JPH0743456A - Delay-time calibrating apparatus in satellite distance measuring system - Google Patents
Delay-time calibrating apparatus in satellite distance measuring systemInfo
- Publication number
- JPH0743456A JPH0743456A JP18956693A JP18956693A JPH0743456A JP H0743456 A JPH0743456 A JP H0743456A JP 18956693 A JP18956693 A JP 18956693A JP 18956693 A JP18956693 A JP 18956693A JP H0743456 A JPH0743456 A JP H0743456A
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- Prior art keywords
- signal
- delay time
- transmission
- distance
- reception
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は人工衛星等の飛翔体の測
位（測距）を行うための衛星測距システムにおいて地球
局内における遅延時間の校正を行うための遅延時間校正
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a delay time calibration device for calibrating a delay time in an earth station in a satellite ranging system for positioning (ranging) a flying object such as an artificial satellite.
【０００２】[0002]
【従来の技術】一般に、この種の衛星測距システムとし
て、例えば、特開昭５６−２０３４２号公報及び特開昭
５９−１６９２３３号公報に記載された技術が知られて
いる。この衛星測距システムでは人工衛星と地球局との
間の距離を精度よく測定するためには、地球局内におけ
る遅延時間を予め求めておく必要がある。2. Description of the Related Art Generally, as this type of satellite ranging system, for example, the techniques described in JP-A-56-20342 and JP-A-59-169233 are known. In this satellite ranging system, in order to accurately measure the distance between the artificial satellite and the earth station, it is necessary to obtain the delay time in the earth station in advance.
【０００３】ここで、図２を参照して従来の測距システ
ムについて概説する。Here, a conventional distance measuring system will be outlined with reference to FIG.
【０００４】測距システムでは人工衛星ＡＳと地球局Ｅ
Ｓとが備えられており、測距を行う際には、測距トーン
発生器１１から測距トーンが送信測距トーン信号として
送出される。この送信測距トーン信号は遅延時間計測器
１２及び送信機１３に与えられる。送信機１３では送信
測距トーン信号によって搬送波（地球局搬送波）を変調
（例えば、ＰＭ変調）して変調信号として伝送路１４を
介して電力増幅器１５に与える。この電力増幅器１５は
空中線１６の近傍に配置されており、変調信号を電力増
幅して空中線１６から送信信号（地球局送信信号）とし
て人工衛星ＡＳに対して送出される。In the ranging system, the artificial satellite AS and the earth station E are used.
S is provided, and when the distance measurement is performed, the distance measurement tone generator 11 sends the distance measurement tone as a transmission distance measurement tone signal. This transmission distance measurement tone signal is given to the delay time measuring device 12 and the transmitter 13. The transmitter 13 modulates the carrier wave (earth station carrier wave) by the transmission distance measurement tone signal (for example, PM modulation) and supplies it as a modulation signal to the power amplifier 15 via the transmission line 14. The power amplifier 15 is arranged in the vicinity of the antenna 16, power-amplifies the modulated signal, and sends out from the antenna 16 as a transmission signal (earth station transmission signal) to the artificial satellite AS.
【０００５】人工衛星ＡＳでは空中線１７で地球局送信
信号を受信信号として受け、受信機１８において受信信
号を復調して測距トーン信号を再生測距トーン信号とし
て得る。送信機１９では再生測距トーン信号で地球局搬
送波とは異なる搬送波周波数を有する搬送波（人工衛星
搬送波）を変調して（例えば、ＰＭ変調）送信信号（人
工衛星送信信号）として空中線１７から地球局ＥＳに対
して送出する。In the artificial satellite AS, the earth station transmission signal is received by the antenna 17 as a reception signal, and the reception signal is demodulated by the receiver 18 to obtain a ranging tone signal as a reproduced ranging tone signal. The transmitter 19 modulates a carrier wave (artificial satellite carrier wave) having a carrier frequency different from that of the earth station carrier wave with the reproduced ranging tone signal (for example, PM modulation) to generate a transmission signal (artificial satellite transmission signal) from the antenna 17 to the earth station. Send to ES.
