On 07/12/2020 11:38 PM, Larry Dodd wrote:
Marcus
Strictly receiving Jupiter storms and solar flares. As a Radio Jove member for
a couple years now we have recorded many Jupiter storms in the 15 to 30 MHz
range. They are generally of three types. S bursts, L bursts and N events. We
send the SDR data stream to Radio Sky Spectrograph software. The files are
archived for study by NASA scientists and other researchers. Jupiters moon Io
plays an important roll in directing these storm impulses to earth. We have
special software that predicts the probability of receiving the storms based on
Earth, Jupiter, and Io orbital positions. I can send you sample spectrograms if
desired. We also study ionospheric events, galactic background noise, and some
celestial scintillations. Yes RFI is a problem but there are software
mitigation techniques.
Larry, K4LED
Thanks, Larry.
Yes, I'm familiar with all of that. I've been doing radio astronomy on
and off since 1986, and started using SDR/Gnu Radio for it in 2004.
I did some work for Natural Resources Canada on riometers a couple of
years ago, and have been involved in riometer development with
Gnu Radio since 2010 or so.
On Jul 12, 2020, at 11:16 PM, Marcus D. Leech <patchvonbr...@gmail.com> wrote:
On 07/12/2020 10:59 PM, Larry Dodd wrote:
Marcus
Ok Thanks for the information Marcus. I have both a Spyverter and Ham-it-up
already. I may get an N210 eventually. The X series unfortunately are out of my
funding range. I appreciate your expertise and advice. Thanks!
Larry, K4LED
Incidentally, what kind of radio astronomy are you planning to do at that frequency
range? It's mostly, as you might expect, "a mess", but
some discrete frequencies are available for things like riometry, and looking
at solar and jupiter radio bursts...
On Jul 12, 2020, at 10:08 PM, Marcus D. Leech <patchvonbr...@gmail.com> wrote:
On 07/12/2020 09:42 PM, Larry Dodd wrote:
Marcus
Actually I don’t have the B210 or the LFRX yet as I just ordered them but
that’s all I ordered. Do I need to cancel the order?
Larry, K4LED
The LFRX will be of no use to you unless you have a platform that it can plug
in to.
I'd keep the B210 part of the order, and order a HamItUp or SpyVerter
upconverter module, which up-converts HF frequencies to
a higher range that the B210 can tune to.
HamiTup is sold by NooElec, and the SpyVerter is sold by
https://airspy.com/spyverter-r2/
Again, the LFRX is a "daughtercard", which is used in various USRPS that use
the daughter-card architecture, like the USRP1, USRP2,
N2xx, X3xx, B100, and E100.
But the B210 is an excellent machine, it's just that it doesn't tune down to HF
frequencies. But with the addition of a (fairly cheap, IMHO)
up-converter, you can explore the territory you're interested in quite nicely.
In terms of software, it really depends on what you want to *do*. If you just
want an integrated FFT display that can cover your 15MHz
of bandwidth, you can use the uhd_fft application, and have it sample at 15Msps--this
assumes your computer is able to "keep up"
at that rate--a good USB3 controller will be required, and a good multi-core
machine to go with it.
On Jul 12, 2020, at 8:06 PM, Marcus D Leech <patchvonbr...@gmail.com> wrote:
The B210 is self contained and tunes down to 50Mhz at the lowest. The LFRX is
for other types of USRPs. So first things first, what type of USRP do you have?
Sent from my iPhone
On Jul 12, 2020, at 7:43 PM, Larry Dodd via USRP-users
<usrp-users@lists.ettus.com> wrote:
I need to set up a GNU HF spectrum analyzer with a waterfall using my B210,
LNA, and LFRX daughter board. The target would be a 15 to 30 MHz (or wider)
instantaneous spectrum for Radio Astronomy work. Rather than re-creating
something that already exists where could I get a similar GNU flowgraph? Since
I am brand new to USRP any advice is very welcome.
Thanks,
Larry, K4LED
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