The Aurora Underground

David Hunter - Hunter Geophysics
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Unmarked grave detection, GPR-SLICE software, space weather forecasting, and camera sales

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  1. 08.03.2021 ·  Video

    SHAG after dark 2

    Join administrators of the Southern Hemisphere Aurora Group (“SHAG”) for a chat about aurora forecasting and photography. Check out the Southern Hemisphere Aurora Group on Facebook if you are interested in the Aurora Australis. If you would like to make any suggestions for future episodes of the podcast, or any constructive criticism, please send Dave an email. Special thanks to Andrew Klapton for providing the fantastic photograph of the Aurora Australis taken from a cemetery; with Andrew’s permission, we are using this photograph as the podcast’s cover image. Thanks, Andrew! The Aurora Underground podcast artwork. Photograph by Andrew Klapton. The post Episode 7: SHAG after dark 2 appeared first on Hunter Geophysics.

  2. 20.02.2021 ·  Video

    SHAG after dark 1

    Join administrators of the Southern Hemisphere Aurora Group (“SHAG”) for a test broadcast and brief chat about aurora forecasting. We didn’t really have a plan for this broadcast, so things get a bit slow at times. Our next episode will follow a plan and hopefully won’t be quite so boring… haha! Check out the Southern Hemisphere Aurora Group on Facebook if you are interested in the Aurora Australis. If you would like to make any suggestions for future episodes of the podcast, or any constructive criticism, please send Dave an email. Special thanks to Andrew Klapton for providing the fantastic photograph of the Aurora Australis taken from a cemetery; with Andrew’s permission, we are now using this photograph as the podcast’s cover image. Thanks, Andrew! The Aurora Underground podcast artwork. Photograph by Andrew Klapton. The post Episode 6: SHAG after dark 1 appeared first on Hunter Geophysics.

  3. 25.07.2019 ·  Video

    GPR-SLICE tutorial video (podcast): processing ImpulseRadar Raptor multichannel GPR data

    In this video, I process an ImpulseRadar Raptor multichannel GPR dataset. The Raptor allows you to mount multiple GPR antennas side-by-side within one antenna housing, allowing you to collect multiple lines of GPR data while only walking along one line. This video uses a dataset that does not have GPS or Total Station navigation data. However, I also explain along the way how GPS/TS users can process their data, so if you have plugged a GPS or Total Station into your Raptor system, this video should help you as well. There are a few potential issues to be aware of when using multi-channel systems such as the Raptor: We have to tell GPR-SLICE where each survey line (or swath) was located. We have to tell GPR-SLICE where each antenna/channel was located within each swath (so that GPR-SLICE can calculate the correct positions for each channel’s GPR data within the survey grid). We have to consider the possibility of different GPR antennas within the multichannel array having differing levels of sensitivity to the reflected GPR signals, and compensate (gain) the data accordingly. We don’t need to do any interpolation between each channel of GPR data, because this is a true “3D GPR” dataset. This means that the illumination cone from each GPR antenna covers every square-centimetre of the survey area (assuming the data is collected in a regular grid pattern, of course, and that there are no gaps in the data). We need to take care with what settings we use to create the time slices, as these may exceed the capabilities of your computer’s graphics card memory (which would result in blank depth slices in the OpenGL menu, or the software might crash entirely). We might need to do some interpolation if there are gaps between swathes of GPR data. All of the above issues are discussed at length in this video, making this video a great primer for anyone using any multichannel GPR system, not just Raptor users. Please note that the GPR-SLICE Multichannel User Manual is available here. You will note that this process avoids the “slice/resample”, “gridding”, and “T-Slice” menus. You might want to use the T-Slice menu, though, in order to export time slices as image files. There is a new method that allows you to extract the .grd files (which you can then use in the Gridding menu to create the .dat files you would use in the T-Slice menu). An explanation of this function can be found here. After watching this video, we highly recommend you proceed to the introduction to GPR-SLICE video to learn how to actually perform filters on your GPR data. To purchase GPR-SLICE software, please see here. A full list of all GPR-SLICE training videos is available here. Click here to return to the GPR-SLICE help index. The post GPR-SLICE tutorial video (podcast): processing ImpulseRadar Raptor multichannel GPR data appeared first on Hunter Geophysics.

