JPH11304903A - Scintillation monitoring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a scintillation monitoring apparatus by which a signal is received with high reliability and with high accuracy, by judging whether a scintillation caused by an ionospheric layer is generated or not. SOLUTION: In a monitoring apparatus, a global positioning system(GPS) signal is received by a GPS receiver 10, the reception power intensity of the GPG signal is judged by a scintillation judgment part 13, the generation of a scintillation is judged when the reception power intensity is judged to he reduced, its generation area is specified, and its judged result is displayed on a display part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scintillation monitoring device used for monitoring a scintillation in which radio waves used for satellite communication or the like flicker due to the ionosphere.

[0002]

2. Description of the Related Art As is well known, GPS (Global)
GP from the Positioning System satellite
In a GPS ranging system that receives an S signal and measures a distance, a GPS receiver is mounted on a moving body such as an automobile, and a plurality of, for example, four GPS receivers are arranged on a orbit by the GPS receiver.
By receiving GPS signals from the GPS satellites, the current position of the moving object is measured. Such a GPS ranging system uses a GPS receiver that continuously receives GPS signals from at least four GPS satellites orbiting in an orbit, thereby providing highly reliable and highly accurate position information. Acquisition is realized.

In the above-mentioned GPS ranging system, a GPS satellite transmitted from a GPS satellite by an ionosphere existing above the atmosphere surrounding the earth due to solar activity.
There is a problem in that the radio wave intensity of the S signal is reduced and so-called scintillation in which radio waves flicker occurs.

According to this, for example, in a state where a GPS receiver locks four GPS satellites and performs distance measurement, scintillation occurs, and GPS signals transmitted from the four GPS satellites respectively. When the reception power of any of the above is reduced, the lock of the GPS satellite is released, and the distance measurement operation is temporarily disabled, resulting in a problem that the distance measurement accuracy is deteriorated.

[0005] It is believed that the above-mentioned scintillation is caused by the ionosphere existing in the upper layer of the atmosphere. However, since the causal relationship with the ionosphere has not been elucidated, it is necessary to prevent the occurrence. Is difficult.

[0006] Such a problem is particularly problematic when constructing a GPS air traffic control system for controlling an aircraft using GPS information, which has been studied in the field of recent air traffic control, because the aircraft to be controlled is very difficult. Flying at high speeds is critical because the degradation in ranging accuracy can lead to navigation hazards.

[0007] The problem of the above-mentioned thinning is as follows.
For example, in the field of satellite communication, the same applies to the case where the reception intensity of the communication signal is reduced by the ionosphere, causing a reception error.

[0008]

As described above, when scintillation occurs due to the ionosphere, there is a problem that the radio wave intensity of the signal is reduced and the signal receiving accuracy is deteriorated. The present invention has been made in view of the above circumstances, and has been made to determine whether or not generation of scintillation due to the ionosphere has occurred, and to realize highly reliable and highly accurate signal reception. It is an object to provide a monitoring device.

[0009]

The present invention provides a GPS receiver for receiving a GPS signal transmitted from a GPS satellite,
Thinning determination means for detecting the decrease in the received power intensity of the GPS signal received by the GPS receiver and determining the occurrence of the sinusion in which the radio wave flickers, and identifying the occurrence area; And a display means for displaying the determination result of the means.

[0010] According to the above-mentioned configuration, the scintillation judging means judges the received power intensity of the GPS receiver, and when judging the reduction, judges that it is the occurrence of the scintillation. Identify. Then, the result of the determination made by the scintillation determining means is displayed on the display means. Therefore, it is possible to quickly respond to radio wave deterioration such as a GPS ranging system and satellite communication based on the display of the display means.

Further, the present invention is provided with a warning generating means. According to this, in response to the determination of the occurrence of the scintillation by the scintillation determining means, the warning generating means generates a warning, warns of the occurrence of radio wave degradation, and enables quick response.

Further, the present invention is provided with a caution information transmitting means. According to this, the attention information transmitting means transmits the attention information to a predetermined area via the geostationary satellite in response to the determination of the occurrence of the scintillation by the sination determination means, and warns the occurrence of radio wave degradation, Enables quick response in large areas.

