Skrifennow

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Northern Martian mid-latitudes: Mareotis Fossae

Nov 11, 2015

Continuing the northern Martian mid-latitudes, here is the Mareotis Fossae area:

The HRSC tiles, with DTM overlaid in green on the grayscale nadir image.
All of the HRSC tiles use the above colour scheme for the elevation.
The MOLA DTM elevation colour-coded.
The MOLA elevation colour ramp.

The MOLA DTM hillshaded.

Tanaica Montes area at 90°W, 40°N:




Souness 70 at 90°W, 40°N, overlapping with HiRISE coverage.
ESP_017148_2205

Tempe Colles area (85°W, 35°N)


Certain areas have substantial amounts of terrain favoured by the classifier as being topographically similar to glacier head or extent areas but have few Souness GLFs.


Baphyrus Catena at 84°W, 39°N. Five Souness GLFs are found in this field of view, and the HiRISE fields PSP_005663_2195 and ESP_027855_2195 are located overlapping or near to Souness GLFs.
PSP_005663_2195

ESP_027855_2195

Area at ~ 86°W, 44°N with several Souness GLFs.
The HiRISE images ESP_028910_2240 and ESP_016739_2240 overlap with Souness 58.
ESP_028910_2240

ESP_016739_2240
An area somewhat further NE at 84-83°W, 45°N with several more Souness glacier-like forms. There is a HiRISE stereo pair with 3D anaglyph as well as two further HiRISE footprints in vicinity of GLFs.
PSP_007232_2260 overlapping with Souness 43.

Anaglyph ESP_016673_2255_ESP_017741_2255 near Souness 41 and 42.

ESP_029411_2255 overlapping Souness 38.

An area further to the east in HRSC tiles h5401 and h5383 around 72°W, 48°N, showing several Souness GLFs and gullies. It shows that the classifier is not very specific to the Souness type valley glacier analogue objects, given that it shades many other areas as well.

At around 81°W, 49°N in HRSC tile h1528, a further example of the classifier shading a much broader range of terrain than that underlying Souness GLFs. The HiRISE images ESP_016752_2300 and ESP_024334_2300 overlap GLFs in this field.

ESP_016752_2300 overlapping Souness 25.

ESP_024334_2300 overlapping Souness 23.



Back to the North of Mars - Erebus Montes, Olympus Mons, and Alba Mons

Nov 10, 2015

We turn again to the northern hemisphere of Mars, with the areas around Erebus Montes and north of Olympus Mons shown in this post.

Ultimately I'd like to work out a way to have zoomable images, I'm thinking of using something like Leaflet.js. For now I show a few areas of interest.


The area to the north of Olympus Mons has a lobate debris apron believed to have formed through glacial processes at an earlier epoch than the Souness GLFs.

The elevation colour ramps, with one ramp used for the h0037 field, which also has some contrast/brightness adjustment in the nadir image tile, and the second colour ramp for all other fields shown above.

Showing the elevation only, and a version blended with a hillshaded DTM:



Erebus Montes - tile h1258

This area has a HiRISE anaglyph available. I have only noted anaglyphs in the vicinity of Souness objects published up to summer 2014, there may be others of interest, using JMARS, Google Earth or the HiRISE website you may find others.

With the classifier values, showing blue for 'extent' areas, and red for 'head' areas as usual

Further south in tile h1258

Ln(K) again


Close up of Souness 122 showing overlap with area covered by HiRISE anaglyph
Thumbnail of HiRISE anaglyph.

Acheron Fossae region

The area to the north of Olympus Mons showing a number of Souness GLFs.
Ln(K) across this area.

Ln(K) for part of h1232 and h1210


Part of h0037

Close up of Souness 86 (head shown with the red circle) with overlapping HiRISE anaglyph footprint.

Thumbnail of HiRISE anaglyph

Cornish Language Shop 'Kowsva' appears on Newyddion on S4C

Nov 9, 2015

Recently the Cornish language shop Kowsva run by Kowethas an Yeth Kernewek featured on the national TV news in Wales, appearing on Newyddion on 3rd November on S4C.

Here is the report, to which I added subtitles in English and Cornish, which is labelled as Corsican due to auto-complete.

