Starship Asterisk*

rstevenson wrote:I'm curious as to why they didn't use aerobraking for this mission. Yes, it can take a while, perhaps six months of repeated passes, but it would greatly slow the craft and result in, I assume, a gentler approach to landing.

rstevenson wrote:
I'm curious as to why they didn't use aerobraking for this mission. Yes, it can take a while, perhaps six months of repeated passes, but it would greatly slow the craft and result in, I assume, a gentler approach to landing.

Vonskippy wrote:Makes me worried when the Nasa engineers can't sync a simple audio track to the video track on a 5 minute youtube video.

Lets hope they did a better job on the 7 minute landing sequence.

I wonder if Vegas has a betting pool for this landing?

Vonskippy wrote:Makes me worried when the Nasa engineers can't sync a simple audio track to the video track on a 5 minute youtube video.

Lets hope they did a better job on the 7 minute landing sequence.

I wonder if Vegas has a betting pool for this landing?

NoelC wrote:Ambitious and impressive! Best of luck.

Did anyone else see/get this little joke?

HalfMil.jpg (25.52 KiB) Viewed 4429 times

As a software engineer I got a good laugh out of it.

-Noel

NoelC wrote:There's nothing wrong with the audio/video sync. Chances are they use better computers than yours.

-Noel

geckzilla wrote:

NoelC wrote:
There's nothing wrong with the audio/video sync. Chances are they use better computers than yours.

The audio gets out of synch slightly for me at the end. I don't think it's my computer.
It's like a tenth of a second off and gets worse towards the end.

ta152h0 wrote:
I think they do have a descent camera

• On Curiosity, itself, pointing down.

http://en.wikipedia.org/wiki/MSL_Curiosity wrote:

<<MSL Mars Descent Imager (MARDI): During the descent to the Martian surface, MARDI will take color images at 1600×1200 pixels with a 1.3-millisecond exposure time starting at distances of about 3.7 km to near 5 meters from the ground and will take images at a rate of 5 frames per second for about 2 minutes. MARDI has a pixel scale of 1.5 meters at 2 km to 1.5 millimeters at 2 meters and has a 90-degree circular field of view. MARDI has 8 GB of internal buffer memory which is capable of storing over 4,000 raw images. MARDI imaging will allow the mapping of surrounding terrain and the location of landing. JunoCam, built for the Juno spacecraft, is based on MARDI.>>

Baaaab wrote:What is 500,000 lines of COD3 ?

Bix Dugan wrote:
Why not just safely splash down in one of the Canals?

http://www.universetoday.com/96617/curiositys-target-martian-destination/ wrote:
<<Where will the Mars Science Laboratory Curiosity rover land? This annotated image of Mars by Efrain Morales shows where on Mars Curiosity will set down, if all goes well, at about 05:31 UTC on Aug. 6 (10:31 p.m. PDT on Aug. 5, 1:31 a.m. EDT Aug. 6). The landing site is 4.6 degrees south latitude, 137.4 degrees east longitude, near base of Aeolis Mons, also known as Mount Sharp, a layered mountain that rises 4.8 kilometers (3 miles), inside Gale Crater.>>

http://www.planetary.org/blogs/emily-lakdawalla/2012/08060824-hirise-curiosity-parachute.html wrote:

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Mars Reconnaissance Orbiter HiRISE has done it again!!
Posted By Emily Lakdawalla, 2012/08/06

<<In 2008, Mars Reconnaissance Orbiter snapped
an amazing photo of Phoenix descending
to the surface of Mars under its parachute.

Now it's repeated the feat, with Curiosity.

I think this image pretty much speaks for itself.
Absolutely stunning.>>

http://blogs.nature.com/news/2012/08/mars-orbiter-plans-for-a-curiosity-close-up.html wrote:

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Mars orbiter plans for a Curiosity close-up
by Eric Hand NASA/JPL/Univ. Arizona, 05 Aug 2012

<<The MRO will slew into position and take a snap of Curiosity’s parachutes 60 seconds before landing, just before the rover is released from the back shell. It could even be possible to discern the heat shield on the ground. “We get one shot,” says Alfred McEwen, principal investigator of HiRISE (High Resolution Imaging Science Experiment) at the University of Arizona in Tucson.

This time, the chance of catching Curiosity on camera is only 60%, says McEwen. With Phoenix, there was about an 80% chance. The difference is because of the relative paths of the spacecraft. For the Phoenix landing, HiRISE’s long and narrow field of view was closely aligned with the path of the lander. For the Curiosity landing, the MRO will be much closer and looking almost directly down at Curiosity. But the paths are nearly perpendicular, which means that HiRISE’s field of view — a narrow north–south track about 6 kilometres wide on the ground — might not contain Curiosity, which will be barreling east along its 20-kilometre-long landing ellipse.

There is a silver lining, however. Not only will the MRO be closer, but Curiosity’s parachute is about twice the size of Phoenix’s. In the Phoenix snap, the parachutes were just 10 pixels across. McEwen says that Curiosity’s parachutes could cover 50 pixels, making for a black-and-white image as detailed as 35 centimetres per pixel. And McEwen estimates that there’s a 20% chance Curiosity will fall along the central swath of HiRISE’s field of view, where there are colour detectors. “If we’re really, really lucky we’ll catch it in our colour strip,” he says.

McEwen expects to get the data back to Earth by 1 a.m. Pacific daylight time on 6 August. His team will spend a frantic few hours trying to spot Curiosity and process the image before delivering it to the Jet Propulsion Laboratory (JPL) in Pasadena, California, by 3 a.m. So forget the fish-eyed, fuzzy thumbnails that Curiosity’s hazcams are supposed to return first. By the time of the 9-a.m. press briefing on Monday morning, the JPL could have a beautiful surprise waiting for the public: a memento (hopefully not mori) of the most complicated landing ever attempted in the Solar System.>>