osi3::EnvironmentalConditions::CloudLayer Struct Reference

Description of a cloud layer. More...

Collaboration diagram for osi3::EnvironmentalConditions::CloudLayer:

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

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