CN103412303A - Communication satellite reflected signal remote sensing monitoring system and monitoring method thereof - Google Patents
Communication satellite reflected signal remote sensing monitoring system and monitoring method thereof Download PDFInfo
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Abstract
The invention relates to a communication satellite reflected signal remote sensing monitoring system and a monitoring method thereof. The system comprises a communication satellite, a remote sensing platform, a reflected signal receiver and an aluminum plate, wherein the communication satellite is used for continuously transmitting a plurality of direct microwave signals with different working wavebands; the reflected signal receiver is installed on the remote sensing platform and used for receiving reflected microwave signals which are formed by surface reflection of the direct microwave signals with the different working wavebands and performing separation, amplification, analogue-to-digital conversion and digital processing to the reflected microwave signals in accordance with the different working wavebands, so as to obtain a one-dimensional power oscillogram used for remote sensing monitoring of features in the different working wavebands; the aluminum plate is installed on the top end of the reflected signal receiver. According to the monitoring system and monitoring method, because the communication satellite is a geostationary satellite, the observation geometry does not change with the time, thereby overcoming the defect of change of the observation geometry of GNSS-R (Global Navigation Satellite System-Reflection), and additionally, because the communication satellite in the system provides multiple working wavebands, the system and monitoring method can be used in multiple different application fields.
Description
Technical field
The present invention relates to a kind of telstar reflected signal remote sense monitoring system and monitoring method thereof.
Background technology
Optics, infrared and microwave remote sensing are the main remote sensings of earth observation, and its corresponding sensor is operated in respectively visible light, infrared and microwave region.But there is limitation separately in these remote sensings, and simplified summary is as follows: optics and infrared remote sensing are subject to weather conditions, can not the round-the-clock all weather operations; Microwave remote sensing has overcome this shortcoming, and the SAR spatial resolution is high, but temporal resolution can't meet the demand of Real-Time Monitoring, and cost is higher, and passive microwave remote sensing also can be subject to the restriction than low spatial resolution.
Emerging GLONASS (Global Navigation Satellite System) reflected signal GNSS-R(Global Navigation Satellite System-Reflection) remote sensing technology is to utilize the reflected signal of Navsat to carry out remote sensing to atural object.With ocean, land face microwave remote sensing means such as existing scatterometer, radar altimeter, synthetic-aperture radar, compare, Navsat group GNSS can provide the signal of L-band endlessly, and do not need to develop special transmitter, the receiver of GNSS-R is a plurality of satellite-signals in field of view of receiver simultaneously, aspect remote sensing mechanism, belonging to two station/multistation radar modes, this mode of operation can improve spatial and temporal resolution greatly; Simultaneously, owing to being operated in the L-band that penetrability is stronger, so can monitor all-time anf all-weather.In addition, the GNSS-R receiver belongs to passive reception, itself does not need to transmit, so volume and weight is all very little, needed power consumption is also little, therefore, in atural object monitoring, has convenient, characteristics flexibly.The GNSS Navsat will provide accurate, free detectable signal for the mankind in coming few decades, and this detectable signal has long-term stability, therefore, this technology for monitoring atural object, analyze feature changes rule etc. ideal means be provided.
As shown in Figure 1, GNSS-R remote sensing system of the prior art comprises a plurality of GNSS satellite 1' and a GNSS-R receiver 2' substantially, wherein, each GNSS satellite 1' launches the L-band direct signal endlessly, after earth surface reflection, by special GNSS-R receiver 2', received, form two station/multistation radar operation modes.Yet characteristics of this GNSS-R remote sensing system are the observation how much constantly changed, and its service band only has L-band, and it is restricted in its remote sensing application.Existing GNSS-R remote sensing system still can't meet the monitoring needs fully as can be seen here.
Telstar (communications satellite) is the artificial earth satellite as communication relay point, and telstar is for forwarding radio signal, with realize between satellite communication earth station or earth station and spacecraft between communicate by letter.
