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  • Raspberry Pi NOAA Weather Satellite Receiver

    Hello Phil. I was curious if you were able to make modification to the script that produced the text overlay on the image. I see those options in the WXTOIMG manual but have never been able to make them work. Did you do this in the raspberry pi or pull the WAV files to a professional version on another computer? Perhaps there is something I need to activate on the RPI to make this work? Appreciate any info you might be willing to share.

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  • Ultralight Kayak - Middle School Project

    This is a great instructable. My son and I have constructed 2 kayaks using other methods but we are moving on to build two using these instructions this summer. I'm curious about one part of the process. You indicated using spar varnish to coat the skin. How has that held up thus far? Would you still recommend this or would you perhaps change to a resin coating? Spar is much cheaper but it does indicate it is not for use below water line (not that this has stopped me before on other kayaks :) )

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  • Raspberry Pi NOAA Weather Satellite Receiver

    Here is something that might also be of interest to you. https://www.reddit.com/r/RTLSDR/comments/5iuzbl/fully_automated_raspberry_pi_noaa_satellite/ This link has some details about setting up a receiver. The part I used is a setup to automatically upload the images from the rPi to a dropbox location. It takes a bit to get it setup but once it is going it is a nice feature. I have mine running this way and it now sends my files up to the dropbox automatically so they are stored there. I can now see them from any location and I can just delete the images that are not good. It also avoids filling up the space on the rPi when I am not home to clean off the files.

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  • Raspberry Pi NOAA Weather Satellite Receiver

    I added this to the script titled 'receive_and_process_satellite.sh'. I added it to the very end after the last line of code.# Delete Map Files, wav files and move images to foldercd /home/pi/weatherrm *-map.pngrm *.wavmv *.png /home/pi/weather/imagescd ~Basically it will first change directory (CD) to the home/pi/weather directory. Next it will remove (rm) all files with -map.png in the file name. next it removes the wav files. Finally I created a separate folder to hold the images within the weather folder. the next line moves(mv) the remaining .png files to that folder. Finally the last line just moves back to the home directory. This step may not be necessary. Basically if you do everything except the last 2 lines it should only leave your processed images in the we...

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    I added this to the script titled 'receive_and_process_satellite.sh'. I added it to the very end after the last line of code.# Delete Map Files, wav files and move images to foldercd /home/pi/weatherrm *-map.pngrm *.wavmv *.png /home/pi/weather/imagescd ~Basically it will first change directory (CD) to the home/pi/weather directory. Next it will remove (rm) all files with -map.png in the file name. next it removes the wav files. Finally I created a separate folder to hold the images within the weather folder. the next line moves(mv) the remaining .png files to that folder. Finally the last line just moves back to the home directory. This step may not be necessary. Basically if you do everything except the last 2 lines it should only leave your processed images in the weather folder. Sometimes if I want to keep the wav files, I place a # in front of the line with 'rm *.wav' and this will leave them for me to download and review as needed. Hopefully this will help.MB

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  • Raspberry Pi NOAA Weather Satellite Receiver

    I had similar challenges the first time I set this up. I was using Rpi2 at the time. I tried a few settings as you have and at one point was successful in adding the -M wbfm setting to the line in the script. At one point, however I started over with a clean image and walked through the setup just as shown in the video. I was able to run the script just as written. I believe the first time I tried this I had made a mistake in a script. My images from the initial setup are in the comments below. Now I'm running this on Rpi3 exactly as the scripts are written. The only change is that I added extra lines to process color images and I wrote in commands to delete map and wav files once processing is complete. Everything works perfectly and I have captured hundreds of images.

    I left out one more detail. In the script schedule_satellite I also changed the max elevation to a higher number. ( if [ $MAXELEV -gt 19 ) I changed the 19 to 29 so I will only get a pass above 30 degrees. You can even make this a higher number such as 44 and you will get only a pass that has a max elevation of 45 degrees or higher. For me this helped as my antenna is inside my roof and the lower passes would not work. Anything above 30 Degrees seems to work fairly well.

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  • Raspberry Pi NOAA Weather Satellite Receiver

    My son and I built the QFH antenna and then followed this process to get the rPi up and running. I did have to make a few tweaks to the way the audio was being captured. I assume this was due to the fact that my SDR was different. We used an rPi model 2 and once it was up and running we did not notice any issues. I'm working on moving this over to the latest model to see if there is any difference. I believe most of the challenge is just getting a solid audio signal during the pass. Thanks for posting this as it was a great home school science project for my son and I to work through together.

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  • Raspberry Pi NOAA Weather Satellite Receiver

    Here is the location to view received files. Check the ~/weather directory for your results. Each pass will generate three files:NOAA1820170105-181147-map.png <-- Map overlay fileNOAA1820170105-181147.png <-- The final image fileNOAA1820170105-181147.wav <-- The raw audio file

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  • Raspberry Pi NOAA Weather Satellite Receiver

    I built this and seem to be experiencing the same issues. All my files are either completely white or completely black. I did find what appeared to be a mistake in the schedule_all.sh script. The listed frequency was 137.6200 but when I look at GPredict it shows 137.500. I have updated my script with that information. Since I live in a populated area, I updated my script to only schedule passes above 40 degrees. I manually watched a pass on my laptop last night that was over 50 degrees and I had a strong and defined signal. Unfortunately the rPi was not connected for that pass. I caught 3 more overnight and all were blank. If you have learned anything that might help I'm interested. Running Rpi 2, Nooelec SDR dongle, and a QFH antenna located in my attic. I'm no...

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    I built this and seem to be experiencing the same issues. All my files are either completely white or completely black. I did find what appeared to be a mistake in the schedule_all.sh script. The listed frequency was 137.6200 but when I look at GPredict it shows 137.500. I have updated my script with that information. Since I live in a populated area, I updated my script to only schedule passes above 40 degrees. I manually watched a pass on my laptop last night that was over 50 degrees and I had a strong and defined signal. Unfortunately the rPi was not connected for that pass. I caught 3 more overnight and all were blank. If you have learned anything that might help I'm interested. Running Rpi 2, Nooelec SDR dongle, and a QFH antenna located in my attic. I'm not sure if the Rpi 2 is just not able to process fast enough for this purpose.

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