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Old 25-May-2008, 06:37 PM
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Default Phoenix EDL: The Seven Minutes of Terror thread
New page. Time for a repeat of the link farm.

NASA Phoenix Mission
University of Arizona Phoenix Mars Mission
NASA Phoenix Landing Events Schedule
NASA Phoenix Landing Blog
NASA Phoenix Twitter Feed
Emily Lakdawalla, Live Video Chat from JPL: UStream (chat at 13:30 PDT, maybe a second one later)
Planetary Society Weblog: Gearing up for the Phoenix Landing
Planetary Society Weblog: Up-to-the-minute Map of the Phoenix Landing Site
Planetary Society landing site map schematic
Planetary Society landing site image, with ellipses, topography
Planetary Society Phoenix mission topic
Mars Live (A Phoenix Landing Blog) by Doug Ellison et al
Mars Live UStream channel
Phoenix Mars Landing Real-Time Simulation by D Muller
Google Mars landing site
Watch NASA TV

My NASA TV isn't very reliable -- frozen video, then eventually no audio -- but the Yahoo NASA TV source seems OK (and is better quality normally).

From the Phoenix landing events schedule (times PDT, Earth-receive time):
-- Begin non-commentary live television feed from JPL control room, 3 p.m.
-- Begin commentated live television feed from JPL control room, 3:30 p.m.
-- Propulsion system pressurization, 4:16 p.m.
-- Begin "bent-pipe" relay relay (continuous transmission of Phoenix data as it is received) through NASA's Mars Odyssey spacecraft to Goldstone, Calif., Deep Space Network station, 4:38 p.m.
-- Green Bank, W. Va., radio telescope listening for direct UHF from Phoenix, 4:38 p.m.
-- Cruise stage separates, 4:39 p.m.
-- Spacecraft turns to attitude for atmospheric entry, 4:40 p.m.
-- Spacecraft enters atmosphere, 4:46:33 p.m.
-- Likely blackout period as hot plasma surrounds spacecraft, 4:47 through 4:49 p.m.
-- Parachute deploys, 4:50:15 p.m., plus or minus about 13 seconds.
-- Heat shield jettisoned, 4:50:30 p.m., plus or minus about 13 seconds.
-- Legs deploy, 4:50:40 p.m., plus or minus about 13 seconds.
-- Radar activated, 4:51:30 p.m.
-- Lander separates from backshell, 4:53:09 p.m., plus or minus about 46 seconds.
-- Transmission gap during switch to helix antenna 4:53:08 to 4:53:14 p.m.
-- Descent thrusters throttle up, 4:53:12 p.m.
-- Constant-velocity phase starts, 4:53:34 p.m., plus or minus about 46 seconds.
-- Touchdown, 4:53:52 p.m., plus or minus about 46 seconds.
-- Lander radio off 4:54:52 p.m., plus or minus about 46 seconds.
-- Begin opening solar arrays (during radio silence) 5:13 p.m.
-- Begin NASA's Mars Reconnaissance Orbiter playback of Phoenix transmissions recorded during entry, descent and landing, 5:28 p.m. However, data for analysis will not be ready until several hours later.
-- Begin Europe's Mars Express spacecraft playback of Phoenix transmissions recorded during entry, descent and landing, 5:30 p.m. However, data for analysis will not be ready until several hours later.
-- Post-landing poll of subsystem teams about spacecraft status, 5:30 p.m.
-- Mars Odyssey "bent-pipe" relay of transmission from Phoenix, with engineering data and possibly including first images, 6:43 to 7:02 p.m. Data could take up to about 30 additional minutes in pipeline before being accessible. If all goes well, live television feed from control room may show first images as they are received. The first images to be taken after landing will be of solar arrays, to check deployment status.
-- News briefing, 9 p.m.

