CN212410861U - Ground proximity warning system based on satellite positioning ground-based augmentation - Google Patents
Ground proximity warning system based on satellite positioning ground-based augmentation Download PDFInfo
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Abstract
The utility model relates to a land-near warning system based on satellite positioning land-based reinforcement, which comprises a GBAS differential positioner, a land-near warning computer and an alarm; the ground proximity warning computer is in communication with the GBAS differential locator and the alarm, respectively, and the GBAS differential locator is in communication with a satellite. The utility model discloses constitute a novel enhancement mode ground warning system, based on satellite positioning land based reinforcing technique, effectively improved satellite calculation's longitude and latitude information, improved aircraft navigation data's reliability greatly to greatly increased ground warning system report an emergency and ask for help or increased vigilance precision and reliability, effectively improved the security of aircraft.
Description
Technical Field
The utility model relates to an aviation safety technical field, in particular to ground proximity warning system based on satellite positioning land-based reinforcing.
Background
With the rapid development of the aviation industry, the density of air traffic is higher and higher, and the aviation safety problem is increasingly highlighted. The ground proximity warning system is an important component for ensuring aviation safety, and mainly has the functions of predicting potential conflict of the airplane on a flight track, and giving a warning to a unit before the airplane enters a dangerous area or when the airplane is about to collide with the ground, so that the airplane is prevented from entering the dangerous area or colliding with the ground, and the safety of the airplane is improved.
The ground proximity warning system mostly relies on a GPS positioning technology to acquire navigation data of an aircraft, however, the current ground proximity warning system is insufficient in positioning accuracy of the aircraft, so that the acquired navigation data of the aircraft is low in reliability, and therefore the warning accuracy and reliability are low, and the safety of the aircraft cannot be effectively improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low technical problem of reliability of the navigation data of the aircraft that positioning accuracy is not enough, acquires based on satellite positioning land based reinforcing near ground warning system among the prior art has been solved.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a ground proximity warning system based on satellite positioning ground-based augmentation comprises a GBAS differential locator, a ground proximity warning computer and an alarm;
the ground proximity warning computer is in communication with the GBAS differential locator and the alarm, respectively, and the GBAS differential locator is in communication with a satellite.
The utility model has the advantages that: a GBAS (Ground-based Augmentation Systems) differential positioner is a positioner based on satellite positioning Ground-based Augmentation technology, and based on GPS signals, a carrier phase smoothing pseudorange differential correction principle is used to obtain true pseudoranges of satellites, and then differential correction is performed on navigation data of an aircraft to obtain high-precision navigation data, such as data of the current longitude and latitude data of the aircraft; the ground proximity warning computer predicts whether the aircraft collides with the terrain according to the high-precision navigation data, such as whether the aircraft is about to enter a dangerous area or whether the aircraft is about to collide with the ground, and triggers an alarm to generate an alarm signal when the aircraft collides with the terrain or has a terrain threat;
the utility model discloses a warning system near ground has constituted a neotype enhancement mode warning system near ground (EGPWS for short), based on satellite positioning land based reinforcing technique, has effectively improved satellite calculation's longitude and latitude information, has improved aircraft navigation data's reliability greatly to greatly increased warning system near ground's the precision and the reliability of reporting an emergency and asking for help or increased vigilance, effectively improved the security of aircraft.
On the basis of the technical scheme, the utility model discloses there is following improvement in addition:
further: the GBAS differential locator comprises a GBAS ground station and an onboard station;
the GBAS ground station is in communication with the onboard station and the satellite, respectively, and the onboard station is in communication with the ground proximity warning computer.
The beneficial effects of the further technical scheme are as follows: the GBAS ground station acquires satellite signals and performs differential correction to obtain corrected high-precision navigation data, and then the corrected high-precision navigation data is sent to the near-ground warning computer through the airborne station.
Further: the GBAS ground station comprises ground data processing equipment, very high frequency data broadcasting equipment, very high frequency data antennas, at least three reference receivers and receiver antennas with the same number as the reference receivers;
each receiver antenna is respectively in communication connection with the satellite, all the receiver antennas are in one-to-one corresponding communication connection with all the reference receivers, the ground data processing equipment is respectively in communication connection with each reference receiver, the very high frequency data broadcasting equipment is respectively in communication connection with the ground data processing equipment and the very high frequency data antenna, and the very high frequency data antenna is in communication connection with the airborne station.
