Standard number: QX/T 491-2019
Standard name: Specifications for ground-based ionospheric scintillation observation
English name: Specifications for ground-based ionospheric scintillation observation ||
tt||Standard format: PDF
Release time: 2019-09-18
Implementation time: 2019-12-01
Standard size: 1459K
Introduction to the standard: This standard was drafted in accordance with the rules given in GB/T1.1-2009
This standard was proposed and managed by the Space Weather Monitoring and Early Warning Technical Committee of the National Satellite Meteorology and Space Weather Standardization Technical Committee (SAC/TC347/SC3).
The drafting units of this standard: Guangdong Ecological Meteorological Center, China University of Geosciences (Wuhan), Guangzhou Meteorological Satellite Ground Station. The main drafters of this standard: Xu Jie, Zuo Xiaomin, Huang Jiang, Deng Yujiao, He Quanjun, Zhao Wenhua, Wang Jiechun This standard specifies the observation station, instrument and detection environment requirements, observation business requirements, and regular inspection and maintenance requirements
for ground-based ionospheric scintillation observations. This standard applies to ground-based ionospheric scintillation observation business
2 Normative references
The following documents are essential for the application of this document. For all referenced documents with dates, only the versions with dates apply to this document. For any undated referenced documents, the latest version (including all amendments) applies to this document
QX/T285-2015 Ionospheric scintillation index data format
3 Terms and definitions
The following terms and definitions apply to this document
Ionosphere
The area in the Earth's atmosphere with an altitude range of approximately 60km~1000km, where there are a large number of free electrons, which can significantly affect the propagation of radio waves
[GB/T31158-2014, Definition 2.1]
Ionospheric scintillationionesp heric scintillatio
The phenomenon that the amplitude or phase of radio waves fluctuates rapidly when passing through the ionosphere.
[QX/T285-2015, definition,
Ground-based ionospheric scintillation observation
The fluctuations in the amplitude and phase of radio wave signals radiated by satellite beacons or outer space radio stars that propagate through the ionosphere are received on the ground, and are used to study the uneven structure of ionospheric electron density and its distribution and movement.
This standard specifies the requirements for observation stations, instruments and detection environment, observation business requirements, and regular inspection and maintenance requirements for ground-based ionospheric scintillation observation. This standard applies to ground-based ionospheric scintillation observation business.

ICS07.060
Meteorological Industry Standard of the People's Republic of China
QX/T491—2019
Specifications for ground-based ionospheric scintillation observation Industry Standard Information Service Platform
Released on 2019-09-18
China Meteorological Administration
Implementation on 2019-12-01
Industry Standard Information Service Platform
Normative referenced documents
Terms and definitions
Requirements for observation stations, instruments and detection environment..5 Observation business requirements
6 Requirements for regular inspection and maintenance
Appendix A (Normative Appendix) Main technical performance requirements for ground-based ionospheric flash observation instruments Appendix B (Informative Appendix) Regular inspection and maintenance table References
QX/T491—2019
Industry Standard Information Service Platform
Industry Standard Information Service Platform
This standard was drafted in accordance with the rules given in GB/T1.1—2009. QX/T491-2019
This standard is proposed and managed by the Space Weather Monitoring and Early Warning Sub-Technical Committee of the National Satellite Meteorology and Space Weather Standardization Technical Committee (SAC/TC347/SC3).
Drafting units of this standard: Guangdong Ecological Meteorological Center, China University of Geosciences (Wuhan), Guangzhou Meteorological Satellite Ground Station Main drafters of this standard: Xu Jie, Zuo Xiaomin, Huang Jiang, Deng Yujiao, He Quanjun, Zhao Wenhua, Wang Jiechun Industry Standard Information Service Platform
Industry Standard Information Service Platform
1 Scope
Ground-based ionospheric scintillation observation specification
QX/T491—2019
This standard specifies the observation station, instrument and detection environment requirements, observation business requirements, regular inspection and maintenance requirements for ground-based ionospheric scintillation observation, etc.
