Mike Dennison, Chris Lorek “Radio Communication Handbook, 8th Edition"
Amer Radio Relay League | 2005-06 | ISBN: 1905086083 | 784 pages | PDF | 63,2 MB
Many books claim to have been extensively revised however the RSGB Radio Communication Handbook, 8th edition has had the largest revision for many an edition. Once again, the RSGB has recruited experts on a wide variety of subjects to produce the most comprehensive guide to the practical side of amateur radio. Covering the entire spectrum from the basics through to advanced projects, and including many classic circuits, the Radio Communication Handbook makes an essential shack accessory.
Just about everyone will find items of great value in this great book. Chapters vary from the essentials right through to detailed ones on specialist topics. For the experienced radio amateur there are hosts of new ideas, including modern techniques such as microprocessors, surface mount components and computer aids to designing circuits and antennas. The book also contains for the first time since the original 20-part RadCom serial the 'PIC-A-STAR' brainchild of Peter Rhodes, G3XJP. This is a complete transceiver project, based around PIC technology and giving state-of-the-art performance. Appendices contain all the useful reference data and artwork for printed circuit boards. With 26 chapters spread over 768 pages this is packed with far more ever than can be detailed here.
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O. V. Verkhodanov, Yu. N. Parijskij
Radiogalaktigi i kosmologia
(Radio galaxies and cosmology [in Russian])
The book is devoted to investigations of powerful radio galaxies in the different wavelength ranges. The main accent is done on the observational data and their interpretation. The history of study for radio galaxies is given and the outlook on radio galaxy exploring is considered. The properties of these objects are described as well as the modern physical models of their activity and difference. We also describe results of investigation of radio galaxies in the "Big Trio" project carried out with the radio telescope RATAN-600, 6-m optical telescope (BTA) of Special astrophysical observatory and the radio interferometer VLA (NRAO, USA). The cosmological tests to check the Universe evolution parameters constructed on the observational data of radio galaxies are considered in details. We describe problems of analysis of the cosmic microwave data when the background noise is due to the confusion of the radio galaxy distribution.
This book is for students and specialists in astrophysics and for those who are just interesting in the modern astrophysics and cosmology.
List of detected misprints (in Russian).
Industries: Radio Personality type: Creative Departments: ProgrammingThe lowdown
To do this role, you will need to:
Programme Controllers or Programme Directors lead programming teams on commercial radio stations, ensuring that they produce programming which meets the creative and commercial needs of each station.
They oversee the work of the programming teams and work closely with the Station Manager who has overall responsibility for the station, but whose focus is on sales and maximising revenue.
In the BBC, the closest equivalent may be an Assistant Editor in local radio. The BBC also uses the title Controller for the head of each of its national radio networks, but that is not the job being referred to here.
Programme Controllers recruit, train and develop their teams, and undertake day-to-day management of all staff in the programming departments, encouraging creativity and commercial awareness.
They work collaboratively across their organisations and contribute to the development of multiplatform content. They must continually review and refresh programme output, and devise new programming to attract and retain audiences, and to contribute to the station’s success.
Along with Station Managers, they represent the station externally at a local level, building relationships within the community. They ensure that programming complies with the laws, regulations and industry codes governing radio broadcasting, and make sure that complaints are dealt with swiftly.Will I need a qualification?
You do not need a degree to be a Programme Controller. You could gain the required management skills and experience on the job in other roles, and may decide to hone these skills by undertaking a relevant management qualification.What’s the best route in?
To achieve the position of Programme Controller in commercial radio, you will need to have gained substantial experience in programming over a number of years, probably with several different stations and organisations. You will also need to have a thorough understanding of the commercial side of the business.Where might the role take me?
You could progress to a larger local station, to a regional role with one of the larger radio broadcasters or to a management role with a national service. You could also move into TV.Interested? Find out more. Websites
* Multimedia Ground & Flight Training
* Covers the JAA/EASA ATPL theoretical knowledge syllabus
* Contains over 280 ATPL examination-style questions and answers
* Your personal instructor on CD-ROM
This multimedia Computer-Based Training (CBT) course has been specifically designed for pilots wishing to study for the EASA ATPL Radio Navigation syllabus.
