IT1235572B - Perfezionamento nei sistemi di sondaggio ionosferico - Google Patents
Perfezionamento nei sistemi di sondaggio ionosfericoInfo
- Publication number
- IT1235572B IT1235572B IT8648153A IT4815386A IT1235572B IT 1235572 B IT1235572 B IT 1235572B IT 8648153 A IT8648153 A IT 8648153A IT 4815386 A IT4815386 A IT 4815386A IT 1235572 B IT1235572 B IT 1235572B
- Authority
- IT
- Italy
- Prior art keywords
- ionospheric
- improvement
- survey systems
- survey
- systems
- Prior art date
Links
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/0218—Very long range radars, e.g. surface wave radar, over-the-horizon or ionospheric propagation systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Quality & Reliability (AREA)
- General Physics & Mathematics (AREA)
- Noise Elimination (AREA)
- Mobile Radio Communication Systems (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8427440 | 1984-10-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8648153A0 IT8648153A0 (it) | 1986-06-19 |
IT1235572B true IT1235572B (it) | 1992-09-11 |
Family
ID=10568986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8648153A IT1235572B (it) | 1984-10-30 | 1986-06-19 | Perfezionamento nei sistemi di sondaggio ionosferico |
Country Status (9)
Country | Link |
---|---|
US (1) | US5230076A (it) |
AU (1) | AU632279B2 (it) |
CA (1) | CA1333921C (it) |
DE (1) | DE3546469C2 (it) |
FR (1) | FR2714777B1 (it) |
GB (1) | GB2253971B (it) |
IT (1) | IT1235572B (it) |
NL (1) | NL192282C (it) |
SE (1) | SE469649B (it) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA842579B (en) * | 1984-04-05 | 1984-11-28 | Gert Nel Janse Van Rensburg | Flow valve |
JPH0828754B2 (ja) * | 1993-06-30 | 1996-03-21 | 日本電気株式会社 | フレーム同期方式 |
US5339331A (en) * | 1993-09-09 | 1994-08-16 | Lockheed Corporation | Frequency hopping spread spectrum receiver |
US5463656A (en) * | 1993-10-29 | 1995-10-31 | Harris Corporation | System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna |
US5563918A (en) * | 1993-12-17 | 1996-10-08 | Rockwell International | Method of selecting optimum frequency in skywave communication apparatus |
US5428358A (en) * | 1994-05-03 | 1995-06-27 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus and method for ionospheric mapping |
US5604503A (en) * | 1995-03-27 | 1997-02-18 | Lockheed Martin Corporation | Multipath and co-channel signal preprocessor |
US5943629A (en) * | 1996-04-01 | 1999-08-24 | Tci International, Inc. | Method and apparatus for real-time ionospheric mapping and dynamic forecasting |
US5913158A (en) * | 1997-01-17 | 1999-06-15 | Sullivan; William B. | Dynamic temperature measurement |
US6067040A (en) * | 1997-05-30 | 2000-05-23 | The Whitaker Corporation | Low cost-high resolution radar for commercial and industrial applications |
US6331997B1 (en) * | 1998-08-04 | 2001-12-18 | Linkair Communication, Inc. | Scheme for spread spectrum multiple access coding |
US6078607A (en) * | 1998-08-10 | 2000-06-20 | Omnipont Corporation | Synchronization codes for use in communication |
EP0994575A1 (en) * | 1998-10-12 | 2000-04-19 | Hewlett-Packard Company | Extraction of primary and co-channel signals using propagation path metrics |
US6400315B1 (en) | 2000-07-20 | 2002-06-04 | The Boeing Company | Control system for electronically scanned phased array antennas with a mechanically steered axis |
GB2365239A (en) * | 2000-07-26 | 2002-02-13 | Alenia Marconi Systems Ltd | Near-vertical incidence skywave HF radar |
JP5006500B2 (ja) * | 2000-08-16 | 2012-08-22 | ザ・ボーイング・カンパニー | 移動プラットホームに双方向データサービスおよび生放送テレビ番組を提供するための方法および装置 |
US7921442B2 (en) * | 2000-08-16 | 2011-04-05 | The Boeing Company | Method and apparatus for simultaneous live television and data services using single beam antennas |
US6356239B1 (en) | 2000-08-23 | 2002-03-12 | The Boeing Company | Method for maintaining instantaneous bandwidth for a segmented, mechanically augmented phased array antenna |
US7054593B2 (en) * | 2000-09-28 | 2006-05-30 | The Boeing Company | Return link design for PSD limited mobile satellite communication systems |
US6847801B2 (en) * | 2001-08-30 | 2005-01-25 | The Boeing Company | Communications system and method employing forward satellite links using multiple simultaneous data rates |
KR20030048722A (ko) * | 2001-12-12 | 2003-06-25 | 박호영 | 전리층 반사파 대역에서의 데이터를 송신하기 전력의 축전방법 |
US6747960B2 (en) | 2001-12-21 | 2004-06-08 | The Boeing Company | Closed loop power control for TDMA links |
