KR20150124525A - Antenna Apparatus having satellite-detecting module and method for detecting satellite using the same - Google Patents
Antenna Apparatus having satellite-detecting module and method for detecting satellite using the same Download PDFInfo
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- KR20150124525A KR20150124525A KR1020140050810A KR20140050810A KR20150124525A KR 20150124525 A KR20150124525 A KR 20150124525A KR 1020140050810 A KR1020140050810 A KR 1020140050810A KR 20140050810 A KR20140050810 A KR 20140050810A KR 20150124525 A KR20150124525 A KR 20150124525A
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- Prior art keywords
- satellite
- signal
- search
- target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
- G01S19/235—Calibration of receiver components
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
According to an embodiment of the present invention, there is provided a method for searching a satellite of a portable antenna apparatus, the method comprising: referring to one of a plurality of TP information in a satellite search transponder (TP) list of an arbitrary satellite, Setting a device; Receiving a satellite signal; And determining whether the satellite signal is a signal of a satellite (hereinafter, referred to as "target satellite") to be searched for. If the first satellite signal is not a signal of a target satellite, Calculating a position of the target satellite based on the position of the target satellite; Changing the azimuth angle, elevation angle, or skew of the antenna, or a parameter of the satellite signal according to the calculation result; And determining whether a satellite signal to be received is a signal of a target satellite for each of a plurality of satellite search TP information of a satellite search TP list of the target satellite until receiving the signal of the target satellite The method of searching a satellite of a portable antenna apparatus according to the present invention further comprises the steps of:
Description
The present invention relates to an antenna apparatus having a satellite search module and a satellite search method using the antenna apparatus, and more particularly, to an antenna apparatus having a satellite search module capable of searching for a satellite even if a satellite signal of the satellite is changed, To a search method.
With the development of communication technologies using satellites, satellite broadcasting services as well as satellite communication services have been commercialized and widely used. In satellite broadcasting, it provides a TV broadcasting service using a geostationary satellite located at an altitude of about 36,000 km above the equator. Recently, a variety of portable antenna devices have been developed for viewing satellite broadcasts while camping or traveling.
In this regard, Fig. 1 schematically shows an example of a prior art portable satellite broadcasting system. Referring to FIG. 1, a conventional portable satellite broadcasting system includes an
The set-
In this conventional satellite broadcasting system, when the
A transponder is a power-amplifying repeater installed in a satellite, amplifies the radio waves received from terrestrial stations, and transmits the amplified signals to the ground. In general, one broadcasting satellite is equipped with several to several tens transponders. FIG. 2 shows a case where the
However, the satellite operator may change the satellite signal of the TP. For example, a situation may occur in which the frequency of the TP is changed to another frequency, or other variables such as symbol rate or polarization are changed. In this case, since the search TP information for the satellite stored in the
According to an embodiment of the present invention, an antenna apparatus having a satellite search module capable of searching for satellites even if a satellite signal of TP stored as TP information for satellite search is changed, and a satellite search method using the same can be provided.
According to an embodiment of the present invention, there is provided a method for searching a satellite of a portable antenna apparatus, the method comprising: referring to one of a plurality of TP information in a satellite search transponder (TP) list of an arbitrary satellite, Setting a device; Receiving a satellite signal; And determining whether the satellite signal is a signal of a satellite (hereinafter, referred to as "target satellite") to be searched for. If the first satellite signal is not a signal of a target satellite, Calculating a position of the target satellite based on the position of the target satellite; Changing the azimuth angle, elevation angle, or skew of the antenna, or a parameter of the satellite signal according to the calculation result; And determining whether a satellite signal to be received is a signal of a target satellite for each of a plurality of satellite search TP information of a satellite search TP list of the target satellite until receiving the signal of the target satellite The method of searching a satellite of a portable antenna apparatus according to the present invention further comprises the steps of:
According to an embodiment of the present invention, there is provided an antenna apparatus having a satellite search module for searching for a satellite, the satellite search module comprising: a tuner unit for setting a parameter of a satellite signal to be received from a satellite; An NID detector for detecting a satellite identification number (NID) from the received satellite signal; A storage unit for storing a satellite search TP list having a plurality of satellite search transponder (TP) information for each satellite for each of a plurality of satellites; (Hereinafter referred to as "target satellites") of the target satellite, and sequentially sets the parameters of the satellite signal with reference to the TP information for each of the plurality of TP information of the target satellite And a controller for determining whether the satellite signal is a signal of the target satellite when the satellite signal is received.
