Wind shear alerting at hong kong international airport
Download
1 / 25

Wind shear alerting at Hong Kong International Airport - PowerPoint PPT Presentation


  • 237 Views
  • Updated On :

Wind shear alerting at Hong Kong International Airport. S.Y. Lau Hong Kong Observatory. In Hong Kong…. Significant windshear : 1 in 500 flights 5 typical causes Winds blowing across terrain (terrain-induced) Sea breeze Gust fronts Microbursts Low-level jets.

Related searches for Wind shear alerting at Hong Kong International Airport

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Wind shear alerting at Hong Kong International Airport' - kalei


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Wind shear alerting at hong kong international airport l.jpg

Wind shear alerting at Hong Kong International Airport

S.Y. Lau

Hong Kong Observatory

WMO Symposium

Toulouse 2005


In hong kong l.jpg
In Hong Kong…

  • Significant windshear : 1 in 500 flights

  • 5 typical causes

    • Winds blowing across terrain(terrain-induced)

    • Sea breeze

    • Gust fronts

    • Microbursts

    • Low-level jets

WMO Symposium

Toulouse 2005


Slide3 l.jpg

WMO Symposium

Toulouse 2005


Winds blowing across terrain terrain induced l.jpg
Winds Blowing Across Terrain (Terrain-induced)

  • In lighter wind conditions, low-level temperature inversion also triggers windshear (spring months)

  • Windy occasions like during TC…

WMO Symposium

Toulouse 2005


Equipment suite l.jpg

Equipment along runway

TDWR

Weather Buoys

LIDAR

Equipment suite

WMO Symposium

Toulouse 2005


Lidar fully operational in mid 2004 l.jpg

LIDAR Scanner

ATCX Building Roof-top

LIDAR – Fully Operational in Mid-2004

Installed in mid-2002

IR (2 μm) → eye-safe

WMO Symposium

Toulouse 2005


Slide7 l.jpg

Shear line

Shear line

Radial shear algorithm

Shear line discernible on LIDAR velocity picture

Shear line identified by algorithm

WMO Symposium

Toulouse 2005


Hazard coverage area l.jpg
Hazard Coverage Area

WMO Symposium

Toulouse 2005


Hazard coverage area9 l.jpg
Hazard Coverage Area

Red: Arrival - 1.0 deg PPI. Departure - 4.5 deg PPI

Blue: Arrival - 0.0 deg PPI. Departure - 1.0 deg PPI

WMO Symposium

Toulouse 2005


Glide path scan l.jpg
Glide-path Scan

laser beam

N

glide path

WMO Symposium

Toulouse 2005


30 march 2005 synoptic pattern l.jpg
30 March 2005Synoptic pattern

Hong Kong

WMO Symposium

Toulouse 2005


Ascent from king s park l.jpg
Ascent from King’s Park

4.7°C

WMO Symposium

Toulouse 2005


Locally around hkia l.jpg
Locally around HKIA

WMO Symposium

Toulouse 2005


Temperature l.jpg

4

3

1

5

2

Temperature

WMO Symposium

Toulouse 2005


Lidar animation l.jpg
LIDAR animation

WMO Symposium

Toulouse 2005


Lidar 1 0 degree ppi scan at 0049 utc 30 march 2005 l.jpg
LIDAR 1.0 degree PPI scan at 0049 UTC 30 March 2005

  • 45 WS reports (00 – 03 UTC):

    0005 07RA -15 KT 4NM

    0029 07RA -30 KT 1NM

    0032 07RA 35 KT 1NM

    0045 07RA 25 KT 1NM

    0049 07LA -20 KT 2NM

Cold colours(blue, green) – moving towards LIDAR

Warm colours (yellow, orange, pink) – moving away from LIDAR

WMO Symposium

Toulouse 2005


Slide17 l.jpg
RAGA …

WMO Symposium

Toulouse 2005


Glide path scan at 00 48 utc l.jpg

0° elevation

PPI scans

Glide Path Scan at 00:48 UTC

Elevation Azimuth

2.2° 63.9° –

-1.0° 4.05°

Elevation Azimuth

2.3° 75.5° –

0.0° 91.3°

Elevation Azimuth

2° 255.8° –

-1.0° 271.3°

Elevation Azimuth

2° 247.0° –

-0.9° 236.3°

WMO Symposium

Toulouse 2005


Glyga l.jpg
GLYGA …

WMO Symposium

Toulouse 2005


Slide20 l.jpg

Wind direction, speed and headwind derived from on-board data from aircraft arriving at 0049 UTC.

24KT

GLYGA

head wind

profile

WMO Symposium

Toulouse 2005


Slide21 l.jpg

Pilot- data from aircraft arriving at 0049 UTC.

centered

Equipment-

centered

WMO Symposium

Toulouse 2005


Slide22 l.jpg

WMO Symposium data from aircraft arriving at 0049 UTC.

Toulouse 2005


Slide23 l.jpg

WMO Symposium data from aircraft arriving at 0049 UTC.

Toulouse 2005


Frequency distribution by month l.jpg

2nd peak data from aircraft arriving at 0049 UTC.

1st peak

Frequency Distribution by Month

  • Significant windshear: 1 in every 500 flights

  • Significant TURB: 1 in every 2,000 flights

WMO Symposium

Toulouse 2005


Windshear algorithms for automatic alerting based on lidar data l.jpg
Windshear algorithms for automatic alerting based on LIDAR data

  • Radial shear Alert Generation Algorithm (RAGA) - Adaptation of TDWR approach (shear along radar beams)

  • GLIde path shear alert Generation Algorithm (GLYGA) – Shear along glide paths

WMO Symposium

Toulouse 2005


ad