The telstar of China mainly contains:
Dongfanghong: Dongfanghong-1 satellite, dfh-2 satellite, Dongfanghong-III satellite, No. four satellites of Dongfanghong;
Prosperous promise: No. one, prosperous promise, No. two, prosperous promise, No. three, prosperous promise, No. four, prosperous promise, No. five, prosperous promise, No. six, prosperous promise;
Culminant star: culminant star 5A, culminant star 6B, No. 8, culminant star, No. 9, culminant star, No. 10, culminant star, No. 11, culminant star;
Asia-Pacific: No. five, 2R, Asia-Pacific, Asia-Pacific satellite, No. six, Asia-Pacific satellite, No. seven, Asia-Pacific satellite;
Wherein, " No. six, prosperous promise " communication broadcast satellite is mounted with 24 C band transponder, 8 Ku band transponder and 1 S band transponder, satellite beams can cover the Asian-Pacific area and the part neighboring countries and regions that comprise that China is whole, therefore, than the GNSS satellite, the power of " No. six, prosperous promise " is higher, capacity is larger, signal cover is wider.
Because telstar is operated in microwave region (C, Ku and S-band), and signal power is larger, therefore can become effective microwave rf generator, only utilized at present the direct signal of telstar, and its direct signal was not utilized through the reflective information of clutter reflections, therefore, in view of similar to the GNSS-R Remote Sensing Principles, can research and develop a kind of telstar reflected signal remote sense monitoring system using telstar as effective emissive source, so that more service band to be provided.
Summary of the invention
The problem existed in order to solve above-mentioned prior art, the present invention aims to provide a kind of telstar reflected signal remote sense monitoring system and monitoring method thereof, to overcome the shortcoming of observation Geometrical change, and provides multiple service band, to meet the monitoring requirement.
The described a kind of telstar reflected signal remote sense monitoring system of one of the present invention comprises:
Launch continuously the telstar of the direct projection microwave signal of a plurality of different operating wave bands;
Remote-sensing flatform;
Be arranged on the reflection signal receiver on described remote-sensing flatform, it receives the reflected microwave signal of direct projection microwave signal after earth surface reflection of described a plurality of different operating wave bands, and according to described different operating wave band, described reflected microwave signal is separated, after amplification, analog to digital conversion and digital processing, obtained for the One-dimensional power oscillogram under the described different operating wave band of atural object remote sensing monitoring; And
Be arranged on the aluminium sheet on described reflection signal receiver top, it reflects the described direct projection microwave signal directly received, and the described reflected microwave signal that will directly receive from described earth's surface transfers to described reflection signal receiver.
In above-mentioned telstar reflected signal remote sense monitoring system, described reflection signal receiver comprises:
A plurality of Anneta modules that receive respectively the reflected microwave signal under described different operating wave band;
A plurality of RF front-end modules that are connected with described Anneta module respectively, each described RF front-end module receives the described reflected microwave signal of corresponding described Anneta module output, and this reflected microwave signal is carried out exporting corresponding radiofrequency signal after amplification filtering;
A plurality of hyperchannel Receiver Modules that are connected with described RF front-end module respectively, each described hyperchannel Receiver Module carries out exporting corresponding intermediate-freuqncy signal after amplification filtering to corresponding described radiofrequency signal;
A plurality of high-speed a/d modules that are connected with described hyperchannel Receiver Module respectively, each described high-speed a/d module carries out exporting corresponding sampled signal after analog to digital conversion to corresponding described intermediate-freuqncy signal;
A plurality of digital signal processing modules that are connected with described high-speed a/d module respectively, each described digital signal processing module carries out exporting corresponding original sampling data after digital processing to corresponding described sampled signal; And
A plurality of waveform shaping modules that are connected with described digital signal processing module respectively, each described waveform shaping module forms the One-dimensional power oscillogram under described different operating wave band according to corresponding original sampling data.
In above-mentioned telstar reflected signal remote sense monitoring system, each described Anneta module comprises the horizontal polarization subsignal that is respectively used to receive in described reflected microwave signal and horizontally-polarized antenna and the vertical polarized antenna of vertical polarization subsignal.
In above-mentioned telstar reflected signal remote sense monitoring system, each described RF front-end module comprises successively and to connect:
The emission path unit, it is for carrying out power amplification and filtering to described reflected microwave signal; And
Receive path unit, it carries out low noise for the described reflected microwave signal to overpower amplification and filtering and amplifies and filtering again, and exports described radiofrequency signal.