The subjects covered range from the fundamental first principles behind propagation, modulation and basic radar theory to full descriptions and detailed graphics of modern avionic systems such as MLS, Airborne Weather Radar, RNAV, FMS, EFIS and GPS.TABLE OF CONTENTS:
Area Navigation Systems
VOR and Doppler VOR
PC specification: Windows (XP, Vista, 7), 550 MHz CPU, 256 Mb RAM, 4x CD-ROM Drive, Windows compatible sound card, 1024 x 728 16 bit colour graphics
Recommended PC specification:
Windows XP, 1 GHz CPU, 512 Mb RAM, 12x CD-ROM Drive, Windows compatible sound card, 3D Accelerator
Delay Data and Documentation
The neutral atmosphere (mostly the troposphere in the lowest ten kilometers of the atmosphere) delays radio signals emitted by satellites, e.g. of GNSS (Global Navigation Satellite Systems), or by distant radio sources observed by VLBI (Very Long Baseline Interferometry). In recent years, data from numerical weather models (e.g. from the European Centre for Medium-Range Weather Forecasts, ECMWF) have been used to improve the accuracy of the analysis of space geodetic observations.
If done rigorously, direct ray-tracing through numerical weather models has to be carried out for every single observation — a task which might be feasible for VLBI or normal points of Satellite Laser Ranging (SLR), but not for GNSS with the huge number of stations, satellites, and observations. Alternatively, data from numerical weather models can be used to develop troposphere delay models which are based on a limited number of coefficients that hold for a certain area, time, and/or azimuth/elevation range. The latter approach reduces the number of calculations considerably, allowing to provide the coefficients globally and for the complete history of space geodetic observations.
Within project GGOS Atmosphere, we determine hydrostatic and wet zenith delays together with the coefficients of the Vienna Mapping Functions (VMF1) which map the zenith delays to lower elevation angles. These parameters are provided on a global grid (2.0° x 2.5° latitude-longitude) every six hours, which is the usual time resolution of ECMWF data, and we also determine these parameters for selected VLBI and GNSS sites.
An alternative provider of the Vienna Mapping Function 1 coefficients is the University of New Brunswick. Their coefficients based on data of the National Centers of Environmental Prediction (NCEP) and the Canadian Model (CMC) and more information on their products can be found here.
Additionally, we developed analytical backup functions, which can be used if the VMF1 or the corresponding zenith delays are not available. The Global Mapping Functions (GMF) are 'mean' Vienna Mapping Functions 1, and the Global Pressure and Temperature model (GPT) provides pressure and temperature in the vicinity of the Earth surface. Both analytical models, GMF and GPT, are spherical harmonic expansions up to degree and order nine, and both need the station coordinates and the day of the year as input parameter. The pressure from GPT can be used to determine the hydrostatic zenith delay which is then in agreement with a long term average of the hydrostatic zenith delays that are provided with the VMF1. The figure shows the excellent agreement between terrestrial reference frames determined with ECMWF/VMF1 and GPT/GMF. In 2013, an udpate to both GPT and GMF has been developed which is called GPT2 and is based on 5° as well as 1° grids and contains annual and semi-annual harmonic functions.
Residuals of the 14-parameter similarity transformation between VMF1/ECMWF and GMF/GPT terrestrial reference frames. The arrows refer to the horizontal, the color scale to the vertical residuals (from Steigenberger et al. 2009).
Additionally, we provide other parameters like the heights of the 200 hPa pressure levels, or the mean temperatures to convert wet zenith delay to precipitable water. Within a recently approved new FWF-project called 'Radiate VLBI' we do direct ray-tracing for all VLBI observations and to use those delays with our in-house Vienna VLBI Software (VieVS).References
T. Nilsson, J. Böhm, D. D. Wijaya, A. Tresch, V. Nafisi, H. Schuh. Path Delays in the Neutral Atmosphere, in J. Böhm and H. Schuh (eds): Atmospheric Effects in Space Geodesy, Springer Verlag, ISBN 978-3-642-36931-5, pp. 73-136, 2013.
K. Lagler, M. Schindelegger, J. Böhm, H. Krásná, T. Nilsson. GPT2: Empirical slant delay model for radio space geodetic techniques, Geophys. Res. Lett. Vol. 40, 1069�1073, doi:10.1002/grl.50288, 2013.
V. Nafisi, M. Madzak, J. Böhm, A. A. Ardalan, H. Schuh. Ray-traced tropospheric delays in VLBI analysis, Radio Science, Vol. 47, RS2020, doi:10.1029/2011RS004918, 2012.
J. Böhm, B. Werl, H. Schuh. Troposphere mapping functions for GPS and very long baseline interferometry from European Centre for Medium-Range Weather Forecasts operational analysis data, J. Geophys. Res. Vol. 111, B02406, doi:10.1029/2005JB003629, 2006.
