osi3::EnvironmentalConditions::CloudLayer Struct Reference

Description of a cloud layer. More...

Collaboration diagram for osi3::EnvironmentalConditions::CloudLayer:

Public Types

enum	FractionalCloudCover { FRACTIONAL_CLOUD_COVER_UNKNOWN = 0, FRACTIONAL_CLOUD_COVER_OTHER = 1, FRACTIONAL_CLOUD_COVER_ZERO_OKTAS = 2, FRACTIONAL_CLOUD_COVER_ONE_OKTAS = 3, FRACTIONAL_CLOUD_COVER_TWO_OKTAS = 4, FRACTIONAL_CLOUD_COVER_THREE_OKTAS = 5, FRACTIONAL_CLOUD_COVER_FOUR_OKTAS = 6, FRACTIONAL_CLOUD_COVER_FIVE_OKTAS = 7, FRACTIONAL_CLOUD_COVER_SIX_OKTAS = 8, FRACTIONAL_CLOUD_COVER_SEVEN_OKTAS = 9, FRACTIONAL_CLOUD_COVER_EIGHT_OKTAS = 10, FRACTIONAL_CLOUD_COVER_SKY_OBSCURED = 11 }
	Defines the fractional cloud cover [1] given by observation of total cloud amount in eights (oktas) of the sky. More...

Public Attributes

optional FractionalCloudCover	fractional_cloud_cover = 1
	Properties of a cloud layer given by fractional cloud cover levels. More...

Detailed Description

Description of a cloud layer.

Member Enumeration Documentation

◆ FractionalCloudCover

enum osi3::EnvironmentalConditions::CloudLayer::FractionalCloudCover

Defines the fractional cloud cover [1] given by observation of total cloud amount in eights (oktas) of the sky.

For visual alignment please see reference [2].

The total degree of coverage indicates how much of the sky is covered with clouds altogether. 0 oktas means that there are no traces of clouds in the sky, 8 oktas means that the sky is completely covered with clouds and no sky blue can be recognized.

References:: [1] CIE engl. International Commission on Illumination. (2020). CIE S017:2020 ILV: Intl. Lighting Vocabulary, 2nd edn.. Retrieved March 8, 2022, from https://cie.co.at/eilvterm/17-29-116
[2] UBC The University of British Columbia. (2018). ATSC 113 Weather for Sailing, Flying & Snow Sports. Retrieved March 8, 2022, from https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/01-met_concepts/01c-cloud_coverage/index.html

Enumerator
FRACTIONAL_CLOUD_COVER_UNKNOWN	Fractional cloud cover level is unknown (must not be used in ground truth).
FRACTIONAL_CLOUD_COVER_OTHER	Other (unspecified but known) fractional cloud cover level.
FRACTIONAL_CLOUD_COVER_ZERO_OKTAS	0/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_ONE_OKTAS	1/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_TWO_OKTAS	2/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_THREE_OKTAS	3/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_FOUR_OKTAS	4/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_FIVE_OKTAS	5/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_SIX_OKTAS	6/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_SEVEN_OKTAS	7/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_EIGHT_OKTAS	8/8 of the sky is covered with clouds.
FRACTIONAL_CLOUD_COVER_SKY_OBSCURED	Sky obscured, describes situations where the sky is not perceivable, e.g. in dense fog.

Member Data Documentation

◆ fractional_cloud_cover

optional FractionalCloudCover osi3::EnvironmentalConditions::CloudLayer::fractional_cloud_cover = 1

Properties of a cloud layer given by fractional cloud cover levels.

osi_environment.proto