@sharponlooker@mastodon.social
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sharponlooker

@sharponlooker@mastodon.social

Husband & Dad. Software Engineer. Planetary Science aficionado. Casual artist. Basque/Spanish heritage, assimilated Swede = suecobilbaíno. SW sequelist.

This profile is from a federated server and may be incomplete. Browse more on the original instance.

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Dr. Robert Barnes with a summary of ongoing geoanalysis of the upper fan work by , on the "Planetary Geomorphology Image of the Month" blog

"Stratigraphic views from the apex of the Jezero western fan"
https://planetarygeomorphology.wordpress.com/2024/05/31/stratigraphic-views-from-the-apex-of-the-jezero-western-fan/

Final paragraphs of the post: "The full synthesis of all the data from Gnaraloo Bay is ongoing, but the evidence so far implies that the stratigraphy at Gnaraloo Bay records the initial deposition of migrating dune scale bedforms eroding into Margin Unit deposits. This was followed by a stage of deposition of lower flow regime coarse to pebbly sandstone, probably in shallow flows which have been preserved where they were covered by the late episode of channelized high magnitude flood flow boulder deposition sourced from the Neretva Vallis inlet."

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Vein sandwich 🙃

Crop of sol 1164 Mastcam by (lower left)

https://mars.nasa.gov/mars2020/multimedia/raw-images/ZL0_1164_0770275381_910EBY_N0524312ZCAM03911_0340LMJ

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Caption this 🙃

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A model for attenuation and speed of sound on Mars' surface. Thanks to section 1, I realized that somehow it had escaped me that there are sound recordings from Venus 🤯

Gillier et al: Geographical, Seasonal and Diurnal Variations of Acoustic Attenuation, and Sound Speed in the Near-Surface Martian Atmosphere
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JE008257

Sections 4.4 (Perspective and Future Work) and 5 (Conclusion)

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@65dBnoise I'm curious, where was Perseverance looking at in this SuperCam from sol 1149

https://mars.nasa.gov/rss/api/?feed=raw_images&category=mars2020&feedtype=json&id=LRF_1149_0768939317_146EBY_N0522540SCAM01149_0010I6J

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@65dBnoise 🙃

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Zoom on #Ingenuity on its final resting place at #ValinorRipples, as imaged by #PerseveranceRover with Mastcam and Supercam on different sols.

Source image treatments by @NeV_T & @stim3on (links in next post)

Crops of different viewing angles and at different daytimes. Supercam images carry more detail and software-enhancements

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Still mesmerized by the multiple wavy patterns on the Neretva ripples (likely cause, wind sorting https://deepspace.social/)

I think the best views are still from sol 1110, best on low phase angle from Mastcam. Here are my fav ripples, with @NeV_T 's treatment.

@65dBnoise @stim3on do you think there's even a better way to increase the contrast of those waves (I can't get better results with my tools). The ultimate test is to reveal that subtle wave to the right of the blue line

image/png

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Old but gold on dunes, ripples etc
https://www.planetary.org/articles/0219-sand-waves-in-the-desert

re lboost https://mastodon.social/@65dBnoise/112331265524574099

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Lee waves and the start of a Martian dust storm east of as imaged by . This is a speeded up version of the supplemental movie in this paper:

Gebhardt et al: "Sub-Hourly Observations of Dust Storm Growth, Lee Waves, and Lyot Crater, by the EMM Camera EXI"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL105317

video/mp4

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Spring in the air

sharponlooker, to random
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The JGR Planets paper on is out now! This week's read 😉

Caravaca et al: "Depositional Facies and Sequence Stratigraphy of Kodiak Butte"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JE008205

Figure 3, Kodiak views and unit specifications
Figure 10, proposed evolution model, oldest stage last.

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Fascinating on why and how to establish the orientation of the samples. Section 1.1 has the scientific justification, the rest is a deep-dive on the how (things like the L patterns lasered on the rocks, coordinate systems...)

Weiss et al: "Oriented Bedrock Samples Drilled by the Perseverance Rover on Mars"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023EA003322

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Something for you @65dBnoise : pressure analysis sols 0-440 & comparison with other landers & rovers.

Harri et al: "Perseverance MEDA Atmospheric Pressure Observations—Initial Results"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JE007880

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@andrealuck Have you seen there's a fresh paper focussing on dust storms? Unfortunately paywalled, but the so-called "Open Research" tab has data references that are maybe helpful for the processing you do with their stuff

Guha et al : "Seasonal and Diurnal Variations of Dust Storms in Martian Year 36 Based on the EMM-EXI Database"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JE008156

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Lady Winter hasn't left us yet

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Map of for and process paper. Using some shared tools with NASA rovers like

Fawdon, @mapperwocky et al : "The high-resolution map of Oxia Planum, Mars; the landing site of the ExoMars Rosalind Franklin rover mission"
https://www.tandfonline.com/doi/full/10.1080/17445647.2024.2302361

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My folks are on an seniors' excursion in Catalunya; they just sent me this photo, I think from La Mussara, and I had to resist the urge to preach abt 🙃

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Finding "hidden" topographic features with advanced mapping techniques! Clear and concise connections to all Jezero science, loved this paper.

Annex & Ehlmann: "Elevation Anomalies of the Volcanic Floor Unit and Their Relationships to the Multiple Lakes of Jezero"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL108069

Video cuts from the supplemental information: https://agupubs.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1029%2F2023GL108069&file=2023GL108069-sup-0002-Movie+SI-S01.mp4

Shorter version of the supplemental video, showing Shallow‐Sloped Depression number 2 in a vertically exaggerated 3D context of Jezero
Shorter version of the supplemental video, showing a close view of Escarpment Bounded Depression number 8 on a vertically exaggerated DTM of Jezero

sharponlooker, to random
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"Diamond" #asteroids rotated, for no special reason 😉

(sources in alt text)

Dinkinesh & Selam family photo rotated so that poles are on the sides. Fig. 1 from https://www.hou.usra.edu/meetings/lpsc2024/pdf/2388.pdf
Ryugu rotated so that poles are on the sides. Credits: JAXA, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University, University of Aizu and AIST
Bennu rotated so that poles are on the sides. From https://www.nasa.gov/news-release/nasa-spacecraft-provides-insight-into-asteroid-bennus-future-orbit/

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Red waters & skies

Brave waters right after a small power dam and a fair sunset

sharponlooker, to random
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How cool is it that was at an adequate spot to image and science the impact?

Weaver et al "Lucy Observations of the DART Impact Event"
https://iopscience.iop.org/article/10.3847/PSJ/ad1ee5

Figure 1, geometry of the imaging campaign

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Stack et al: "Sedimentology and Stratigraphy of the Shenandoah
Formation, Western Fan, Jezero Crater"

Peer-reviewed, open access

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JE008187

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Shitsnow 🙃

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Thread of papers from last boost: https://astrodon.social/@TMEubanks/111869966667933015

Horgan et al, "Campaign Overview and Initial Results from Exploration of the Margin Unit in Jezero Crater by the Perseverance Rover"
https://www.hou.usra.edu/meetings/lpsc2024/pdf/2624.pdf

Extract from the preliminary interpretations

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