The beneficial effects of the further technical scheme are as follows: the method comprises the steps that real measurement values of a plurality of groups of satellite signals are obtained through at least three reference receivers and receiver antennas with the same number as the reference receivers, differential correction values or pseudo-range measurement values of the corresponding plurality of groups of satellite signals are obtained through ground data processing equipment according to the real measurement values, then the real measurement values and the differential correction values are decoded through very high frequency data broadcasting equipment and very high frequency data antennas and sent to an onboard station, and high-precision navigation data of an airplane are obtained; the layout of at least three reference receivers and corresponding receiver antennas can improve the redundancy of fault detection and fault elimination of the reference receivers and can also reduce the low-frequency code multipath effect of the reference receivers; the gain mode in the direction of the ground plane can be reduced through the very high frequency data broadcasting equipment and the very high frequency data antenna, and the multipath effect of the low frequency code is further reduced to the maximum extent;
the GBAS ground station with the structure can accurately and perfectly receive, track and decode the GPS satellite space signals, measure the pseudo-range measurement from each reference receiver to each visible GPS satellite and the Doppler observed value, and output satellite information (pseudo-range measurement data, ephemeris data, almanac data and the like) and satellite state data with time marks, thereby greatly improving the reliability of the navigation data of the airplane.
Further: the number of the reference receivers is 3 or 4, and all the reference receivers are in a dual redundancy structure.
The beneficial effects of the further technical scheme are as follows: through 3 or 4 reference receivers, a layout form of a dual redundancy structure is convenient to form, the redundancy of fault detection and fault elimination of the reference receivers is convenient to improve, and the low-frequency code multipath effect of the reference receivers is convenient to reduce.
Further: the number of the receiver antennas is 3 or 4, and all the receiver antennas form a regular polygon structure.
The beneficial effects of the further technical scheme are as follows: when the number of the receiver antennas is 3, all the receiver antennas form a regular triangle structure, when the number of the receiver antennas is 4, all the receiver antennas form a regular quadrilateral structure, the arrangement form of the regular polygon is convenient for forming geometric constraint during signal processing by using a base line formed by straight lines of the receiver antennas, the resolving precision and speed are improved, and the precision and speed of airplane positioning are further improved.
Further: the GBAS ground station also comprises a low noise amplifier and an antenna feeder arrester corresponding to each receiver antenna;
each low noise amplifier is respectively in communication connection with the corresponding receiver antenna and the reference receiver, and each antenna feeder arrester is respectively in communication connection with the corresponding receiver antenna and the reference receiver.
The beneficial effects of the further technical scheme are as follows: the gain of the antenna of the receiver is generally lower, and the gain of the real measured value of each group of satellite signals can be improved through the low-noise amplifier; the antenna feeder line lightning arrester can protect and shield the corresponding receiver antenna, and reduce the radiation interference of multi-path antennas; the low-noise amplifier and the antenna feeder line arrester are used for further facilitating the subsequent acquisition of more accurate pseudo-range measurement values, namely the accuracy of airplane positioning is further improved.
Further: the very high frequency data broadcasting apparatus includes two VHF transmitters and two VDB receivers;
the two VDB receivers are in one-to-one corresponding communication connection with the two VHF transmitters, the two VDB receivers are in communication connection with the ground data processing equipment respectively, and the two VHF transmitters are in communication connection with the very high frequency data antenna respectively.
The beneficial effects of the further technical scheme are as follows: by using two sets of a VHF (Very High Frequency, i.e., VHF in the Frequency band range of 30Mhz to 300Mhz) transmitter and a VDB (VHF Data Broadcasting) receiver, a VHF Data Broadcasting apparatus in a redundant layout form can be formed, which can effectively reduce the gain pattern in the direction of the ground plane, further minimize the multipath effect, and make the VHF Data antenna located in all the near-line-of-sight ranges.
Further: the ground proximity warning computer is internally provided with a data memory and a processor;
the processor is respectively in communication connection with the data storage, the GBAS differential locator and the alarm.
The beneficial effects of the further technical scheme are as follows: a large amount of reference data for analyzing whether the aircraft has terrain threats, such as airport data, terrain data and the like, can be stored through the data memory, so that subsequent alarm analysis is facilitated; the warning analysis is conveniently carried out according to the reference data provided by the built-in terrain warning algorithm data memory and the navigation data of the airplane transmitted by the GBAS differential locator through the processor, and the near-earth warning with high reliability is realized; wherein, the built-in topography warning algorithm of treater is the algorithm among the prior art, does not the utility model provides an improvement point, and concrete detail here is no longer repeated.