【０００６】地球局ＥＳでは人工衛星送信信号を空中線
１６で受信信号として受け、スイッチ２０を介して電力
増幅器２１で電力増幅した後伝送路２２を介して増幅信
号として受信機２３に与える（なお、電力増幅器２１は
空中線１６の近傍に配置されている）。受信機２３では
増幅信号を復調して測距トーン信号を受信測距トーン信
号として得る。そして、この受信測距トーン信号は遅延
時間計測器１２に与えられる。In the earth station ES, the artificial satellite transmission signal is received by the antenna 16 as a reception signal, power-amplified by the power amplifier 21 via the switch 20, and then given as an amplified signal to the receiver 23 via the transmission line 22 (note that The power amplifier 21 is arranged near the antenna 16). The receiver 23 demodulates the amplified signal and obtains the ranging tone signal as a received ranging tone signal. Then, the received distance measuring tone signal is given to the delay time measuring device 12.
【０００７】前述のように、遅延時間計測器１２には送
信測距トーン信号が与えられており、遅延時間計測器１
２ではまず送信測距トーン信号を受けると、その受信時
刻を内蔵時計で知り、送信測距トーン時刻として記憶す
る。次に、遅延時間計測器１２では受信測距トーン信号
を受けると、その受信時刻を内蔵時計で知り、受信測距
トーン時刻として記憶する。そして、遅延時間計測器１
２では送信測距トーン時刻及び受信測距トーン時刻から
遅延時間（測距遅延時間）を求める。演算器（図示せ
ず）ではこの測距遅延時間に基づいて人工衛星ＡＳと地
球局ＥＳとの距離を求め往復距離として出力する。As described above, the delay time measuring device 12 is supplied with the transmission distance measurement tone signal, and the delay time measuring device 1
In 2, when the transmission distance measuring tone signal is first received, the reception time is known by the built-in clock and stored as the transmission distance measuring tone time. Next, when the delay time measuring device 12 receives the reception distance measurement tone signal, the reception time is known by the built-in clock and is stored as the reception distance measurement tone time. And the delay time measuring device 1
In 2, the delay time (distance measurement delay time) is obtained from the transmission distance measurement tone time and the reception distance measurement tone time. An arithmetic unit (not shown) obtains the distance between the artificial satellite AS and the earth station ES on the basis of this distance measurement delay time and outputs it as a round trip distance.
【０００８】ところで、人工衛星ＡＳと地球局ＥＳとの
距離を精度よく求めるためには、地球局内（特に送信系
及び受信系）における遅延時間（伝送遅延時間）を知る
必要がある。このため、従来の測距システムでは伝送遅
延時間を求める際には、スイッチ２０によって電力増幅
器２１と空中線１６とを切り離し電力増幅器２１と周波
数変換器２４とを接続する。これによって、電力増幅器
１５の出力（送信信号）を減衰器２５を介して周波数変
換器２４に与えてここで受信周波数に変換した後、受信
信号として電力増幅器２１に与える。遅延時間計測器１
２によって前述したように送信測距トーン時刻及び受信
測距トーン時刻から遅延時間（地球局遅延時間）を求め
る。By the way, in order to accurately obtain the distance between the artificial satellite AS and the earth station ES, it is necessary to know the delay time (transmission delay time) within the earth station (in particular, the transmission system and the reception system). Therefore, in the conventional distance measuring system, when the transmission delay time is obtained, the power amplifier 21 and the antenna 16 are separated by the switch 20 and the power amplifier 21 and the frequency converter 24 are connected. As a result, the output (transmission signal) of the power amplifier 15 is given to the frequency converter 24 via the attenuator 25, converted into the reception frequency here, and then given to the power amplifier 21 as a reception signal. Delay time measuring device 1
As described above in 2, the delay time (earth station delay time) is obtained from the transmission distance measurement tone time and the reception distance measurement tone time.
【０００９】このようにして、地球局遅延時間を予め求
めておき、人工衛星ＡＳと地球局ＥＳとの距離を求める
際、測距遅延時間を地球局遅延時間で補正するようにし
ている。In this way, the earth station delay time is obtained in advance, and when the distance between the artificial satellite AS and the earth station ES is obtained, the distance measurement delay time is corrected by the earth station delay time.
