The general rules of the electronic data recording for field surveying
Some standard content:
The general rules of the electronic data recording for field surveying CH/T 2004--1999
1.1 This standard specifies the basic principles and methods for field recording using programmable electronic recorders (including electronic calculators and computers).
1.2 This standard applies to field electronic recording of geodetic surveys, various control surveys and other related surveys. 1.3 This standard should be used together with relevant survey standards. 1.4 The preparation of various field electronic recording standards for surveys should comply with the requirements of this standard. Various field electronic recording standards for surveys can be specially formulated or supplemented in the original survey standards. Their contents should include the following aspects: recording information items, contents and coding;
the processing contents and methods of observation data;
the information that must be recorded on the recording medium, the form of the recording medium and its various recording formats; d.
the functional requirements of the recording program.
1.5 Requirements for electronic recorders used for field observation records and the code of conduct for recorders shall be implemented in accordance with Appendix A and Appendix B (supplement) of this standard.
2 Terminology
Terms and terms defined and explained in this chapter apply only to this standard and relevant standards for field electronic records of measurements. 2.1 Recorder
An electronic device that automatically collects data through keyboard input or directly connected to a measuring instrument, and can process and transmit data through software control. Such as dedicated electronic recorders, programmable electronic calculators, pocket electronic computers, etc. 2.2 Measurement data and measurement information
Measurement information refers to all information recorded by field observations, including measurement data and other information. Measurement data specifically refers to observation data and its processing results. 2.3 Recording media
Media used to record measurement information. Such as storage modules, cassette tapes, printing paper tapes, etc. 2.4 Information identifiers and information content codes
Information identifiers are characters that represent the name of measurement information, which can be displayed and printed out for identification. Information content code is a character that indicates the content of measurement information, and is used for information recording, storage and transmission. 2.5 Title information
Information that describes the form, content, area, equipment, operation unit, personnel, measurement mark, etc. of the measurement operation. 2.6 Observation condition information
Refers to information such as time, imaging conditions, meteorological elements, etc. during the observation process. 2.7 Recording segment
Refers to the time period for obtaining a certain period of observation data and the corresponding observation condition information. National Surveying and Mapping Commission Approved on September 7, 1999
Implementation on September 7, 1999
2.8 Data description information
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Information that describes the meaning, nature, measurement sequence, and collection of measurement data. 2.9 Data item
The most basic and indivisible data unit of measurement information, which is composed of several characters, such as a certain information content code, observation reading, etc. 2.10 Records
Information collection composed of several data items according to certain purposes and meanings. 2.11 Files and file groups
A file is an information collection that describes a homogeneous whole, and it is composed of several records. A file group is the most basic information collection for completing field data processing, and it is composed of several files. For example, in leveling, the information collection on a measuring section recorded on the recording medium; in triangulation, the information collection on a measuring station recorded on the recording medium. 3 Recording and processing original measurements
3.1 Observation records
3.1.1 The content of observation records includes measurement title information, observation data, data description information, and observation condition information. 3.1.2 The method of collecting measurement data should follow the method specified in the measurement standard to be implemented. Any original data must be input into the recorder in real time in the specified form.
3.1.3 When recording with the recorder, it is not allowed to manually record, delete, modify or decide on the access of data. After the data is input into the recorder, it is prohibited to use any method to modify the data. 3.1.4 The observation condition information should be recorded in a record, a record segment, the beginning and end of a light segment, and when there are obvious changes in meteorological elements, equipment status, terrain and route, or changes in equipment, personnel and other conditions during the observation process. 3.2 Data Processing
3.2.1 The data processing of field observation records includes: data verification and calculation, statistics of observation parameters and quality assessment of results. 3.2.2 For each piece of input information, the recorder should analyze and verify it and refuse to receive erroneous information. 3.2.3 The recorder should be used for recording, and the observation data processing work should generally be completed by the recorder. Data processing should adopt mathematical models and methods suitable for computer processing.
3.2.4 The recorder should verify and control the observation data and observation process in accordance with the specified tolerances, limiting conditions, over-limit processing methods and inspection items. Due to the limitations of the recorder's functions, capacity and speed, items that cannot be verified can be processed manually, but the verified data records must be saved.
3.2.5 For the quality assessment of the results, mathematical models should be used as much as possible, and the recorder should give the assessment results. The quality assessment of the results should take into account the accuracy of the observation results and other relevant factors.
