Some standard content:
ICS07.060
YHKAi-cJOuaKA
Meteorological Industry Standard of the People's Republic of China
QX/T517—2019
Data format for acid rain observations-BUFR2019-12-26 Issued
China Meteorological Administration
2020-04-01 Implementation
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Normative reference documents
Terms and definitions
Abbreviations
Coding structure
Coding rules
Indication section
Identification section
Selected section
Data Description section
Data section
End section
Appendix A (Normative Appendix)
References
Code table
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QX/T517—2019
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This standard was drafted in accordance with the rules given in GB/T1.1—2009. This standard was proposed and managed by the National Technical Committee for Standardization of Basic Meteorological Information (SAC/TC346). The drafting units of this standard are: National Meteorological Information Center, Meteorological Observation Center of China Meteorological Administration. The main drafters of this standard are: Liu Guaiguai, Wang Ying, Xue Lei, and Jia Xiaofang. QX/T517-2019
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1 Scope
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Acid rain meteorological observation data format
This standard specifies the BUFR coding structure and rules for acid rain observation day data. This standard applies to the representation and exchange of acid rain observation day data. 2 Normative references
QX/T517-2019
The following documents are indispensable for the application of this document. For any dated referenced document, only the dated version applies to this document. For any undated referenced document, its latest version (including all amendments) applies to this document. GB/T19117—2017
Acid rain observation specification
QX/T1292011 Naming of meteorological data transmission files 3 Terms and definitions
The following terms and definitions apply to this document. 3.1
Acid rainacid rain
Atmospheric precipitation with a pH value less than 5.60.
Note: Atmospheric precipitation includes liquid precipitation, solid precipitation and mixed precipitation. [GB/T19117—2017.Definition 3.1]
Octet
A unit system in the computer field that consists of 8 bits as a group. [QX/T427—2018,Definition 2.1]
4 Abbreviations
The following abbreviations apply to this document.
BUFR: Binary Universal Form for Representation of meteorological data
CCITTIA5: Consultative Committee on International Telephone and Telegraph International Alphabet No. 5) UTC: Universal Time Coordinated (Universal Time Coordinated) [QX/T427—2018, Chapter 3]
Coding structure
The coded data consists of an indication segment, an identification segment, a selection segment, a data description segment, a data segment and an end segment, as shown in Figure 1. 1
QX/T517—2019
Indication segment
[QX/T 427—2018, Chapter 4]
6 Coding rules
6.1 Indication segment
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Identification segment
Selected segment
Description segment
Data segment
BUFR coded data structure
End segment
Consists of 8 octets. Including the start flag of the coded data, the total length of the coded data and the BUFR version number. See Table 1 for specific coding and description.
Indicator segment coding and description
Octet sequence number
Start mark of coded data
Total length of coded data
BUFR version number
[QX/T427—2018,5.1]
6.2 Identifier segment
Actual value
Encoded according to CCITTIA5
In octets
BUFR version 4 released by WMO
Consists of 23 octets, including the length of the identifier segment, the main table number, the data processing center, the data processing sub-center, the update sequence number, the selection segment indication, the observation data type, the observation data sub-type, the local data sub-type, the main table version number, the local table version number, the data encoding time and other information. The specific coding and description are shown in Table 2.
：Identification segment coding and description
Octet sequence number
Identification segment length
Main table number
Data processing center
Data processing subcenter
Update sequence number
Actual value
The identification segment length is 23 octets
The main table is the scientific discipline classification table defined by WMO for table-driven coding. The main table number 0 indicates that BUFR coding uses the code table of meteorological disciplines
According to WMO regulations, 38 indicates that the data processing center is Beijing, indicating that it has not been processed by the data processing subcenter
The value is a non-negative integer, and the initial number is 0. With each data update, the sequence number is incremented by 1
Octet sequence number
Selected segment
Selected segment indication
Observed data type
Observed data subtype
Local data subtype
Master table version number
Local table version number
Custom
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Identification segment coding and description (continued)
Actual value
Actual value
Actual value
Actual value
Actual value
Actual value
QX/T517—2019
0 means that this data format does not contain the selected segment, 1 means that this data format contains the selected segment
Indicates that the observed data type is physical/chemical compositionIndicates that the observed data subtype is acid rain
Indicates that no local data subtype is defined
Indicates that the version number of the meteorological discipline code table used by BUFR coding is 29
Indicates that the local table version number is 1
Actual data coding time (UTC): year, four digitsActual data coding time (UTC): month
Actual data coding time (UTC): day
Actual data coding time (UTC): hour
Actual data coding time (UTC): minute
Actual data coding time (UTC): second
Consists of the selected segment length, reserved fields, and the content customized by the domestic editing and reporting center and the data processing center or sub-center. See Table 3 for specific coding and description.
