New descriptor for OLCI classification and quality; BUFRCREX_CodeFlag_en_40.csv
Opened this issue · 5 comments
Initial request
Proposal for the new BUFR descriptor to represent OLCI classification and quality. This is to support assimilation of the OLCI data in NWP models.
Amendment details
1. Add a new element in table B 0-40-081 for OLCI classification and quality
| F X Y | ELEMENT NAME | UNIT | SCALE | REFERENCE VALUE | DATA WITH (bits) |
|---|---|---|---|---|---|
| 0-40-081 | OLCI Level 1 classification and quality | Flag table | 0 | 0 | 31 |
2. Add a new CODE/FLAG TABLE 0-40-081 for OLCI Level 1 classification and quality
| Bit No | OLCI Level 1 classification and quality |
|---|---|
| 1 - 17 | Reserved |
| 18 | Land |
| 19 | Coastline |
| 20 | Fresh inland water |
| 21 | Tidal regions |
| 22 | Preliminary Cloud |
| 23 | Stray light risk |
| 24 | Invalid |
| 25 | Cosmetic |
| 26 | Duplicated |
| 27 | Sun glint risk |
| 28 | Dubious |
| 29 | Saturated |
| 30 | Partly saturated |
| All 31 | Missing |
3. Add to abbreviation table
OLCI - Ocean and Land Colour Instrument
Comments
No response
Requestor(s)
Enter list of requestors.
Stakeholder(s)
Copernicus EU
Copernicus Atmosphere Monitoring Service (CAMS)
Publication(s)
Example: Manual on Codes (WMO-No. 306), Volume I.2, BUFR, BUFRCREX_CodeFlag_en_40.csv
Expected impact of change
MEDIUM
Collaborators
No response
References
No response
Validation
No response
https://github.com/wmo-im/tt-tdcf/wiki/2024.10.15.tt.tdcf notes:
- add link to documentation in issue
- add OLCI to abbreviation table
- Jeff recommends using bits 16-30 to optimize compression
- change units to flag table from numeric (typo)
- create sample for validation
olci.zip
Sample BUFR file and decoded message
https://github.com/wmo-im/tt-tdcf/wiki/2024.11.13.tt.tdcf notes:
- Marijana updated the proposal based on feedback from last meeting and added samples
- @marijanacrepulja will update the branch
- @antoinemerle will validate
Hi @antoinemerle I have updated branch and samples. Your help with validation is greatly appreciated :)
https://github.com/wmo-im/et-data/wiki/2024.12.04.et.data notes:
branch is udpated: ready for validation