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02.10.2009
HRSC Press Release #443 - Daedalia Planum (orbit 6396)
Perspektive [1] |
On 25 December 2008 the High-Resolution Stereo Camera (HRSC), under the leadership of the Principal Investigator Prof. Dr. Gerhard Neukum of Freie Universitaet Berlin, onboard the ESA spacecraft Mars Express obtained image data in orbit 6396 with a ground resolution of approximately 17 meters per pixel. The data were acquired in the region Daedalia Planum at approximately 21° southern latitude and 243° eastern longitude.
Kontextkarte [2] |
Daedalia Planum ist eine relativ wenig bekraterte Ebene süd-südöstlich des 14 Kilometer hohen Vulkans Arsia Mons (siehe Veröffentlichung #046), einem der größten Vulkane des Mars. Die Ebene wird von zahlreichen erkalteten Lavaströmen unterschiedlichen Alters dominiert. Das hier abgebildete Gebiet hat eine Ausdehnung von ca. 150 Kilometer x 75 Kilometer und bedeckt eine Fläche von ca. 11.250 km². Die gezeigte Region ist damit in etwa so groß wie Jamaika.
Daedalia Planum is a relatively sparsely cratered, widely untextured plain south-southeast of Arsia Mons (see press release #046), one of the largest volcanoes on Mars. Its base has a diameter of 350 Kilometer and it reaches a height of 14 kilometers. The plain is dominated by numerous lava flows of varying ages. The image exhibits a region of approximately 150 kilometers x 75 kilometers and covers an area of 11.250 km², which is about the size of Jamaica.
Farbkodiertes Höhenmodell [3] |
Das gesamte Gebiet zeigt zahlreiche erkaltete Lavaströme verschiedener Alter und Oberflächenstrukturen. Die Lavaströme haben ihren Ursprung an der Südflanke des Vulkans Arsia Mons. In der Lagekarte [1] sind zwei Lavaströme zu erkennen. Der jüngere Lavastrom im oberen Bildausschnitt zeigt deutliche Fliessstrukturen, sogenannte „pressure ridges“, sowie den Lava-Kanal (lava channel, siehe oben rechts). Im Gegensatz dazu ist ein deutlich älterer Lavastrom im unteren Bildbereich zu sehen. Auf diesem sind mehr Einschlagskrater zu erkennen, und die Lavaoberfläche erscheint glatter aufgrund von Sedimentakkumulation im Laufe der Zeit.
Lagekarte der beschriebenen geologischen Strukturen [4] |
Nadiraufnahme [5] |
RGB Farbbild [6] |
Rot-Cyan Anaglyphe [7] |
Furthermore, it is interesting to observe how existing impact craters have been modified by lava. The two largest impact craters show different stages of modification (see Red-Cyan anaglyph 1). The largest impact crater (bottom) was not affected by lava flow formation, however, its ejecta blanket is already partially covered. The second largest impact crater has been flooded almost entirely. Minor portions of the rim are still preserved. Due to a breach of the rim, lava was able to enter the crater filling it up. Fully covered impact craters whose outlines are still visible are also known as ghost craters. One ghost crater is located in the immediate vicinity of the second largest impact crater.
Perspektive #2 [8] |
The colour scene has been derived from the three HRSC-colour channels and the nadir channel. The perspective views have been calculated from the digital terrain model derived from the stereo channels. The anaglyph image was calculated from both stereo channels. The black and white high resolution image was derived from the nadir channel which provides the highest detail of all channels.
Perspektive #3 [9] |
The High Resolution Stereo Camera (HRSC) experiment on the ESA Mars Express Mission is led by the Principal Investigator (PI) Prof. Dr. Gerhard Neukum who also designed the camera technically. The science team of the experiment consists of 40 Co-Investigators from 33 institutions and 10 nations. The camera was developed at the German Aerospace Center (DLR) under the leadership of the PI G. Neukum and built in cooperation with industrial partners (EADS Astrium, Lewicki Microelectronic GmbH and Jena-Optronik GmbH). The experiment on Mars Express is operated by the DLR Institute of Planetary Research, through ESA/ESOC. The systematic processing of the HRSC image data is carried out at DLR. The scenes shown here were created by the PI-group at the Institute for Geological Sciences of the Freie Universitaet Berlin in cooperation with the German Aerospace Center (DLR), Institute of Planetary Research, Berlin.
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hochaufgelöste Bilddaten / high resolution image data
Kontextkarte [2]: |
Farbkodiertes Höhenmodell [3]: |
Lagekarte der beschriebenen geologischen Strukturen [4]: |
Nadiraufnahme [5]: |
RGB Farbbild [6]: |
Rot-Cyan Anaglyphe [7]: |
Perspektive [1]: |
Perspektive #2 [8]: |
Perspektive #3 [9]: |
© Copyright: ESA/DLR/FU Berlin (G. Neukum)