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Natural Science Forum / Physics / General Physics / August 2007What is the highest radio frequency used for astronomy?
Hi: What is the highest radio frequency used for astronomy? According to the link below, it is 3438 GHz: http://books.nap.edu/openbook.php?record_id=11719&page=11 Is 3438 GHz the highest radio frequency used for astronomy? Thanks, Radium In sci.physics Radium <glucegen1@gmail.com> wrote yet again: <snip> How many times are you going to post this?  SignatureJim Pennino Remove .spam.sux to reply. On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: > How many times are you going to post this? What is the highest radio frequency used for radio astronomy? In sci.physics.electromag Radium <glucegen1@gmail.com> wrote: > On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: > > How many times are you going to post this? > What is the highest radio frequency used for radio astronomy? Already asked and answered several times. How many times are you going to post this? SignatureJim Pennino Remove .spam.sux to reply. > On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: > > > How many times are you going to post this? > > What is the highest radio frequency used for radio astronomy? What is the highest frequency radiation that is considered radio waves? >>On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: >> [quoted text clipped - 3 lines] > > What is the highest frequency radiation that is considered radio waves? Have you not read the 'opinion'? Radium is a troller. You are feeding the troll. Good luck with your catch......... >>>On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: >>> [quoted text clipped - 6 lines] > Have you not read the 'opinion'? Radium is a troller. You are feeding the > troll. Good luck with your catch......... OK.. I guess I'm a 'newbie' on this subject. What is the 'opinion?' And what is a 'troll,' -- other than the creature that lives under the bridge and was dumped in the water by Billygoat Gruff? Bill . | OK.. I guess I'm a 'newbie' on this subject. What is the 'opinion?' | And what is a 'troll,' -- other than the creature that lives under | the bridge and was dumped in the water by Billygoat Gruff? In usenet speak, a "troll" is someone who posts solely for the purpose of getting attention (any kind of attention - to them, praise is best but abuse will do). They'll usually go elsewhere if ignored. -- Morris Dovey DeSoto Solar DeSoto, Iowa USA http://www.iedu.com/DeSoto/ >>>>On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: >>>> [quoted text clipped - 8 lines] > > OK.. I guess I'm a 'newbie' on this subject. What is the 'opinion?' http://www.ivoa.net/internal/IVOA/IvoaUCD/NoteEMSpectrum-20040520.html And what > is a 'troll,' http://en.wikipedia.org/wiki/Internet_troll > http://www.ivoa.net/internal/IVOA/IvoaUCD/NoteEMSpectrum-20040520.html Can millimetric-frequency receivers be used on a space station to detect signals emitted by extremely-distant cosmic object -- e.g. magnetars? > > On Aug 30, 3:05 pm, j...@specsol.spam.sux.com wrote: > [quoted text clipped - 3 lines] > > What is the highest frequency radiation that is considered radio waves? I think there are practical considerations that restrict radio astronomy, such as commercial satellite transmitters. http://www.nrao.edu/whatisra/images/spillover3.jpg >From the hardware standpoint, I think the ability to do "radio" astronomy depends on your ability to do coherent integration of energy, i.e., use both amplitude and phase information. And as the link posted by radium in his first post says: ", blurring the distinction between radio astronomy and infrared astronomy. With the advent of Earth-to-space telecommunications near 1 ?m wavelength (300 THz) and the need to regulate for avoiding interference with optical observatories, the distinction between different kinds of astronomy will eventually vanish from the regulatory perspective." In other words, he already posted the answer to his question: we haven't seen the upper limit yet, if there is one. - Randy On 8/30/07 2:49 PM, in article 1188510546.291849.307630@q4g2000prc.googlegroups.com, "Radium" <glucegen1@gmail.com> wrote: > Hi: > [quoted text clipped - 9 lines] > > Radium Do you measure height from the Earth's surface or from the Earth' center? SignatureThe PC conservative does not believe in evolution but likes to see natural selection proceed. The PC liberal believes in evolution but will do almost anything to prevent natural selection from working. > On 8/30/07 2:49 PM, in article > 1188510546.291849.307630@q4g2000prc.googlegroups.com, "Radium" [quoted text clipped - 3 lines] >> > Do you measure height from the Earth's surface or from the Earth' center? Are you feeding the troll?????????? On 8/30/07 11:20 PM, in article AqOBi.15151$B25.9211@news01.roc.ny, "Dan Bloomquist" <public21@lakeweb.com> wrote: > Are you feeding the troll?????????? I guess so. I am trying to figure out how to poison the food. Bill SignatureThe PC conservative does not believe in evolution but likes to see natural selection proceed. The PC liberal believes in evolution but will do almost anything to prevent natural selection from working. |
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