3.3 Save information
3.3.1 The field observation information finally saved on the recording medium can be in the following three forms: original information;
b. Processed information;
Original information and processed information.
The information saved on the recording medium should be as independent as possible. 3.3.2 The following types of information must be saved on the recording medium: a.
Data that should be saved for a long time as stipulated by the measurement standards implemented, b.
Data that cannot be processed in the field and data required for internal processing; c.
Field calculation results;
d. The name, code, implementation year and month of the relevant measurement standards implemented, the model and number of the recorder, the name, writing unit and designer of the recording program;
e. Measurement title information, observation condition information and data description information; 627
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. Data required for scientific research and possible future reprocessing of results. Useful information for scientific analysis and quality assessment of results should be counted as much as possible, such as the distribution statistics of the difference between secondary readings, see Appendix G (reference). 3.4 Digital processing
3.4.1 The form and number of digits of the data input into the recorder must be consistent with or corresponding to the observed data. 3.4.2 Numerical operations must ensure the specified accuracy. 3.4.3 When the final result of the observation data processing needs to be rounded off, it can be processed according to the method specified in Appendix C (supplement) of GB1.1-81 "General Provisions for the Preparation of Standards in the Guidelines for Standardization Work", or processed according to other methods that meet the accuracy requirements. 4 Requirements for the design and use of recording program libraries
4.1 Design principles
4.1.1 The input and output data formats, data processing content and methods, and calculation results of the recording program execution shall comply with the requirements of this standard and the corresponding measurement standards.
4.1.2 The recording program design shall adopt the recording prompt terms and operating instructions specified in Appendix F (reference) and the corresponding recording standards as much as possible. 4.1.3 The recording program requires safe operation, complete functions, appropriate speed, convenient operation, easy interaction, concise statements, reasonable structure, and flexible response.
4.2 Technical requirements for design
4.2.1 In the output information, it is not allowed to use information containing the variable name or storage unit name where the corresponding data is stored. The identifier of the information is not allowed to be used as the variable name for storing the code of the information content in the program. 4.2.2 Before executing commands, statements, and program segments that clear memory data and may change the retained data, a judgment opportunity should be given, or control measures should be added.
4.2.3 When the program is in the paused state, if a key of the recorder is accidentally touched, such as touching the OFF, ON, MODE, ★, ENTER keys on the PC-1500 computer, which interrupts the normal operation of the program, the program should have the function of restoring the original state or a state similar to it; or the program should have protection measures to make the accidental key touch ineffective. 4.2.4 The program should have the function of logical judgment of input information and refuse to accept illogical information. For example, if non-negative data is input as a negative value, the number of characters input exceeds the specified number of digits, and the information input does not conform to the operating procedures, it should be refused. 4.3 Submit technical information
In order to review, file and use the recording program, the programmer must submit the following information: recording operation manual;
Program maintenance manual;
Program logic manual.
4.3.1 Recording operation manual
This manual can be used by recorders and other personnel, and can also be used for review and filing. This manual may include the following contents:
Requirements for recorders;
Maintenance requirements for recorders and their external devices; How to use the recorder buttons and external devices involved in the recording operation; c.
The purpose and scope of application of the recording program;
The information input method and the meaning of the output information involved in the recording operation; e.
Recording operation steps and examples.
4.3.2 Program maintenance manual
This manual is for the use of inspectors and program review and filing. This manual may include the following contents:
Keys and technical measures prohibited from use in the recorder: a.
Program loading, recording and verification methods;
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—1999
When the program function changes, the setting of control parameters and the change of statements; d.
Program capacity and required data area capacity; How to use the operation instructions for inspection and the recorder hardware and software verification methods. 4.3.3 Program logic manual
This manual is for review and filing.
This manual should include the following contents:
Program function introduction;
Observation and processing methods used in writing programs and relevant materials based on them; b.
Detailed program flow chart;
Recorder memory allocation table:
Program list, with detailed functional description of each statement or a section of statement. The program flow chart graphic symbols shall be implemented in accordance with Appendix C. 4.4 Usage regulations
4.4.1 The recording procedure must be reviewed and approved by the production department. Unapproved recording procedures shall not be used in production. 4.4.2 The recording procedures for production shall not be modified without the approval of the production department. 4.4.3 The recording procedures in the recorder should generally be loaded by the inspector. In special circumstances, the recorder is allowed to load, but it must be approved by the production and technical management department of the operating unit.