In above-mentioned telstar reflected signal remote sense monitoring system, described emission path unit comprises power amplifier and the first wave filter connected successively.
In above-mentioned telstar reflected signal remote sense monitoring system, described reception path unit comprises low noise amplifier and the second wave filter connected successively.
In above-mentioned telstar reflected signal remote sense monitoring system, described digital signal processing module comprises connected DSP(digital signal processing) chip and FPGA(field programmable gate array) chip.
In above-mentioned telstar reflected signal remote sense monitoring system, described aluminium sheet is arranged on the top of described reflection signal receiver by a support.
Two described a kind of monitoring methods based on above-mentioned telstar reflected signal remote sense monitoring system of the present invention comprise the following steps:
Step S1, described telstar be the direct projection microwave signal of a plurality of different operating wave bands of emission continuously;
Step S2, described aluminium sheet reflects the described direct projection microwave signal directly received, and the reflected microwave signal of the direct projection microwave signal of described a plurality of different operating wave bands that will directly receive from described earth's surface transfers to described reflection signal receiver;
Step S3, described reflection signal receiver receives the reflected microwave signal of direct projection microwave signal after earth surface reflection of described a plurality of different operating wave bands, and according to described different operating wave band, described reflected microwave signal is separated, after amplification, analog to digital conversion and digital processing, obtained for the One-dimensional power oscillogram under the described different operating wave band of atural object remote sensing monitoring.
In above-mentioned telstar reflected signal remote-sensing monitoring method, described step S3 comprises:
Step S31, receive respectively the reflected microwave signal under described different operating wave band;
Step S32, carry out amplification filtering to the reflected microwave signal under described different operating wave band respectively, and export corresponding radiofrequency signal;
Step S33, carry out amplification filtering to corresponding described radiofrequency signal respectively, and export corresponding intermediate-freuqncy signal;
Step S34, carry out analog to digital conversion to corresponding described intermediate-freuqncy signal respectively, and export corresponding sampled signal;
Step S35, carry out digital processing to corresponding described sampled signal respectively, and export corresponding original sampling data; And
Step S36, form the One-dimensional power oscillogram under described different operating wave band according to corresponding original sampling data respectively.
Owing to having adopted above-mentioned technical solution, the present invention utilizes the microwave signal of existing telstar emission as signal source, and this signal is reflected signal receiver and receives after earth surface reflection, thereby realizes the remote sensing of the earth monitoring.Different from existing GNSS-R remote sensing monitoring mode is, because telstar is satellite, therefore observe several why not temporal evolutions, thereby can overcome the shortcoming of the observation Geometrical change of GNSS-R, and compared to the GNSS-R remote sensing system that L-band only is provided, the service band that telstar in the present invention (as No. six, prosperous promise) provides is more (as C-band, Ku wave band and S-band), and for different service bands, to soil moisture, vegetation, the ability difference of the atural object parameter detection such as accumulated snow, therefore, the present invention can use in a plurality of different applications.
The accompanying drawing explanation
Fig. 1 is the structural representation of GNSS-R remote sensing system of the prior art;
Fig. 2 is the structural representation of a kind of telstar reflected signal remote sense monitoring system of the present invention;
Fig. 3 is the structural representation of the reflection signal receiver in a kind of telstar reflected signal remote sense monitoring system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, provide preferred embodiment of the present invention, and be described in detail.
As shown in Figure 2,3, the present invention, i.e. a kind of telstar reflected signal remote sense monitoring system comprises:
Launch continuously the telstar 1 of the direct projection microwave signal of a plurality of different operating wave bands;
Remote-sensing flatform 2;
Be arranged on the reflection signal receiver 3 on remote-sensing flatform 2, it receives the reflected microwave signal of direct projection microwave signal after earth surface reflection of a plurality of different operating wave bands, and according to the different operating wave band, reflected microwave signal is separated, after amplification, analog to digital conversion and digital processing, obtained for the One-dimensional power oscillogram under the different operating wave band of atural object remote sensing monitoring; And
By support 5, be arranged on the aluminium sheet 4 on reflection signal receiver 3 tops, it reflects the direct projection microwave signal directly received, and the reflected microwave signal that will directly receive from earth's surface transfers to reflection signal receiver 3.
