KR101554260B1 - Satelite and system comprising the same - Google Patents

Abstract

A satellite station according to an embodiment of the present invention includes a mission planning unit for establishing a mission plan for executing an assigned mission from a ground station, a mission verification unit for verifying the mission assigned to the ground station or the mission plan, And a mission execution department for executing the mission received.

Description

[0001] SATELITE AND SYSTEM COMPRISING THE SAME [0002]

The present invention relates to satellite stations and satellite systems comprising them.

The present multi-purpose practical satellite mission plan is implemented using an image collection planning system (ICPS) and a mission planning system (MPS) of the ground station. Once the goal is set up, the ICPS will set up an imaging plan. The ICPS can determine whether the shooting mission is appropriate by taking into account at least one of the expected weather of the shooting area, the memory capacity of the satellite, energy balance and maneuverability.

If the shooting mission is deemed appropriate, the MPS will schedule specific mission orders. The MPS can generate a guidance profile necessary for satellite start-up at the time of image capture and a tracking parameter file necessary for driving the antenna at the time of image reception.

The MPS transmits the generated inductive profile, tracking parameter file, and command set at the time of communication with the satellite. When the satellite reaches the mission, it executes the planned command and performs the shooting mission.

In this way, in the present multipurpose practical satellite system, the ground station establishes the shooting plan and the mission plan in seconds, and the satellite performs the plan established by the ground station at the correct time. There is no safeguard except that the software installed on the satellite performs its own judgments and actions other than the planned mission. Here, the safeguard means that if an unexpected failure situation or malfunction is detected, the mission is stopped and the system switches to the safe mode and waits. In other words, the autonomous operation of the satellite is aimed at the sun when there is no mission and to perform safety measures in case of anomalies. In normal operation, the mission performance is planned in advance, It is a deterministic operation.

In such a multipurpose practical satellite system, since the shooting mission is planned to be performed one day before the shooting, there is a problem that it is difficult to perform the shooting mission in a hurry on the shooting day. And, even if the situation changes after the MPS sends the derivation profile, tracking parameter file, and command set to the satellite, it is difficult to replace it. For example, at the time of mission planning, the weather at the time of mission execution was predicted to be clear, but at the time of actual mission execution, the cloudy images may be useless.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a satellite station and a satellite system including the satellite station.

A satellite station according to an embodiment of the present invention includes a mission planning unit for establishing a mission plan for executing an assigned mission from a ground station, a mission verification unit for verifying the mission assigned to the ground station or the mission plan, And a mission execution department for executing the mission received.

The mission ordered from the ground station may include imaging of a given area.

The mission planning unit may generate at least one of a guidance profile necessary for activation of the satellite station, a tracking parameter file for driving the antenna, and a set of commands.

The mission verification unit can verify whether the mission commanded from the ground station or the mission plan is appropriate by using the weather information received from the weather satellite.

The mission verification unit may further utilize at least one of the maneuverability and the mission constraints of the satellite station to verify whether the mission or the mission plan is appropriate from the ground station.

The Mission Verification Department may determine alternative missions if the mission ordered from the ground station or the mission plan is not suitable.

Wherein the mission verification unit determines whether the mission assigned to the ground station or the mission plan is appropriate by using at least one of the weather information, the starting performance of the satellite station, and the mission limitation, An engine module, and a decision module for deriving a mission verification result according to a judgment of the inference engine module and transmitting the mission verification result to the mission planning part.

The inference engine module is based on a function that uses at least one of the importance of the photographing area, the weather of the photographing area, the presence of the substitute position, the satellite tilt angle of the substitute position, the power consumption at the substitute mission, can do.

The mission verification unit may further comprise an adaptation module adapted to adapt the function using feedback from the ground station.

A method for executing a mission of a satellite station according to an embodiment of the present invention includes the steps of receiving an instruction of a mission including information on a shooting area and shooting time from a first ground station, Verifying the mission using weather information, establishing a plan for the mission in accordance with a result of the verification, implementing a plan for the mission, and transmitting the result of the execution to a second ground station .

The step of verifying the mission may include determining whether the mission is appropriate using the meteorological information, and determining whether a substitute mission is possible if the mission is not suitable.

A satellite system according to an embodiment of the present invention includes a first ground station for commanding a mission of a satellite station, a determination unit for determining whether the mission commanded from the first ground station is appropriate, establishing a mission plan for executing the mission, A satellite station that verifies the mission and implements the mission plan, and a second ground station that receives the results of executing the mission plan from the satellite station.