4.4.4 At the beginning and end of the operation period, the inspector shall conduct a comprehensive inspection of the recording procedures in the recorder. If necessary, it can also be inspected during the operation and record it.
5 Recording medium form regulations
5.1 The recording medium of the field observation results should be convenient for information exchange, low cost and can be preserved for a long time. 5.2 The recording medium can be in one of the following three forms: a. Handbook with paper tape;
b. Paper tape;
C. Ordinary cassette tape.
If necessary, a form or handbook can be added.
Other types of information exchange recording media are allowed, such as storage modules or disks. 5.3 When using a notebook with paper tape, the paper tape shall only print the measurement data, and the paper tape shall be cut and pasted on the notebook. At the same time, the observation processing results on the paper tape shall be copied to the notebook.
5.4 The format of the notebook shall be 32-page with a specification of 787mm×1092mm. 5.5 The paper tape printed with the observation results shall be trimmed before it can be handed in. The printed handwriting shall be durable, water-resistant, complete and clear. 5.6 When using cassette tapes as recording media, important data on the tape must be printed on the paper tape, and the printing content shall be specified by the various field electronic record standards for surveying.
5.7 Cassette tapes and other small-capacity information exchange recording media are only used as intermediate data carriers. Their data must be dumped onto large-capacity information exchange recording media suitable for long-term preservation, and the results table should be printed out for archiving. 5.8 The results of observation and recording should generally be output after one or several stations have been completed. If the recorder has a small capacity and cannot store a file, you can also use the method of recording and printing while observing. 5.9 The cassette tape used in the field to record the observation results must be of high quality. For the selection and storage requirements of cassette tapes, see Appendix A (Supplement).
5.10 After recording the observation results on the cassette tape, the data on the tape must be read back into the recorder and compared with the original data in the memory; if errors are found, they should be re-recorded.
6 Method of indicating measurement information
6.1 Information indicating form
CH/T2004--1999
Measurement information indicating forms are divided into identifiers, content codes, data and character strings, which can be indicated on media (paper tape, magnetic tape, display screen, etc.) through the external devices of the recorder (display, printer, tape drive), and its input and output formats can be selected from the following four forms: identifier or character string;
b. Content code or data
c. Identifier identifier separator content code, data or character string d.
Identifier
Content code or data
Identifier separator can choose "two" """" (space), "_" four symbols. The identifier and content code of basic measurement information are shown in Appendix E (supplement). For the indication of operation, observation information and operation instructions for recorders and observers, see Appendix F (reference). The corresponding representation method of characters on the media shall be agreed upon according to the requirements of the recorder. 6.2 Code Selection
For graphic symbols that cannot be directly represented by the recorder (such as Chinese characters), the national standard code and the subject word code specified in Appendix D (Supplement) can be used, or the national standard code and the subject word code can be mixed. The national standard code uses the code specified in GB2312--80 "Basic Set of Chinese Character Codes for Information Exchange" (the code has four digits, the upper two digits are the area code, and the lower two digits are the bit number).
6.3 Code Identification
6.3.1 "()", \)\ is the national standard code identifier, and the national standard code string is between "(" and \)\. 6.3.2 "()", ")" are the subject code identifiers, and the subject code string is between "(" and \)". 6.3.3 "+" is the code synthesis identifier. When several codes represent a graphic character, they should be connected by "+". 6.3.4 The code without identifier is the original character. The original character in the code string shall not use the code identifier. 6.4 Usage rules
6.4.1 For information to be represented by national standard code and subject code, it is allowed to use the code after the abbreviation of the information character and the code of the abbreviation of the measurement unit without losing the meaning of the information. 6.4.2 All numerical values represented by Chinese characters can be represented by corresponding numbers, such as " can be represented by "1". 6.4.3 When the length of the code used exceeds the specified number of digits, the code of the abbreviation information should be used. 6.4.4 The content codes can be combined with each other, but the characters of the same content code cannot be separated. Basic format of carrier record
The basic format of carrier record stipulates the basic structure and output rules of recording observation results on carriers such as paper tape and magnetic tape. The detailed record format is specified by each field electronic record standard for measurement. 7.1 Basic structureWww.bzxZ.net
The file group recorded on the record carrier is divided into the title area, record area, result area and appendix area in sequence. As shown in the following figure: Title area
Record area
Result area
Record area
According to the actual situation, the arrangement order of the record area and the result area can be adjusted appropriately. The record content can be recorded in the corresponding area according to its category. According to the record content, some areas can be added or reduced. 7.1.1 Title area (Table 1)
Record structure
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Record content
Record fixed description information in multiple file groups. Includes the following contents: a. Survey code, survey year;
b. Name and code of the survey standard implemented, main title area
subtitle area
7.1.2 Record area (Table 2)
c. Name of the adopted recording procedure, design unit and designer; d. Operation unit, group number, observer and recorder, e. Information about the survey area;
f. Others.