Please click on the 'cog' icon at the lower-right of the video to choose the subtitle language.

Ebrenn y'n Nos mis-Du 2015

Nov 7, 2015

This is a transcript of the November 2015 episode of Ebrenn y'n Nos (The Sky at Night in Cornish)  which was broadcast in #248 of Radyo an Gernewegva.
  
Dydh da. Ottomma rann nowydh kevres "Ebrenn y'n nos" mis-Du.
An mis ma, yma an nosow hwath orth aga hirhe. Wosa an klokkys eth war-dhelergh an howlsedhes eth a-varra. 

War Kalann Gwav yma'n howlsedhes (diworth Kardhinan) 1655, ha'n diwedh an mis, dhe'n 30ves, 1618. Howldrevel yw 0709 dhe'n dhalleth an mis ha 0756 dhe'n diwedh.
Yma an pedrek Pegagus hag Andromeda hwath gweladow, dell leveris vy yn mis-Hedra.

My a vynn derivas nebes a'n bagas ster Pleiades, neb yw aswonnys avel 'An seyth hwoer', po M45. Yth yw an bagas na ogas ha peswar kans ha hanter blydhen-wolow diworthyn. Yn spit an hanow, yma moy es mil sterenn y'n bagas. Yma niwl-ster dastewynnyans a-dro dhe'n ster, nagyw es dh'y weles marnasyn skeusennow hir aga diskudhans.

An Pleiades, niver 45 yn Katalog Messier. Imaj diworth Wikimedia/Digitized Sky Survey.
Niwl-ster dastewynnyans y'n Pleiades. Imaj diworth Wikimedia/HST.

Yma an Pleiadespoesek yn henhwedhlow lies poblow, y'ga mysk an Geltyon. An kynsa delinyans an Pleiadesusiaswonnys yw Plasenn Ebrenn Nebra ogas ha 1600 KK. Hi yw plasenn alkan gans imaj an howl ha'n loer ha nebes sterennow. Diskudhys o hi yn tre Almayn, Nebra, ha dre hwilans isotop aswonnys yw bosowr ha sten ynno a dheuth a Gernow. Paperys skrifys a-dro dhe fenten an owr (Ehser et al. 2011, Eur. J. Mineral, Vol. 23 895-910) ha'n sten (Haustein et al. 2010, Archaeometry Vol. 52 5(2010) 816-832). Gwiasva Plasenn Ebrenn Nebra dhe'n Landesmuseum für Vorgeschichte Sachsen-Anhalt.

Plasenn Ebrenn Nedra. Erthygel Wikipedia - a vynn nebonan y dreylya dhe Gernewek? Gwydheo yn hy hever yn Almaynek.

Yn henhwedhlow Grek an Pleiadeso myrghes Atlas ha Pleione ha kowetha Artemis, a wrug bos treylys yn ster dhe dhiank rag Orion.
Rag lies henboblow, termyn an blydhen pan wrug an Pleiadesgwelys kynsa a-rag an howl yn bora o poesek y'ga kalendar.
An loer yw orth hy kwartron diwettha 3a mis-Du, loer nowydh an 11ves, kynsa kwartron 19ves ha loer leun dhe'n 25ves.
Nyns yw planetysgweladow y'n ebrenn gorthugher marnas Uran ha Neptun, yn gorthugher a-varr. Yth yns i re bell ha gwann aga splannder dhe vos gweladow dre dhewlagas noeth, mes gans map ster ha diwlagatell po pellweler y hyllons i bos gwelys. Nyns yw possybl dhe weles travythmarnas disk munys glas. Neptun yw poesek yn istori kernewek, drefenn wrug John Couch Adams o genys yn Lanest ogas ha Lanstefan yn Kernow y dhargana dre awrgrym. Yth esa an movyans Uran dihaval orth an pyth o gwaytys dre tybieth gravedh Newton. Nebonan yn Pow Frynk, Le Verrier a wrug gul an keth awrgrym yn kettermyn ha'n diskudhans y honan o gwrys yn Almayn.
Y'n ebrenn bora yma Meurth, Gwener ha Yow gweladow y'n soth-est kyns an howldrevel, ha Mergher isella y'n soth-est a-varr y'n mis ha dos ha bos anweladow ogas dhe'n howl diwettha y'n mis.
Kyn hwra New Horizonsspedya yn efander down, yma ev hwath danvonn y dhata. Ev a wrug danvonn skeusennow an loeryow Pluton: Charon, Hydra, Nix, Styx ha Kerberos. 
Imaj diworth gwiasva New Horizons.
 