A plurality of Anneta modules 31 that receive respectively the reflected microwave signal under the different operating wave band; Specifically, each Anneta module 31 comprises level (H) the polaron signal that is respectively used to receive in reflected microwave signal and horizontally-polarized antenna 311 and the vertical polarized antenna 312 of vertical (V) polaron signal;
A plurality of RF front-end module 32(RF front-end modules that are connected with Anneta module 31 respectively 32 are near Anneta module 31), each RF front-end module 32 receives the reflected microwave signal of corresponding Anneta module 31 outputs, and this reflected microwave signal is carried out exporting corresponding radiofrequency signal after amplification filtering; Specifically, each RF front-end module 32 comprises successively and to connect: emission path unit 321, and it comprises power amplifier 3211 and the first wave filter 3212 connected successively, with for reflected microwave signal is carried out to power amplification and filtering; And reception path unit 322, it comprises the low noise amplifier 3221(LNA connected successively) and the second wave filter 3222, with the reflected microwave signal for to overpower amplification and filtering, carry out low noise and amplify and filtering again, can be effectively to the useful radiofrequency signal of subordinate's circuit transmission thereby guarantee;
A plurality of hyperchannel Receiver Modules 33 that are connected with RF front-end module 32 respectively, 33 pairs of corresponding radiofrequency signals of each hyperchannel Receiver Module carry out exporting corresponding intermediate-freuqncy signal after amplification filtering;
A plurality of high-speed a/d modules 34 that are connected with hyperchannel Receiver Module 33 respectively, 34 pairs of corresponding intermediate-freuqncy signals of each high-speed a/d module carry out exporting corresponding sampled signal after analog to digital conversion;
A plurality of digital signal processing modules 35 that are connected with high-speed a/d module 34 respectively, 35 pairs of corresponding sampled signals of each digital signal processing module carry out exporting corresponding original sampling data after digital processing; Specifically, each digital signal processing module 35 comprises connected dsp chip 351 and fpga chip 352; And
A plurality of waveform shaping modules 36 that are connected with digital signal processing module 35 respectively, each waveform shaping module 36 forms the One-dimensional power oscillogram under the different operating wave band according to corresponding original sampling data.
Monitoring method based on above-mentioned telstar reflected signal remote sense monitoring system comprises the following steps:
Step S1, telstar 1 is the direct projection microwave signal of a plurality of different operating wave bands of emission continuously;
Step S2, the direct projection microwave signal that 4 pairs of aluminium sheets directly receive reflects, and the reflected microwave signal of the direct projection microwave signal of a plurality of different operating wave bands that will directly receive from earth's surface transfers to reflection signal receiver 3;
Step S3, reflection signal receiver 3 receives the reflected microwave signal of direct projection microwave signal after earth surface reflection of a plurality of different operating wave bands, and according to the different operating wave band, reflected microwave signal is separated, after amplification, analog to digital conversion and digital processing, obtained for the One-dimensional power oscillogram under the different operating wave band of atural object remote sensing monitoring.
Above-mentioned steps S3 specifically comprises:
Step S31, receive respectively the reflected microwave signal under the different operating wave band by a plurality of Anneta modules 31;
Step S32, carry out amplification filtering to the reflected microwave signal under the different operating wave band respectively by a plurality of RF front-end modules 32, and export corresponding radiofrequency signal;
Step S33, carry out amplification filtering to corresponding radiofrequency signal respectively by a plurality of hyperchannel Receiver Modules 33, and export corresponding intermediate-freuqncy signal;
Step S34, carry out analog to digital conversion to corresponding intermediate-freuqncy signal respectively by a plurality of high-speed a/d modules 34, and export corresponding sampled signal;
Step S35, carry out digital processing to corresponding sampled signal respectively by a plurality of digital signal processing modules 35, and export corresponding original sampling data; And
Step S36, form the One-dimensional power oscillogram under the different operating wave band according to corresponding original sampling data respectively by a plurality of waveform shaping modules 36.