Further: the data storage stores global airport data and global terrain data.
The beneficial effects of the further technical scheme are as follows: the global airport data refers to airport data with the length of 3500m and more than 3500m of all paved runways in the global range, and the global terrain data refers to land data of 95% of the world; through the global airport data and the global terrain data, the processor can predict the flight track of the airplane conveniently, and further judge whether the current longitude and latitude of the airplane conflicts with the terrain, whether the airplane is about to enter a dangerous area or collide with the ground, so that the safety of the airplane is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a land-based enhanced ground proximity warning system based on satellite positioning according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another satellite positioning-based land-based enhanced ground proximity warning system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a VDB antenna according to an embodiment of the present invention;
fig. 4 is a schematic layout diagram of a reference receiver according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. GBAS differential locator, 2, ground proximity warning computer, 3, alarm, 11, GBAS ground station, 12, onboard station, 111, reference receiver, 112, receiver antenna, 113, ground data processing device, 114, very high frequency data broadcasting device, 115, very high frequency data antenna, 116, low noise amplifier, 117, antenna feeder arrester, 21, data storage, 22, processor.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The present invention will be described with reference to the accompanying drawings.
Embodiment, as shown in fig. 1, a ground proximity warning system based on satellite positioning ground-based augmentation comprises a GBAS differential locator 1, a ground proximity warning computer 2 and an alarm 3;
the ground proximity warning computer 2 is in communication with the GBAS differential locator 1 and the alarm 3, respectively, and the GBAS differential locator 1 is in communication with a satellite.
The working principle of the ground proximity warning system of the embodiment is as follows:
a GBAS (Ground-based Augmentation Systems) differential positioner is a positioner based on satellite positioning Ground-based Augmentation technology, and based on GPS signals, a carrier phase smoothing pseudorange differential correction principle is used to obtain true pseudoranges of satellites, and then differential correction is performed on navigation data of an aircraft to obtain high-precision navigation data, such as data of the current longitude and latitude data of the aircraft; the ground proximity warning computer predicts whether the airplane collides with the terrain, such as whether the airplane is about to enter a dangerous area or whether the airplane is about to collide with the ground or not according to the high-precision navigation data, and triggers an alarm to generate an alarm signal when the airplane collides with the terrain or has a terrain threat.
The utility model discloses a warning system near ground has constituted a neotype enhancement mode warning system near ground (EGPWS for short), based on satellite positioning land based reinforcing technique, has effectively improved satellite calculation's longitude and latitude information, has improved aircraft navigation data's reliability greatly to greatly increased warning system near ground's the precision and the reliability of reporting an emergency and asking for help or increased vigilance, effectively improved the security of aircraft.
Preferably, as shown in fig. 2, the GBAS differential locator 1 comprises a GBAS ground station 11 and an onboard station 12;
the GBAS ground station 11 is communicatively coupled to the on-board station 12 and the satellite, respectively, and the on-board station 12 is communicatively coupled to the ground proximity warning computer 2.
The GBAS ground station acquires satellite signals and performs differential correction to obtain corrected high-precision navigation data, and then the corrected high-precision navigation data is sent to the near-ground warning computer through the airborne station.
Preferably, as shown in fig. 2, the GBAS ground station 11 includes a ground data processing device 113, a very high frequency data broadcasting device 114, a very high frequency data antenna 115, and at least three reference receivers 111 and the same number of receiver antennas 112 as the reference receivers 111;
each receiver antenna 112 is respectively in communication connection with the satellite, all the receiver antennas 112 are in one-to-one communication connection with all the reference receivers 111, the ground data processing device 113 is respectively in communication connection with each reference receiver 111, the very high frequency data broadcasting device 114 is respectively in communication connection with the ground data processing device 113 and the very high frequency data antenna 115, and the very high frequency data antenna 115 is in communication connection with the airborne station 12.
