MARDI microphone, maybe possibly it'll be turned on? |
MARDI microphone, maybe possibly it'll be turned on? |
Oct 9 2008, 02:33 AM
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#31
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
Like this? No, like what exposure time a specific image was taken with. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 9 2008, 02:37 AM
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#32
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Exposure information can be found in the header for all the JPEG images. Attached is a .csv file (zipped) with the metadata from all the JPEGs available to date, stripped from the headers using Midnight Mars Browser.
--Emily
Attached File(s)
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 9 2008, 02:46 AM
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#33
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
Exposure information can be found in the header for all the JPEG images. Thanks for the CSV file! Apparently very few extent JPEG viewers can read the EXIF tags for some reason. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 9 2008, 03:14 AM
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#34
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Hmm. If I want to see a header, usually I just open the JPEG file in a text editor. --Emily
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 9 2008, 09:08 AM
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#35
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Junior Member Group: Members Posts: 57 Joined: 6-September 07 From: Netherlands Member No.: 3683 |
Apparently very few extent JPEG viewers can read the EXIF tags for some reason. Irfanview works a treat. Just hit the 'image information' button or press 'i' and hit hit the 'comment' button or press 'c'. -------------------- Error: Life.sys corrupted
( R )eflect, ( R )epend, or ( R )eboot? |
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Oct 15 2008, 02:33 PM
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#36
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
QUOTE "Hello...hello...(tap, tap, tap)...is this thing on? I just flew here all the way from Earth, boy are my solar panels tired! (pause for laughter) It's great to be here on the martian arctic plain...Do we have any martians out there tonight?...." But seriously, when is the microphone going to be activated? The recordings of Martian sounds would make a dramatic backdrop for every image of Mars ever captured. I'd hate to have the only sound sent to Earth be a 5-second clip of a solar panel snapping off from frost. [/vent] -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Oct 15 2008, 04:19 PM
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#37
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
The recordings of Martian sounds would make a dramatic backdrop for every image of Mars ever captured. Let me try to lower your expectations. The audio is only digitized at 8 KHz (telephone quality at best), so even if it does work, IMHO it's not going to "make a dramatic backdrop" to anything. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 15 2008, 04:27 PM
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#38
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Please say it's not 8 bits/sample!
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Oct 15 2008, 05:16 PM
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#39
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
It's not 8 bits/sample
(you said please) If it's roughly the same as the '98 one, the ADC is 12bit. Prepare to be unamazed by the quality. http://www.planetary.org/programs/projects...microphone.html |
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Oct 15 2008, 05:39 PM
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#40
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
I am indeed unamazed, but at least the sample depth is 12 bit. 8 bits is pretty much useless and very noisy for any appreciable dynamic range.
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Oct 15 2008, 05:56 PM
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#41
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
If it's roughly the same as the '98 one, the ADC is 12bit. It's got nothing in common with the Planetary Society microphone, but it's not 8 bits. "DSP561xx processors are noteworthy because they include a sigma-delta codec on-chip. The sigma-delta codec provides linear, analog I/O with 16-bit resolution over a bandwidth of approximately 4 kHz. Motorola states that the codec has a signal to noise-plus-distortion ratio of greater than 60 dB. " As always with ADCs, though, caveat emptor about how many of the stated bits are actually significant... QUOTE Prepare to be unamazed by the quality. Indeed. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 15 2008, 06:31 PM
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#42
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
Well, I wouldn't say that we exactly need high-fidelity surround-sound here! Do we expect much Martian sound above 8 kHz? Obviously higher signal-to-noise improves our chances of hearing anything at all, but I for one would be thrilled to hear even a sub-telephone-quality recording of the creaking of the solar panels flexing in the wind.
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Oct 15 2008, 07:20 PM
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#43
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
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Oct 15 2008, 09:35 PM
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#44
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Junior Member Group: Members Posts: 21 Joined: 6-August 08 From: Augusta, Maine Member No.: 4305 |
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Oct 21 2008, 04:04 PM
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#45
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
From the BBC:
QUOTE We'll start slowly, just turn it on and make sure it records sound, and we'll try and make some noise to make sure it's working. We'll try scraping ice with our robotic arm blade and we can bang a few pots or something. Then we'll listen just for the Mars sounds by themselves.
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