Existing " No. six, the prosperous promise " telstar of below take is example, again principle of work of the present invention is described.
" No. six, prosperous promise " launches C-band continuously, direct projection microwave signal under Ku wave band and S-band, these direct projection microwave signals are equipped on remote-sensing flatform 2 after earth surface reflection reflected microwave signal receiver 3 receives, aluminium sheet 4 in system is due to total reflection can occur, therefore directly into the direct projection microwave signal that is incident upon aluminium sheet 4 surfaces, can be reflected fully, and then can not be reflected signal receiver 3 and receive, simultaneously, if the reflected microwave signal of direct projection microwave signal after earth surface reflection directly received by aluminium sheet 4, also can after aluminium sheet 4 reflections, be reflected signal receiver 3 receives, thereby guaranteed that reflection signal receiver 3 only receives the reflected microwave signal through earth surface reflection, and can not receive the direct projection microwave signal.Reflection signal receiver 3 can receive C, the Ku of " No. six, prosperous promise " and the reflected microwave signal of S-band simultaneously by three Anneta modules 31, and after receiving reflected microwave signal, by other modules in reflection signal receiver 3 by the reflected microwave signal under three kinds of service bands separate, after amplification, analog to digital conversion and digital processing, obtain the One-dimensional power oscillogram of C-band, Ku wave band and S-band, finally utilize these power waveforms figure can carry out the atural object remote sensing monitoring.
In sum, the present invention has following beneficial effect:
1, the present invention, using the signal of existing telstar emission as emissive source, adopts special reflection signal receiver to receive the reflected signal of telstar; With existing microwave radiometer, compare with microwave remote sensors such as radars, this kind remote sense monitoring system cost is low, power consumption is little, simple to operate, maneuverability;
2, with existing GNSS-R receiver, compare, because telstar is satellite, so adopt the formed remote sensing system observation of reflection signal receiver of the present invention to fix for how much, overcome how much continuous shortcomings that change of observation of GNSS-R remote sense monitoring system;
3, with the L-band of existing GNSS-R remote sense monitoring system, compare, the service band of remote sense monitoring system of the present invention more (such as the microwave region that comprises the telstars such as C, Ku and S-band), therefore, can be applied in multiple different field, realize the detection to multiple atural object parameter.
Above-described, be only preferred embodiment of the present invention, not in order to limit scope of the present invention, the above embodiment of the present invention can also make a variety of changes.Be that simple, the equivalence that every claims according to the present patent application and description are done changes and modify, all fall into the claim protection domain of patent of the present invention.The present invention not detailed description be the routine techniques content.
Claims (10)
1. a telstar reflected signal remote sense monitoring system, is characterized in that, described system comprises:
Launch continuously the telstar of the direct projection microwave signal of a plurality of different operating wave bands;
Remote-sensing flatform;
Be arranged on the reflection signal receiver on described remote-sensing flatform, it receives the reflected microwave signal of direct projection microwave signal after earth surface reflection of described a plurality of different operating wave bands, and according to described different operating wave band, described reflected microwave signal is separated, after amplification, analog to digital conversion and digital processing, obtained for the One-dimensional power oscillogram under the described different operating wave band of atural object remote sensing monitoring; And
Be arranged on the aluminium sheet on described reflection signal receiver top, it reflects the described direct projection microwave signal directly received, and the described reflected microwave signal that will directly receive from described earth's surface transfers to described reflection signal receiver.
2. telstar reflected signal remote sense monitoring system according to claim 1, is characterized in that, described reflection signal receiver comprises:
A plurality of Anneta modules that receive respectively the reflected microwave signal under described different operating wave band;
A plurality of RF front-end modules that are connected with described Anneta module respectively, each described RF front-end module receives the described reflected microwave signal of corresponding described Anneta module output, and this reflected microwave signal is carried out exporting corresponding radiofrequency signal after amplification filtering;
A plurality of hyperchannel Receiver Modules that are connected with described RF front-end module respectively, each described hyperchannel Receiver Module carries out exporting corresponding intermediate-freuqncy signal after amplification filtering to corresponding described radiofrequency signal;
A plurality of high-speed a/d modules that are connected with described hyperchannel Receiver Module respectively, each described high-speed a/d module carries out exporting corresponding sampled signal after analog to digital conversion to corresponding described intermediate-freuqncy signal;
A plurality of digital signal processing modules that are connected with described high-speed a/d module respectively, each described digital signal processing module carries out exporting corresponding original sampling data after digital processing to corresponding described sampled signal; And
A plurality of waveform shaping modules that are connected with described digital signal processing module respectively, each described waveform shaping module forms the One-dimensional power oscillogram under described different operating wave band according to corresponding original sampling data.
