Re: [Discuss-gnuradio] X-Ray flare observations with Gnu Radio software
On 09/24/2011 08:14 PM, Pace VanDevender wrote: Marcus, this is amazing data. What frequencies are in your VLF band? Pace That particular trace was at 24KHz--looking at the NAA station in Cutler, Maine. Here is the data for NML, at 25.2Khz, located in LaMour, North Dakota: You can see that the response is absorptive, rather than reflective, and less intense, along this very-much-longer path between my receiver and the transmitter in North Dakota. In particular, the M7 at 15:20 UTC isn't even visible in this data, because the Sun angle at the transmitter site was probably "all wrong" to get a strong response at that time of day. I monitor several different frequencies, and submit data to the Stanford SID data center every day. With my 96KHz sound card, and loop antenna, I can "see" from a few hundred Hz to around 45KHz or so. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] X-Ray flare observations with Gnu Radio software
On 24/09/11 05:33 PM, Nick Foster wrote: > Marcus, > > Very cool stuff! Can I ask about the hardware you're using with SIDsuite? > > --n > Highly sophisticated, top-secret alien-inspired technology :-) Actually, a 1.5M wide square-loop antenna, with about 80M of 22ga wire on it. Feeding a Behringer Mini-MIC microphone preamplifier, then into my 96KHz sound card. http://www.behringer.com/EN/Products/MIC800.aspx -- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] X-Ray flare observations with Gnu Radio software
Marcus, Very cool stuff! Can I ask about the hardware you're using with SIDsuite? --n On Sat, Sep 24, 2011 at 2:06 PM, Marcus D. Leech wrote: > ** > Some of you know that among my various activities involving the application > of radio to space science, I operate a VLF receiver, called > SIDsuite, that is a Gnu Radio based application. > > Today, sunspot group 1302 has been putting on a great show, and I wanted to > share the plot of one of the VLF paths I monitor, which is > strongly affected by solar X-Ray flare activity, due to X-Ray flux > changing the refractive index of the ionosphere. > > [image: Sunspot group 1302: a party animal] > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > <>___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] X-Ray flare observations with Gnu Radio software
Some of you know that among my various activities involving the application of radio to space science, I operate a VLF receiver, called SIDsuite, that is a Gnu Radio based application. Today, sunspot group 1302 has been putting on a great show, and I wanted to share the plot of one of the VLF paths I monitor, which is strongly affected by solar X-Ray flare activity, due to X-Ray flux changing the refractive index of the ionosphere. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GNU Radio Release 3.4.1 available
http://gnuradio.org/redmine/projects/gnuradio/wiki/Download Annotated log from v3.4.0: v3.4.1 Achilleas Anastasopoulos (9): Moved grc files from grc/block to gr-trellis/grc updated Makefile.am and block_tree.xml to reflect changes in added grc directory in gr-trellis Added SCCC encoder/decoder grc blocksi and examples. Also moved all grc blocks related to trellis inside the gr-trellis/grc directory Added more turbo encoder/decoder blocks and examples. More examples and turbo decoder blocks added. Added pccc combined turbo decoder and corresponding GRC block Minor fixes in turbo GRC blocks and one more example added. Minor fixes in turbo GRC blocks Alexandru Csete (1): gnuradio-core: add accessors for gain property of quadrature_demod_cf Eric Blossom (2): Update details on Bdale's existing USB PID allocation. Allocate 10 additional USB PIDs to Bdale. Johannes Schmitz (1): gnuradio-core: make accessor const in gr_single_pole_iir Johnathan Corgan (22): Update revision to 3.4.1git gnuradio-core: use common coding style for accessor in quadrature_demod_cf Merge branch 'quad_demod_gain_accessors' Merge branch 'single_pole_iir_const' Fix URL in ChangeLog Merge branch 'maint' gr-utils: move non-GUI apps using old libusrp(2) into gr-usrp or gr-usrp2 gnuradio-examples, gr-audio: moved audio Python and C++ examples into gr-audio Merge branch 'maint' Merged jblum/new_volk into master Merge remote branch 'nick/volk_cmake' gr-usrp: fix missing Makefile.am entry Merge branch 'maint' comedi: fix to use comedi 0.8 API gr-uhd: post received async messages to user supplied msg queue Revert "gr-uhd: post received async messages to user supplied msg queue" Merge remote branch 'ttsou/async' comedi: fix to use