Last modification: 8 August 2014
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Model Hovercraft Kits, Plans, Parts and Books
Radio Control Hovercraft
by Kevin Jackson and Mark Porter
For the first time, this comprehensive tutorial brings together all the information required to design and build a successful radio controlled Hovercraft model.
� Hovercraft principles
� Building for scale and sport
� Construction materials and techniques
� Lift fan design
� Selecting motors
� Electrical setup
� Skirt design
� Selecting radios
� Craft operation
Written by two leading authorities in RC Hovercraft design, Kevin Jackson and Mark Porter take you through both the theoretical and practical aspects of the design and construction process.
Generously illustrated with photos, 3D cutaways and diagrams, the principles are explained in theory and shown at work on real models. Setup and operation of the finished model are discussed along with some of the unique challenges of controlling the craft.
The book offers the experienced or first time modeler an opportunity to get started in the rapidly growing part of the RC hobby. Part plane and part boat, this unusual craft offers a whole new experience and this book is an ideal companion when venturing into this new field of radio control models.
Price $22.95 (Shipping within the USA $6.95 - To Europe and the UK $8.95)
Published by Flexitech LLC, 124 pages, perfect bound, ISBN 0-9753414-1-3
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This is an interesting book that describes advances in the Mobile RAN. Dr. Guo has managed to collect different topics like HSDPA, MIMO, OFDM, Mobile IP, etc in one book. One could say that this book is a collection of quick tutorials of these advanced topics. If you are looking to find minute details than this book will disappoint you but you might find some good references at the end of each chapter which might point you in the right direction.
One good thing in this book was that topics were not sort of cut and paste from the 3GPP specifications. Effort has been made to explain the specs in authors own language and in some places with the help of Message sequence chart. I found the topic of HSDPA very informative.
The flip side if you may be wondering is that since this book was published in mid 2004 (and written probably much earlier), some of the topics lack recent details. For example there is no mention of HSUPA/HSOPA at all. Similarly in the chapter of Ubiquitous Networks discussion on WiMax and Mobile WiMax is missing.
Still if you would like to learn more about advanced technologies this book will provide lot of information.
(c) 2005,2015 Peter McCollum
The AS-3 HF Radio Set
This set's nomenclature indicates that it was intended for a slightly different purpose from the "RS" sets that are more commonly seen. The "AS" stands for Automatic Station, so named because some 'automatic' features were built-in, notably burst transmission. The set uses the CO-3 coder and CA-3 cartridge, which are also seen with several other sets, including the RS-8, RS-49, RS-511, and the military AN/GRA-71 coder/burst set. It is noted that the CO/B-8 coder (which is much more complex than the CO-3, and includes an alphabetic wheel) is not mentioned with the AS-3 set. Probably the CO/B-8 was not available yet, since the AS-3 is believed to be only the second system to use high-speed keying. There are other AS-series sets, in particular the AS-4 which uses a modulation mode other than simple on-off keying.
The AS-3 was a replacement for RS-1 and RS-6 sets in the field, beginning in 1962 [ref 102].
The AS-3 uses early solid-state technology, and operates directly from 12 VDC. The transmitter includes built-in components that are generally equivalent to the KE-8 keyer (the ability to 'play' CA-3 tapes, and key the transmitter at 300 WPM). The set includes an AP-3 power supply, which accepts various AC input voltages, and produces 12 VDC. A BA-3 battery is another optional power source. The AS-3 was possibly made by Hughes Electronics.
Although the receiver can be operated independently, the AS-3 set is centered around the AT-3 transmitter. The AT-3 has connection points for the RR/D-11 receiver, and also a TP-3 printer. It is unclear what the purpose of the TP-3 printer is. Two possibilities are:
1. It is for making a printed record of a transmitted message (although this would seem to be a security risk).
2. It is for printing received signals (high-speed bursts?) in a manner that could be directly read without a tape recorder or other specialized equipment. This conjecture is possible since the printer and receiver both connect to the transmitter, so signals from the receiver could be routed to the printer. The printer would perhaps be able to detect an audio tone and use the presence/absence of the tone to produce a printed output.
The RR/D-11 receiver, part of the AS-3 set. The BNC antenna connection and RCA phono jack audio output are likely not original. This image is from the book "CIA Special Weapons & Equipment: Spy Devices of the Cold War" by H. Keith Melton, Sterling Publishing Co. NY, 1993, ISBN 0-8069-8732-4. Image used with permission.
A view of the AT-3 transmitter from the operator's manual.
Another view of the AT-3 from the manual. Note the connection points for the TP-3 printer and RR/D-11 receiver.
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