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DIESER TEXT DIENT DER NAVIGATION
AUSTRO CONTROL
FLYING IN THE ALPSPRODUCTS FOR GENERAL AVIATION
Erstellt durch: Andreas PfoserVersion: 1.0Datum: 18. März 2010Datei: schoenhagen.ppt
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PRODUCTS PREPARED FOR ALL PARTS OF GENERAL AVIATION (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
– GAMET SECN I (abbreviated plain language)
– GAMET SECN II (chart form)
charts SIGWX phenomena („low-level significant weather chart“)
charts upper W / upper-air T
charts QNH / Foehn potential
ADDITIONAL PRODUCTS (SPECIALIZED FORECASTS)
– GAFOR (visibility / cloud base categories; route segments)
– ALPTHERM (atmospheric convection over complex topography)
– BALLONMET (specific information for ballooning flights)
– TEXT BULLETINS (overview forecasts in german language)
MODULAR CONCEPT
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GAMET SECN I (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Content:
– Information on en-route weather phenomena hazardous to low-level flights up to FL 200
– Information of meteorological conditions which could adversely affect general aviation airfields
Area of interest:
FIR Wien divided into three sub-areas (climatological aspects)
MODULAR CONCEPT
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GAMET SECN I (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Times of Issue / Validity Periods:
– 4 times per day, every 4 hours
– Forecasts are disseminated one hour prior to the beginning of validity period
– issue 05 lct: validity period 06/12 lct
– issue 09 lct: validity period 10/16 lct
– issue 13 lct: validity period 14/20 lct
– issue 17 lct: validity period 18/24 lct
– during the night (23/06 lct) density of traffic operating at low levels is not sufficient to warrant the issuance of GAMET information
MODULAR CONCEPT
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GAMET SECN I (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Phenomena included in GAMET SECN I:– SFC WSPD widespread surface gusts > 30 kt (below 3000 ft amsl)– SFC VIS widespread surface visibility < 5 km (below 3000 ft amsl)– SIGWX isol-frq/obsc/embd/sql TS/TSGR; hvy DS/SS; VA– MT OBSC widespread mountain obscuration
I. frontal system / low-pressure-area / upper-level-trough
II. ST obscuring pre-alps mt passes or small peaks inside basins
III. ovc CU along ridges, base blw peaks / IV. orographic clouds
– SIG CLD isol-sql CB/TCU or widespread low stratus < 1500 ft agl– ICE mod or sev (except for occurring in convective clouds) – TURB mod or sev (except for occurring in convective clouds)– MTW mod or sev downdrafts due to mountain waves
MODULAR CONCEPT
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GAMET SECN I (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Examples:
MODULAR CONCEPT
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Set of Fixed Time Forecast Charts:
– Forecasts of Upper Wind and Upper-Air Temperature
– Forecasts of SIGWX phenomena
– special chart „Foehn potential“
MODULAR CONCEPT
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
SIGWX phenomena LLSWC („ALPFOR AUSTRIA“):
– covers layer between GND and FL200
– issue 05 lct: charts 08 lct + 12 lct + outlook 16 lct
– issue 09 lct: charts 12 lct + 16 lct + outlook 20 lct
– issue 13 lct: charts 16 lct + 20 lct + outlook 24 lct
– issue 17 lct: chart 20 lct + outlook 24 lct
– issue 21 lct: chart tomorrow 08 lct + outlook 12 lct
– pressure centres, fronts
– cloud information, precipitation, vis-reducing phenomena
– surface visibility, surface wind
– weather phenomena hazardous to low-level flights en-route
MODULAR CONCEPT
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
SIGWX phenomena LLSWC („ALPFOR AUSTRIA“):
MODULAR CONCEPT
CBtops FL390
TCUtops FL220
height of base and top layer
amount:FEW 1/8-2/8SCT 3/8-4/8BKN 5/8-7/8OVC 8/8
characteristics:CONS continuousLYR layeredEMBD embedded
types:CU, SC, ST, NS, AS, AC, AC LEN
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