【００１０】[0010]
【発明が解決しようとする課題】従来の測距システムで
は地球局遅延時間を校正する都度スイッチスイッチを切
替制御する必要があり、この結果、地球局遅延時間の校
正（計測）と測距遅延時間を計測する時間帯が異なって
しまい、実際に測距遅延時間を計測する時間における地
球局遅延時間を計測することが不可能である。In the conventional distance measuring system, it is necessary to switch and control the switch each time the earth station delay time is calibrated. As a result, the earth station delay time is calibrated (measured) and the distance measurement delay time is adjusted. Since the time zone for measuring is different, it is impossible to measure the earth station delay time at the time of actually measuring the distance measurement delay time.
【００１１】ところで、地球局においては種々の要因で
地球局遅延時間が変動する。例えば、温度変動によって
各機器における遅延時間が変動するばかりでなく、空中
線近傍に配置される機器と局舎とを結ぶケーブル等の機
械的張力によっても遅延時間が変動する。このため、従
来の測距システムでは精度よく人工衛星と地球局との距
離を求めることが難しいという問題点がある。In the earth station, the earth station delay time varies due to various factors. For example, not only the delay time of each device changes due to temperature fluctuations, but also the delay time changes due to mechanical tension of a cable or the like connecting the device arranged near the antenna to the station building. Therefore, there is a problem that it is difficult to accurately determine the distance between the artificial satellite and the earth station with the conventional distance measuring system.
【００１２】本発明の目的は人工衛星と地球局との距離
を精度よく求めることができる遅延時間校正装置を提供
することにある。An object of the present invention is to provide a delay time calibrating device that can accurately determine the distance between an artificial satellite and an earth station.
【００１３】[0013]
【課題を解決するための手段】本発明によれば、送信測
距トーン信号に応じて送信系によって地球局から送信信
号を人工衛星に送信して前記地球局で該人工衛星からの
再生測距トーン信号を含む送信信号を受信信号として受
信して受信系によって前記再生測距トーン信号を受信測
距トーン信号として受け前記送信測距トーンの送出と前
記受信測距トーン信号の受信の間の送受信遅延時間に応
じて前記地球局と前記人工衛星との距離を計測距離とし
て計測する衛星測距システムに用いられ、前記送信系及
び前記受信系における遅延時間を地球局遅延時間として
該地球局遅延時間で前記送受信遅延時間を校正するよう
にした遅延時間校正装置において、前記計測距離を計測
する際前記送信信号をピックアップしてピックアップ信
号とするピックアップ手段と、該ピックアップ信号を前
記受信系に送出信号として送出するための送出手段と、
前記受信系を介して前記送出信号を受け前記送信測距ト
ーン信号を校正測距トーン信号として抽出する抽出手段
と、前記送信測距トーンの送出と前記校正測距トーン信
号の受信に基づいて前記地球局遅延時間を求める遅延時
間計測手段とを有することを特徴とする衛星測距システ
ムにおける遅延時間校正装置が得られる。According to the present invention, a transmission signal is transmitted from an earth station to an artificial satellite by a transmission system according to a transmission distance measurement tone signal, and the earth station reproduces and measures the distance from the artificial satellite. Transmission / reception between transmission of the transmission distance measurement tone and reception of the reception distance measurement tone signal by receiving a transmission signal including a tone signal as a reception signal and receiving the reproduced distance measurement tone signal as a reception distance measurement tone signal by a reception system. It is used in a satellite ranging system that measures the distance between the earth station and the artificial satellite as a measurement distance according to the delay time, and the earth station delay is the delay time in the transmitting system and the receiving system as the earth station delay time. In a delay time calibrating device adapted to calibrate the transmission / reception delay time with time, a pick-up signal for picking up the transmission signal to obtain a pickup signal when measuring the measurement distance. And flop means, and sending means for sending the pickup signal as a feed signal to said reception system,
Extraction means for receiving the transmission signal via the reception system and extracting the transmission distance measurement tone signal as a calibration distance measurement tone signal, and based on the transmission of the transmission distance measurement tone and the reception of the calibration distance measurement tone signal. There is provided a delay time calibration device in a satellite ranging system, characterized by having a delay time measuring means for obtaining an earth station delay time.
【００１４】[0014]
【実施例】以下本発明について実施例によって説明す
る。EXAMPLES The present invention will be described below with reference to examples.