comedi 0.8 API Merge branch 'maint' gr-noaa: fix PLL to generate output, then update error Merge branch 'maint' Update revision to 3.4.1 release Josh Blum (30): volk: updated lib and include .gitignores for in-tree build volk: added attributes header (copied from gruel) volk: replace references to __attribute__((aligned... with cross platform macro volk: added VOLK_API macro to external symbols volk: removed cppunit from the build (not used anymore) volk: reorganization of generation sources and generated files gnuradio: support out-of-tree bootstrap volk: make volk_machines.cc c-safe volk: make volk_machine_xxx.cc c-safe volk: removed volk_registry.h, it was superseded by the machines volk: top-level common header cleanup volk: various backports from MSVC building gnuradio: revert bootstrap changes volk: implement type-agnostic operators for volk_complex volk: generate two machine structs which are conditional on LV_HAVE_ORC volk: cmake support for volk (gcc + msvc) volk: added orc support to the cmake build volk: move generation rules into lib + cleanup Merge branch 'volk_cmake' of github.com:bistromath/gnuradio into new_volk_cmake volk: added header implementation files to generation rule dependencies volk: do not install library-only headers uhd: simplify the work function, added TODOs for tags grc: qtgui windows have scrollbars (thanks jason) uhd: added per motherboard reference source option (includes mimo cable) Merge branch 'uhd/per_mb_ref_source' of gnuradio.org:jblum uhd: typo fix for initing a new clock_config() gr: added to the .gitignores to various components for in-tree builds core: added missing config.h includes on cc files core: added missing io.h includes on cc files grc: one line fix to fix port duplicator when removing ports Matt Ettus (2): logpwrfft.py -- need to average the square, not square the average. Then do proper scaling (no more 3dB kludge). logpwrfft.py -- need to average the square, not square the average. Then do proper scaling (no more 3dB kludge). Michael Dickens (1): gr-audio: fix missing Makefile.am clause Moritz Fischer (1): volk: fix whitespace in Python script Nick Foster (56): cpuid: No more compile-time CPU checks. Compiles everything that gcc allows. comments Removed some mktables stuff since it's passe Moved the fn indices gen from volk.c to volk_registry.h so the qa code has access to the static stuff Revert "Removed some mktables stuff since it's passe" reverted mktables deletion until i get my act together and make it go straight from python -> .h volk: temporarily removed avx arch. take libvolk_runtime out of the testqa linkage Volk_runtime now does self-initialization. You can call volk_xxx_a16() just like in volk.c. Fixed mktables for the old non-runtime volk. Volk: first steps to conditional compilation/multiple obj files. Interim commit. Merge branch 'mas
Re: [Discuss-gnuradio] not receiving sound on fm receiver
On 24/09/11 03:56 AM, Antonio Cassidy wrote:
> On 24 Sep 2011, at 06:35, ahmad wrote:
>
> I spent pretty much all day yesterday trying to tune FM on an N210, I
> get peaks where I'm expecting stations but just silence.
>
> Have you tried setting the gain value higher also what antenna are you using?
>
> Nino
>
>
>
Probably a signal magnitude issue then. Don't forget that UHD scales
everything into
{-1.0,1.0}. If you've adapted some of the "classic" examples to UHD,
you may need to
put a multiplier block right after the UHD source.
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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[Discuss-gnuradio] gr-atsc module transmit questions
Hi, I am relatively new to gnuradio block-level development and am working with the gr-atsc module. I am specifically interested in the transmit portion and have a few [likely elementary] questions: 1) From what I can see the transmit functionality is only implemented up to the atsc_field_sync_mux(), I don't see the symbol mapping or VSB modulation though I have read a few other posts that suggest it is there. The gnuradio 0.9 has GrAtscWeaverModHead and GrAtscWeaverModTail header files but maybe these did not get modified into gr 3.x. 2) The atsc_field_sync_mux block is derived from gr_sync_block however it outputs more data fields than it consumes (by a factor of 313/312). Even though this seems to work, for my own benefit I re-did this as a gr_block but I am not sure if that is necessary; could someone shed some light on why gr_sync_block works (or appears to but doesn't)? Thanks for your time, JJ ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