SIGWX phenomena LLSWC („ALPFOR AUSTRIA“):
MODULAR CONCEPT
types of icing:OPA rime type of ice formationCLA clear type of ice formationMX mixed type of ice formation
types of turbulence:LLVL low levelRDGE ridgeLEE leewardCAT clear air turbulence
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
ALPFOR AUSTRIA Examples:
MODULAR CONCEPT
winter weather in the eastern alps
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
ALPFOR AUSTRIA Examples:
MODULAR CONCEPT
foehn and thunderstorms in the eastern alps
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Upper Wind and Upper-Air Temperature / Freezing-Level:
issue 11-12 lct:
17 charts „barbs“ for 48hr in advance
17 charts „tabular“ for 48hr in advance
MODULAR CONCEPT
issue 23-24 lct:17 charts „barbs“ for 48hr in advance17 charts „tabular“ for 48hr in advance
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GAMET SECN II (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
Forecast QNH („FOEHN-Potential“):
issue 11-12 lct / 23-24 lct:
17 charts „barbs“ for 48hr in advance
17 charts „tabular“ for 48hr in advance
MODULAR CONCEPT
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GAFOR (VFR)
Content:
– Forecasts of visibility / cloud base categories O, D, M, X for well-defined route segments (published in the AIP)
– routes are „adverse weather routes“
– cloud base information refers to reference heights (mountain passes)
Times of Issue / Validity Periods:
– 3 to 4 times per day, every 3 hours
– issue 0730 lct: validity period 08/14 lct
– issue 1030 lct: validity period 11/17 lct
– issue 1330 lct: validity period 14/20 lct
– issue 1630 lct: validity period 17/23 lct (only during spring and summer)
MODULAR CONCEPT
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GAFOR (VFR)
Content:
– 3 time-segments of 2 hours
additional information:
weather phenomena, which are
expected to cause the adverse
visibility / cloud base conditions
– TS
– SN
– RA (mod or hvy)
– SHSN
– SHRA (mod or hvy)
– LC
– FG
– BR
MODULAR CONCEPT
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GAFOR (VFR)
Examples:
MODULAR CONCEPT
mountainous effects:windward side snowingleeward side flying
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ALPTHERM (Gliding/Hanggliding/Paragliding)
„a model for atmospheric convection over complex topography“
– mountainous characteristics: valley volume effect, area/height-distributions, elevated convection, various albedo, mountain-valley wind systems
– initialization with model profiles and local surface observations
– coupled with high-resolution mesoscale modell
MODULAR CONCEPT
- 31 regions (climatological aspects)
- 2-day-forecasts
- 3 updates in the morning- 1 update in the late afternoon
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ALPTHERM (Gliding/Hanggliding/Paragliding)
Content:
– quality of thermals (based on forecast PFD)
– strength of thermals (mean climb rates)
– onset of thermals
– height of the thermal updraughts
– possible updraughts for ridge soaring
MODULAR CONCEPT
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ALPTHERM (Gliding/Hanggliding/Paragliding)
Content:
MODULAR CONCEPT
time-altitude cross sections of- predicted climb rates- depth of the CBL- possible ridge soaring updraughts
diurnal evolution of- cumulus clouds (base and tops)- stratiform clouds (low, middle, high
levels cloud amount)- hazards (thunderstorms, rain/snow,
turbulences)
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BALLONMET (Ballooning)
Content:
– clouds, moisture
– surface wind and detailled upper wind
– turbulences, inversion layer
– precipitation
– surface temperature
MODULAR CONCEPT
common ballooning sites
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BALLONMET (Ballooning)
Content:
hazards:
– thunderstorms, convective showers
– thermals
– strong surface gusts
– fog
MODULAR CONCEPT
common ballooning sites
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ADDITIONAL MATERIAL (IFR light, VFR, Gliding/Hanggliding/Paragliding, Ballooning)
MODULAR CONCEPT
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