Also, the present invention provides a GPS receiver for receiving a GPS signal transmitted from a GPS satellite, and a GPS receiver for receiving the GPS signal.
A detection unit configured to detect a decrease in the received power intensity of the GPS signal received by the receiver and determine the occurrence of a scintillation in which a radio wave flickers, and to specify an occurrence area thereof; An alerting means for issuing an alert in response to the determination of the occurrence of the illumination is provided with an alerting device.

According to the above construction, in response to the determination of the occurrence of the scintillation by the scintillation determining means, the warning generating means generates a warning and warns of the occurrence of radio wave deterioration, thereby enabling quick response. I do.

The present invention also provides a GPS receiver for receiving a GPS signal transmitted from a GPS satellite, and a GPS receiver for receiving the GPS signal.
A detection unit configured to detect a decrease in the received power intensity of the GPS signal received by the receiver and determine the occurrence of a scintillation in which a radio wave flickers, and to specify an occurrence area thereof; An attention information transmitting means for transmitting the attention information to a predetermined area via a geostationary satellite in response to the determination of the occurrence of the scintillation comprises a sinition monitoring device.

According to the above construction, the attention information transmitting means transmits the attention information to the predetermined area via the geostationary satellite in response to the determination of the occurrence of the scintillation by the scintillation determining means. And prompt response in large areas.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a scintillation monitoring apparatus according to an embodiment of the present invention. A GPS signal from a GPS satellite 11 deployed in orbit around the earth is transmitted to a GPS receiver 10 via an antenna 12. Is entered. In this GPS receiver 10,
One input terminal of the thinning determination unit 13 is connected. Solar activity information from a command unit (not shown) is input to the other input terminal of the sination determination unit 13, and the display unit 14 is connected to the output terminal.

The thinning determination unit 13 has a GPS
The GPS signal received by the receiver 10 is input. That is,
As shown in FIG. 2, when the GPS signal received by the GPS receiver 10 is input in step S1 as shown in FIG. 2, the thinning determination unit 13 determines the GPS signal in a predetermined determination cycle based on the solar activity information in step S2. In a state where the received power intensity is detected and the reduction in the power intensity is determined, it is determined that the occurrence of the scintillation, which is the phenomenon of the radio wave flicker caused by the ionosphere generated by the solar activity above the atmosphere surrounding the earth.

Then, in step S3, the orbiting GPS satellite 11 is specified, the generation area is determined, and the determination result is output to the display unit 14. Here, the display unit 14 displays the determination result of the sination determination unit 13.

Based on the determination result displayed on the display unit 14, the deterioration of the received radio wave in, for example, a GPS ranging system, a satellite communication system, or the like is grasped, and prompt response to the radio wave deterioration is possible.

Note that the above-mentioned thinning determination unit 13
Means that the judgment cycle is about 1H
If it occurs in the z cycle, it is set to be executed at intervals shorter than this cycle, for example, about 2 to 4 Hz. Then, the determination cycle is variably set based on solar activity information such as spring equinox and autumn equinox.

As described above, in the above-mentioned sination monitoring device, the GPS signal is received by the GPS receiver 10, the received power intensity of this GPS signal is determined by the thinning determination unit 13, and the received power intensity is reduced. Is determined, the occurrence is determined to be the occurrence of sination, the area where the occurrence is determined is specified, and the determination result is displayed on the display unit 14.

According to this, it is possible to judge the deterioration of the received radio wave based on the judgment result displayed on the display unit 14, and to quickly cope with the radio wave deterioration of the GPS ranging system and the satellite communication. Is done.

Further, the present invention is not limited to the above-described embodiment. For example, as shown in FIGS. 3 and 4, a warning generating unit 15 and a caution information transmitting unit 16 are connected to an output terminal of a simination determination unit 13. You may comprise so that it may arrange | position.
However, in FIGS. 3 and 4, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, in FIG. 3, for example, a warning generating section 15 for generating a warning sound is connected to the output end of the thinning determination section 13 so that the In the determined state, the warning generator 15 is configured to generate a warning in response to the determination of the occurrence of the scintillation. At the same time, the display unit 14 displays the result of the determination performed by the thinning determination unit 13.

According to this, both the warning from the warning generation unit 15 and the confirmation of the display on the display unit 14 make it possible to grasp the occurrence of the radio wave deterioration of the signal arriving from the sky, thereby realizing a quicker response. Is done.

