freeze'). Given the continuing and constant US presence in Antarctica since that date, "Operation Deep Freeze" has come to be used as a general term for US operations in that continent, and in particular for the regular missions to resupply US Antarctic bases, coordinated by the United States Military. Task Force 199 was involved.1971-72 Antarctic Research Program Accuracy of the Earth's-Gravitational Field national and international efforts to accurately define the earth's gravity field. The geoid (the equipotential surface of the earth's gravity field at "undisturbed" mean sea level) and Topographic Mapping of the Earth using the US satellite Geodesy.

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allcovers (249)

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12/10/2020

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Item Location

Pennsylvania, United States

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Worldwide

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