  4. 31.07.2017

    Episode 5: laser engineer, geophysicist, teacher, and pilot Dr Zara Dennis

    Zara Dennis has lived a hugely-varied life, and she’s only just getting started. In 2016, Zara combined her passions for science, flying, and teaching, and created a new educational outreach programme known as SciFly. Zara flies to rural schools throughout Australia, spreading the joy that is STEM (science, technology, engineering, and mathematics). SciFly’s website can be found at www.sciflystemoutreach.com.au Check out the Southern Hemisphere Aurora Group on Facebook if you are interested in the Aurora Australis. If you would like to make any suggestions for future episodes of the podcast, or any constructive criticism, please send Dave an email. Special thanks to Andrew Klapton for providing the fantastic photograph of the Aurora Australis taken from a cemetery; with Andrew’s permission, we are now using this photograph as the podcast’s cover image. Thanks, Andrew! The Aurora Underground podcast artwork. Photograph by Andrew Klapton. The post Episode 5: laser engineer, geophysicist, teacher, and pilot Dr Zara Dennis appeared first on Hunter Geophysics.

    47 Min.

  5. 12.08.2016

    Episode 4: ROCKET LAUNCH ALERT

    SpaceX’s Falcon 9 will be launching the JCSAT-16 mission into orbit on Sunday. Please see www.spacex.com/webcast to watch the launch and rocket landing live. The post Episode 4: ROCKET LAUNCH ALERT appeared first on Hunter Geophysics.

    3 Min.

  6. 12.08.2016

    Episode 3: engineering, programming, and aurora forecasting with Carl Gruber

    Carl Gruber is a mechanical engineer-turned-programmer and aurora forecaster. Ian Musgrave takes up his new role as our “astrono-porter” (astronomy reporter) and fills us in on what’s happening in the night sky for the rest of August, 2016. Please see www.auroraaustralis.space for forecasting workshop tickets and to join the Southern Hemisphere Aurora Group on Facebook. If you would like to make any suggestions for future episodes of the podcast, or any constructive criticism, please send Dave an email. The post Episode 3: engineering, programming, and aurora forecasting with Carl Gruber appeared first on Hunter Geophysics.

    47 Min.

  7. 14.07.2016

    Episode 2: A Conversation With Aaron Stanley

    Aaron Stanley is an aircraft mechanic-turned-meteorologist and aurora photographer. He’s currently living at Davis Station, Antarctica, supporting the Bureau of Meteorology’s Upper Air Programme. His website (with awesome aurora photographs!) can be viewed here. David Hunter will be running Aurora Australis forecasting and introductory photography workshops on 27th and 28th August. These will be the first in a series of such workshops that will be held throughout the nation over the coming months. Further details and ticket sales will be available via our website by the 20th July. David was interviewed for the Astrophiz Podcast earlier today. The interview will be posted at some point during the week commencing 20th July (all going to plan). You can check out the Astrophiz Podcast at their website. Finally, some more exciting news. We have established a new Facebook group specifically for those interested in receiving David’s aurora predictions (and general aurora chat and networking). It’s called the ‘Southern Hemisphere Aurora Group’ and can be found here.   Facebook groups that may be of interest: Southern Hemisphere Aurora Group Aurora Australis Tasmania Aurora Australis Science The post Episode 2: A Conversation With Aaron Stanley appeared first on Hunter Geophysics.

    27 Min.

  8. 03.04.2016

    Episode 1: Introduction to The Aurora Underground podcast

    This is the first episode of our new podcast! In this episode, Dave the grave Hunter discusses his work at Hunter Geophysics, his plans for the podcast, and provides two announcements: The Cemetery at Badgery’s Creek, west of Sydney in New South Wales, is being relocated. If you have family interred at the cemetery, please call 1800 038 160 by this Tuesday (6th April 2016). Many listeners will know Margaret Sonnemann, the creator of the popular Aurora Australis Tasmania group on Facebook. After overcoming a terminal illness last year, Margaret is now hoping to get her life back on-track and is raising funds to pay for her to attend the Angel Academy of Art in Florence, Italy. Margaret has set up a Pozible.com fundraiser and she would be most grateful for any donation you can manage. Please click here to hear Margaret’s story and make a donation. If you would like to make any suggestions for future episodes of the podcast, or any constructive criticism, please send Dave an email. The post Episode 1: Introduction to The Aurora Underground podcast appeared first on Hunter Geophysics.

    10 Min.
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Unmarked grave detection, GPR-SLICE software, space weather forecasting, and camera sales

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  • Erstellt von
    David Hunter - Hunter Geophysics
  • Jahre aktiv
    2016 - 2021
  • Folgen
    8
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    The Aurora Underground