US20040137840A1 (en) * | 2003-01-15 | 2004-07-15 | La Chapelle Michael De | Bi-directional transponder apparatus and method of operation |
US7751337B2 (en) * | 2003-02-10 | 2010-07-06 | The Boeing Company | Method and apparatus for optimizing forward link data rate for radio frequency transmissions to mobile platforms |
US7515916B1 (en) | 2003-09-22 | 2009-04-07 | Veriwave, Incorporated | Method and apparatus for multi-dimensional channel sounding and radio frequency propagation measurements |
US7860497B2 (en) * | 2004-03-31 | 2010-12-28 | The Boeing Company | Dynamic configuration management |
DE102005038391A1 (de) * | 2004-10-01 | 2006-04-06 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Ermittlung eines Atmosphärenzustandes |
KR100655210B1 (ko) | 2004-12-06 | 2006-12-08 | 삼성전자주식회사 | 전리층을 이용한 통신 장치 및 방법 |
US7890821B2 (en) * | 2007-10-04 | 2011-02-15 | Veriwave, Inc. | Channel impairment emulator systems and methods |
US8189708B2 (en) * | 2008-08-08 | 2012-05-29 | The Boeing Company | System and method for accurate downlink power control of composite QPSK modulated signals |
WO2015013602A2 (en) * | 2013-07-26 | 2015-01-29 | Massachusetts Institute Of Technology | Accurate timing distribution by high-frequency radio |
RU2581627C2 (ru) * | 2014-05-21 | 2016-04-20 | Открытое акционерное общество "Омский научно-исследовательский институт приборостроения" (ОАО "ОНИИП") | Лчм-ионозонд |
US20160197669A1 (en) | 2014-12-11 | 2016-07-07 | Tesla Wireless Company LLC | Communication method and system that uses low latency/low data bandwidth and high latency/high data bandwidth pathways |
EP3230762B1 (en) * | 2014-12-12 | 2024-06-26 | Services Development Company LLC | Data transmission via a high frequency radio band |
US9693330B1 (en) * | 2015-07-30 | 2017-06-27 | Rockwell Collins, Inc. | Wideband high frequency based precision time transfer |
JP2020536458A (ja) * | 2017-10-03 | 2020-12-10 | スカイウェイブ・ネットワークス・エルエルシー | 送信された信号をプリコンディショニングする方法およびシステム |
JP2020537397A (ja) * | 2017-10-04 | 2020-12-17 | スカイウェイブ・ネットワークス・エルエルシー | 異なるホップ数を有する経路上で受信された信号の処理 |
WO2019070842A2 (en) | 2017-10-04 | 2019-04-11 | Skywave Networks Llc | TECHNIQUE FOR SELECTING THE BEST FREQUENCY FOR TRANSMISSION BASED ON CHANGING ATMOSPHERIC CONDITIONS |
GB2581931B (en) * | 2017-10-25 | 2022-10-12 | Skywave Networks Llc | Fuzzy logic for processing transmission meta data |
RU2685245C1 (ru) * | 2018-03-19 | 2019-04-17 | Акционерное общество "Научно-производственное предприятие "Полет" | Устройство для анализа и выбора оптимальных авиационных декаметровых радиоканалов с использованием лчм сигналов |
US11047967B2 (en) * | 2018-07-12 | 2021-06-29 | Southwest Research Institute | Removal of directwave high frequency signal for ionospheric sounder return processing |
FR3084489B1 (fr) * | 2018-07-26 | 2020-09-11 | Etat Francais Represente Par Le Delegue General Pour Larmement | Procede de detection d’au moins un equipement informatique compromis au sein d’un systeme d’information |
CN113992287B (zh) * | 2021-10-26 | 2024-05-24 | 封开低频时码授时台 | 一种低频时码授时信号载波频率选择方法及系统 |
CN114545357B (zh) * | 2022-04-25 | 2022-07-19 | 武汉大学 | 一种基于互谱分析的电离层Es层高分辨率垂直探测方法 |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL18014C (it) * | 1924-11-06 | |||
US2191277A (en) * | 1938-09-16 | 1940-02-20 | Rca Corp | Method of and apparatus for making measurements at ultra high frequencies |
US3020399A (en) * | 1959-01-09 | 1962-02-06 | Rixon Electronics Inc | Reduction of multipath effects by frequency shift |
NL253281A (it) * | 1959-07-02 | |||
GB1109444A (en) * | 1964-06-13 | 1968-04-10 | Emi Ltd | Improvements relating to interrogating apparatus for determining the optimum frequency for radio communication |
US3443230A (en) * | 1964-08-03 | 1969-05-06 | Granger Associates | Plural channel oblique ionosphere sounder system |
US3351859A (en) * | 1964-08-19 | 1967-11-07 | Motorola Inc | Communication system employing multipath rejection means |
US3495176A (en) * | 1965-01-25 | 1970-02-10 | Granger Associates | Ionosphere sounder system |
US3475684A (en) * | 1965-04-20 | 1969-10-28 | Emi Ltd | Interrogating apparatus for determining optimum frequency for radio communication |
US3443228A (en) * | 1965-11-22 | 1969-05-06 | Gen Atronics Corp | Optimum frequency communication system with different test frequencies in different test intervals |
