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RADARSearch and Weather Radar (AN/APN-59)>

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Objective

After this lesson, the students will be able to understand

Introduction of search Radar

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Foreign Object Damage

Search and weather Radar (APN-59) >FOD 1 of 10

Where does it come from?

Improper Aircraft

Maintenance

Airfield Construction

Poor Housekeeping

Vehicles / Equipment

RADAR

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RADAR

Safety

Before & after rectification must inspect the sys for any FOD witch leads towards short circuiting or damage to the equipments

Search and weather Radar (APN-59) >Safety 1 of 10


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CAUTION

Ensure that the DC power supply output does not exceed 27 VDC at any time as to ensure that the displays are not damaged

Search and weather Radar (APN-59) >Safety 1 of 10RADAR

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Discrepancy

RARAR tilt is U/S & tilt OUT by + 10

degrees. range knob is U/S

Cause

T/Shooting c/out found antenna and C-1242 faulty

Remedial Action

Antenna and C-1242 replaced with S/A and IP-239 indicator range knob

adjusted. Ops checked found Sat.

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Search & Weather Radar Sys (APN-59) > Defect 1 of 10

WXR RADRA CONT PNL

RADAR


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Purpose To warn against weather

disturbances

To map terrain

To aid in navigation

Applicability

Installed on C-130 B&E A/C

TO Ref

1C-130B02-8

Introduction


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RADAR stands for RA Radio D

Detection A And R

Ranging

Primary radar

Range

By the reflection time

Bearing

Moving the antenna

Targets

Displayed on indicators

Introduction


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Radar Fundamentals

Radar sees anything that reflects its signal

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Introduction


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Wet HailRainWet SnowDry HailIce CrystalsDry Snow

Reflective Levels of Precipitation

Radar Fundamentals

Least Reflective

Most Reflective

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Introduction


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Radar Fundamentals

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Introduction


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Lower 2/3 of a thunderstorm is the most reflective

Radar Fundamentals

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Introduction


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At high altitudes it’s very easy to overshoot the most reflective part of the storm

Radar Fundamentals

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Introduction


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How A Raindrop Reflects

Radar Fundamentals

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Introduction


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Areas of heavy rainfall may hide other storms

Radar Fundamentals

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Introduction


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Power requirement 115VAC 400 Hz

C/B 5Amp ESS AC BUS

115VAC 380 to 1000 Hz C/B 15Amp ESS AC BUS

28VDC C/B 10Amp ESS DC BUS

Location Radio C/B panel

Introduction


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CAUTION

Ensure that the DC power supply output does not exceed 27 VDC at any time as to ensure that the displays are not damaged

Search and weather Radar (APN-59) >Safety 1 of 10RADAR

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SUMMARY Introduction of search and Weather Radar

Input power requirement

Search and weather Radar (APN-59) > 1 of 10RADAR

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Q & A


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Q. RADAR stands for

a Radio Distance And Rangingb Radio Distance And Radiationc Radio Detection And Rangingd Radio Detection And Radiation

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Q & A


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Q. How many types of RADAR

a Oneb Twoc Threed Four

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Q & A


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Q. How bearing is achieved by primary radar ?

a By the time difference between transmitted frequency and received frequency b By frequency difference between transmitted

frequency and received frequency c By moving antenna d bearing is not calculated

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Q & A


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Q. I/P power of AN/APN-59

a 115VAC 400 Hzb 28 VDCc 115VAC 380 to 1000 Hzd 115VAC 400 Hz, 115VAC 380 to 1000 Hz, and 28 VDC

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Q & A


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Q. Maximum reflectivity area of weather is

a Lower 2/3 of a thunderstorm b Upper 2/3 of a thunderstorm c Lower 1/3 of a thunderstorm d Upper 2/3 of a thunderstorm

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Q & A


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End

apn-59 1 of 10

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