Midterm 1 Flashcards
What’s a map
Graphic representation of surface features with components of scale and spatial location
What’s a base map
General purpose map of a region some features are lake/river, landforms and cities/rivers/ highways/ roads/rail
Thematic maps
A specific theme like agriculture, soils, forest cover, electoral, climate, ect.
Geographic map
General geographic information. Describes the earths surface form and physical features, natural features, natural and political devisions and climate
Topographic
Shape and elevation of terrain features
Cadastral maps
Land ownerships
Hydrographic maps
Water in all of its forms
Engineering maps
Maps for engineer and planners
Cartogram maps
Territories or land masses( map of Canada)
The first artificial earth’s satellite
Sputnik 1
What does LEO stand for
Low earth orbit
What is the period and altitude of LEO
period 128 minutes or less
Altitude is 2,000km
Meow many radio antennas did Sputnik 1 have
4
What were the radio signals heard as and how many days did it continue (Sputnik 1)
Signals were beeps
Continued for 21 days (batteries died October 26, 1957)
What university observed the Doppler effect
John Hopkins university
What is the Doppler effect
The frequency of radio signals increased as the satellite approached and decrease as the satellite moved away
If a satellite location can be determined from the ground using frequency shift, then how can the location of the receiver on the ground be determined?
By distance from the satellite
What is ARPA
Advanced Research Projects Agency
When was ARPA created
1958
What did ARAP develop?
Transit
What was Transit and who used it
Worlds first global satellite navigation system used by the military and some commercial users