The method comprises the steps that real measurement values of a plurality of groups of satellite signals are obtained through at least three reference receivers and receiver antennas with the same number as the reference receivers, differential correction values or pseudo-range measurement values of the corresponding plurality of groups of satellite signals are obtained through ground data processing equipment according to the real measurement values, then the real measurement values and the differential correction values are decoded through very high frequency data broadcasting equipment and very high frequency data antennas and sent to an onboard station, and high-precision navigation data of an airplane are obtained; the layout of at least three reference receivers and corresponding receiver antennas can improve the redundancy of fault detection and fault elimination of the reference receivers and can also reduce the low-frequency code multipath effect of the reference receivers; the gain mode in the direction of the ground plane can be reduced through the very high frequency data broadcasting equipment and the very high frequency data antenna, and the multipath effect of the low frequency code is further reduced to the maximum extent;
the GBAS ground station with the structure can accurately and perfectly receive, track and decode the GPS satellite space signals, measure the pseudo-range measurement from each reference receiver to each visible GPS satellite and the Doppler observed value, and output satellite information (pseudo-range measurement data, ephemeris data, almanac data and the like) and satellite state data with time marks, thereby greatly improving the reliability of the navigation data of the airplane.
Specifically, the differential principle of the GBAS differential positioner in this embodiment is as follows:
1. measuring and solving a GPS signal navigation message through a reference receiver and a receiver antenna to obtain a position parameter of a satellite;
2. calculating the distance between the satellite and the reference receiver based on the known position of the reference receiver;
3. calculating a pseudo-range measurement value from the reference receiver to the satellite based on the distance between the satellite and the reference receiver;
4. smoothing the pseudo-range measurement value and the signal carrier phase through a filter to obtain a smoothed pseudo-range;
5. and estimating the clock error to obtain a clock deviation estimation, and obtaining a true pseudo range according to the smoothed pseudo range and the clock deviation estimation.
It should be noted that, the calculation formula used in each step is the prior art, and the utility model discloses do not relate to the improvement of calculation formula or computer program, specific details are not repeated here.
Specifically, the GBAS ground station in this embodiment needs to pay attention to the following matters in the installation and layout process:
1. avoiding the use of fields with local bowl (concave) topographical features;
2. concave ground may amplify ground reflection coefficients, and concave ground may also accumulate rain at the bottom of the antenna (including the receiver antenna and the vhf data antenna);
3. the position at the apex of the convex surface is the ideal position;
4. the antenna (including the receiver antenna and the vhf data antenna) should be installed stably;
5. analyzing the local site (4m radius) to minimize the local ground or pool-near area of moisture saturation near the base of the antenna (including the receiver antenna and the vhf data antenna);
6. a layer of crushed stone (or other suitable material) is added to provide a stable electrically rough surface, resulting in a reflection coefficient in the range of-6 dB to-9 dB.
Specifically, the vhf data antenna in this embodiment is a VDB antenna, which can be selected according to actual situations, the intensity of the VDB signal needs to be covered and met in approaching airspace, airport runways and airspace, the signal shielding problem of terrain and buildings needs to be noticed during the installation of the VDB antenna, the structure of a typical VDB antenna selected in this embodiment is shown in fig. 3, and the detailed parameters are shown in table 1.
Table 1 parameters of a typical VDB antenna of this embodiment
Preferably, the number of the reference receivers 111 is 3 or 4, and all the reference receivers 111 are in a dual redundancy structure.
Through 3 or 4 reference receivers (RR for short), a layout form of a dual redundancy structure is conveniently formed, the redundancy of fault detection and fault removal of the reference receivers is conveniently improved, and the low-frequency code multipath effect of the reference receivers is conveniently reduced.
Specifically, the reference receivers in this embodiment are 4 receivers, the geometric layout of which is shown in fig. 4, and each reference receiver is also equipped with a chassis to protect the reference receiver to a certain extent, and a power supply and a lightning protection circuit are also arranged inside each chassis.
Preferably, the number of the receiver antennas 112 is 3 or 4, and all the receiver antennas 112 form a regular polygon structure.
When the number of the receiver antennas (RRA for short) is 3, all the receiver antennas form a regular triangle structure, and when the number of the receiver antennas is 4, all the receiver antennas form a regular quadrilateral structure, the arrangement form of the regular polygon is convenient for forming geometric constraint during signal processing by using a base line formed by straight lines of the receiver antennas, the resolving precision and speed are improved, and the precision and speed of airplane positioning are further improved.