Records fixed description information in a file group. Includes the following contents: a. Record number, survey level, method: b. Description information of the survey station or survey section and target point: C. Description information of the survey mark:
d. Record size, sequence description information
e. Others.
According to the record output form, the record area structure is divided into two forms: index record and sequence record. Whenever the observation results are output after completing a survey station or a survey section, the index record form must be used. Table 2
Record type
Record structure
Condition information segment 1
Observation data segment 2
Condition information partition
Observation data partition
7.1.3 Result area and appendix area (Table 3)
Record structure
Result area
Appendix area
Record content
Record observation time, meteorological elements (weather, temperature, air pressure, wind direction, wind force, etc.), imaging conditions and others. Record observation data and data description information, such as qualified or invalid, basic, re-measurement, or supplementary measurement, forward or return measurement, direction number, measurement number or station number and other information. The observation data segment includes several data segments. The condition information segment and the observation data segment are in the order of observation records. The condition information partition includes several condition information segments. The companion information segment also includes the observation data sequence number when recording the condition information.
The observation data partition includes several data segments, and they are arranged in the specified order. Table 3
Record the observation data processing results and accuracy assessment results. The inner
can be used as a spare data area to record the content not included in the previous areas. This area may include the following contents:
a. The number of times each item exceeds the limit, the statistical results of parameters and the results of quality assessment; b. Control and record the parameters of the program operation (such as tolerance); C. The number of times each operation instruction is used and the information of the operation steps recorded; d. The memory data and program capacity of the recorder; e: Others.
7.2 Recording rules
7.2.1 Printing output
CH/T2004—1999
The information printed out shall generally include the information identifier. When printing information with a large number of similar information, the identifier may not be printed, but the printed information shall be arranged neatly according to certain rules. According to the number of characters in the information, the printing format may select several formats specified in 6.1. In order to make the printing result clear, beautiful, neat and easy to decorate, it may be appropriately modified according to the characteristics of the specific information and the width of the printing paper, such as printing at an appropriate position in a line, selecting an appropriate line spacing, adding appropriate table lines, etc. For the printed numerical values, when the units of the quantities need to be printed, the unit symbols specified in GB3100~~3102-82 should be used as much as possible. For Greek letters that cannot be printed, the first two letters of the English name can be used to replace them. For character strings printed with national standard codes and subject word codes, handwritten Chinese characters should be used to annotate; the codes can also be omitted, but the information content must be indicated in Chinese characters after the printed information identifier. 7.2.2 Data file output
When using a recording medium for information exchange (such as a cassette tape), the information identifier is generally not recorded in the recording medium, and the storage type is divided into variable storage and storage unit storage. When storing by variables, character variables should be used as much as possible. When storing by storage unit, the ASCII code of the characters is used for storage, and each character occupies one byte. For numbers (0~~9) or characters from A to F, 8421 code can also be used for storage, and each character occupies half a byte.
Each file group should generally be divided into two data files. The title area is recorded in the record title file; the record area, result area, and appendix area are recorded in the observation record file. The record title file and the observation record file should generally be recorded on the same side of the cassette tape, and the observation record file should be recorded immediately after the record title file.
