| Risultati della ricerca nelle immagini - "Phoenix" |
A-Phoenix-000.jpgThe (fully assembled) Phoenix Mars Lander53 visitenessun commentoMareKromium
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A-Phoenix-001.jpgThe Phoenix Lander: Hot-Fire Test Mock-Up53 visitenessun commentoMareKromium
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A-Phoenix-002-0.jpgOne, Two, Three...TESTING!53 visiteL'inequivocabile presenza di un microfono, accanto ad una delle Camere di cui è dotata la Sonda Phoenix, ci suggerisce ancora nuovi ed interessanti scenari: gli Amici di Pasadena non vogliono solo fotografie ed esperimenti di "cottura" (ammesso che si riesca a farli, prima o poi...): loro vogliono anche "suoni" da Marte!
Quali? Forse il vento... Forse anche altre cose.
Ottimo l'Occhio del Dr Faccin e notevole l'intuizione dello STAFF di Lunexit quando, alcuni mesi fa, abbiamo pensato che l'idea di un "Audio-File" da Marte potesse anche essere una buona idea.
E se lo è, allora Phoenix NON ha l'esclusiva del suono...Credeteci!MareKromium
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A-Phoenix-002.jpgThe Phoenix Lander and its Solar Panels in the "Clean Room"60 visitenessun commentoMareKromium
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ESP_014103_2485-ESP_014393_2485.jpgLook who's there: the Phoenix Lander! (Natural Colors; credits: Lunexit)54 visiteThe High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter captured Winter images of NASA's Phoenix Mars Lander surrounded by dry-ice frost on Mars.
As the Sun began to reappear on the horizon following the deepest, darkest days of North Polar Winter on Mars, the HiRISE camera imaged the Phoenix Landing Site on July 30, 2009, (left image) and in Aug. 22, 2009 (right).
The Sun was only 1° above the Local Horizon when the July image was taken at approximately 14:00 M.L.T. .-
In the August image the Sun was 6° above the L.H. when the image was taken, at about 13:44 M.L.T. .
By matching up the images with the known location of the Lander, the HiRISE team identified the hardware, disguised by frost, despite the fact that the views were hindered by poor lighting and atmospheric haze, which often obscures the Martian Surface at this location and season.
Carbon Dioxide frost completely blankets the Surface in both images. The amount of brightness doesn't necessarily indicate the amount of frost seen in the image because of the way the images are processed to produce optical contrast. Each of these images is stretched differently for optimal contrast, so "bright" and "dark" can't be compared directly between images without doing complex calibrations. In fact, if you stretched all of them exactly the same, the darker areas in the frost covered images are still brighter than typical soil, like that surrounding the Lander in the frost-free image.
Other factors affect the relative brightness, such as the size of individual grains of CO2 ice, the amount of dust mixed in with the ice, the amount of sunlight hitting the Surface, and different lighting angles and slopes. The winds are also changing direction and strength, moving loose frost and dust around over time.
Studying these changes will help scientists understand the nature of the seasonal frost and Winter Weather Patterns in this area of Mars.
The amount of CO2 frost is increasing as late Winter transitions to early Spring, so the layer of frost is getting thicker in each image, slowly encasing the Lander. The maximum thickness was expected to be on the order of tens of centimeters, which would have reached its peak in September 2009. The thickness has not been confirmed yet because the MRO Spacecraft suspended taking images when it entered safe mode on August 26.
Oct. 26, 2009, marked the first day of Spring in the Northern Hemisphere of Mars.
The Planetary Society has put together an animation comparing the hardware at different times. (see ---> http://www.planetary.org/blog/article/00002182/).
The Phoenix Mars Lander ceased communications last November (2008), after successfully completing its mission and returning unprecedented science data to Earth. Launched Aug. 4, 2007, Phoenix safely touched down on Mars on May 25, 2008, at a site farther North than where any previous Spacecraft had landed. During the first quarter of 2010, teams at JPL will listen to see if Phoenix is still able to communicate with Earth. Springtime thaw images may also be available.
