Garmin DGPS 53 사용 설명서 및 참조 설명서 - 페이지 24

{카테고리_이름} Garmin DGPS 53에 대한 사용 설명서 및 참조 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Garmin DGPS 53 32 페이지. Integrated gps/dgps receiver
Garmin DGPS 53에 대해서도 마찬가지입니다: 소유자 매뉴얼 (32 페이지), 사양 (2 페이지)

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www.reelschematic.com

Reference

www.reelschematic.com

Sources of

Error

Number of Satellites Visible— As previously

stated, the number of satellites available can affect

position accuracy. To apply the corrections provided for

the satellites received at the beacon transmitter station, the

same satellites (at least in part) must be received by your

GPS receiver. And, certainly, if there aren't enough

satellites to determine a GPS position, there aren't enough

satellites to calculate a DGPS position.

Atmospheric Conditions— Differences in the

ionosphere and/or troposphere between the DGPS

broadcast station and the DGPS receiver can result in

decreased position accuracy. Although this does not cause

significant error, the amount of error can increase as you

get further away from the DGPS broadcast station.

Satellite Geometry— A minimum of 4 satellites are

required to determine a 3D position. At times, additional

satellites are required due to their placement with respect

to each other. This relative placement is referred to as

"satellite geometry". Ideal satellite geometry exists when

the satellites are located at wide angles with respect to

each other. When satellites are located in a line or a close

group, satellite geometry is considered poor.

This same requirement applies to DGPS. If

corrections are available for four different satellites, but

they are all located in the same general area or in a line,

the DGPS corrections will be minimal. However, if the

same four satellites are placed farther apart, in several very

different directions from our position, the corrections will

have a much greater effect and the position accuracy will

be greatly improved.