The tape number, recorder model, operation unit, file name, file start and end address and tape drive counter number must be indicated in the cassette tape card and tape box that record the observation results. The file name of the record title file is set to: XX XX XX
Storage type:
The first digit: 0-variable storage, 1-unit storage; measurement
The second digit: 0-internal code, 1-ASCII code, 2-8421 code 3-ASCII and 8421 mixed code, 4-other. The cassette tape number is set to:
-A/B side
Tape sequence number
The observation record file can have no file name. 632
A1 Basic configuration requirements for recorders
A1.1 Keyboard
CH/T 2004—1999
Appendix A
Selection and maintenance of recording devices
(Supplement)
It should at least have "0～9·, ten, one, ×, one,,>,<, (,)\ (20) character keys, and it is better to have \A～Z" (26) English capital letter keys, or keys and combination keys that can complete corresponding functions. A1.2 Display screen
Must be a liquid crystal display screen.
A1.3 Memory
When the recorder power is turned off, the memory program and data must be able to be saved: the memory capacity can meet the basic requirements of measurement records. A1.4 External equipment
The recorder must be equipped with an interface for connecting a small printer and a small tape drive or disk drive, or equipped with an RS-232C interface. A1.5 Power supply
The various power supplies of the recorder and external devices are required to be applicable to both AC power supply and DC power supply, with low power consumption and convenient for field use.
A2 Function and performance requirements
A2.1 The recorder must have a programmable function and can input programs into the recorder through a keyboard, terminal device or other computer. It must also have certain program and data protection functions, or certain hardware and software protection measures can be taken. A2.2 The recording device can adapt to the field working environment, have stable performance, and have certain dustproof, moisture-proof, anti-interference and anti-vibration capabilities. A3 Maintenance measures
A3.1 At the beginning of the operation period, the hardware and software of the recording device must be fully checked, and it can only be used after the inspection is qualified. During the inspection, it can be checked automatically through the diagnostic program or manually. The inspection contents are as follows: the appearance of the recording device, the typing function of the recorder keyboard; the display screen and various display functions of the recorder; the memory, memory capacity and data storage function of the recorder; various functions, calculations, judgments, and transfer commands; the mechanical performance of the printer, various print format settings, print functions and print quality; the performance of the tape drive, the input and output of data files and programs; h. Others.
A3.2 The recording device must be kept with you and maintained in accordance with the requirements of the user manual. When the recorder is not in use, it should be placed in a well-sealed suitcase with a desiccant inside.
A3.3 The power supply system of the recording device should be checked regularly to prevent the wrong connection of the line and power supply. Pay attention to sufficient power and replace the battery in time to prevent battery leakage. The battery should be removed when not in use for a long time. A3.4 The recorder should be kept away from strong electromagnetic field sources, vibration sources, high temperature heat sources, and avoid direct sunlight. Appropriate protective measures should be taken in windy, dusty, and humid environments, such as sealing the recorder when observing and recording. A3.5 The magnetic head of the tape recorder should be cleaned and demagnetized regularly as required. Do not use chemical solvents to clean the housing of the recording device. 633
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A3.6 It is forbidden to touch the various interfaces and circuits of the recorder with your hands or other objects, and it is forbidden to squeeze, collide, drop, etc. the recording device, and it is forbidden to use the tape recorder for other purposes.
A3.7 When using an ordinary tape recorder as a tape recorder for the external device of the recorder, iron oxide tape must be selected. The tape is usually represented by symbols such as LN, LA, HF, LD, etc., and the tape is brown. A3.8 The tape for recording programs and data should be flat, without damage or deformation, with good surface finish, no marks or scratches, and neatly wound. There should be no noise, stalling or shaking during operation. The output signal is strong and the noise is small. A3.9 The tape should be kept away from contact with strong external magnetic and electric field sources. Keep it clean and avoid contamination by dust, water and oil. Do not touch the tape with your hands. After use, the tape should be promptly placed in a protective box and placed in a ventilated and dry place to prevent moisture and exposure. Appendix B
Code of Conduct for Recorders
(Supplement)
In order to ensure the normal operation of the recording device and obtain correct and reliable results, the recorder should strictly implement the provisions of this standard and relevant standards during field measurement operations.