Octet sequence number
Selected segment length
Reserved field
Domestic reporting center code
Data processing center or sub-center
Data description segment
Selected segment coding and description
Actual value
In octets
Should comply with the provisions of Table A.13 Domestic reporting center code (CCCC) in Appendix A of QX/T129-2011
Indicates that it starts from the 8th octet and the length can be extended as needed
It consists of 9 octets, including the data description segment length, reserved fields, number of observation records, data nature and compression method, and descriptor sequence. See Table 4 for specific coding and description.
QX/T517-2019
Octet sequence number
6.5Data segment
Data description segment length
Reserved fields
Number of observation records
Data properties and compression method
Descriptor sequence
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Data description segment encoding and description
Actual value
322192
The length of the data description segment is 9 octets
The value is a non-negative integer, indicating the number of observation records contained in the data description segment
indicates that this data is observation data, encoded in BUFR uncompressed mode
3: indicates that the descriptor is a sequence descriptor
22: indicates precipitation chemical report sequence
192: indicates the 192nd category defined in the "Chemical and Aerosol Sequence", that is, the "Element Sequence of Acid Rain Observation Data" is composed of the data segment length, reserved fields and the code values corresponding to the meteorological element sequence contained in the descriptor 322192 in the data description segment. The specific coding and description are shown in Table 5. The data segment length is determined according to the meteorological elements actually contained in the encoding. The meteorological element sequence includes station information, time element information, observation data, acid rain observation notes, etc. Table 5
Data segment length
Reserved fields
1. Station information
002001
001101
001192
301021
007030
Data segment length
WMO region code
WMO station code
Station type
Country and region identifiers
Local station identifier
Station ground height above mean sea level
Data segment coding and description
Factor"||tt ||Baseline value
9000000
18000000
Digit. For the meaning of the digit, see Table A.1 in Appendix A
Digit. For the meaning, see Table
Character. Stations in non-WMO area use this descriptor to indicate the station number
Digit, keep 5 decimal places
Digit, keep 5 decimal places
2. Time element information
301011
133000
031000
105002
004 004
004002
004003
3. Observation data
118000
031001
Year (UTC)
Month (UTC)
Day (UTC)
Hour (UTC)
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33 descriptor delay
Number of repetitions
31 descriptor delay
Number of repetitions
1.5 after 05002| |tt||The coded value of the descriptor is repeated
twice
Year (UTC)
Month (UTC)
Day (UTC)
Hour (UTC)
Minute (UTC)
18 descriptors are delayed
0.31001. The next 18 descriptors are repeated
twice
Data segment coding and description (continued)
Factor"
Base value
No coded value
QX/T517—2019
Digital. If there is no precipitation on that day, the delay
repetition factor is set to 0; if there is precipitation, the delay
repetition factor is set to 1
no coded value
number. If there is precipitation on that day but the
sample is missed, the delay repetition factor is set to 0; otherwise
the delay repetition factor is set to 1
no coded value. The descriptor itself indicates
that the following 5 descriptors are repeated 2
times: According to Appendix G in GB/T19117-—2017
, the first repetition indicates the start time of a precipitation process, the second repetition indicates the end time of a precipitation process
no coded value
The first repetition indicates the temperature, pH value and conductivity of the precipitation sample at the initial measurement, and the second repetition indicates the temperature, pH value and conductivity of the precipitation sample at the re-measurement
QX/T517—2019
204008
031021
012001|| tt||202129
101003
013080
008023
013080
008023
202000
202130
101003
008023
013081
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Add an 8-bit additional field before all feature descriptors between descriptors 031021
and 204000 to indicate quality control information
Describe the associated field
precipitation sample temperature| |tt||Change the scale factor 1 of the descriptor 013080 to 2
The code value of 013080 is repeated
3 times
First-level statistics, the code value is
4. Indicates the average value
First-level statistics, the code value is
63, ending the
scope of 008023
End the
change operation on the scale factor
Change the scale factor 3 of the descriptor 013081 to 5
The code value of 013081 is repeated
3 times
Conductivity (K value)
First-level statistics, the code value is
4, indicating the average Mean
Conductivity (K value)
Data segment coding and description (continued)
Factor "
Baseline value\
No coded value. Before the precipitation sample temperature
, pH value, pH average value, conductivity
and conductivity average value, an 8-bit quality control information field
number is added respectively. The meaning of the number is as shown in Appendix A
No coded value
No coded value. It represents the
numbers of the 1st,
2nd and 3rd measured precipitation samples respectively. The meaning of the number is as shown in Appendix A
None coded value
No coded value
No coded value. Respectively represent the electrical numbers of the 1st, 2nd and 3rd precipitation samples. The meaning of the numbers is shown in Appendix A.1
Number. The meaning is shown in the table
in Appendix A. Stations in non-WMO regions use this descriptor to indicate the station number.
