Detection Project: Radio Directional Finding Passive Pan and Tilt System



Here are the comments I made and figure I can note here also:

Neat and great detail as always with your works. I finally have a direct TV dish and some other antennas I've picked up for free to use for. I'd like to use one antenna for a background scan (discone most likely) to subtract to reduce noise/unwanted signals and the other antennas for tracking.

I've considered for the altitude/tilt tracking using a semi-circle, or actually might be a little more of a circumference, gear with the axis as close to the back of the parabolic trough or dish as you can so less counterweight required and is more the center of gravity. Kind of built right into the back side of the dish/trough basically. Then having the table rotate for panning maybe using captain chair bearings that can be found cheap like at Walmart in the marine section with the whole system kind of built like the Dobsonian mounts. This instructable kind of has the idea (https://www.instructables.com/id/BUILDING-a-DOBSONIAN-TELESCOPE-MOUNT/)... though not like I'm planning exactly.

I've been wondering how to make DIY like video camera mount pan and tilt fluid bearings since seems like would be way smoother. I'm thinking something pressurized with grease or more grease for now with a seal around for the panning captain chair bearing at least.

Here's a closer design regarding the mount where a layer for gear teeth can be added: https://makezine.com/projects/build-a-backyard-dobsonian-telescope/

Here is an even closer design... with the exception that I am thinking for fluid bearings milling a groove in the base for the balls and grease to be with a similar though slightly narrower profile for the top part that will sit on the balls and in between the base groove. I'm thinking the same for the altitude/tilt tracking with brushes/rubber to clean or like squeegee the top part before entering the end bottom part that has the profile of the bearing to keep the bearings in. http://members.ziggo.nl/jhm.vangastel/Astronomy/30cmscope/motorize_30cm.htm

I'll document this here also for the record since is interesting to me, though not sure about heavier systems even if designed like I noted above... though does seem really simple in design: https://garyseronik.com/a-tracking-platform-for-astrophotography/#more-52

Here is a potential COTS hackable system for detecting and correlating perimeter signals targeting us with our human body resonance EEG, EMG and/or ECG signals for around ~$35 (think about other polygraph exam like signals that could also be detected and correlated too):
https://www.youtube.com/watch?v=c2DPY-ODUmI&feature=youtu.be
https://hackaday.com/2018/08/30/turning-a-fitness-tracker-into-an-eeg/#comment-4954656


Here is the link also to the compilation of files regarding the system research so far: https://drive.google.com/open?id=0B3kLL6AnKjj5UVpxU1QxNjNUcW8

Comments

  1. JamesAugust 16, 2018 at 10:35 PM

    Facebook related post

    ReplyDelete
  2. JamesAugust 19, 2018 at 2:34 PM

    I'm going to put this Kytoon link here also for inspiration to detect or even potentially be used for subtraction of background signals in the air: https://en.wikipedia.org/wiki/Kytoon

    ReplyDelete
  3. JamesSeptember 12, 2018 at 7:05 PM

    Figured I'd add a comment on this blog post and start a new one for this month regarding Web SDR's for radio direction finding as well as some RTL-SDR or other Radio Direction Finding links:
    https://skywavelinux.com/best-sdrservers.html
    https://hackaday.com/2018/09/10/direction-finding-and-passive-radar-with-rtl-sdr/
    https://www.rtl-sdr.com/building-an-rf-direction-finding-robot-with-an-rtl-sdr/
    https://www.rtl-sdr.com/tag/radio-direction-finding/

    ReplyDelete
  4. JamesSeptember 20, 2018 at 2:10 PM

    Updated the Generic RTL-SDR Procedure: http://dewdetectionprojects.blogspot.com/2017/11/generic-procedure-for-installation-of.html

    ReplyDelete
  5. JamesOctober 14, 2018 at 9:08 AM

    I need to create a new monthly entry, though am dropping this links here for now:

    https://hackaday.com/2018/10/12/drone-ground-penetrating-radar-mine-detector/
    https://hackaday.com/2018/10/13/tiny-telescope-for-simple-radio-astronomy/

    ReplyDelete
    Replies
    1. JamesOctober 14, 2018 at 9:10 AM

      https://www.linkedin.com/pulse/directed-energy-weapon-detection-system-less-than-50-james-finch/?published=t

      https://www.instructables.com/id/How-to-Make-a-Directed-Energy-Weapon-Detection-Sys/

      Delete
    2. JamesOctober 14, 2018 at 12:37 PM

      http://www.ok2kkw.com/eme1960/w1tqz1961eng.htm

      Delete

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