ELM - GPS Study

What are three components of Global Positioning Systems?

• space segment, control segment, user segment

• control segment, user segment, land segment

• user segment, land segment, sea segment

How many satellites are in orbit right now

• 24

• 29

• 12

• 42

GPS satelittes circle the earth ________a day

• once

• twice

• four times

• three times

Satelittle _____________ height is 19000 kms.

• orbit

• radius

• raft

• orzo

Users have access to close to ____ and ____ satellites from any point on earth

• 5 , 8

• 1, 3

• 2, 42

• 0, 3

Satellite signals contain 3 pieces of information including...

• ID number, almanac data, and ephemeris data

• ID number, almanac data, and TikTok ID

• Almanac data, ID number, and reels

Sources of error are ______________ .

• good

• bad

• unavoidable

• peeesh

Good Positional Dilution of Precision (PDOP) is when ___________________________.

• satellites are spaced out

• satellites are close together.

Another source of error can be caused by __________________ .

• buildings, bridges, and mountains

• snakes, ladders and chains

• buildings, bridges, and water

• bridges, mountains, and water

GPS units in the field can be used for ______________. (check all that apply)

• Location

• Navigation

• Tracking

• Mapping

• Timing