According to one or more embodiments of the present invention, even if one of the satellite search TP information becomes unusable, by storing the satellite search TP list including a plurality of satellite search TP information in correspondence with each satellite, It is possible to provide an advantage that information can be used instead.
According to one or more embodiments of the present invention, when one of a plurality of TP information in a satellite search TP list becomes unavailable or a predetermined time elapses, the antenna device automatically scans the entire frequency to obtain a satellite search TP list The TP information for all the satellites can be prevented from becoming unavailable at the same time, thereby providing a continuous phase broadcasting service.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic representation of a prior art satellite broadcast system,
2 is a view for explaining TP information for satellite search used in satellite search in the prior art,
3 is an exemplary block diagram of a satellite broadcast system according to a first embodiment of the present invention;
4 is a view for explaining an exemplary TP list for satellite search used in satellite search according to an embodiment of the present invention;
Figure 5 is an exemplary block diagram of a satellite search module in accordance with an embodiment of the present invention;
Figure 6 is a flow diagram illustrating an exemplary method of searching for satellites in accordance with an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method of managing a TP list for satellite search according to an embodiment of the present invention;
8 is a diagram for explaining a change in the TP list for satellite search by the method of FIG. 7,
9 is an exemplary block diagram of a satellite broadcasting system according to a second embodiment of the present invention;
10 is an exemplary block diagram of a satellite broadcasting system according to a third embodiment of the present invention,
11 is an exemplary block diagram of a satellite broadcasting system according to a fourth embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thickness of the components is exaggerated for an effective description of the technical content.
Where the terms first, second, etc. are used herein to describe components, these components should not be limited by such terms. These terms are used merely to distinguish one element from another and are not intended to limit the present invention.
In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.
Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are well known in the description of the invention and not significantly related to the invention do not describe confusion in describing the present invention.
3 is an exemplary block diagram of a satellite broadcast system in accordance with an embodiment of the present invention. Referring to FIG. 3, a satellite broadcasting system according to an embodiment may include an antenna device 100, a set-
According to one embodiment, the antenna apparatus 100 may include an
The
The LNB 120 can perform processes such as amplification of a satellite signal received from the
In the illustrated embodiment, the LNB 120 is coupled to the set-
In general, the LNB can be classified into various types according to the polarization, frequency, and output of the satellite signal to be received. For example, if a single polarized wave LNB can receive both a horizontal polarized wave and a vertical polarized wave based on the polarized wave, it is called a dual LNB if it can receive both the horizontal polarized wave and the vertical polarized wave, and a low band : 10.7GHz ~ 11.7GHz) and high band (11.7GHz ~ 12.75GHz) signals are received, it is called a universal LNB, and when only one band is received, it is called a single local LNB. Also, according to the output of the LNB, one output is called a single LNB, two is called a twin LNB, and four is called a quad LNB. According to an embodiment of the present invention, the
The driving
The
The satellite search module 200 searches for a specific satellite to which the
In a preferred embodiment, the
For each TP, the TP information includes frequency, symbol rate, polarization, and NID information. In Fig. 4, the satellite signal of TP1 is a satellite signal having a frequency of 11747 MHz, a symbol rate of 21300, H polarized wave, and NID specified by 173. Similarly, the satellite signal of TP2 has a frequency of 11785 MHz, a symbol rate of 21300, H polarized wave, and NID of 173. The TP3 satellite signal has a frequency of 11938 MHz, a symbol rate of 21300, an H-polarized wave, and a NID of 173.
Since the TP list in FIG. 4 is a TP list for one specific satellite, the NIDs in the three TP information are all the same. Thus, TP lists for any particular satellite generally have the same NID, but for some particular TPs the NID may be different. In this specification, it is assumed that the NIDs of the satellite signals received from one satellite are all the same for convenience of explanation.