B1 The recording device should be kept by the recorder. The maintenance of the recording device should be carried out in accordance with Appendix A. B2 The recording operation can only be completed by the recorder. Except for the inspection personnel, the recorder shall not allow non-recorders to use the recorder at will. B3 The recorder must operate in accordance with the operating procedures specified in the "Recording Operation Manual", and any illegal operations other than the operating procedures are not allowed. Input errors are not illegal operations, but should be avoided as much as possible. B4 When observing and recording, the recorder should be highly focused, insist on seeking truth from facts, and strictly abide by 3.1.2, 3.1.3 two provisions. B5 During field operations, it is generally not allowed to use the recorder and external equipment for other purposes. In particular, before the recording work is completed, it is prohibited to use the recorder for any other processing, input and output, etc. that may change the information in the recorder's memory. Appendix C
Graphic symbols for recording program flow charts
(Supplement)
For the relevant recording program flow charts and recording operation flow charts in the relevant measurement recording standards and recording program design submission materials, the flowchart graphic symbols and usage rules specified in GB1526-79 "Graphic symbols for information processing flow charts" should be followed. The flowchart of the FOR·NEXT statement used in the program using the BASIC language should be represented as follows: Entry
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Subject adjustment code
(Supplement)
The subject code is two digits: the high digit is the area code and the low digit is the bit number. D1
Design Institute
Research Institute
Research Institute
Headquarters
People's Liberation Army—
Committee
Metallurgy—
Aviation—
Electronics—
Non-metals
—Non-ferrous metals
South China—
North China—
Standardization
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Continued Table D1
Electromagnetic Waves
Topography and Trade
Scale
For the subject word codes of place names, the codes specified in GB2260-84 "Administrative Division Codes of the People's Republic of China" can be used. For the subject word code of the province (autonomous region, municipality directly under the central government), the first two digits of the prescribed code shall be used; for the subject word code of the region (city, prefecture, league), the first four digits of the prescribed code shall be used; for the subject word code of the county (district, banner, town), the prescribed six-digit code shall be used. For example:
Shaanxi Province;
Xi'an City or Xi'an City, Shaanxi Province.
Appendix E
Measurement basic information identifier and content code (supplement)
In the input and output information, it is generally required to use the prescribed identifier. Other symbols may be used for those that cannot be expressed by the recorder. The use of Chinese characters corresponding to the identifier is allowed. For the naming principles of the identifier, please refer to Appendix H (reference). E1 Title multiple
Content code and comments
Number of code characters
Identifier
Information name
Measurement code
Measurement content code
Measurement discipline code
The code is shown in Table E4
The last two digits of the year code,
Measurement year
Program design unit name code string.
Program design unit
Program designer name code string.
Program designer
Program name
Compilation year code
Applicable instrument
Code
Applicable level
Micro code
Applicable method code
Measurement code
Applicable method, level and instrument code are specified by the measurement standard name code string of each measurement field record standard.
Measurement standard
For standards without codes, they can be numbered as follows12
Standard code
Information name
Measurement unit
Measurement team code
Observer
Recorder
Measurement line name
Instrument model
Instrument number
Manufacturer
Additive constant
Basic constant||tt ||Recorder model
Recorder number
Tape drive model
Tape drive number
Instrument parameters
Year, month, day
Record number
Name of measurement section
Identifier
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Continued Table E1
Number of characters
Release form
Medium code
Measurement code!
Name code string of the measuring unit.
Content code and comments
Release year
Measurement team number of the measuring unit.
Observer name code string.
Recorder name code string.
Network attributes:
Network name code
0 Country, 1 Crustal deformation, 2 Engineering, 3 Topography, 4 City, 5 Other. Network category:
A Geodetic network, C Deformation network, P Plane network, H Elevation network, G Gravity network. T Triangulation network, L Leveling network, D Side measurement network, N Side angle network, B Baseline network, S Traverse network.
Network category code should use the lowest level code. Instrument manufacturer name code string.
The first character of the identifier:
R One line difference, P One circle value, D Diameter, G Grid value (division value), M Magnification. The third character of the identifier:
L Level, M Micrometer, C Dial, T Telescope, E Eyepiece Micrometer. The fourth character of the identifier:
P-main telescope, D-twisting telescope, L-horizontal, V-vertical, A-aiming part, T-Terget level, H-hang (cross) level, I-tilt screw, space-no limit.
XX XX XX
Number in the order of the recorded file group.
Survey level number
Survey observation method code, specified by the relevant survey standards. Survey section name code string or codeSpace - No limit.
XX XX XX
Number in the order of the recorded file groups.
Measurement level number
Measurement observation method code, as specified by the relevant measurement standards. Measurement section name code string or codeSpace - No limit.
XX XX XX
Number in the order of the recorded file groups.
Measurement level number
Measurement observation method code, as specified by the relevant measurement standards. Measurement section name code string or code
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