Open carstenhoyerklick opened 2 years ago
"Type" of solar radiation
* irradiation is an energy measured within a certain period of time (e.g. aggregated over an hour) * irradiance is a power at an instant. Irradiance integrated over time is an irradiation. * illuminace ist spectrally weighted irradiance focused on daylighting applications.
Things that you measure are neither energies nor processes but quantity values of some energies or processes, so these would be all in continuant
-> generically dependent continuant
-> information content entity
-> quantity value
. There we already have areal solar power density
(alternative term: irradiance
) and areal solar energy density
(alternative term: irradiation
). Concepts like direct normal irradiance
will probably be subclasses of these. Illuminance however is a completely new concept, at least I did not find this word in the OEO.
The "spatial distribution of radiation"
* direct radiation directly comes from the sun * diffuse radiation is reflected and scattered e.g. by air molecules or clouds * global radiation is the sum of direct and diffuse
These sound to me as different ways, the light travels from the sun through the atmosphere, so I assume, these processes are subprocesses of our more general solar radiation
class (Definition: Solar radiation is radiation that is emitted by the sun.).
Things that you measure are neither energies nor processes but quantity values of some energies or processes, so these would be all in
continuant
->generically dependent continuant
->information content entity
->quantity value
.
Usually, all quantity values should be related to their "entity in reality", which in the case of irradiation
seems to be solar radiation
.
With for energy transformation processes we introduced power
as process attribute. We could think about having irradiance
as its subclass, or directly link it to solar irradiation
as well.
By the way: I think radiation
should be classified as subclass of energy transformation
/ energy tranfser
.
By the way: I think
radiation
should be classified as subclass ofenergy transformation
/energy tranfser
.
I agree, but then it should be redefined to: Radiation is an energy transfer by emitting or transmitting energy in the form of waves or particles through a spatial region or a material entity.
I just discovered that we have a whole set of light units imported from the Units Ontology:
I just had a look on this issue. Not everything is solved, but at least I see an consensus to make radiation
as subclass of energy transfer
. To move forward, I will implement this part.
For UO imports see also #1690
Is there update on the state of this issue?
hopefully soon...
Description of the issue
We want to introduce a number of new terms regarding solar meteorology into the OEO. The first question we should discuss is, how to structure them into the ontology. The is a number issues associated with it:
"Type" of solar radiation
The "spatial distribution of radiation"
The way of measurement:
These properties can be combined, e.g. we have
The main questions is: Do we need to define all permutations of the three groups as separate terms
or can we define just the single words and can use combinations of the terms to annotate the data.
One further question: We have
Should we place energy related terms as irradiation in the first group and power related terms as irradiance in the second group? Or should we restructure this?
Ideas of solution
Option 1)
We just define the single words an can use combinations of it Optoin 2)
We need to have definitions for all permutations.
Workflow checklist
[x] I discussed the issue with someone else than me before working on a solution
[x] I already read the latest version of the workflow for this repository
[x] The goal of this ontology is clear to me
I am aware that