【００１５】図１を参照して、この実施例では図２に示
す従来例と同一の構成要素について同一の参照番号を付
す。測距を行う際には、測距トーン発生器１１から測距
トーンが送信測距トーン信号として送出される。この送
信測距トーン信号は遅延時間計測器１２及び送信機１３
に与えられる。送信機１３では送信測距トーン信号によ
って搬送波（地球局搬送波）を変調して変調信号として
伝送路１４を介して電力増幅器１５に与える。この電力
増幅器１５は空中線１６の近傍に配置されており、変調
信号を電力増幅して空中線１６から送信信号（地球局送
信信号）として人工衛星ＡＳに対して送出される。Referring to FIG. 1, in this embodiment, the same components as those of the conventional example shown in FIG. 2 are designated by the same reference numerals. When performing distance measurement, the distance measurement tone generator 11 sends the distance measurement tone as a transmission distance measurement tone signal. This transmission distance measurement tone signal is transmitted to the delay time measuring device 12 and the transmitter 13.
Given to. The transmitter 13 modulates a carrier wave (earth station carrier wave) by the transmission distance measurement tone signal and supplies it as a modulation signal to the power amplifier 15 via the transmission line 14. The power amplifier 15 is arranged in the vicinity of the antenna 16, power-amplifies the modulated signal, and sends out from the antenna 16 as a transmission signal (earth station transmission signal) to the artificial satellite AS.
【００１６】一方、電力増幅器１５からの出力は減衰器
２５で予め定められたレベルに減衰されて拡散変調器２
６に減衰信号として与えられる。拡散変調器２６では疑
似雑音（ＰＮ）コード発生器２７からのＰＮコードによ
って減衰信号をスペクトラム拡散して拡散信号を生成し
て周波数変換器２８に与える。周波数変換器２８では拡
散信号周波数（送信周波数）を受信周波数に変換した
後、受信拡散信号とする。On the other hand, the output from the power amplifier 15 is attenuated to a predetermined level by the attenuator 25 and the spread modulator 2
6 is provided as an attenuation signal. In the spread modulator 26, the attenuation signal is spread spectrum by the PN code from the pseudo noise (PN) code generator 27 to generate a spread signal, which is given to the frequency converter 28. The frequency converter 28 converts the spread signal frequency (transmission frequency) into the reception frequency, and then uses the reception spread signal.
【００１７】人工衛星ＡＳでは空中線１７で地球局送信
信号を受信信号として受け、受信機１８において受信信
号を復調して測距トーン信号を再生測距トーン信号とし
て得る。送信機１９では再生測距トーン信号で地球局搬
送波とは異なる搬送波周波数を有する搬送波（人工衛星
搬送波）を変調して送信信号（人工衛星送信信号）とし
て空中線１７から地球局ＥＳに対して送出する。In the artificial satellite AS, the earth station transmission signal is received by the antenna 17 as a reception signal, and the reception signal is demodulated by the receiver 18 to obtain a ranging tone signal as a reproduced ranging tone signal. The transmitter 19 modulates a carrier wave (artificial satellite carrier wave) having a carrier frequency different from that of the earth station carrier wave with the reproduced ranging tone signal and sends it out from the antenna 17 to the earth station ES as a transmission signal (artificial satellite transmission signal). .
