Talk:Communications satellite
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Perhaps it would be better to not imply that fiber optic communications do not experience a path delay. A common lab experiment for university students is to calculate the speed of light by measuring the path delay through length of fiber optic cable.
--Guggemos 00:26, 8 Dec 2004 (UTC)
Hermann Noordung's famous 1929 book, "Das Problem der Befahrung des Weltraums", in which he first proposed communications satellites in geostationary orbit, was re-published in facsimile in 1993 by Verlag Turia & Kant of Vienna, ISBN 3-85132-060-3.
The opening for this article states that modern comm satellites are in geosynchronous orbits. The Telephony section describes the satellites for this purpose as being in geostationary orbits. Is this accurate? --Moppet 20:14, 4 February 2006 (UTC)
I've heard roumers saying its only USA whos got communications satellites in the space, or that they control all of them. And it has been used in the war too confuse enemies. Is that right? - 82.194.200.113 08:22, 3 August 2007 (UTC)
Contents |
[edit] Major Changes
I've already made major changes to the article and am considering adding a section on spacecraft design (subsystems, equipments, etc.)
Opinions? --Philopedia 7 July 2005 17:33 (UTC)
[edit] Removal of Section
I am removing the latest addition ('Extraterrestrial communication satellite'). Although such satellites do indeed transmit results of various scientific results back to earth, this is still a departure from the generally accepted notion of what is meant by a communication satellite.
In fact, every active spacecraft communicates, if only to report on their own health and status. The term communications satellite is used in a narrower sense to denote generally commercial or military applications designed to support either broad information desimination (e.g. TV transmission) or two way communication (e.g. telephony). This definition excludes applications such as weather satellites, remote sensing satellites and interplanetary missions, all of which communicate payload data to the ground.
I suggest that the author of the new section look into reintroducing the material in an article on scientific satellites.
--Philopedia 03:19, 24 July 2005 (UTC)
[edit] telephony
I do not understand the first two sentences:
sentence 1
"The first and still, arguably, most important application for communication satellites is in international satellite."
...is in international telephony? is in international satellite telephony? What goes here.
sentence 2:
"An analogous path is then followed on the downlink."
there is no reference to what the analogous path is, or the previous action that would warrant a 'then'.
[edit] Got questions...
well i dont rely understnd the article...i just wanna ask some questions for my assgnment..
has any satellite used laser communication till now? —Preceding unsigned comment added by 59.94.179.233 (talk) 07:07, August 28, 2007 (UTC)
1. What are the function of Satellite communication anyway? State atleast 4...
2. What are the transmitting and receiving frequency for satellite communication?
3. Satellite are equipped with multiple repeaters which we call relay station right?? so can u tell me more about relay station but make it simple ok...
Thank you...
[edit] Commercial Links?
In the *External Links* section on this page, and a number of other satellite-related pages, I've reverted links to www.prmt.com, similar to this one:
I've done it on the basis that the link is a commercial one and appears to me to be against WP:EL.
The links keep getting put back though, and since I don't want to appear to be undertaking a vendetta against prmt.com I'd like to take the view of other editors.
Is this link approapriate to this article, or should it be deleted on the basis of WP:EL?
MarkPos 21:23, 23 October 2007 (UTC)