US3532988A (en) * | 1969-01-23 | 1970-10-06 | Motorola Inc | Digital troposcatter multiplex communication system optimum frequency |
US3617891A (en) * | 1969-05-26 | 1971-11-02 | Emi Electronics Canada | Optimum frequency determining radio communication system |
US3961172A (en) * | 1973-12-03 | 1976-06-01 | Robert Stewart Hutcheon | Real-time cross-correlation signal processor |
US4197500A (en) * | 1976-11-01 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Army | Automatic channel selection |
US4140973A (en) * | 1977-03-29 | 1979-02-20 | Canadian Patents And Development Limited | Channel evaluation apparatus for point-to-point communications systems |
US4155040A (en) * | 1977-07-27 | 1979-05-15 | Rockwell International Corporation | Frequency programmable RF communications |
US4308617A (en) * | 1977-11-07 | 1981-12-29 | The Bendix Corporation | Noiselike amplitude and phase modulation coding for spread spectrum transmissions |
FR2461264A1 (fr) * | 1979-07-06 | 1981-01-30 | Commissariat Energie Atomique | Sondeur pour la detection et la mesure de phenomenes relatifs a l'environnement du globe terrestre |
FR2461411B1 (fr) * | 1979-07-13 | 1985-10-31 | Trt Telecom Radio Electr | Systeme de transmission de donnees utilisant les principes d'etalement du spectre |
US4334322A (en) * | 1979-10-26 | 1982-06-08 | E-Systems, Inc. | Communication management system for providing antijam/privacy capabilities for voice radio communications |
JPS56109023A (en) * | 1980-01-31 | 1981-08-29 | Nec Corp | Channel selection system |
US4280128A (en) * | 1980-03-24 | 1981-07-21 | The United States Of America As Represented By The Secretary Of The Army | Adaptive steerable null antenna processor |
US4309773A (en) * | 1980-04-18 | 1982-01-05 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus and method for radio channel selection |
US4328581A (en) * | 1980-06-20 | 1982-05-04 | Rockwell International Corporation | Adaptive HF communication system |
DE3211325C1 (de) * | 1982-03-27 | 1989-05-18 | Rohde & Schwarz GmbH & Co KG, 8000 München | System zum automatischen Aufbau einer Kurzwellen-Telegrafiezeichen-Verbindung |
US4485477A (en) * | 1982-07-19 | 1984-11-27 | Rca Corporation | Fast frequency/code search |
IL68987A (en) * | 1982-08-03 | 1986-12-31 | Motorola Inc | Method and apparatus for measuring the strength of a radio frequency signal |
US4475215A (en) * | 1982-10-15 | 1984-10-02 | The United States Of America As Represented By The Secretary Of The Army | Pulse interference cancelling system for spread spectrum signals utilizing active coherent detection |
US4538280A (en) * | 1983-05-05 | 1985-08-27 | E-Systems, Inc. | Coherent spread spectrum pseudonoise tracking loop |
US4599733A (en) * | 1983-09-19 | 1986-07-08 | The United States Of America As Represented By The Secretary Of The Army | Multilevel noise code mate pair generation and utilization of such codes |
US4744083A (en) * | 1984-09-14 | 1988-05-10 | Geostar Corporation | Satellite-based position determining and message transfer system with monitoring of link quality |
US4607375A (en) * | 1984-10-17 | 1986-08-19 | Itt Corporation | Covert communication system |
-
1985
- 1985-10-11 GB GB8525105A patent/GB2253971B/en not_active Expired - Lifetime
- 1985-10-17 DE DE3546469A patent/DE3546469C2/de not_active Expired - Lifetime
- 1985-10-17 NL NL8515007A patent/NL192282C/nl not_active IP Right Cessation
- 1985-10-29 CA CA000494055A patent/CA1333921C/en not_active Expired - Fee Related
- 1985-10-29 US US06/807,972 patent/US5230076A/en not_active Expired - Lifetime
- 1985-10-30 AU AU49196/85A patent/AU632279B2/en not_active Expired
-
1986
- 1986-04-24 FR FR8605979A patent/FR2714777B1/fr not_active Expired - Lifetime
- 1986-06-19 IT IT8648153A patent/IT1235572B/it active
- 1986-07-24 SE SE8603211A patent/SE469649B/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
IT8648153A0 (it) | 1986-06-19 |
NL8515007A (nl) | 1992-10-01 |
CA1333921C (en) | 1995-01-10 |
FR2714777A1 (fr) | 1995-07-07 |
GB2253971B (en) | 1993-02-03 |
US5230076A (en) | 1993-07-20 |
DE3546469A1 (de) | 1993-07-29 |
SE469649B (sv) | 1993-08-09 |
NL192282C (nl) | 1997-04-03 |
AU632279B2 (en) | 1992-12-24 |
FR2714777B1 (fr) | 1996-04-26 |
GB2253971A (en) | 1992-09-23 |
DE3546469C2 (de) | 1994-09-08 |
SE8603211D0 (sv) | 1986-07-24 |
NL192282B (nl) | 1996-12-02 |
SE8603211L (sv) | 1992-11-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950929 |