This standard applies to ground-based ionospheric scintillation observation business. 2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. QX/T285—2015 Ionospheric scintillation index data format 3 Terms and definitions
The following terms and definitions apply to this document. 3.1
Ionosphere
The area in the Earth's atmosphere with an altitude range of about 60km1000km, where there are a large number of free electrons, which are sufficient to significantly affect the propagation of radio waves
[GB/T31158—2014, definition 2.1]
Ionospheric scintillationIonesuhericscintillation The phenomenon of rapid fluctuations in amplitude or phase when radio waves pass through the ionosphere. [QX/T285—2015, definition number 2]
ground-bssedu ic spneric scintillation observation Ground-based ionospheric scintillation observation
The fluctuations in the amplitude and phase of radio wave signals radiated by satellite beacons or outer space radio stars that propagate through the ionosphere are received on the ground. It is used to study the uneven structure of ionospheric electron density and its distribution. 4 Requirements for observation stations, instruments and detection environment
4.1 Identification and coordinates of observation stations
The station number of the ground-based ionospheric scintillation observation station shall be determined in accordance with the regulations of the World Meteorological Organization and the meteorological authority of the State Council. The station number is used for detection data transmission and archiving. The geographical longitude and latitude of the ground-based ionospheric scintillation observation station shall be determined by the base position of the signal receiving antenna, with the value accurate to 1', and the height of the antenna above sea level shall be determined by the base height of the signal receiving antenna, with the value accurate to 1m. 4.2 Observation Instruments The ground-based ionospheric scintillation observation instrument consists of five parts: antenna, ionospheric scintillation receiver, data processing and storage computer, ionospheric scintillation data 1
QX/T491—2019
processing software and uninterruptible voltage stabilized power supply. The antenna receives satellite beacons on the ground, transmits the fluctuations of the amplitude and phase of the radio wave signal to the data processing and storage computer through the ionospheric scintillation receiver, and uses the ionospheric scintillation data processing software to calculate and generate observation data. Its main technical performance requirements and installation connection diagram shall comply with the provisions of Table A.1 and Figure A.1 in Appendix A. 4.3 Detection environment requirements
The detection environment of ground-based ionospheric scintillation observation shall meet the following requirements a)
The ground of the antenna site should be kept flat, and there should be no shielding that affects the observation quality. The elevation angle of obstacles in all directions of the antenna should not exceed 15°, and plants should not come into contact with the antenna and feeder; b) The electromagnetic environment of the ionospheric scintillation observation instrument should be protected to ensure that the instrument's working band is not subject to electromagnetic interference. 5 Observation business requirements
5.1 Instrument calibration
Instrument calibration tests should be carried out regularly every year. Test content Mainly for the functional performance test of the ionospheric scintillation receiver, the specific calibration method is carried out according to the instrument operation manual of different satellite beacon types, and it is advisable to include the following contents: a) Auxiliary instruments: data recording computer, satellite signal simulator, satellite signal power divider, calibration standard instrument; b) Test scene: laboratory environment, calibration field environment; Test instrument comparison: the test instrument status should be checked in detail before and after calibration, and the calibration standard instrument should be used for the same test at the same time c)
self-calibration measurement, and the comparison with the measuring instrument is realized by inputting the same satellite signal value d) Test purpose: the technical performance of the ionospheric scintillation receiver meets the requirements and complies with the provisions of Table A.1. 5.2 Observation time system, day boundary and time boundary
Ground-based ionospheric scintillation observation adopts universal time (UTC) and continuous observation for 24 hours a day. The day boundary is 00:00-23:59 every day, and the time boundary is 00:00-59:59 every hour. 5.3 Observation mode
Ground-based ionospheric scintillation observation adopts automatic continuous observation mode, and the scintillation index data of the observation beacon is recorded every 1 minute for daily business observation.