The
The
The
The
Also, in a preferred embodiment, the
In order to change the TP list for satellite search, the
3, the antenna device 100 may further include a
In the embodiment of FIG. 3, the antenna device 100 is connected to the set-
The set-
Or alternatively, the set-
The satellite search module 200 may drive the
3, the
5 is an exemplary block diagram of a satellite search module in accordance with an embodiment of the present invention. Referring to FIG. 5, the
The
When a predetermined frequency and a symbol rate are set in the
In one embodiment, the
Likewise, the
The
According to an embodiment, the
The
Meanwhile, the storage device 325 may store a list of satellite search TPs for each satellite as shown in FIG. 4, and a predetermined TP list necessary for updating the satellite search search list or the satellite search TP list may be stored in the
Furthermore, the storage device 325 may store not only the TP list for satellite search for each satellite but also a TP list (hereinafter also referred to as "TP list for satellite broadcasting ") for the satellite broadcast channel provided by each satellite. The satellite broadcast TP list may include the same TP information as the satellite search TP list shown in FIG. That is, the TP list for satellite broadcasting for each satellite includes TP information of all satellite broadcasting channels provided by the satellite. For example, if the satellite provides 10 satellite broadcast channels, the satellite TP list of the satellite includes TP information for 10 TPs. And each TP information may include information about frequency, symbol rate, polarization, and NID as in FIG.
In one embodiment, the plurality of satellite search TP information belonging to the satellite search TP list is selected from the satellite broadcast TP information in the satellite broadcast TP list. For example, a satellite broadcast TP list for satellite having 10 satellite broadcast channels includes 10 satellite broadcast TP information, and if a plurality of pieces of TP information among the 10 satellite broadcast TP information are selected as satellite search TP information A list of TPs for satellite search as in Fig. That is, according to one embodiment, some TP information in the TP list for broadcasting satellites can constitute a TP list for satellite search.
A selection criterion for selecting a part of the TP information in the satellite broadcast TP list as the satellite search TP information may be arbitrarily set. In one embodiment, the TP information having a large signal strength can be selected as the TP information for satellite search. However, it goes without saying that other criteria may be applied according to the embodiment.
Although the TP list for satellite broadcasting may be stored only in the storage device 325 of the
3 and FIG. 5, the
In the embodiment of FIG. 5, the
6 is a flow diagram illustrating an exemplary method for searching for satellites in accordance with an embodiment of the present invention. Referring to FIG. 6, in step S110, the antenna apparatus 100 sets the antenna apparatus 100 by referring to the position information of the antenna apparatus and the TP information for satellite search of the target satellite.
In this step S110, the antenna apparatus 100 sets the
In the case where the antenna device 100 is a portable antenna device, since the user fixes the antenna device 100 on the ground surface while orienting the antenna device 100 in an arbitrary direction, Therefore, the azimuth angle of the
Meanwhile, in step S110, the antenna apparatus 100 refers to the satellite search TP information stored in the storage unit 240 (or the storage device 325 or an arbitrary storage unit) To be set. For example, the
At this time, preferably, TP information of one of a plurality of satellite search TP information in the satellite search TP list of the target satellite may be used as arbitrary satellite search TP information referred to in this step S110.
Thereafter, in step S120, the antenna apparatus 100 receives the satellite signal. That is, the
Next, in step S130, the antenna apparatus 100 determines which TP information in the entire satellite search TP list corresponds to the received satellite signal, and determines whether or not the received satellite signal is a signal of the target satellite have.
If the satellite signal received in step S120 is transmitted to the satellite search module 200 through the
As a TP information to be compared with a parameter of the satellite signal obtained at this time, in one preferred embodiment, all the TP information of all previously stored satellite search TP list can be compared with the parameter. For example, if the antenna apparatus 100 stores a satellite search TP list for a total of eight satellites and each satellite search TP list includes three satellite search TP information, then the total TP information is 24. Accordingly, the
If it is determined that the received satellite signal is a signal of the target satellite, it is determined that the satellite signal is a signal of the target satellite (S140_Y) The elevation angle, the elevation angle, and the skew of the
If the user operates the set-
3, when the set-
If it is determined in step S140 that the satellite signal is a signal of a satellite other than the target satellite (S140_N), the antenna device 100 is reset.
In order to reset the antenna apparatus 100, first, the position of the target satellite is calculated based on the satellite signal received in step S120 (S160). That is, since it is determined that the received satellite signal is a signal of a satellite other than the target satellite, the
At this time, the
After resetting the antenna apparatus 100 in accordance with steps S160 and S170, the antenna apparatus 100, in step S200, performs a plurality of satellite searches of the satellite search TP list of the target satellite It is determined whether or not the received satellite signal is a signal of the target satellite.