【００１８】地球局ＥＳでは人工衛星送信信号を空中線
１６で受信信号として受け、加算器２９を介して電力増
幅器２１に与える。一方、前述の受信拡散信号も同様に
加算器２９を介して電力増幅器２１に与えられる。加算
器２９において受信拡散信号は受信信号に影響を与える
ことなく、受信拡散信号及び受信信号とは重畳され（以
下総称して加算信号と呼ぶ）、電力増幅器２１で電力増
幅された後伝送路２２を介して受信機２３及び拡散復調
器３０に与えられる。受信機２３では加算信号内の受信
信号のみを復調して測距トーン信号を第１の受信測距ト
ーン信号として得る（拡散信号は受信機２３では復調さ
れない）。そして、この第１の受信測距トーン信号は遅
延時間計測器１２に与えられる。一方、拡散復調器３０
ではＰＮコード発生器３１からのＰＮコードによって加
算信号内の受信拡散信号のみを逆拡散し（この際受信信
号はＰＮコードによって拡散されて拡散受信信号とな
る）、逆拡散信号を得る。そして、これら逆拡散信号及
び拡散受信信号はを受信機３２に与えられる。受信機３
２では逆拡散信号を復調して測距トーン信号を第２の受
信測距トーン信号として得る（拡散受信信号は受信機３
２では復調されない）。そして、第２の受信測距トーン
信号は遅延時間計測器３３に与えられる。In the earth station ES, the artificial satellite transmission signal is received by the antenna 16 as a reception signal and given to the power amplifier 21 via the adder 29. On the other hand, the above-mentioned received spread signal is also given to the power amplifier 21 via the adder 29. In the adder 29, the received spread signal does not affect the received signal, is superposed on the received spread signal and the received signal (hereinafter collectively referred to as an added signal), is power-amplified by the power amplifier 21, and is then transmitted through the transmission line 22. Are provided to the receiver 23 and the spread demodulator 30 via. The receiver 23 demodulates only the received signal in the added signal to obtain the ranging tone signal as the first received ranging tone signal (the spread signal is not demodulated by the receiver 23). Then, the first reception distance measurement tone signal is given to the delay time measuring device 12. On the other hand, the spread demodulator 30
Then, only the reception spread signal in the addition signal is despread by the PN code from the PN code generator 31 (at this time, the reception signal is spread by the PN code and becomes a spread reception signal) to obtain a despread signal. Then, the despread signal and the spread reception signal are given to the receiver 32. Receiver 3
2 demodulates the despread signal and obtains the ranging tone signal as the second reception ranging tone signal (the spread reception signal is the receiver 3).
2 does not demodulate). Then, the second reception distance measurement tone signal is given to the delay time measuring device 33.
【００１９】前述のように遅延時間計測器１２には送信
測距トーン信号が与えられており、遅延時間計測器１２
ではまず送信測距トーン信号を受けると、その受信時刻
を内蔵時計で知り、送信測距トーン時刻として記憶す
る。次に、遅延時間計測器１２では第１の受信測距トー
ン信号を受けると、その受信時刻を内蔵時計で知り、第
１の受信測距トーン時刻として記憶する。そして、遅延
時間計測器１２では送信測距トーン時刻及び第１の受信
測距トーン時刻から遅延時間（第１の測距遅延時間、つ
まり、地球局内遅延時間を含む遅延時間）を求める。As described above, the transmission distance measuring tone signal is given to the delay time measuring device 12, and the delay time measuring device 12 is supplied.
First, when the transmission distance measurement tone signal is received, the reception time is known by the built-in clock and stored as the transmission distance measurement tone time. Next, when the delay time measuring device 12 receives the first reception distance measurement tone signal, the reception time is known by the built-in clock and is stored as the first reception distance measurement tone time. Then, the delay time measuring device 12 obtains a delay time (first distance measurement delay time, that is, a delay time including the intra-earth station delay time) from the transmission distance measurement tone time and the first reception distance measurement tone time.
【００２０】遅延時間計測器３３にも上記の送信測距ト
ーン信号が与えられており、遅延時間計測器３３ではま
ず送信測距トーン信号を受けると、その受信時刻を内蔵
時計で知り、送信測距トーン時刻として記憶する。次
に、遅延時間計測器３３では第２の受信測距トーン信号
を受けると、その受信時刻を内蔵時計で知り、第２の受
信測距トーン時刻として記憶する。そして、遅延時間計
測器３３では送信測距トーン時刻及び第２の受信測距ト
ーン時刻から遅延時間（第２の測距遅延時間、つまり、
地球局局内遅延時間）を求める。The transmission distance measuring tone signal is also given to the delay time measuring device 33. When the delay time measuring device 33 first receives the transmission distance measuring tone signal, the reception time is known by the built-in clock and the transmission measuring signal is transmitted. Store as distance tone time. Next, when the delay time measuring device 33 receives the second reception distance measurement tone signal, the reception time is known by the built-in clock and is stored as the second reception distance measurement tone time. Then, in the delay time measuring device 33, the delay time (second distance measurement delay time, that is,
Calculate the delay time within the earth station.
【００２１】上述の第１及び第２の測距遅延時間は演算
器３４に与えられ、演算器３４では第１及び第２の測距
遅延時間に基づいて地球局ＥＳから人工衛星ＡＳまでの
距離を求め往復距離として出力する。つまり、演算器３
４では第１の測距遅延時間から第２の測距遅延時間を引
いて真正測距遅延時間を得て、この真正測距遅延時間か
ら往復距離を求める。The above-mentioned first and second distance-measuring delay times are given to the calculator 34, which calculates the distance from the earth station ES to the artificial satellite AS based on the first and second distance-measurement delay times. Is calculated and output as a round trip distance. That is, the arithmetic unit 3
In step 4, the second distance measuring delay time is subtracted from the first distance measuring delay time to obtain the true distance measuring delay time, and the round trip distance is obtained from the true distance measuring delay time.