5.4 Operation requirements
Refer to the operation manual provided by the manufacturer of the ionospheric scintillation instrument. The main contents should include: a) Instrument setting: By setting the relevant parameters in the ionospheric scintillation instrument, the instrument working information, including site information, detection content, observation method, etc.:
b) Start-up work: Turn on the power of the machine to make the instrument enter the pre-observation self-check program, and it will automatically enter the observation state without fault alarm: Obtain and transmit observation data: The instrument automatically obtains and stores observation data under normal working conditions, and automatically transmits relevant data according to predetermined requirements; under abnormal working conditions, manual intervention is required; d) Operation monitoring: During the automatic operation of the instrument, the staff should pay attention to regularly monitoring the equipment operation status, scintillation data integrity and data transmission, and regularly back up the software system. 5.5 Data storage and compilation
Data refers to the original data recorded by the ionospheric flash refining instrument and the related scintillation index data. Data storage and compilation shall meet the following requirements:
QX/T491-2019
Data storage and compilation shall comply with the provisions of QX/T285-2015 and be archived in the form of files. Compilation shall be carried out every year; a)
b) File compilation takes time series as the clue, and statistical data start and end time, type and number, etc.; the compiled data shall be manually checked and archived to the national meteorological archives department according to regulations. The observation station shall back up and store historical data for at least 1 year:
The national space weather business department shall compile typical case data such as disastrous space weather events, and shall regularly conduct spot checks on the content of files transmitted by the observation station.d)
6 Requirements for regular inspection and maintenance
Should be carried out in accordance with the following requirements:
a) Weekly regular inspections to check the instrument power supply, antenna appearance, network communication and the operation of the air conditioner at the observation station. Focus on checking the integrity of the ionospheric scintillation observation data;
Monthly maintenance to check the performance and storage space of the instrument acquisition and communication computers; c
Annual maintenance to focus on checking the working parameters of the ionospheric scintillation instrument according to the manufacturer's requirements, testing the grounding resistance of the lightning protection facilities and systems, and submitting the annual maintenance work report of the observation station to the relevant management department; Annual inspections are organized by the national space weather business department to conduct a comprehensive inspection of the instrument hardware and software, and perform instrument calibration and observations d)
Environmental inspection:
e) All regular inspections and maintenance situations should be recorded in the regular inspection record form of the ionospheric scintillation observation station and the maintenance and troubleshooting details list of the ionospheric scintillation observation instrument. The format is shown in Table B.1 to Table B.1 in Appendix B.3. Industry Standard Information Service Platform
QX/T491—2019
Appendix A
(Normative Appendix)
Main technical performance requirements for ground-based ionospheric scintillation observation instrumentsA.1Main technical performance requirements for ground-based ionospheric scintillation observation instrumentsTable A.1
Equipment type
Ionospheric scintillometer based on global
navigation satellite
system signal
Ionospheric scintillation based on geostationary
meteorological satellite
signal
Main technical performance requirements for ground-based ionospheric scintillation observation instrumentsBasic observation quantities
should at least include Beidou navigation satellite sys-tem.BDS) B1, B2 frequency bands, Global positioning system (GPS) system: GPS) L1, L2 frequency band, GLONASS
(Global navigation satellite sys-carrier phase
observation value,
pseudorange, carrier
noise ratio, time
performance requirements
number of receiving channels: not less than 96.
signal capture sensitivity: BDSBl: -167dBWBDSB2: -167dBW;GPSL1: -170dBW;GPS L2: -167 dBW;GLONASS L1:
-167dBW;GLONASSL2:-167dBW.
Signal tracking sensitivity:BDSBl:-178dBWBDSB2:178dBW;GPSL1:182dBW;
GPSL2:—176dBW;GLONASSL1:-176dBW;GLONASSL2:—176 dBW.
Carrier phase measurement accuracy: no more than 1% wavelength. Pseudorange measurement accuracy: no more than 0.3m.
S4 observation accuracy: better than 0.1.
64 observation accuracy: better than 0.05.
S4 index monitoring capability: no less than 0.7.
Absolute TEC measurement accuracy: 0.3TECU. Industry standard signal
tem.GLONASS) L1, L2 frequency band
Relative TEC measurement accuracy: 0.03TECU. Time synchronization accuracy: no more than 0.1us
Basic observation sampling rate: no less than 50Hz Observation output time interval: adjustable from 0.02s to 1min.
S4 and c4 output time interval: from 1s to 1min Can withstand no less than 2g.
Should be equipped with an antenna with suppression capability
S4 observation accuracy: better than 1.
FY-2 and FY-4 geostationary meteorological satellite business telemetry signals (operating frequencies:
1702.5MHz and 2290MHz)
Carrier phase
Observation value,
Signal power
64Observation accuracy: better than 0.05.
S4 index monitoring capability: not less than 0.7 Basic visual training quantity sampling rate: not less than 50Hz
Vibration resistance: not less than 2g*.
Should have network port, serial port and other communication interfaces. Observation items
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Equipment type
Electromagnetic scintillation based on polar-orbiting
meteorological satellite
signals
Ionospheric scintillation
Table A.1 Main technical performance requirements of ground-based ionospheric scintillation observation instruments (continued) Receiving signal
Earth Observation System (EOS)/National Oceanic and Atmospheric Administration (NOAA)/National Polar-orbiting
companion satellite (National Basic observation quantity Signal power Note: dBW is the unit for absolute power value, 1dBW=10X1gW*g is the acceleration of gravity. 1g～9.8m/s2 2 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument A.2 Performance requirements X-band system G/T: not less than 27dB/K. L-band system G/T: not less than 12dB/K. S4 observation accuracy: better than 0.1.