FIG. 4 shows a state in which the caution information transmitting unit 16 is connected to the output terminal of the scintillation judging unit 13 and the scintillation judging unit 13 judges the occurrence of scintillation. The transmitting unit 16 is configured to generate the attention information including the area in which the scintillation has occurred in response to the determination of the occurrence of the scintillation. The signal is transmitted from the unit 16 to a geosynchronous satellite 17 deployed in a geosynchronous orbit, and is transmitted as warning information to a predetermined area via the geosynchronous satellite 17. In this way, in response to the determination of the occurrence of the scintillation, the caution information including the occurrence area is transmitted to the predetermined area via the geostationary satellite 17 to warn of the occurrence of radio wave degradation, and thereby, Swift response is realized.

At the same time, the display unit 14 displays the determination result of the sin determination unit 13 to determine the deterioration of the received radio wave, and promptly responds to the radio wave deterioration of the GPS ranging system or satellite communication. To achieve.

Further, in the above embodiment, the display unit 14
(See FIG. 1), the display unit 14 and the warning generation unit 15 (see FIG. 3), or the display unit 14 and the attention information transmission unit 16 (see FIG. 4).
) Is described as a representative example, but the present invention is not limited to this. For example, the display unit 14 and the warning generation unit 15
And the caution information transmitting unit 16 may be provided. According to this, an even better effect is expected.

Further, a warning generating unit 15 and a caution information transmitting unit 16 are provided after the
Even if they are arranged independently, substantially the same effect can be expected. Therefore, it is needless to say that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0031]

As described above in detail, according to the present invention, it is possible to determine whether or not the occurrence of the scintillation caused by the ionosphere, thereby realizing highly reliable and accurate signal reception. A scintillation monitoring device can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a scintillation monitoring device according to an embodiment of the present invention.

FIG. 2 is a flowchart shown to explain a thinning determination operation in FIG. 1;

FIG. 3 is a configuration diagram showing a cinchlation monitoring device according to another embodiment of the present invention.

FIG. 4 is a configuration diagram showing a scintillation monitoring device according to another embodiment of the present invention.

[Explanation of symbols]

 10 ... GPS receiver. 11 ... GPS satellite. 12 ... Antenna. 13 ... Sination determination unit. 14 Display part. 15 ... warning generation part. 16 ... attention information transmission part. 17 ... geostationary satellite.

Claims (7)

[Claims] 1. A GPS receiver for receiving a GPS signal transmitted from a GPS satellite, and detecting a decrease in the received power intensity of the GPS signal received by the GPS receiver to determine the occurrence of sination in which radio waves flicker. And a scintillation monitoring device comprising: a scintillation judging means for specifying an area where the scintillation occurred; and a display means for displaying a judgment result of the scintillation judging means. 2. The system according to claim 1, wherein said sine determination unit is configured to be capable of variably setting a determination cycle for detecting a decrease in received power of said GPS receiver and determining the occurrence of said sinelation. Item 2. The sinition monitoring device according to Item 1. 3. The sinelation monitoring apparatus according to claim 2, wherein said sienation determination means sets a determination cycle based on solar activity information. 4. The apparatus according to claim 1, further comprising a warning generating means for generating a warning in response to the determination of the occurrence of the scintillation by said thinning determination means.
4. The scintillation monitoring device according to any one of claims 1 to 3. 5. A warning information transmitting means for transmitting warning information to a predetermined area via a geostationary satellite in response to a determination of the occurrence of the scintillation by said thinning determination means. The scintillation monitoring device according to claim 1. 6. A GPS receiver for receiving a GPS signal transmitted from a GPS satellite, and detecting a decrease in received power intensity of the GPS signal received by the GPS receiver to determine the occurrence of a sination in which radio waves flicker. And a scintillation monitoring means comprising: a scintillation determining means for specifying an occurrence area thereof; and a warning generating means for generating a warning in response to the determination of the scintillation occurrence by the scintillation determining means. . 7. A GPS receiver for receiving a GPS signal transmitted from a GPS satellite, and detecting a decrease in received power intensity of the GPS signal received by the GPS receiver to determine the occurrence of a sination in which radio waves flicker. And a scintillation determining means for specifying the area of occurrence, and attention information for transmitting the attention information to a predetermined area via a geostationary satellite in response to the determination of the occurrence of the scintillation by the scintillation determining means. A sination monitoring device comprising a transmission unit.