Garmin GPS 500 Bedienungsanleitung PDF herunterladen (Seite 191)

GPS 500 Pilot’s Guide and Reference

12-3

SECTION 12

ADDITIONAL FEATURES

comes between the transponder antenna (usually located

on the underside of the aircraft) and the ground-based

radar antenna, the signal may be temporarily interrupted.

Other limitations and anomalies associated with TIS are

described in the AIM, Section 1-3-5.

TIS is unavailable at low altitudes in many areas

of the U.S., particularly in mountainous regions.

Also, when ﬂying near the ‘ﬂoor’ of radar cov-

erage in a particular area, intruders below the

client aircraft may not be detected by TIS.

TIS information is collected one radar scan prior to

the scan during which the uplink occurs. Therefore, the

surveillance information is approximately 5 seconds old.

In order to present the intruders in a ‘real time’ position,

the TIS ground station uses a predictive algorithm in

its tracking software. This algorithm uses track history

data to extrapolate intruders to their expected positions

consistent with the time of display in the cockpit.

Occasionally, aircraft maneuvering causes this algorithm

to induce errors in the 500 Series display. These errors

primarily affect relative bearing information and trafﬁc

target track vector (it lags); intruder distance and altitude

remain relatively accurate and may be used to assist in

“see and avoid”. Some of the more common examples of

these errors follow:

•

When client or intruder aircraft maneuvers

excessively or abruptly, the tracking algorithm

may report incorrect horizontal position until the

maneuvering aircraft stabilizes.

•

When a rapidly closing intruder is on a course

that crosses the client aircraft course at a shallow

angle (either overtaking or head on) and either

aircraft abruptly changes course within .25 nm,

TIS may display the intruder on the wrong side of

the client.

The preceding errors are relatively rare occurrences

and are corrected in a few radar scans once the course has

stabilized.

Users of TIS can render valuable assistance in the

correction of malfunctions by reporting their observations

of undesirable performance.

Reporters should identify:

• Time of observation

• Location, type, and identity of aircraft

• Condition observed

• Type of transponder, processor, and software in

use

Since TIS performance is monitored by maintenance

personnel rather than ATC, it is suggested that malfunctions

be reported in the following ways:

•

By telephone to the nearest Flight Service Station

(FSS) facility.

•

By FAA Form 8000-7, Safety Improvement

Report, a postage-paid card designed for this

purpose. These cards may be obtained at FAA

FSS’s, General Aviation District Ofces, Flight

Standards District Ofces, and General Aviation

Fixed Based Operations.

190-00181-60 Rev. G

1 2 ... 186 187 188 189 190 191 192 193 194 195 196 ... 255 256

Kommentare zu diesen Handbüchern

Keine Kommentare

Garmin GPS 500 Bedienungsanleitung Seite 191

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Luftausrüstung Garmin GPS 500