3. telstar reflected signal remote sense monitoring system according to claim 2, it is characterized in that, each described Anneta module comprises the horizontal polarization subsignal that is respectively used to receive in described reflected microwave signal and horizontally-polarized antenna and the vertical polarized antenna of vertical polarization subsignal.
4. telstar reflected signal remote sense monitoring system according to claim 2, is characterized in that, each described RF front-end module comprises successively and to connect:
The emission path unit, it is for carrying out power amplification and filtering to described reflected microwave signal; And
Receive path unit, it carries out low noise for the described reflected microwave signal to overpower amplification and filtering and amplifies and filtering again, and exports described radiofrequency signal.
5. telstar reflected signal remote sense monitoring system according to claim 4, is characterized in that, described emission path unit comprises power amplifier and the first wave filter connected successively.
6. according to the described telstar reflected signal of claim 4 or 5 remote sense monitoring system, it is characterized in that, described reception path unit comprises low noise amplifier and the second wave filter connected successively.
7. telstar reflected signal remote sense monitoring system according to claim 2, is characterized in that, described digital signal processing module comprises connected dsp chip and fpga chip.
8. telstar reflected signal remote sense monitoring system according to claim 1 and 2, is characterized in that, described aluminium sheet is arranged on the top of described reflection signal receiver by a support.
9. the monitoring method based on telstar reflected signal remote sense monitoring system claimed in claim 1, is characterized in that, said method comprising the steps of:
Step S1, described telstar be the direct projection microwave signal of a plurality of different operating wave bands of emission continuously;
Step S2, described aluminium sheet reflects the described direct projection microwave signal directly received, and the reflected microwave signal of the direct projection microwave signal of described a plurality of different operating wave bands that will directly receive from described earth's surface transfers to described reflection signal receiver;
Step S3, described reflection signal receiver receives the reflected microwave signal of direct projection microwave signal after earth surface reflection of described a plurality of different operating wave bands, and according to described different operating wave band, described reflected microwave signal is separated, after amplification, analog to digital conversion and digital processing, obtained for the One-dimensional power oscillogram under the described different operating wave band of atural object remote sensing monitoring.
10. telstar reflected signal remote-sensing monitoring method according to claim 9, is characterized in that, described step S3 comprises:
Step S31, receive respectively the reflected microwave signal under described different operating wave band;
Step S32, carry out amplification filtering to the reflected microwave signal under described different operating wave band respectively, and export corresponding radiofrequency signal;
Step S33, carry out amplification filtering to corresponding described radiofrequency signal respectively, and export corresponding intermediate-freuqncy signal;
Step S34, carry out analog to digital conversion to corresponding described intermediate-freuqncy signal respectively, and export corresponding sampled signal;
Step S35, carry out digital processing to corresponding described sampled signal respectively, and export corresponding original sampling data; And
Step S36, form the One-dimensional power oscillogram under described different operating wave band according to corresponding original sampling data respectively.
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| CN106209185A (en) * | 2016-07-05 | 2016-12-07 | 吉林大学 | Microwave remote sensing signal adapter |
| CN112563700A (en) * | 2020-08-13 | 2021-03-26 | 中国科学院国家天文台 | Submillimeter wave multi-band imaging superconducting band-pass filter array system and implementation method |
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| CN114355346A (en) * | 2021-12-29 | 2022-04-15 | 北京卫星信息工程研究所 | Multi-satellite transceiving networking SAR system and ultra-large-width sea surface ship target imaging method |
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Application publication date: 20131127 |