FGS
Posted on 01/03/2004 9:33:30 AM PST by bonesmccoy
Mission Timeline: Entry, Descent, and Landing
The entry, descent, and landing (EDL) phase begins when the spacecraft reaches the Mars atmospheric entry interface point (3522.2 kilometers or about 2,113 miles from the center of Mars) and ends with the lander on the surface of Mars in a safe state.
The rovers will arrive during the latter half of the northern winter/southern summer on Mars. Rover A will land at approximately 2:00 p.m. local time on Mars (with Earth set an hour after landing), whereas Rover B will land at around 1:15 p.m. local time on Mars (with Earth set as long as two-and-a-half hours after landing). That means that both rovers will land in the Martian afternoon while the Earth is still in view, allowing the Earth to receive the landing signal if the lander is on the base petal.
Entry, descent, and landing for the Mars Exploration Rover mission is an adaptation of the Mars Pathfinder method:
An aeroshell and a parachute decelerate the lander through the Martian atmosphere.
Prior to surface impact, retro-rockets are fired to slow the lander´s speed of descent, and airbags are inflated to cushion the lander at surface impact.
After its initial impact, the lander bounces along the Martian surface until it rolls to a stop.
The airbags are then deflated and retracted, and the lander petals and rover egress aids are deployed.
Once the petals have opened, the rover deploys its solar arrays, and places the system in a safe state. Communications during entry, descent, and landing will occur through a pair of low-gain antennas, one mounted on the backshell and the other on the rover itself. About 36 ten-second radio tones will be transmitted to Earth during descent through the atmosphere, which takes approximately six minutes. These tones are coded to indicate the accomplishment of critical steps in the entry, descent,and landing timeline. [More on these tones in the communications section]
A step-by-step guide to everything that will happen will be provided prior to entry, descent, and landing.
FGS
I did find this:
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AnchorDesk
Save streaming audio on your PC! Here's how
Preston Gralla
Contributor, AnchorDesk
Friday, June 28, 2002 Add your opinion
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I'm a big fan of Internet radio, and streaming audio of all kinds. There's just one problem with it--once you listen to it, it's gone. Or so I thought.
Recently, I've found software at ZDNet Downloads that lets you save streaming music to your PC. Here are three programs to try.
RipCast Streaming Audio Ripper lets you connect to ShoutCast servers that play streaming audio in several different formats--and then save the audio to your PC as an MP3 file. This program even has the smarts to save each song as a separate MP3, rather than saving them all as a single file. Another bonus: It's free. (Free/Windows)
Super MP3 Recorder can save any audio stream coming into your sound card. It automatically chooses the best recording options, and then saves the stream as an MP3 or WAV file. This download records streaming audio in many formats, including Windows Media Player, QuickTime, RealPlayer, and Flash. (Shareware/Windows)
Real MP3 Recorder can record from a variety of streaming formats, including RealPlayer, Windows Media Player, QuickTime, and streaming MP3. But it always saves the streams as MP3 or WAV files. (Shareware/Windows)
If you're a fan of Internet radio, but have been frustrated because you can't record what you hear, check out these downloads. They'll give streaming media a home on your PC.
Worked for me in preview and both browsers. FR does odd things with pics occasionally. Reload/Refresh???
FGS
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I'm getting a lot of those. I thought my ISP had disabled graphics, but maybe it's a bandwidth problem at NASA.
Linda talks too much.
You were ahead of me getting that remark in the FIRST grade! My SECOND grade teacher wrote the same words about me! (Miss Reagan was an old maid, auburn-haired, w/a bun and grouchy...I still remember her. Ha).
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