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| title | Click here to expand the list of related documents (D1-D4) |
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Reference ID | Document | D1 | Climate Algorithm Theoretical Basis Document (C-ATBD) for Daily OLR CDR v01r02 https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/Outgoing%20Longwave%20Radiation%20-%20Daily/AlgorithmDescription_01B-21.pdf | D2 | Copernicus User Support Handbook, V2.1 ftp link to the handbook1 last accessed on 31/05/2022 | D3 | Clerbaux, N., Velazquez Blazquez, A., Baudrez, E., Aebi, C., Akkermans, T., 2022, C3S Product Quality Assurance Document - Earth Radiation Budget data from NOAA / NCEI HIRS OLR v01r02 (daily and monthly) C3S2_D312a_Lot1.1.2.1-v1.0_202103_PQAD_HIRS_OLR_v01r02 Available via : https://cds.climate.copernicus.eu/cdsapp#!/dataset/satellite-earth-radiation-budget?tab=doc | D4 | Lee, H.-T., 2018, Quality Assurance Results and Summary for Monthly and Daily OLR CDR (rev.20180831). http://olr.umd.edu/References/QA_Summary_OLR-Monthly_and_Daily_CDR_20180831.pdf |
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A script is run automatically each night (at 05:00 UTC) and any new files or changes to existing yearly files on the NOAA server are detected. In case of a new/updated file, the daily data corresponding to the relevant year are extracted using the command in the box below. In practice, this daily extraction concerns the preliminary files from which new data are available (approximately) each day and are added to the icdr part of the go-between server. Once per year, the preliminary data are replaced by final data, and in this case also the corresponding daily data are extracted and added to the tcdr part of the go-between server.
Command used to extract the daily HIRS OLR files
#!/bin/bash
YYYY=2008
MM=11
DD=07
OUT=data_312a_Lot1_hirs-olr-daily_tcdr_v1.2_olr_YYYY_MM_DD.nc
URL=https://www.ncei.noaa.gov/thredds/ncss/cdr/olr-daily
FILE=olr-daily_v01r02_${YYYY}0101_${YYYY}1231.nc
VAR="var=olr"
T_START="time_start=${YYYY}${MM}${DD}T00%3A00%3A00Z"
T_END="time_end=${YYYY}${MM}${DD}T23%3A59%3A59Z"
wget –O ${OUT} '${URL}/${FILE}?${VAR},${T_START}?${T_END}'
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Following this request and the retrieval of the daily data file onto the RMIB server, the following 3 global attributes within the NetCDF file have to be changed as the output file contains a single day of data and not the full year anymore. This is done using 'cdo' for the following variables which are changed from
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