Specifically, it is checked whether the parameter of the received satellite signal corresponds to the TP information of the satellite search TP list of the target satellite referred to in step S110 or S170 (step S220). If the parameter of the received satellite signal corresponds to this TP information (S230_Y), this means that the antenna apparatus 100 has correctly searched the target satellite, so that the flow proceeds to step S150, And receives a satellite broadcast channel signal.
If the parameter of the satellite signal does not correspond to this TP information (S230_N), this may mean that the target satellite no longer uses the satellite signal corresponding to this TP information, (I.e., frequency, symbol rate, and polarization) through the
Thereafter, the
In some cases, even if the above-described determining step S200 is performed on all (N) pieces of satellite search TP information of the satellite search TP list of the target satellite, the situation in which the signal of the target satellite is not received (that is, S240_Y ) May occur. This means that the target satellite does not use any of the satellite signals corresponding to the plurality (N) of satellite search TP information of the target satellites of the antenna apparatus 100, The target satellite can not be searched.
According to one embodiment, in this case (S240_Y), the
7 is a flowchart illustrating a method of managing a TP list for satellite search according to an embodiment of the present invention. Referring to FIG. 7, in step S310, the
(i) The
(ii) When the
(iii) the
If it is determined that there is a need to change the TP list (S320_Y), the
When receiving a plurality of satellite signals from the target satellites in the scanning step S330, the
In this regard, FIG. 8 exemplarily shows that the satellite search TP list is changed. For example, if the satellite search TP list of the target satellite is the list of FIG. 4 and the
On the other hand, the above-described steps S310 to S340 as described above can be added to arbitrary positions on the flow chart of Fig. Preferably, in the case of (i) above, it is possible to determine whether to change the search TP list during the process from step S230 to step S150 (steps S310 and S320) May perform the above-described steps S330 and S340 while receiving the channel signal selected by the user and providing it to the set-top box 20 (i.e., during step S150).
In the case of (ii) above, it is possible to determine whether to change the search TP list during the process from step S240 to step S180 (steps S310 and S320), and thus during the execution of the exception process That is, during step S180), the above-described steps S330 and S340 may be executed. Or in an alternative embodiment, the exception handling step S180 itself may include steps S310 through S340.
Also, it will be understood that steps (S310 to S340) may be executed regardless of the flowchart of FIG. 6 since the above situation (iii) depends on the predetermined time period or the number of searches.
9 is an exemplary block diagram of a satellite broadcasting system according to a second embodiment of the present invention.
Compared with the first embodiment of FIG. 3, the antenna device 100 of the second embodiment of FIG. 9 has the same or similar configuration as the antenna device 100 of the first embodiment. However, in the second embodiment, the
In this embodiment, the
As described above, when the antenna device 100, the
10 is an exemplary block diagram of a satellite broadcasting system according to a third embodiment of the present invention.
Compared with the first embodiment of FIG. 3, the third embodiment differs from the first embodiment in that the satellite search module 600 is mounted in the remote controller 500 instead of the antenna device 400. That is, the satellite search module 600 does not necessarily need to be implemented in the antenna device 400, and may be installed in the remote controller 500 according to the embodiment, or may be installed in any device outside the antenna device 400 Do.
As described with reference to FIG. 3, the
The components of the antenna device 400 and the satellite search module 600 in FIG. 10 are the same or similar to those of the antenna device 100 and the satellite search module 200 in FIG. 3, A detailed description will be omitted.
11 is an exemplary block diagram of a satellite broadcasting system according to a fourth embodiment of the present invention.
The satellite broadcasting system according to the fourth embodiment may include an antenna device 700, a set-top box 800, and a
11, the set-top box 800 includes a
A satellite signal corresponding to a frequency and a symbol rate set by the
On the other hand, the satellite signal that has passed through the
The
The
On the other hand, when comparing the first embodiment of FIG. 3 with the fourth embodiment of FIG. 11, it can be seen that the antenna device 700 of FIG. 11 does not include a separate satellite search module. That is, it can be seen that there is no satellite search module in the antenna device 700, and instead, the components of the satellite search module 200 of FIG. 3 and the
11, the
As described above, although the present invention has been described with reference to the limited embodiments and drawings, the present invention is not limited to the above embodiments. It will be understood by those skilled in the art that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.