S4 index monitoring capability: not less than 0.7
QX/T491—2019
Observation items
Ionospheric amplitude
Tracking accuracy: better than 0.1 times the main lobe width of the receiving antenna beam.
Basic observation quantity sampling rate: not less than 50Hz Vibration resistance: not less than 2g.
Should have communication interfaces such as network port and serial port
Industry standard information service platform
Description:
Antenna·Place outdoors:
Antenna feeder, transmits satellite signals from outdoors to indoors: 2
Ionospheric scintillation receiver, place indoors; 3
Network cable or communication connection cable, laid indoors: 4
Data processing and storage computer, placed indoors; 6
Power connection cable. Lay indoors:
Municipal power supply and uninterruptible voltage-stabilized power supply, place indoors: Power connection cable, laid indoors.
Figure A.1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Automatic disease extraction
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection||tt| |Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
AbnormalbzxZ.net
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
AbnormalBDS) B1, B2 frequency bands, Global positioning system (GPS) L1, L2 frequency bands, GLONASS
(Global navigation satellite sys-carrier phase
observation value,
pseudorange, carrier
noise ratio, time
performance requirements
number of receiving channels: not less than 96.
signal capture sensitivity: BDSBl: -167dBWBDSB2: -167dBW;GPSL1: -170dBW;GPS L2: -167 dBW;GLONASS L1:
-167dBW;GLONASSL2:-167dBW.
Signal tracking sensitivity:BDSBl:-178dBWBDSB2:178dBW;GPSL1:182dBW;
GPSL2:—176dBW;GLONASSL1:-176dBW;GLONASSL2:—176 dBW.
Carrier phase measurement accuracy: no more than 1% wavelength. Pseudorange measurement accuracy: no more than 0.3m.
S4 observation accuracy: better than 0.1.
64 observation accuracy: better than 0.05.
S4 index monitoring capability: no less than 0.7.
Absolute TEC measurement accuracy: 0.3TECU. Industry standard signal
tem.GLONASS) L1, L2 frequency band
Relative TEC measurement accuracy: 0.03TECU. Time synchronization accuracy: no more than 0.1us
Basic observation sampling rate: no less than 50Hz Observation output time interval: adjustable from 0.02s to 1min.
S4 and c4 output time interval: from 1s to 1min Can withstand no less than 2g.
Should be equipped with an antenna with suppression capability
S4 observation accuracy: better than 1.
FY-2 and FY-4 geostationary meteorological satellite business telemetry signals (operating frequencies:
1702.5MHz and 2290MHz)
Carrier phase
Observation value,
Signal power
64Observation accuracy: better than 0.05.
S4 index monitoring capability: not less than 0.7 Basic visual training quantity sampling rate: not less than 50Hz
Vibration resistance: not less than 2g*.
Should have network port, serial port and other communication interfaces. Observation items
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Equipment type
Electromagnetic scintillation based on polar-orbiting
meteorological satellite
signals
Ionospheric scintillation
Table A.1 Main technical performance requirements of ground-based ionospheric scintillation observation instruments (continued) Receiving signals
Earth Observation System (EOS)/National Oceanic and Atmospheric Administration (NOAA)/National Polar-orbiting
companion satellite (National Basic observation quantity Signal power Note: dBW is the unit for absolute power value, 1dBW=10X1gW*g is the acceleration of gravity. 1g～9.8m/s2 2 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument A.2 Performance requirements X-band system G/T: not less than 27dB/K. L-band system G/T: not less than 12dB/K. S4 observation accuracy: better than 0.1.
S4 index monitoring capability: not less than 0.7
QX/T491—2019
Observation items
Ionospheric amplitude
Tracking accuracy: better than 0.1 times the main lobe width of the receiving antenna beam.
Basic observation quantity sampling rate: not less than 50Hz Vibration resistance: not less than 2g.
Should have communication interfaces such as network port and serial port
Industry standard information service platform
Description:
Antenna·Place outdoors:
Antenna feeder, transmits satellite signals from outdoors to indoors: 2
Ionospheric scintillation receiver, place indoors; 3
Network cable or communication connection cable, laid indoors: 4
Data processing and storage computer, placed indoors; 6
Power connection cable. Lay indoors:
Municipal power supply and uninterruptible voltage-stabilized power supply, place indoors: Power connection cable, laid indoors.
