Questions tagged [radio]
The radio tag has no usage guidance.
12
questions
3
votes
1answer
92 views
Current delay for radio signals from the Mars InSight mission
I've been meaning to post it on the day when InSight landed but just got around to it now.
When they broadcasted landing in real-time, it really wasn't in real-time because radio signals from Mars ...
1
vote
0answers
41 views
radio Jove pcb manufacturing file
Hello I want to make the radio Jove receiver whose design is available on NASA website. I don't want to purchase the receiver. I want to make it. but I don't have any knowledge about pcb design for ...
4
votes
0answers
106 views
What EM spectrum can stars be most cheaply observed using Remote Sensing during the day?
I would like to augment my GPS navigation with remote sensing of 'the sky.' I am looking for any astronomical body that can be perceived during the day.
Maybe Pulsars emit something easily detected, ...
6
votes
1answer
127 views
What explains this puzzling radio signature from a fireball?
September 21, 2017 a bright fireball over Holland was reported by hundreds of people. Several all-sky cameras recorded it as well as a special radio beacon set up to capture radio signatures of ...
2
votes
2answers
319 views
How to calculate the integrated source flux density of a continuous source?
I'm working with data from radio surveys. My images are .fits files with BUNIT Jy/beam. I want to calculate the net flux from a continuous source (not point source). When I simply added all the ...
3
votes
0answers
324 views
Radiometer Equation for Flux Density
In Duncan and Lorimer's Handbook of Pulsar Astronomy, the equation for the flux density using a radio telescope is given as (for a top-hat function):
$$S=\frac{\beta\,\mathrm{SNR}\, T_{sys}}{G\sqrt{...
2
votes
1answer
1k views
Why levels of radio contours maps are given in mJy/beam and what does it mean?
I know what a jansky is, but I don't understand what beam (in $\frac{1 Jy}{beam}$) is.
If jansky is a unit of flux density, what kind of unit is $\frac{1 Jy}{beam}$?
2
votes
2answers
113 views
How do astronomers at SETI know if they received intelligent radio signals from other planets?
Do they expect to see wave modulations like the ones we use in our technology? what do they expect the waves to be like exactly?
1
vote
0answers
44 views
Detecting people on Proxima Cen b [duplicate]
Recently the news announced the discovery of a planet with characteristics similar in size to earth with the possibility for liquid water, 4.2 light years away.
Now, if there was a civilisation of ...
2
votes
0answers
35 views
When does oscillation of interplanetary plasma occurs?
When does oscillation of interplanetary plasma occur?
When and what are the reasons of the excitation of this plasma that makes it oscillate? Does it oscillate when is not excited?
Can extremely ...
2
votes
1answer
298 views
Need help with the math in Python program to flag Jovian radio emissions
A few days ago I decided to take on the little project of converting a Qbasic program into Python (as a side project to my Radio Jove project), and I've managed to get it to run, but the math is ...
-6
votes
2answers
234 views
Why does the Southern hemisphere seem to be short of radio telescopes? [closed]
In northern hemisphere, we have GBT, Arecibo, Parkes, Jodrell and VLA, while
in southern hemisphere, only Australia has big radio telescopes.
ALMA is in Chile, but it is in sub-mm.
Is not ...