According to an embodiment of the invention, the mission can be verified and planned within the satellite station. Accordingly, even if the weather conditions and the like are different from the time of the mission command, the substitute mission can be performed. In addition, by adapting a preset function to the satellite station, the mission performance result can be gradually improved.

1 is a block diagram illustrating a satellite system in accordance with one embodiment of the present invention.
FIG. 2 is a block diagram specifically illustrating a satellite station according to an embodiment of the present invention, and FIG. 3 is a flowchart illustrating a mission execution method of a satellite station according to an embodiment of the present invention.
FIG. 4 is a block diagram specifically illustrating a mission verification unit of a satellite station according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

1 is a block diagram illustrating a satellite system in accordance with one embodiment of the present invention.

1, the satellite system 10 includes a satellite station 100, a first ground station 200, a second ground station 300, and a weather satellite 400. [

The satellite station (100) receives a mission command message from the first ground station (200). The satellite station (100) determines whether the mission ordered from the first ground station is appropriate, establishes a mission plan for performing the mission, verifies the established mission plan, and implements a verified mission plan. Then, the satellite station 100 transmits the result of executing the mission plan to the second ground station 300. To this end, the satellite station 100 can receive weather data from the weather satellite 400. [

FIG. 2 is a block diagram specifically illustrating a satellite station according to an embodiment of the present invention, and FIG. 3 is a flowchart illustrating a mission execution method of a satellite station according to an embodiment of the present invention.

Referring to FIG. 2, the satellite system 10 includes a satellite station 100, a first ground station 200, a second ground station 300, and a weather satellite 400. The satellite station 100 includes the mission planning unit 110, the mission verification unit 120, and the mission execution unit 130.

The mission planning unit 110 determines whether the mission ordered from the first ground station 200 is appropriate, and establishes a mission plan for executing the mission. The mission verification unit (120) verifies the mission plan established by the mission planning unit (110). The mission execution unit 120 executes the mission plan that has been verified by the mission verification unit 120 and transmits the execution result to the second ground station 300. [

Hereinafter, it is assumed that the mission commanded from the first ground station 200 is an image capturing for a predetermined area.

Referring to FIGS. 2 and 3, the first ground station 200 selects an imaging target (S300). The first ground station 200 can select a shooting target using weather, mission limitation, and the like. Then, the first ground station 200 transmits a mission command to the mission planning unit 110 of the satellite station 100 (S302). The mission command can be transmitted using two to four satellite communication times per day. The mission command may include information on the photographing area and information on the photographing time, and may be transmitted through an uplink command (CMD) message.

The mission planning unit 110 requests the mission verification unit 120 to verify the mission before the photographing time commanded by the first ground station 200 (S304). The mission verification unit 120 receives the weather information from the weather satellite 400 (S306), and verifies the mission using the weather information (S308). The mission verification unit 120 verifies whether or not the designated mission is suitable by using the weather, the maneuvering performance, and the mission limitation, and judges whether or not the alternative mission is possible if it is not suitable. The mission verification unit 120 can use a predetermined rule to verify whether the commanded command is appropriate. A specific method by which the mission verification unit 120 verifies the mission will be described later.

Then, the mission verification unit 120 transmits the mission verification result to the mission planning unit 110 (S310), and the mission planning unit 110 establishes a mission plan based on the mission verification result (S312). The mission planning unit 110 can generate, for example, a guidance profile necessary for startup, a tracking parameter file necessary for driving an antenna at the time of receiving mission execution results, an instruction set, and the like. The mission planning unit 110 can establish a mission plan for the mission command received from the first ground station 200 when the mission verification unit 120 receives a result that the mission is appropriate. On the other hand, when receiving the result that the mission is not suitable from the mission verification unit 120, the mission planning unit 110 can establish a mission plan for the substitute mission received from the mission verification unit 120.

The mission planning unit 110 transmits a mission execution request for the established mission plan to the mission execution unit 130 (S314). In step S316, the mission execution unit 130 transmits the mission execution result, that is, the shot image, to the second ground station 300 in step S318.

For convenience of explanation, it is described that the first ground station 200 and the second ground station 300 are separate ground stations, but the present invention is not limited thereto. The first ground station 200 and the second ground station 300 may be the same ground station.

The mission planning unit 110 is configured to receive a mission verification result from the mission verification unit 120 and then establish a mission plan. However, the present invention is not limited thereto. The mission planning unit 110 may request the verification of the mission plan established by the mission verification unit 120 after receiving the mission command from the first ground station 200 and establishing the mission plan.

