Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins) header
Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins) profile picture

Dr Roger Blue Stabbins (スタビン　ロジェ　ブルー)

@rbstabbins

Spectral Imaging Simulations for Planetary Surface Exploration // UK Space Agency PDRA, NHM // Team Member for ESA ExoMars CaSSIS, PanCam & Enfys and JAXA MMX

 London, England
rbstabbins.github.io
Joined January 2009
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Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)Photo by Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Have found myself at Bluesky more and more and here less and less. Think I might start posting there a bit and all. I’m at rbstabbins.bsky.social ✌️
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I made it to Vienna! Excited to be here for #EGU2025 - I’m talking on Thursday afternoon in the Mars session on applying our Supervised Spectral Parameter Learning method to @ExoMars_CaSSIS data.
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
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For development, we searched for hematite against the background of basalts and clays expected at Oxia Planum. We found LOTS of spectral parameter combinations that achieved better than 95% accuracy. The best used 6 filters, but acc. >99% could still be achieved with just 2!
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Read on in the paper to find how hematite sensitive spectral parameters used in equivalent systems compared, and have a play with the SPTK software, that we are continuing to expand for other problems in multispectral sampling: shorturl.at/NswO0
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...and then lists all pair combinations of these. We compute the optimal linear discriminant for each pair combination, and then rank these by how well they separate the target from the background, in terms of a distance metric and accuracy metric.
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We recently published part II of our preparation for @ExoMarsPanCam papers! We developed a method and software for choosing a minimal number of vis/nir filters to downlink for the discrimination of a particular material against an expected background. doi.org/10.1029/2023EA003398
Optimizing ExoMars Rover Remote Sensing Multispectral Science II: Choosing and Using Multispectral...

Optimizing ExoMars Rover Remote Sensing Multispectral Science II: Choosing and Using Multispectral...

Method for ranking the ability of multispectral channel combinations to separate target from background material reflectance spectra Used to seek minimal number of spectral channels needed by the...

agupubs.onlinelibrary.wiley.com
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Rather than applying our dimension reduction to the full filter set, we applied it to pairs of spectral parameters. Our software (github.com/rbstabbins/sptk) computes all band depth, ratio, shoulder height and slope spectral parameters afforded by a filter set,

GitHub - rbstabbins/sptk: sptk is a Python package for investigating the ability of a multispectral...

sptk is a Python package for investigating the ability of a multispectral imaging system to identify distinct materials and material groups through differences in reflectance spectra. - rbstabbins/...

github.com
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We took advantage of public spectral libraries via westernreflectancelab.com/vi… to build a labelled training set, so we could use Linear Discriminant Analysis, the supervised sister to the well known Principal Component Analysis dimension reduction.
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Dr Roger Blue Stabbins (スタビン　ロジェ　ブルー) retweeted
Baba Yaga's Hut (@byhut) profile picture
Baba Yaga's Hut@byhut31 Jul 2024
137 first London show at @thelexington tonight. @adrianutley @sebrochford
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Dr Roger Blue Stabbins (スタビン　ロジェ　ブルー) retweeted
Baba Yaga's Hut (@byhut) profile picture
Baba Yaga's Hut@byhut31 Jul 2024
TONIGHT we are the @thelexington for 137 playing their second ever show! Feat. Larry Stabbins, @adrianutley, @sebrochford & Jim Barr. Support from another brand new act The Sick Man of Europe. Loads of tickets sold but still a few on the door. Tickets: dice.fm/event/522bk-137-adri…
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Dr Roger Blue Stabbins (スタビン　ロジェ　ブルー) retweeted
Royal Astronomical Society (@RoyalAstroSoc) profile picture
Royal Astronomical Society@RoyalAstroSoc17 Jul 2024
Next up the Winton Award for #Astronomy is presented to Dr Chris Lovell. @chrisclovell is an exceptionally promising post-doctoral scientist whose work is being used to understand some of the earliest forming galaxies discovered by @NASAWebb. #NAM2024
Dr Chris Lovell and RAS President Mike Lockwood.

ALT Dr Chris Lovell and RAS President Mike Lockwood.

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Watching friends do the things they love really well is a great way to spend time
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Pitched feedback by distance modulation against the cone angle - The Gories at The Garage
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Mallaig and magma chambers from my sisters magnificent boat Eda Frandsen!
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
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Dr Roger Blue Stabbins (スタビン　ロジェ　ブルー) retweeted
Dr. Divya (logged out) (@Divya_M_P) profile picture
Dr. Divya (logged out)@Divya_M_P2 Jul 2024
🪐 Will you be enrolled at a PhD program in the UK by Autumn 2024? ☄️ Join us for the FREE & virtual STFC Planetary Surfaces Summer School! With lectures, practica, career panels, a film screening, & more. Register by 2 August: tiny.cc/PlanetSchool2024
A dark blue quarter-circle on a white background. The title is STFC Planetary Surfaces Summer School, 13–16 August 2024, Online. In the circle is white text reading “Calling new PhD students studying earth and planetary science: Join us for a FREE, virtual summer school with lectures and practica on planetary geology, workshops and panels on career development, and special events for networking, from planetary science experts from the UK and beyond.” Above that is a white QR code labeled tiny.cc/PlanetSchool2024 and “Learn more and register by 2 August.” At the bottom of the graphic are the logos of the Science & Technology Facilities Council; SAGES; and University of Glasgow.

ALT A dark blue quarter-circle on a white background. The title is STFC Planetary Surfaces Summer School, 13–16 August 2024, Online. In the circle is white text reading “Calling new PhD students studying earth and planetary science: Join us for a FREE, virtual summer school with lectures and practica on planetary geology, workshops and panels on career development, and special events for networking, from planetary science experts from the UK and beyond.” Above that is a white QR code labeled tiny.cc/PlanetSchool2024 and “Learn more and register by 2 August.” At the bottom of the graphic are the logos of the Science & Technology Facilities Council; SAGES; and University of Glasgow.

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Geomorphology from a rover is cool and all but have you tried it from a boat?
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Anyone got a shop for Soukous records in Paris?
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the answer was @superflyrecords on Rue Notre Dame de Nazareth! A very well curated selection with nice and short descriptors. It was hard not to buy everything.
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It was a good day to visit the @LesiaAstro Paris Observatory, home of the MIRS imaging spectrometer for MMX
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
Image from Dr Roger Blue Stabbins (スタビン ロジェ ブルー) (@rbstabbins)
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Home also to another imaging spectrometer, the iconic OMEGA
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