Figure A.1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Disease extraction automatic
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection||tt| |Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
Abnormal
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
AbnormalBDS) B1, B2 frequency bands, Global positioning system (GPS) L1, L2 frequency bands, GLONASS
(Global navigation satellite sys-carrier phase
observation value,
pseudorange, carrier
noise ratio, time
performance requirements
number of receiving channels: not less than 96.
signal capture sensitivity: BDSBl: -167dBWBDSB2: -167dBW;GPSL1: -170dBW;GPS L2: -167 dBW;GLONASS L1:
-167dBW;GLONASSL2:-167dBW.
Signal tracking sensitivity:BDSBl:-178dBWBDSB2:178dBW;GPSL1:182dBW;
GPSL2:—176dBW;GLONASSL1:-176dBW;GLONASSL2:—176 dBW.
Carrier phase measurement accuracy: no more than 1% wavelength. Pseudorange measurement accuracy: no more than 0.3m.
S4 observation accuracy: better than 0.1.
64 observation accuracy: better than 0.05.
S4 index monitoring capability: no less than 0.7.
Absolute TEC measurement accuracy: 0.3TECU. Industry standard signal
tem.GLONASS) L1, L2 frequency band
Relative TEC measurement accuracy: 0.03TECU. Time synchronization accuracy: no more than 0.1us
Basic observation sampling rate: no less than 50Hz Observation output time interval: adjustable from 0.02s to 1min.
S4 and c4 output time interval: from 1s to 1min Can withstand no less than 2g.
Should be equipped with an antenna with suppression capability
S4 observation accuracy: better than 1.
FY-2 and FY-4 geostationary meteorological satellite business telemetry signals (operating frequencies:
1702.5MHz and 2290MHz)
Carrier phase
Observation value,
Signal power
64Observation accuracy: better than 0.05.
S4 index monitoring capability: not less than 0.7 Basic visual training quantity sampling rate: not less than 50Hz
Vibration resistance: not less than 2g*.
Should have network port, serial port and other communication interfaces. Observation items
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Equipment type
Electromagnetic scintillation based on polar-orbiting
meteorological satellite
signals
Ionospheric scintillation
Table A.1 Main technical performance requirements of ground-based ionospheric scintillation observation instruments (continued) Receiving signal
Earth Observation System (EOS)/National Oceanic and Atmospheric Administration (NOAA)/National Polar-orbiting
companion satellite (National Basic observation quantity Signal power Note: dBW is the unit for absolute power value, 1dBW=10X1gW*g is the acceleration of gravity. 1g～9.8m/s2 2 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument A.2 Performance requirements X-band system G/T: not less than 27dB/K. L-band system G/T: not less than 12dB/K. S4 observation accuracy: better than 0.1.
S4 index monitoring capability: not less than 0.7
QX/T491—2019
Observation items
Ionospheric amplitude
Tracking accuracy: better than 0.1 times the main lobe width of the receiving antenna beam.
Basic observation quantity sampling rate: not less than 50Hz Vibration resistance: not less than 2g.
Should have communication interfaces such as network port and serial port
Industry standard information service platform
Description:
Antenna·Place outdoors:
Antenna feeder, transmits satellite signals from outdoors to indoors: 2
Ionospheric scintillation receiver, place indoors; 3
Network cable or communication connection cable, laid indoors: 4
Data processing and storage computer, placed indoors; 6
Power connection cable. Lay indoors:
Municipal power supply and uninterruptible voltage-stabilized power supply, place indoors: Power connection cable, laid indoors.
Figure A.1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Disease extraction automatic
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection||tt| |Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
Abnormal
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Fengyun-2 and Fengyun-4 geostationary meteorological satellite business telemetry signals (operating frequencies:
1702.5MHz and 2290MHz)
Carrier phase
Observation value,
Signal power
64Observation accuracy: better than 0.05.
S4 index monitoring capability: not less than 0.7 Basic visual training quantity sampling rate: not less than 50Hz
Vibration resistance: not less than 2g*.