Specifically, the number of the receiver antennas in this embodiment is 4, the receiver antennas are active antennas, each receiver antenna has an approximately hemispherical directional pattern in the upper half plane, the lobe width is required to be greater than 120 °, the cutoff rate near the horizontal plane is required to be greater than 1 dB/degree (from an elevation angle of-5 ° to 5 °), and since the reference receiver is generally required to be able to receive satellite signals in all the antennas with an elevation angle of 5 ° or more, the layout of the receiver antennas can enable the antennas to have uniform response to the satellite signals in this space, and can suppress severe multipath effects and tropospheric delay.
The receiver antenna in the embodiment adopts right-hand circular polarization (RHCP), eliminates the faraday rotation effect of the ionosphere on the signal from the angle of the signal, and inhibits a part of left-hand circular polarized waves generated by ground or building reflection from the multipath propagation angle generated by signal reflection.
Preferably, as shown in fig. 2, the GBAS ground station 11 further includes a low noise amplifier 116 and an antenna feeder arrester 117 corresponding to each of the receiver antennas;
each of the low noise amplifiers 116 is communicatively coupled to a corresponding one of the receiver antennas 112 and the reference receiver 111, and each of the antenna feeder arresters 117 is communicatively coupled to a corresponding one of the receiver antennas 112 and the reference receiver 111.
The gain of the antenna of the receiver is generally lower, and the gain of the real measured value of each group of satellite signals can be improved through the low-noise amplifier; the antenna feeder line lightning arrester can protect and shield the corresponding receiver antenna, and reduce the radiation interference of multi-path antennas; the low-noise amplifier and the antenna feeder line arrester are used for further facilitating the subsequent acquisition of more accurate pseudo-range measurement values, namely the accuracy of airplane positioning is further improved.
Preferably, the very high frequency data broadcasting equipment 114 includes two VHF transmitters and two VDB receivers;
the two VDB receivers are in one-to-one corresponding communication connection with the two VHF transmitters, the two VDB receivers are in communication connection with the ground data processing device 113, and the two VHF transmitters are in communication connection with the VHF data antenna 115.
By using two sets of VHF (Very High Frequency) transmitter and VDB (Very High Frequency Data Broadcasting) receiver, a VHF Data Broadcasting device in a redundant layout can be formed, which can effectively reduce the gain mode in the direction of the ground plane, further reduce the multipath effect to the maximum extent, and make the VHF Data antenna located in all near-line-of-sight ranges.
Specifically, the VHF data broadcasting apparatus constituted by two VHF transmitters and two VDB receivers in this embodiment is installed in a standard 5.8 m-wide rack.
Preferably, as shown in fig. 2, the ground proximity warning computer 2 is built-in with a data storage 21 and a processor 22;
the processor 22 is communicatively connected to the data storage 21, the GBAS differential locator 1 and the alarm 3, respectively.
A large amount of reference data for analyzing whether the aircraft has terrain threats, such as airport data, terrain data and the like, can be stored through the data memory, so that subsequent alarm analysis is facilitated; the warning analysis is conveniently carried out according to the reference data provided by the built-in terrain warning algorithm data memory and the navigation data of the airplane transmitted by the GBAS differential locator through the processor, and the near-earth warning with high reliability is realized; wherein, the built-in topography warning algorithm of treater is the algorithm among the prior art, does not the utility model provides an improvement point, and concrete detail here is no longer repeated.
Specifically, a track adjustment algorithm may be further built in the processor in this embodiment, and the actual flight track of the aircraft may be adjusted according to the predicted flight track of the aircraft, so that the actual flight track of the aircraft is consistent with a preset track, and meanwhile, a terrain conflict event of the aircraft is avoided. Wherein, built-in orbit adjustment algorithm also is the algorithm among the prior art, does not the utility model provides an improvement point, and specific details are no longer repeated here.
Preferably, the data storage 21 stores global airport data and global terrain data.
The global airport data refers to airport data with the length of 3500m and more than 3500m of all paved runways in the global range, and the global terrain data refers to land data of 95% of the world; through the global airport data and the global terrain data, the processor can predict the flight track of the airplane conveniently, and further judge whether the current longitude and latitude of the airplane conflicts with the terrain, whether the airplane is about to enter a dangerous area or collide with the ground, so that the safety of the airplane is effectively improved.
Specifically, in the present embodiment, a global airport database is established in the data storage according to the global airport data, and a global terrain database is established according to the global terrain data.
Preferably, the system further comprises an inertial reference device and an atmospheric data transmission device, wherein the inertial reference device and the atmospheric data transmission device are respectively connected with the processor in a communication mode.