An efanvos DAWN usi ow resegva an planet korr Keres a yn resegva isella, owth usya y jynn dhe diyskynn diworth ughelder 1470 km bys dhe 380km. Ev a wra gul skeusennow manylys anodho.
NASA a wrug kollenwel efanvos nowydh OSIRIS-REx a wra lonchya mis-Gwynngala nessa, ha mos dhe blanetik ogas dhe'n norvys, Bennu, usi 500m y vraster. An towlenn yw dhe dreyla 2 vlydhen y'n fordh dhe'n planetik, ha kavoes sampel doust ha temmigow karrek anodho, ha'y dhri dhe'n norvys arta yn 2023. 
OSIRIS-REx. Gwiasva NASA yn y gever.
 
ESA a wrug dewisa savle-tira rag ExoMars, an rosyell a vynnons i tira war eneb Meurth yn 2019. I a vynn hy thira yn Oxia Planum, mayth eus kanalys sygh a'n jeffa dowr yn termyn eus passyes. Mar nyns yw an efanvos parys rag lonch mis-Me nessa, y fydh delatys rag dew vlydhen dhe wortos an nessa alinyans Meurth ha'n Nor.
Rosyell ExoMars 2018. Imajys diworth Spaceflight Now/ESA.

Savle tira yw dewisys, gans ughelder lymnys dre liwyow.

Mars yw an lonch delatys, y hyll tira yn Oxia Planum hwath, po Aram Dorsum po Mawrth Vallis. Henn a styr 'Nans Meurth' yn Kernewek - an hanow 'Mawrth Vallis' yw kemmysk Kembrek ha Latinek. Yma lies Valles war Meurth gans hanow an planet Meurth yn lies yethow arnowydh ha hen. Yn sur yma lowr a nansow heb hanow war Veurth rag kavoes spas rag 'Meurth Vallis'.



Bys nessa prys.

The Southern Foothills of Tharsis

Nov 6, 2015

This will be the last of the southern hemisphere summary plots, covering the area south of the Tharsis bulge and surrounding areas.

It is a large area with relatively small numbers of scattered Souness GLFs, often found in crater walls.

HRSC DTM tiles in area south of Tharsis in western southern mid-latitudes.


Elevation colour ramp used for all HRSC DTM tiles above
MOLA elevation alone.


Elevation colour ramp for MOLA data
Hillshaded MOLA topography.

Below is an close up of a crater in the northern part of tile h2501.
The GLFs in this area, of which four are shown in the images below, are at an elevation of around 2000m above datum, with the crater floor generally around 1000m, and the surrounding plain at about 2500.

A crater found in the H2501 tile of HRSC at 100°W, 46°S.


There are four Souness catalogued objects and the classifier picks out areas with high similarity to the topography of the Souness GLFs (red - head areas, blue - extent areas). The crater walls also show areas of gullies, and an inner depression in the centre.
The north wall of the crater. A region close to the leftmost Souness GLF in this image is covered by HiRISE.

The western wall, containing a Souness GLF and areas of gullies. There is a HiRISE image covering an area near to the Souness GLF in the western wall.

The southern part of the crater

An oblique view of CTX imagery of the north wall of the crater. The red outline denotes HiRiSE coverage.
Looking SW towards the western wall of the crater.

A subpopulation of Souness GLFs at high elevation

This area has some of the highest elevation Souness GLFs there are. All 5 of the GLFs at higher than +6000m fall within HRSC tiles h0266 and h0453.

The Warrego Valles area showing HRSC tiles h0266 and h0453.
Part of h0266 showing 4 Souness GLFs.

The classifier may not be expected to work well, because the objects are outside the elevation range of the rest of the Souness GLFs. It does behave somewhat differently because the 'head' areas are much less prominent.

Part of h0453 showing Souness 844 which is the highest elevation GLF of all. The head area is at an elevation of 7485m.

Classifier output.


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