Should have network port, serial port and other communication interfaces. Observation items
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Equipment type
Electromagnetic scintillation based on polar-orbiting
meteorological satellite
signals
Ionospheric scintillation
Table A.1 Main technical performance requirements of ground-based ionospheric scintillation observation instruments (continued) Receiving signal
Earth Observation System (EOS)/National Oceanic and Atmospheric Administration (NOAA)/National Polar-orbiting
companion satellite (National Basic observation quantity Signal power Note: dBW is the unit for absolute power value, 1dBW=10X1gW*g is the acceleration of gravity. 1g～9.8m/s2 2 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument A.2 Performance requirements X-band system G/T: not less than 27dB/K. L-band system G/T: not less than 12dB/K. S4 observation accuracy: better than 0.1.
S4 index monitoring capability: not less than 0.7
QX/T491—2019
Observation items
Ionospheric amplitude
Tracking accuracy: better than 0.1 times the main lobe width of the receiving antenna beam.
Basic observation quantity sampling rate: not less than 50Hz Vibration resistance: not less than 2g.
Should have communication interfaces such as network port and serial port
Industry standard information service platform
Description:
Antenna·Place outdoors:
Antenna feeder, transmits satellite signals from outdoors to indoors: 2
Ionospheric scintillation receiver, place indoors; 3
Network cable or communication connection cable, laid indoors: 4
Data processing and storage computer, placed indoors; 6
Power connection cable. Lay indoors:
Municipal power supply and uninterruptible voltage-stabilized power supply, place indoors: Power connection cable, laid indoors.
Figure A.1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Disease extraction automatic
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection||tt| |Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
Abnormal
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Fengyun-2 and Fengyun-4 geostationary meteorological satellite business telemetry signals (operating frequencies:
1702.5MHz and 2290MHz)
Carrier phase
Observation value,
Signal power
64Observation accuracy: better than 0.05.
S4 index monitoring capability: not less than 0.7 Basic visual training quantity sampling rate: not less than 50Hz
Vibration resistance: not less than 2g*.
Should have network port, serial port and other communication interfaces. Observation items
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Ionospheric amplitude
degrees
scintillation index
number and phase
scintillation index
Equipment type
Electromagnetic scintillation based on polar-orbiting
meteorological satellite
signals
Ionospheric scintillation
Table A.1 Main technical performance requirements of ground-based ionospheric scintillation observation instruments (continued) Receiving signal
Earth Observation System (EOS)/National Oceanic and Atmospheric Administration (NOAA)/National Polar-orbiting
companion satellite (National Basic observation quantity Signal power Note: dBW is the unit for absolute power value, 1dBW=10X1gW*g is the acceleration of gravity. 1g～9.8m/s2 2 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument A.2 Performance requirements X-band system G/T: not less than 27dB/K. L-band system G/T: not less than 12dB/K. S4 observation accuracy: better than 0.1.
S4 index monitoring capability: not less than 0.7
QX/T491—2019
Observation items
Ionospheric amplitude
Tracking accuracy: better than 0.1 times the main lobe width of the receiving antenna beam.
Basic observation quantity sampling rate: not less than 50Hz Vibration resistance: not less than 2g.
Should have communication interfaces such as network port and serial port
Industry standard information service platform
Description:
Antenna·Place outdoors:
Antenna feeder, transmits satellite signals from outdoors to indoors: 2
Ionospheric scintillation receiver, place indoors; 3
Network cable or communication connection cable, laid indoors: 4
Data processing and storage computer, placed indoors; 6
Power connection cable. Lay indoors:
Municipal power supply and uninterruptible voltage-stabilized power supply, place indoors: Power connection cable, laid indoors.
Figure A.1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Disease extraction automatic
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection||tt| |Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
Abnormal
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Disease extraction automatic
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection
Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
Abnormal
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal1 Schematic diagram of installation and connection of ground-based ionospheric scintillation observation instrument Degree scintillation index
QX/T491—2019
Regular inspection record table
Appendix B
(Informative Appendix)
Regular inspection and maintenance table
Regular inspection record table of ionospheric scintillation observation station Ionospheric scintillation observation station area station number
Inspector:
Maintenance content
Operating system
Disease extraction automatic
Inspection status
Application software
Storage space
Computer time synchronization
(Beijing Standard Time)
Observation data
Integrity
Network connection
Data communication
Mains power inspection
Regulated power supply
Antenna appearance inspection
Check the working status through the flash instrument indicator
Check the working status through the application software
Virus-free
Maintenance results
Abnormal
Virus
Abnormal
Not satisfied
No more than 10 seconds
More than 10 seconds
Abnormal
Abnormal
Abnormal
Abnormal
Year, month, day
Fault situation remarks
Service platform
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
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