|  | | Re: Re: Re: Prepocet z QFF na QNH 6. 2. 2007 / 10:50 | |
| | s QFF jsem se jako kodem nikdy nesetkal, ale nasel jsem neco zde:
http://www.auf.asn.au/groundschool/umodule3.html
QFF: the mean sea level [msl] pressure derived from the barometric pressure at the station location by calculating the weight of an imaginary air column, extending from the location to sea level, assuming the temperature and relative humidity at the location are the long term monthly mean, the temperature lapse rate is ISA and the relative humidity lapse rate is zero. This is the Australian Bureau of Meteorology method; QFF calculations differ among meteorological organisations. QFF is the location value plotted on surface synoptic charts and is closer to reality than QNH, though it is only indirectly used in aviation.
dale
The Q means a question or request for information.QDM meant a request for course to a station,QDR course from a station.A request for QNH gives you the altimeter setting that shows airfield elevation above MSL when on the ground,QFE is the altimeter setting that shows 0 feet when on the ground.The difference between QNH and QFE is called QFF,but this is never used in operations.
dale
QFE - station pressure at ground level
QFF - same as QFE but including a temperature correction
v souvislosti s teplotou jsem na http://134.176.128.63/ludru.html (v nemcine) nasel tabulku, ale abych pravdu rekl nechapu vyznam QFF kdyz se lita na 1013, QNH nebo QFE |
| |
|
