EDCS Registry - Browse

EA: ATM_CEILING_METHOD

Status:

STD 2005/06/07

Code:

113

Concept definition:

The method used to determine the <<ATM_CEILING>>.

Attribute value type:

ENUMERATION

Reference type:

Reference:

[GMET, "cloud height indicator"]

Supplemental references:

Enumerants (presented in a natural order)

1 / 1 Entries per page: 5 10 20 50 All Custom: 11 entries (displaying 1-11)

Status	Attribute label	Enumerant label ▾	Concept definition	Code	Ref type	Reference	Supplemental references
STD 2005/06/07	ATM_CEILING_METHOD	AIRCRAFT	By observation of the <<HEIGHT_AGL>> of the base of the lowest <CLOUD> from an <AIRCRAFT>.	1	IR	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":A]
STD 2005/06/07	ATM_CEILING_METHOD	BALLOON	By observing the ascent of a balloon and the <<HEIGHT_AGL>> at which it disappears into the lowest <CLOUD>.	2	IR	[WMO8, 15.5, "MEASUREMENT OF CLOUD HEIGHT BY BALLOON"]	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":B]
STD 2005/06/07	ATM_CEILING_METHOD	CLOUD_OBSERVATION	By observing the vertical distance to the base of the lowest <CLOUD>; cloud observation.	3	IR	[WMO8, 15.2.3, "Estimation of cloud height"]
STD 2005/06/07	ATM_CEILING_METHOD	ESTIMATED	By estimating the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>; estimated.	4	IR	[WMO8, 15.2.3, "Estimation of cloud height"]	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":E]
STD 2005/06/07	ATM_CEILING_METHOD	LASER_CEILOMETER	By measuring the <<TIME_QUANTITY>> taken for a pulse of coherent light to travel from a transmitter to the base of the lowest <CLOUD> and return to the receiver; laser ceilometer.	5	IR	[WMO8, 15.7, "LASER CEILOMETER"]
STD 2005/06/07	ATM_CEILING_METHOD	MEASURED	By measurement of the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>.	6	IR	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":M]	[SOED, "measured"]
STD 2005/06/07	ATM_CEILING_METHOD	MODELLED	By modelling, using numerical methods, the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>; modelled.	7
STD 2005/06/07	ATM_CEILING_METHOD	OBSCURATION_LIMIT	By the reported <<HEIGHT_AGL>> limit of <<VISIBILITY_DISTANCE>> into a surface-based obscuration.	8	IR	[WMO8, 15.1.4.1, "Cloud amount"]	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":W]
STD 2005/06/07	ATM_CEILING_METHOD	RADAR	By measuring the time taken for a radar pulse to travel from a transmitter to the base of the lowest <CLOUD> and return to the receiver.	9	IR	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":R]
STD 2005/06/07	ATM_CEILING_METHOD	ROTATING_BEAM_CEILOMETER	By measurement of the angle of elevation of a light beam scanning the vertical plane, at the instant at which a proportion of the light scattered by the base of the lowest <CLOUD> is received by a photoelectric cell directed vertically upwards at a known distance from the light source; rotating beam ceilometer.	10	IR	[WMO8, 15.6, "ROTATING-BEAM CEILOMETER"]
STD 2005/06/07	ATM_CEILING_METHOD	STATISTICALLY_DERIVED	By deriving, using statistical methods, the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>; statistically derived.	11	IR	[JMCDM, "SKY-CONDITION-OBSERVATION ceiling determination code":C]

1 / 1 Entries per page: 5 10 20 50 All Custom: 11 entries (displaying 1-11)

Group membership:

In addition to the status and date information for each entry, a colour coding scheme highlights the database holding to which an entry belongs. The following highlight colours are used:

white - the entry is in the standard
yellow - the entry has been added to the register
pink - the entry has been submitted for inclusion in the register, but it is not approved
cyan - a deprecated entry that was originally either in the standard or was added to the register, but has since been deprecated

The following icons are used to identify items that have figures, modifications and/or clarification notes:

F n - has Figures and, if more than one figure, n figures
M - has Modifications
C - has Clarifications

Send mail to webmaster with questions or comments about this web site.