100:
120, 420:
170, 470: polarized wave setting unit 200, 300: satellite search module
210: tuner unit 220: NID detection unit
230: control unit 240:
311, 511:
320, 520: control unit
Claims (19)
(S110) setting the antenna apparatus by referring to one of a plurality of TP information of the satellite search transponder (TP) list of an arbitrary satellite and the position information of the antenna apparatus;
Receiving a satellite signal (S120); And
(S130, S140) of determining whether the satellite signal is a signal of a satellite to be searched (hereinafter, "target satellite"),
If the first satellite signal is not a signal of the target satellite,
Calculating a position of the target satellite based on the first satellite signal (S160);
Modifying an azimuth angle, an elevation angle, a skew, or a satellite signal parameter of the antenna according to the calculation result (S170); And
A step S200 of determining whether or not the received satellite signal is a signal of the target satellite, for each of a plurality of satellite search TP information of the satellite search TP list of the target satellite until receiving the signal of the target satellite, The method further comprising the steps of:
The step (S130) of determining whether the first satellite signal is a signal of the target satellite includes comparing the first satellite signal with a plurality of satellite search TP information in the entire satellite search TP list of satellites capable of being searched by the antenna apparatus Wherein the method further comprises the steps of:
Wherein the parameter of the satellite signal comprises at least one of frequency, symbol rate, and polarization of the satellite signal.
(S200) of determining whether or not the satellite signal is a signal of the target satellite for each of the plurality of satellite search TP information,
Setting the parameter of the satellite signal by referring to the TP information for satellite search (S170, S260); And
And a step (S230) of determining whether the satellite signal is a signal of a target satellite when the satellite signal is received (S230).
After executing the step of determining (S200) until receiving the signal of the target satellite,
Determining whether to change the satellite search TP list of the target satellite (S310); And
And changing the satellite search TP list of the target satellite according to the determination result (S330, S340).
The step (S310) of determining whether or not to change the satellite search TP list of the target satellite includes executing (S200) the determining step for arbitrary satellite search TP information of the satellite search TP list of the target satellite And if it does not receive the satellite signal corresponding to the TP information, decides to change the satellite search TP list of the target satellite.
The step S310 of determining whether to change the satellite search TP list of the target satellite determines to change the satellite search TP list when the number of searches for the target satellite becomes a predetermined value To the satellite.
If the signal of the target satellite is not received (S240-Y) even if the step S200 of performing the above-described determination for all the satellite search TP information in the satellite search TP list of the target satellite is not received And changing the TP list for the portable antenna apparatus.
Scanning the satellite signal of the target satellite over a predetermined number of frequency bands (S330); And
And adding (S340) TP information corresponding to at least one of the plurality of satellite signals received by the scanning to the satellite search TP list of the target satellite, A method of searching a satellite of a device.
A tuner unit 210 for setting a parameter of a satellite signal to be received from the satellite;
An NID detector 220 for detecting a satellite identification number (NID) from the received satellite signal;
A storage unit (230) for storing a satellite search TP list having a plurality of satellite search transponder (TP) information for each satellite for each of a plurality of satellites; And
Sets the parameters of the satellite signal by referring to the TP information sequentially for each of the plurality of TP information of the target satellite until the satellite signal of the satellite to be sought (hereinafter referred to as " target satellite ") is received And a controller (220) for determining whether the satellite signal is a signal of the target satellite upon receiving the satellite signal.
Wherein the antenna device further comprises a driving unit (150) for changing the azimuth angle, elevation angle, and / or skew of the antenna according to a first control signal of the control unit.
A low noise conversion converter (LNB) 120 receiving a satellite signal received from an antenna; And
And a polarization setting unit (170) configured to set the LNB (120) to receive only a specific polarization signal of the satellite signal by a second control signal of the controller.
And the satellite signal output from the LNB 120 is transmitted to the set-top box and the tuner unit.
Wherein the controller sets the frequency and the symbol rate of the satellite signal to be received.
If the tuner unit 210 sets a parameter by referring to any satellite search TP information of the satellite search TP list of the target satellite but fails to receive the satellite signal corresponding to the referenced TP information, And changes the satellite search TP list of the target satellite.
Wherein the controller changes the satellite search TP list of the target satellite when the number of ON-OFF times of power of the antenna apparatus becomes a predetermined value.
Wherein the controller changes the satellite search TP list of the target satellite when the number of searches for the target satellite reaches a predetermined value.
Wherein the controller is configured to scan the satellite signal from the target satellite over a predetermined frequency range and to transmit TP information corresponding to at least one of the plurality of satellite signals received by the scanning to satellite search And adding it to the TP list for the antenna.
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