The inertial reference device is used for providing data such as ground speed, flight path and the like of the airplane for the processor, the atmospheric data transmission device is used for providing data such as air pressure altitude and the like of the airplane for the processor based on the atmospheric data system, the navigation data of the airplane is obtained through the GBAS differential locator, and the prediction precision of the flight path of the airplane can be further improved by combining the data such as the ground speed, the flight path and the air pressure altitude of the airplane.
It should be noted that, in this embodiment, the ground data processing device, the very high frequency data broadcasting device, the VDB antenna, the reference receiver, the receiver antenna, the low noise amplifier, the antenna feeder arrester, the ground proximity warning computer, and the alarm may all be selected according to actual situations, and specific details are not described here again.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A land-based augmentation ground warning system based on satellite positioning is characterized by comprising a GBAS differential locator (1), a ground warning computer (2) and an alarm (3);
the ground proximity warning computer (2) is respectively connected with the GBAS differential locator (1) and the alarm (3) in a communication mode, and the GBAS differential locator (1) is connected with a satellite in a communication mode.
2. The satellite positioning land-based augmented-by-ground-based warning system of claim 1, wherein the GBAS differential locator (1) comprises a GBAS ground station (11) and an onboard station (12);
the GBAS ground station (11) is communicatively coupled to the onboard station (12) and the satellite, respectively, and the onboard station (12) is communicatively coupled to the ground proximity warning computer (2).
3. The satellite positioning land-based augmentation near-earth warning system of claim 2, characterized in that the GBAS ground station (11) comprises a ground data processing device (113), a very high frequency data broadcasting device (114), a very high frequency data antenna (115) and at least three reference receivers (111) and the same number of receiver antennas (112) as the reference receivers (111);
each receiver antenna (112) is in communication connection with the satellite, all the receiver antennas (112) are in one-to-one communication connection with all the reference receivers (111), the ground data processing equipment (113) is in communication connection with each reference receiver (111), the very high frequency data broadcasting equipment (114) is in communication connection with the ground data processing equipment (113) and the very high frequency data antenna (115), and the very high frequency data antenna (115) is in communication connection with the airborne station (12).
4. The satellite positioning land-based augmentation near-earth warning system according to claim 3, characterized in that the number of the reference receivers (111) is 3 or 4, and all the reference receivers (111) are in a dual redundant structure.
5. The satellite positioning land-based enhanced near-earth warning system of claim 4, characterized in that the number of the receiver antennas (112) is 3 or 4, and all the receiver antennas (112) constitute a regular polygon structure.
6. The satellite positioning land-based augmented-proximity warning system of claim 3, wherein the GBAS ground station (11) further comprises a low noise amplifier (116) and an antenna feeder arrestor (117) corresponding to each of the receiver antennas;
each low noise amplifier (116) is in communication connection with a corresponding receiver antenna (112) and reference receiver (111), respectively, and each antenna feed line arrester (117) is in communication connection with a corresponding receiver antenna (112) and reference receiver (111), respectively.
7. The satellite positioning land-based enhanced near-earth warning system of claim 3, wherein the very high frequency data broadcasting equipment (114) comprises two VHF transmitters and two VDB receivers;
the two VDB receivers are in one-to-one corresponding communication connection with the two VHF transmitters, the two VDB receivers are in communication connection with the ground data processing device (113) respectively, and the two VHF transmitters are in communication connection with the very high frequency data antenna (115) respectively.
8. The satellite positioning land-based augmentation near-ground warning system according to any one of claims 1 to 7, characterized in that the near-ground warning computer (2) has built-in data memory (21) and a processor (22);
the processor (22) is in communication connection with the data memory (21), the GBAS differential locator (1) and the alarm (3), respectively.
9. The satellite positioning land-based augmentation near ground warning system according to claim 8, characterized in that the data storage (21) stores global airport data and global terrain data.
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| CN113247283A (en) * | 2021-04-29 | 2021-08-13 | 中国电子科技集团公司第二十研究所 | Airborne display equipment based on satellite-based augmentation system and warning method |
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| CN113247283A (en) * | 2021-04-29 | 2021-08-13 | 中国电子科技集团公司第二十研究所 | Airborne display equipment based on satellite-based augmentation system and warning method |
| CN113247283B (en) * | 2021-04-29 | 2024-02-20 | 中国电子科技集团公司第二十研究所 | Onboard display equipment based on star-based enhancement system and alarming method |
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