【００２２】このように上述の実施例では地球局遅延時
間と測距遅延時間と同一の時間帯で計測することがで
き、種々の要因による地球局遅延時間の変動を直接測距
遅延時間に反映させることができ、その結果、精度よく
人工衛星と地球局との距離を求めることができる。As described above, in the above-mentioned embodiment, the earth station delay time and the distance measurement delay time can be measured in the same time zone, and the variation of the earth station delay time due to various factors is directly reflected in the distance measurement delay time. As a result, it is possible to accurately determine the distance between the artificial satellite and the earth station.
【００２３】[0023]
【発明の効果】以上説明したように本発明では地球局遅
延時間と測距遅延時間と同一の時間帯で計測することが
でき、種々の要因による地球局遅延時間の変動を直接測
距遅延時間に反映させることができる。従って、精度よ
く人工衛星と地球局との距離を求めることができるとい
う効果がある。As described above, according to the present invention, the earth station delay time and the distance measuring delay time can be measured in the same time zone, and the fluctuation of the earth station delay time due to various factors can be directly measured by the distance measuring delay time. Can be reflected in. Therefore, there is an effect that the distance between the artificial satellite and the earth station can be accurately obtained.
【図１】本発明による遅延時間校正装置を備える衛星測
距システムの一実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of a satellite ranging system including a delay time calibration device according to the present invention.
【図２】従来の衛星測距システムを説明するためのブロ
ック図である。FIG. 2 is a block diagram for explaining a conventional satellite ranging system.
１１ 測距トーン発生器 １２，３３ 遅延時間計測器 １３，１９ 送信機 １４，２２ 伝送路 １５，２１ 増幅器（電力増幅器） １６，１７ 空中線 １８，２３，３２ 受信機 ２０ スイッチ ２４，２８ 周波数変換器 ２５ 減衰器 ２６ 拡散変調器 ２７，３１ ＰＮコード発生器 ２９ 加算器 ３０ 拡散復調器 ３４ 演算器 11 Distance-measuring tone generator 12,33 Delay time measuring device 13,19 Transmitter 14,22 Transmission line 15,21 Amplifier (power amplifier) 16,17 Antenna 18,23,32 Receiver 20 Switch 24,28 Frequency converter 25 Attenuator 26 Spreading modulator 27, 31 PN code generator 29 Adder 30 Spreading demodulator 34 Operator
Claims (2)
って地球局から送信信号を人工衛星に送信して前記地球
局で該人工衛星からの再生測距トーン信号を含む送信信
号を受信信号として受信して受信系によって前記再生測
距トーン信号を受信測距トーン信号として受け前記送信
測距トーンの送出と前記受信測距トーン信号の受信の間
の送受信遅延時間に応じて前記地球局と前記人工衛星と
の距離を計測距離として計測する衛星測距システムに用
いられ、前記送信系及び前記受信系における遅延時間を
地球局遅延時間として該地球局遅延時間で前記送受信遅
延時間を校正するようにした遅延時間校正装置におい
て、前記計測距離を計測する際前記送信信号をピックア
ップしてピックアップ信号とするピックアップ手段と、
該ピックアップ信号を前記受信系に送出信号として送出
するための送出手段と、前記受信系を介して前記送出信
号を受け前記送信測距トーン信号を校正測距トーン信号
として抽出する抽出手段と、前記送信測距トーンの送出
と前記校正測距トーン信号の受信に基づいて前記地球局
遅延時間を求める遅延時間計測手段とを有することを特
徴とする衛星測距システムにおける遅延時間校正装置。1. A transmission signal is transmitted from an earth station to an artificial satellite by a transmission system according to a transmitted distance measurement tone signal, and a transmission signal including a reproduced distance measurement tone signal from the artificial satellite is received as a reception signal by the earth station. The earth station and the earth station according to a transmission / reception delay time between the reception of the reproduction distance measurement tone signal as a reception distance measurement tone signal by the reception system and the reception of the transmission distance measurement tone signal. Used in a satellite ranging system that measures the distance to an artificial satellite as a measured distance, and uses the delay time in the transmission system and the reception system as an earth station delay time to calibrate the transmission / reception delay time with the earth station delay time. In the delay time calibration device described above, a pickup means for picking up the transmission signal to obtain a pickup signal when measuring the measurement distance,
Sending means for sending the pickup signal to the receiving system as a sending signal; extracting means for receiving the sending signal via the receiving system and extracting the sending ranging tone signal as a calibration ranging tone signal; A delay time calibrating device in a satellite ranging system, comprising: delay time measuring means for obtaining the earth station delay time based on transmission of a transmission distance measuring tone and reception of the calibration distance measuring tone signal.