These views are a portion of a HiRISE image which is available in full-frame at http://hirise.lpl.arizona.edu/ESP_014393_2485.
MareKromium
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Lifeforms-008-lg_27595-lg_27598-2.gifMicroscopic Lifeforms in Motion? (GIF-Movie; credits: Dr G. Barca) 88 visite...Sicuri che si tratti solo di "polveri" smosse dal vento?!?...MareKromium
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PHOE-SOL000-HIRISE.jpgThe Descent of Phoenix, from MRO - Sol 054 visiteCaption NASA:"NASA's Mars Phoenix Lander can be seen parachuting down to Mars, in this image captured by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. This is the first time that a spacecraft has imaged the final descent of another spacecraft onto a planetary body.
From a distance of about 310 Km (193 miles) above the surface of the Red Planet, Mars Reconnaissance Orbiter pointed its HiRISE obliquely toward Phoenix shortly after it opened its parachute while descending through the Martian Atmosphere. The image reveals an apparent 10-meter-wide (30-foot-wide) parachute fully inflated. The bright pixels below the parachute show a dangling Phoenix. The image faintly detects the chords attaching the backshell and parachute. The surroundings look dark, but correspond to the fully illuminated Martian surface, which is much darker than the parachute and backshell.
Phoenix released its parachute at an altitude of about 12,6 Km (7,8 miles) and a velocity of 1.7 times the speed of sound".MareKromium
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PHOE-SOL000-PSP_008579_9020.jpgThe Descent of Phoenix, from MRO - Sol 0 (MULTISPECTRUM; credits: Lunexit)53 visiteCaption NASA:"MRO's HiRISE camera acquired this dramatic oblique image of Phoenix descending on its parachute. Shown here is a a wider view of the full image, showing a 10 Km diameter crater informally called “Heimdall,” and an improved full-resolution image of the parachute and lander (in the inset).
Although it appears that Phoenix is descending into the crater, it is actually about 20 Km in front of it. It is difficult to believe that it is in front of the crater because it is so much smaller, but in reality it is, and that's a good thing because landing on the steep rocky slopes of the crater would have been far too exciting (or risky).
Images from the lander clearly show that it sits on a flat plain, although the rim of Heimdall may be visible on the horizon. Given the position and pointing angle of MRO, Phoenix is at about 13 Km above the surface, just a few seconds after the parachute opened.
This improved image shows some details of the parachute, including the gap between upper and lower sections. At the time of this observation, MRO had an orbital altitude of 310 Km, traveling at a ground velocity of 3,4 Km/second, and a distance of 760 Km to the Phoenix lander.
The image was rotated to a position that seems approximately parallel to the horizon based on the elongation of Heimdall Crater, but this is not exact. Thus, although Phoenix appears to hang from the parachute at an angle, as if swaying in the wind, the exact geometry has not yet been determined. The parachute image is very sharp as its apparent motion was straight down the HiRISE TDI (Time Delay Integration) columns. However, the surface of Mars was moving at an angle to the TDI columns, and thus is smeared by a few pixels, although the smear is not apparent at the reduced scale of the image shown here.
The Sun is almost directly behind HiRISE, so the parachute should be casting a shadow onto the slope of the Crater, but we cannot determine which of many dark spots is the shadow until a detailed geometric analysis has been completed". MareKromium
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PHOE-SOL001-P-lg_431.jpgOne "Leg" and "Landing Pad" of Phoenix - Sol 1 (Natural Colors + MULTISPECTRUM; credits: Dr M. Faccin & Lunexit)53 visitenessun commentoMareKromium
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PHOE-SOL002-lg_527.jpgTwilights over Vastitas Borealis... - Sol 2 (MULTISPECTRUM; credits: Lunexit)53 visitenessun commentoMareKromium
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PHOE-SOL002-lg_533.jpgPhoenix in True Colors! - Sol 2 (credits: Dr Marco Faccin)53 visitenessun commentoMareKromium
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PHOE-SOL002-lg_542.jpgTwilights over Vastitas Borealis... - Sol 2 (MULTISPECTRUM; credits: Lunexit)53 visitenessun commentoMareKromium
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