# New GR Tutorials Posted **URL:** \ **Category:** GNU Radio\ **Created:** [August 11, 2014, 9:40pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494 "2014-08-11T21:40:00Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [August 11, 2014, 9:40pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/1 "2014-08-11T21:40:00Z")
Hi everyone, I would like to invite you all to check out and beta test our new GNU Radio Tutorials: [http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided\_Tutorials](http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials) This was a good community effort to put this together, and I know that I can rely on this community to now go and take them apart! Thanks especially to: - Ben H. - Martin B. - Marcus Mueller\* - Ankit Kaushik - Alfredo M.\* - A special thanks for helping out even with your GSoC projects going this summer. Hope some of you find this useful! Tom ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 1:11am UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/2 "2014-08-12T01:11:38Z")
I stumbled upon these a couple weeks ago; they look really good! If we find any needed corrections, do we post them to this thread? Thanks, Lou KD4HSO Tom R.-2 wrote > Hi everyone, > > I would like to invite you all to check out and beta test our new GNU > Radio > Tutorials: > > [http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided\_Tutorials](http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials) – View this message in context: [http://gnuradio.4.n7.nabble.com/New-GR-Tutorials-Posted-tp49912p49915.html](http://gnuradio.4.n7.nabble.com/New-GR-Tutorials-Posted-tp49912p49915.html) Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 12:34am UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/3 "2014-08-12T00:34:06Z")
Very nice, thanks for the heads-up. Doc Sent from my iPad ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 8:34am UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/4 "2014-08-12T08:34:56Z")
There’s no indications of who authored the material? ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 1:27am UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/5 "2014-08-12T01:27:07Z")
On Mon, Aug 11, 2014 at 7:10 PM, madengr [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I stumbled upon these a couple weeks ago; they look really good! If we > find > any needed corrections, do we post them to this thread? > > Thanks, > Lou > KD4HSO Well, you had to be clever and jump ahead of the rest of the class! I moved the page names and added a front page that’s linked below. On there you’ll see to send all feedback and bug reports to [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid). Tom ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 1:43pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/6 "2014-08-12T13:43:11Z")
I am completing a summary of this summer’s experiments including - decoding weather satellite and the opportunity to introduce channelized decoding (Frequency Xlating FIR Filter) - since satellites are not often visible at my latitude, application to POCSAG which is easier to grab, and most significantly using the pipe output to another decoding program as shown on YouTube by A. Csete, - understanding the processing load of the firdes tap generating function and comparison of the generated FIR coefficients with those provided by GNU/Octave (firls function), - comparison of the sensitivity of the various DVB-T receivers (at the moment still quite qualitative – I should find a protocol to quantify this sensitivity in the lab – any advice would be welcome). This is all on the receiver side, no transmission/signal generation other than simulation using the noise source. At the moment the draft is still in French (if any French speaking audience wants to have a quick look: [jmfriedt.free.fr/sdr2.pdf](http://jmfriedt.free.fr/sdr2.pdf)). This is still ongoing work targeted to be completed by beginning of October, by which time I’ll have translated it to English. JM ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 4:05pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/7 "2014-08-12T16:05:40Z")
On Tue, Aug 12, 2014 at 9:36 AM, Martin B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > On 12.08.2014 08:33, Vanush V. wrote: > > > There’s no indications of who authored the material? > > Not in the tutorials themselves. See Tom’s OP for a list of authors. > > M Also, the wiki keeps a history of who’s edited what. Tom ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 3:38pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/8 "2014-08-12T15:38:14Z")
On 12.08.2014 08:33, Vanush V. wrote: > There’s no indications of who authored the material? Not in the tutorials themselves. See Tom’s OP for a list of authors. M ---
**Author:** ![tomrobinson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/d78d45/32.png) [@tomrobinson](https://www.ruby-forum.com/u/tomrobinson)\ **Post date:** [August 12, 2014, 11:31pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494/9 "2014-08-12T23:31:51Z")
On 12/08/14 12:41, jmfriedt wrote: > I am completing a summary of this summer’s experiments including > > - decoding weather satellite and the opportunity to introduce > channelized decoding (Frequency Xlating FIR Filter) I guess you mean the NOAA POES Fleet, transmitting APT on around 137MHz ? Or are you up on 1691 MHz ? I am also experimenting with decoding NOAA WX satellites at the moment. Flowgraph (some of which borrowed from the afore-mentioned OZ9AEC) and some raw and processed pictures are at [Index of /POES](http://hal.g7iii.net/POES/) Filenames have the format: SC\_RAW\_DDMMHHmm.jpg - Raw Files received off air. RF Front-end is gnuradio SC\_MCIR\_DDMMHHmm.jpg - MCIR Fake Colour Images SC\_NOIR\_DDMMHHmm.jpg - Infrared Colour enhancement Images (Shows strong rain storms rather well sometimes) Where SC will be NOAA15, NOAA18, NOAA19 as appropriate, and DDMMHHmm is the time/date of the pass, UTC. I also have a modified flowgraph that resamples to 11025kHz, and sends that to an alsa loopback device, to which wxtoimg is connected on the other end. That’s actually how most of the pictures are created. While the output from gnuradio is fine (although I have not done a back-to-back comparison yet), If you feed wxtoimg a raw image from Alex’s/Mine flowgraph, it can’t tell when the pass was, or which spacecraft, so can’t work out where to draw the map. Most annoying that it doesn’t let you _tell_ it where the s/c was 🙂 Next pass I downlink, I’ll remember to keep the poes.dat output file, and run that back to back test… Antenna system is a double turnstile at ~12 ft, no preamp, Funcube Dongle Pro Plus, fed into Gnuradio. I must try the USRP and compare! For those interested, some of the images are of the remnants of Hurricane Bertha, after she had passed my location. Height of the Antenna for those was only 7 ft, due to expected high winds (Antenna is only mounted temporarily on a carbon fibre fishing pole!) Iain