において、前記ピックアップ手段は前記送信系の出側に
接続されており、前記送信信号をスペクトラム変換して
拡散信号とするスペクトラム拡散手段と、該拡散信号周
波数を受信周波数に変換して前記ピックアップ信号とす
る周波数変換手段とを備えており、前送出手段は前記受
信信号及び前記ピックアップ信号とを加算して前記送出
信号を得る加算手段を備え、前記抽出手段は前記送出信
号を逆拡散して逆拡散信号を得る逆拡散手段と、該逆拡
散信号を復調して前記校正測距トーン信号を得る復調手
段とを備えていることを特徴とする衛星測距システムに
おける遅延時間校正装置。2. The delay time calibration device according to claim 1, wherein the pickup means is connected to an output side of the transmission system, and spread spectrum means for spectrum converting the transmission signal into a spread signal. And frequency conversion means for converting the spread signal frequency to a reception frequency to obtain the pickup signal, and the pre-transmission means adds an addition means for obtaining the transmission signal by adding the reception signal and the pickup signal. The extracting means includes despreading means for despreading the transmitted signal to obtain a despread signal, and demodulating means for demodulating the despread signal to obtain the calibration distance measurement tone signal. Delay time calibration device for satellite ranging system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18956693A JPH0743456A (en) | 1993-07-30 | 1993-07-30 | Delay-time calibrating apparatus in satellite distance measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18956693A JPH0743456A (en) | 1993-07-30 | 1993-07-30 | Delay-time calibrating apparatus in satellite distance measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0743456A true JPH0743456A (en) | 1995-02-14 |
Family
ID=16243483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18956693A Pending JPH0743456A (en) | 1993-07-30 | 1993-07-30 | Delay-time calibrating apparatus in satellite distance measuring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0743456A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007932A1 (en) * | 1999-07-26 | 2001-02-01 | Matsushita Electric Industrial Co., Ltd. | Method and device for distance detection |
| US6380767B1 (en) | 1999-10-27 | 2002-04-30 | Nec Corporation | Connection control circuit |
| JP2009198232A (en) * | 2008-02-20 | 2009-09-03 | National Institute Of Information & Communication Technology | Passive distance measuring apparatus |
| KR102105445B1 (en) * | 2019-05-27 | 2020-04-28 | 한국항공우주연구원 | Automatic time correction method and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58140661A (en) * | 1982-02-16 | 1983-08-20 | Nec Corp | Automatic real-time calibration type range finder |
-
1993
- 1993-07-30 JP JP18956693A patent/JPH0743456A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58140661A (en) * | 1982-02-16 | 1983-08-20 | Nec Corp | Automatic real-time calibration type range finder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007932A1 (en) * | 1999-07-26 | 2001-02-01 | Matsushita Electric Industrial Co., Ltd. | Method and device for distance detection |
| US6820031B1 (en) | 1999-07-26 | 2004-11-16 | Matsushita Electric Industrial Co., Ltd. | Method and device for distance detection |
| EP1209484A4 (en) * | 1999-07-26 | 2005-06-08 | Matsushita Electric Ind Co Ltd | Method and device for distance detection |
| US6380767B1 (en) | 1999-10-27 | 2002-04-30 | Nec Corporation | Connection control circuit |
| JP2009198232A (en) * | 2008-02-20 | 2009-09-03 | National Institute Of Information & Communication Technology | Passive distance measuring apparatus |
| KR102105445B1 (en) * | 2019-05-27 | 2020-04-28 | 한국항공우주연구원 | Automatic time correction method and system |
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