FIG. 4 is a block diagram specifically illustrating a mission verification unit of a satellite station according to an embodiment of the present invention.

4, the mission verification unit 120 is connected to the mission planning unit 110 and includes a mission verification module 122, an inference engine module 124, a decision module 126, and an adaptation module 128 .

The Mission Validation Module 122 converts weather information received from the meteorological satellite 400 into a usable form and performs tasks for verifying the mission.

An inference engine module (124) is a weather information module. Maneuverability, and mission constraints to determine if the mission is appropriate and to determine if an alternative mission is feasible if the mission is not appropriate. To this end, inference engine module 124 may be based on rules. The rules can be, for example, "change the mission script and guidance profile if the weather is cloudy and you can shoot the same area at different locations on the satellite".

Table 1 shows the various features used in the rule and the attributes of each feature.

No. Characteristic property One Importance of the shooting area height lowness 2 Weather in the shooting area Sunny blur 3 Presence of alternate location has exist none 4 Satellite tilt angle of alternate position Big small 5 Power consumption at alternate mission Big small 6 Conflict with an already planned mission has exist none

The decision module 126 derives the conclusions of the mission verification unit 120 and delivers the mission verification result to the mission planning unit 110.

The adaptation module 128 adapts the membership function for the various features used in the rules and rules of the inference engine module 124. To this end, the adaptation module 128 may receive feedback on mission execution from either the first ground station 200 or the second ground station 300. The adaptation module 128 may adapt the membership function for the features used in the rules and rules of the inference engine module 124 using the feedback result.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Claims (12)

A mission planning department that establishes a mission plan for executing the duties commissioned from the ground station,
An Mission Verification Department which verifies the Mission ordered from the ground station or the Mission Plan, and
A mission execution unit for executing a mission commanded from the ground station
Lt; / RTI >
The mission verification unit
An inference engine module for verifying the mission or the mission plan based on the rule from the ground station using at least one of the weather information, the maneuverability, and the mission limitation,
A decision module for deriving a mission verification result according to the judgment of the inference engine module and transmitting the result of the mission verification to the mission planning part,
And an adaptation module for receiving feedback on mission execution from the ground station and adapting the function for the rule of the inference engine module using the feedback result,
The rule uses at least one of the importance of the shooting region, the weather of the shooting region, the presence of the substitute position, the satellite tilt angle of the substitute position, the power consumption at the substitute mission, and the conflict between the planned mission and the planned mission. The method according to claim 1,
The mission ordered from the above ground station includes imaging of a given area. 3. The method of claim 2,
The mission planning unit,
Generating at least one of a guidance profile necessary for the activation of the satellite station, a tracking parameter file for driving the antenna, and a set of commands. delete delete delete delete delete delete In the method of executing the mission of the satellite station,
Receiving an instruction of the mission including information on the shooting area and information on the shooting time from the first ground station,
Verifying the mission using the photographing time and the weather information corresponding to the photographing area,
Establishing a plan for the mission in accordance with a result of the verification,
Executing a plan for the mission, and
Transmitting the result of the execution to the second ground station
/ RTI >
In the verifying step
Using at least one of the weather information, the maneuvering performance, and the mission restriction to verify the mission or the mission plan commanded from the first ground station based on the rules, determine the substitute mission, derive the mission verification result according to the judgment Receiving feedback on mission performance from the second ground station, adapting the function for the rule using feedback results,
Wherein the rules use at least one of the importance of the shooting region, the weather of the shooting region, the presence of the substitute position, the satellite tilt angle of the substitute position, the power consumption at the substitute mission, and the conflict between the planned mission and the planned mission. 11. The method of claim 10,
The step of verifying the task comprises:
Verifying the mission using the weather information, and
A step of judging whether or not an alternative task is possible according to the verification result
The method comprising: The first ground station, which orders the mission of the satellites,
A satellite station establishing a mission plan for executing the mission ordered from the first ground station, verifying the commanded mission and implementing the mission plan, and
A second ground station receiving the result of executing the mission plan from the satellite station
/ RTI >
The satellite station
Using at least one of the weather information, the maneuvering performance, and the mission restriction to verify the mission or the mission plan commanded from the first ground station based on the rules, determine the substitute mission, derive the mission verification result according to the judgment Receiving feedback on mission performance from the second ground station, adapting the function for the rule using feedback results,
Wherein the rule uses at least one of the importance of the shooting area, the weather of the shooting area, the presence of the substitute position, the satellite tilt angle of the substitute position, the power consumption of the substitute mission, and the conflict between the planned mission and the planned mission.

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