A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Back to: "P"

PRFG
Usado para
partial fog
Fonte1
WORLD METEOROLOGICAL ORGANIZATION. Manual on codes: international codes: volume I.2: annex II to the WMO technical regulations: parte B: binary codes. parte C: common features to binary and alphanumeric codes. Geneva, 2015. (WMO, n.306).
Fonte2
INTERNATIONAL CIVIL AVIATION ORGANIZATION. Manual of aeronautical meteorological practice. 10th. ed. Montreal, 2015. (Doc. 8896 AN/893).
Contexto
In fully automatically generated reports, qualifier FZ shall only be used to report freezing fog (FZFG) in a situation with subzero temperatures (< 0° C) and a horizontal visibility of < 1 000 metres, whether rime ice is deposited or not. Fog types PRFG, BCFG, MIFG and VCFG cannot be detected by the system.
The letter abbreviation BCFG shall be used to report fog patches and the letter abbreviation PRFG to report fog covering part of the aerodrome; the apparent visibility in the fog patch or bank shall be less than 1 000 metres, the fog extending to at least two metres above ground level.
The visibility representative of the whole aerodrome is therefore unknown. Conversely, if partial fog is located 2 000 m from the observer as shown in Figure A3-1 b), with a visible mark at 2 000 m, the observer indicates a visibility of 2 000 m, even though visibility in the partial fog is much less (for example, 300 m indicated by a sensor).
Português
nevoeiro parcial