Number, keep 5 decimal places
Number, keep 5 decimal places
2. Time element information
301011
133000
031000
105002
004 004
004002
004003
3. Observation data
118000
031001
Year (UTC)
Month (UTC)
Day (UTC)
Hour (UTC)
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33 descriptor delay
Number of repetitions
31 descriptor delay| |tt||Number of repetitions
1.05002The coded values of the 5
descriptors after this are repeated
twice
Year (UTC)
Month (UTC)
Day (UTC)
Hour (UTC)
Minute (UTC)
18 descriptors delayed
0.31001The 18
descriptors after this are repeated
twice||Data segment coding and description (continued) ）
factor"
benchmark value
no coded value
QX/T517—2019
digit. If there is no precipitation on the day, the delay
repetition factor is set to 0; if there is precipitation, the delaybzxZ.net
repetition factor is set to 1
no coded value
digit. If there is precipitation on the day but the sampling is missed, the delay repetition factor is set to 0; otherwise, the delay repetition factor is set to 1
no coded value. Description The descriptor itself indicates
that the following 5 descriptors are repeated 2
times: According to Appendix G in GB/T19117-—2017
, the first repetition indicates the start time of a precipitation process, the second repetition indicates the end time of a precipitation process
no coded value
The first repetition indicates the temperature, pH value and conductivity of the precipitation sample at the initial measurement, the second repetition indicates the end time of a precipitation process. Repeat times represent the temperature, pH value and conductivity of precipitation samples at the time of repeated measurement
QX/T517—2019
204008
031021
012001
202129
101003
013080
008023
013080
008023
20 2000
202130
101003
008023
013081
YITKAa-JouaKAa
Add an 8-bit additional field before all element descriptors between descriptors 031021
and 204000 to indicate quality control information
describe the associated keyword The precipitation sample temperature of the segment
changes the scale factor 1
of the sketch
descriptor of 013080
to 2
the coded value of 013080 is repeated
3 times
first-level statistics, and the coded value is
4. Indicates the average value
first-level statistics, and the coded value is
63, ending the
scope of 008023
ending the
Change operation
Change the scale factor 3
of the sketch
descriptor 013081
to 5
The coded value of 013081 is repeated
3 times
Conductivity (K value)
level statistics, and the coded value is
4, indicating the average value
Conductivity (K value)
Data segment coding and description (continued)
Factor "
Baseline value\
No coded value. Add
8-bit quality control information field
number before the precipitation sample temperature
, pH value, pH average value, conductivity
and conductivity average value, respectively. The meaning of the numbers can be found in Appendix A
No coded value
No coded value. Respectively represent the 1st,
2nd, and 3rd measured precipitation samples
numbers, the meaning of the numbers is shown in Appendix A
numbers, the meaning of the numbers is shown in Appendix A
no coded value
no coded value
no coded value. Respectively represent the 1st,
2nd, and 3rd measured precipitation samples
numbers, the meaning of the numbers is shown in Appendix A1
Number. The meaning is shown in the table
in Appendix A. Stations in non-WMO regions use this descriptor to indicate the station number.
Number, keep 5 decimal places
Number, keep 5 decimal places
2. Time element information
301011
133000
031000
105002
004 004
004002
004003
3. Observation data
118000
031001
Year (UTC)
Month (UTC)
Day (UTC)
Hour (UTC)
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33 descriptor delay
Number of repetitions
31 descriptor delay| |tt||Number of repetitions
1.05002The coded values of the 5
descriptors after this are repeated
twice
Year (UTC)
Month (UTC)
Day (UTC)
Hour (UTC)
Minute (UTC)
18 descriptors delayed
0.31001The 18 descriptors after this are repeated
twice||Data segment coding and description (continued) ）
factor"
benchmark value
no coded value
QX/T517—2019
digit. If there is no precipitation on the day, the delay
repetition factor is set to 0; if there is precipitation, the delay
repetition factor is set to 1
no coded value
digit. If there is precipitation on the day but the sampling is missed, the delay repetition factor is set to 0; otherwise, the delay repetition factor is set to 1
no coded value. Description The descriptor itself indicates
that the following 5 descriptors are repeated 2
times: According to Appendix G in GB/T19117-—2017
, the first repetition indicates the start time of a precipitation process, the second repetition indicates the end time of a precipitation process
no coded value
The first repetition indicates the temperature, pH value and conductivity of the precipitation sample at the initial measurement, the second repetition indicates the end time of a precipitation process. Repeat times represent the temperature, pH value and conductivity of precipitation samples at the time of repeated measurement
QX/T517—2019
204008
031021
012001
202129
101003
013080
008023
013080
008023
20 2000
202130
101003
008023
013081
YITKAa-JouaKAa
Add an 8-bit additional field before all element descriptors between descriptors 031021
and 204000 to indicate quality control information
