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Expert Profile: Mark C J Posen

Expertise:  I am happy to answer questions of a technical and regulatory nature in the area of satellite and radio communications. I am best able to answer questions about systems and technology and less able to respond to questions about specific hardware and equipment setup and installation, but I'm happy to try and address any question put my way. My main areas of expertise are link analysis (link budgets, performance, Eb/No, capacity), interference analysis (C/I, protection ratios, interference avoidance), spectrum management (frequency coordination, inter-system sharing), Radio Regulation (ITU, ITU-R) and satellite technologies and trends.

Experience in the area
I have worked as a satellite communications engineer at a professional level since 1983. Since 1990, as Managing Director of RPC Telecommunications Limited, I have operated a private satellite communications consultancy and have provided technical support to many satellite operators and national governments.

Organizations
IET - Institution of Engineering and Technology, IEEE - Institute of Electrical and Electronic Engineers

Education/Credentials
B.Sc. Electrical and Electronic Engineering, Bristol University, 1983, M.Sc. Satellite Communications Engineering, Surrey University, 1986

Awards and Honors
C.Eng. - Chartered Engineer registered with the Engineering Council (UK)

Ask a Question       View Past Answers       View Ratings            
What do you like about this subject?  I've been interested in radio communcations since I built my first single-diode receiver back in 1970 and fascinated by space since the Apollo program of the 1960s (watching Neil Armstrong's first steps on the Moon back in 1969). Since I was never going to be an astronaut I managed to get a job in satellite communications as the next best thing!
What do you still hope to achieve/learn in this field?  There's always something to learn! Staying ahead of the latest technologies and trends is a constant learning process.
Average Ratings
Prestige Points: 350
Knowledge   9.78   Best of the best
Clarity of Response   9.56   Best of the best
Timeliness   9.78   Best of the best
Politeness   9.89   Best of the best
Number Of Questions
(in Past 24 Hours)
0
Max Questions to be Asked
(in 24 Hour period)
2
Total Questions
(since joining AllExperts)
69
Recent Reviews from Users
KnowlClarityTimePolitenessDate
1009/04/08
10101009/03/08
1010101009/06/08
1010101009/02/08
1010101009/02/08
User Comments
Response time was fantastic and provided references as well. Impressed!
(Charles on 09/04/08)
Thanks alot for taking your time to think through the problem and offer practical solutions. Regards Ken Ndirangu
(Ken on 09/03/08)
thanx sir may u live long
(syed waqas haider on 09/06/08)
Thank you for tring so grateful. All the best Tony
(tony on 09/02/08)
Very helpful, gave me an answer clear ans straight to the point. And more important i got an answer simplified enough to be understandable but als
(jorge on 09/02/08)
View All Comments
Ask a Question       View Past Answers       View Ratings            

Recent Answers from Mark C J Posen
2008-09-26  Transponder capacity Hello, Thanks for this question. Unfortunately the situation is not as simple as you hope! There are two factors which determine the capacity of a satellite transponder, available bandwidth and...
2008-09-22  satellite Hello, Thanks for the question and sorry for the short delay in answering you. I'm sorry but what you are asking is not entirely clear to me, but I *think* you are asking where the half-second delay...
2008-09-18  Link budget OBO Hello, Thanks for the question and sorry for the short delay in answering you. You are right that the output backoff point should represent the operating point in the transponder's input/output power...
2008-09-11  Band Hello, Thanks for your question and I'm really sorry for the delay in answering. I don't have a chart which describes what you are looking for, I'm afraid. There's lots of useful data out on the...
2008-09-10  PSD Hello, Thanks for your questions: 1) Re PSD, I already answered this exact point in your previous question so I won't repeat my answer here. 2) Regarding intermodulation, in principle at least...
More Answers for "Satellite Communications"


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