describe the associated keyword The precipitation sample temperature of the segment
changes the scale factor 1
of the sketch
descriptor of 013080
to 2
the coded value of 013080 is repeated
3 times
first-level statistics, and the coded value is
4. Indicates the average value
first-level statistics, and the coded value is
63, ending the
scope of 008023
ending the
Change operation
Change the scale factor 3
of the sketch
descriptor 013081
to 5
The coded value of 013081 is repeated
3 times
Conductivity (K value)
level statistics, and the coded value is
4, indicating the average value
Conductivity (K value)
Data segment coding and description (continued)
Factor "
Baseline value\
No coded value. Add
8-bit quality control information field
number before the precipitation sample temperature
, pH value, pH average value, conductivity
and conductivity average value, respectively. The meaning of the numbers can be found in Appendix A
No coded value
No coded value. Respectively represent the 1st,
2nd, and 3rd measured precipitation samples
numbers, the meaning of the numbers is shown in Appendix A
numbers, the meaning of the numbers is shown in Appendix A
no coded value
no coded value
no coded value. Respectively represent the 1st,
2nd, and 3rd measured precipitation samples
numbers, the meaning of the numbers is shown in Appendix AThe first repetition indicates the start time of a precipitation process, and the second repetition indicates the end time of a precipitation process. No coded value. The first repetition indicates the temperature, pH value and conductivity of the precipitation sample during the initial measurement, and the second repetition indicates the temperature, pH value and conductivity of the precipitation sample during the retest. QX/T517—2019
204008
031021
012001
202129
101003
013080
008023
0130 80
008023
202000
202130
101003
008023
013081
YITKAa-JouaKAa
Add an 8-bit additional field before all feature descriptors between descriptors 031021
and 204000 to indicate quality control information
Describe the associated field
precipitation sample temperature
Change the scale factor of the descriptor 013080 from 1 to 2
013080 The coded value is repeated
3 times
first-level statistics, and the coded value is
4. It represents the average value
first-level statistics, and the coded value is
63, which ends the
scope of 008023
ends the
change operation on the proportional factor
Change the proportional factor 3 of the sketch
descriptor of 013081
to 5
The coded value of 013081 is repeated
3 times
Conductivity (K value)
first-level statistics, and the coded value is
4, which represents the average value
Conductivity (K value)
Data segment coding and description (continued)
factor "
Baseline value\
Uncoded value. Before the precipitation sample temperature, pH value, pH average, conductivity, and conductivity average, an 8-bit quality control information field is added. The meaning of the number is as shown in Appendix A.
Uncoded value
Uncoded value. Respectively represent the numbers of the 1st,
2nd, and 3rd measurement of precipitation samples. The meaning of the number is as shown in Appendix A.
Non-coded value
No-coded value
No-coded value. Respectively represent the numbers of the 1st,
2nd, and 3rd measurement of precipitation samples. The meaning of the number is as shown in Appendix A.The first repetition indicates the start time of a precipitation process, and the second repetition indicates the end time of a precipitation process. No coded value. The first repetition indicates the temperature, pH value and conductivity of the precipitation sample during the initial measurement, and the second repetition indicates the temperature, pH value and conductivity of the precipitation sample during the retest. QX/T517—2019
204008
031021
012001
202129
101003
013080
008023
0130 80
008023
202000
202130
101003
008023
013081
YITKAa-JouaKAa
Add an 8-bit additional field before all feature descriptors between descriptors 031021
and 204000 to indicate quality control information
Describe the associated field
precipitation sample temperature
Change the scale factor of the descriptor 013080 from 1 to 2
013080 The coded value is repeated
3 times
first-level statistics, and the coded value is
4. It represents the average value
first-level statistics, and the coded value is
63, which ends the
scope of 008023
ends the
change operation on the proportional factor
Change the proportional factor 3 of the sketch
descriptor of 013081
to 5
The coded value of 013081 is repeated
3 times
Conductivity (K value)
first-level statistics, and the coded value is
4, which represents the average value
Conductivity (K value)
Data segment coding and description (continued)
factor "
Baseline value\
Uncoded value. Before the precipitation sample temperature, pH value, pH average, conductivity, and conductivity average, an 8-bit quality control information field is added. The meaning of the number is shown in Appendix A.
Uncoded value
Uncoded value. Respectively represent the numbers of the 1st,
2nd, and 3rd measurement of precipitation samples. The meaning of the number is shown in Appendix A.
Non-coded value
No-coded value
No-coded value. Respectively represent the numbers of the 1st,
2nd, and 3rd measurement of precipitation samples. The meaning of the number is shown in Appendix A.
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