Landing time (approximate):
Sunday, May 25, 1636 PDT
Sunday, May 25, 1936 EDT
Sunday, May 25, 2336 UTC

Landing time (approximate Earth-receive time):
Sunday, May 25, 1653 PDT
Sunday, May 25, 1953 EDT
Sunday, May 25, 2353 UTC

Edit, 1250 PDT: Replay of pre-landing briefing on NASA TV now.
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Last edited by 01101001 : 25-May-2008 at 07:50 PM.
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Old 25-May-2008, 08:09 PM
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I've created a new thread specifically for this afternoon's events - since it's likely to be lively - and started it off with our binary friend's "link farm."
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Old 25-May-2008, 08:15 PM
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For those who get the Science Channel, it will have live coverage from 7-9 pm EDT.
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Old 25-May-2008, 08:40 PM
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Quote:
Originally Posted by ToSeek View Post
I've created a new thread specifically for this afternoon's events - since it's likely to be lively - and started it off with our binary friend's "link farm."
Cool. We can noisily chat all about the exciting but brief EDL and then toss it away like a... used parachute, and go back to the Phoenix topic for actual operation and news.

Good idea.

Emily Lakdawalla UStream live video chat on now (since 30 minutes after the hour). She's doing furious Q&A.

(Bad Astronomer UStream live video chat, not on Phoenix specifically but surely it will be mentioned, starts on the hour.)
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Old 25-May-2008, 09:00 PM
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Quote:
Originally Posted by 01101001 View Post
Emily Lakdawalla UStream live video chat on now (since 30 minutes after the hour). She's doing furious Q&A.

(Bad Astronomer UStream live video chat, not on Phoenix specifically but surely it will be mentioned, starts on the hour.)
Emily's signed off for now. No next chat scheduled, but she's hopeful of doing more from JPL.

BA sounds like he's on.
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Old 25-May-2008, 09:16 PM
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Mars Live UK UStream video chat back on the air.
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Old 25-May-2008, 09:35 PM
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Default Numbers

Date and Time (Orbiter UTC) Range (km) Range-rate (km/s) Velocity (km/s)
2008-May-25 14:30:23 100000 -2.810391 2.816963
2008-May-25 15:29:32 90000 -2.825741 2.833808
2008-May-25 16:28:20 80000 -2.844586 2.854726
2008-May-25 17:26:41 70000 -2.868262 2.881389
2008-May-25 18:24:30 60000 -2.898901 2.916567
2008-May-25 19:21:37 50000 -2.940065 2.965119
2008-May-25 20:17:47 40000 -2.998173 3.036480
2008-May-25 21:12:38 30000 -3.085947 3.151831
2008-May-25 22:05:31 20000 -3.230620 3.370682
2008-May-25 22:55:26 10000 -3.456405 3.955545



Date and Time (Orbiter UTC) Altitude (km) Range-rate (km/s)
2008-May-25 22:38:53 10000 -3.378246
2008-May-25 22:43:48 9000 -3.403316
2008-May-25 22:48:41 8000 -3.427561
2008-May-25 22:53:32 7000 -3.449220
2008-May-25 22:58:21 6000 -3.465084
2008-May-25 23:03:09 5000 -3.469191
2008-May-25 23:07:58 4000 -3.449630
2008-May-25 23:12:50 3000 -3.381065
2008-May-25 23:17:53 2000 -3.201512
2008-May-25 23:23:26 1000 -2.725113
2008-May-25 23:24:04 900 -2.639860
2008-May-25 23:24:42 800 -2.546274
2008-May-25 23:25:22 700 -2.438113
2008-May-25 23:26:04 600 -2.313192
2008-May-25 23:26:49 500 -2.165681
2008-May-25 23:27:37 400 -1.992005
2008-May-25 23:28:30 300 -1.780052
2008-May-25 23:29:31 200 -1.509818
2008-May-25 23:31:13 atmosphere entry begins


Ground UTC - Orbiter UTC = 15m20s
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Old 25-May-2008, 09:49 PM
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One thing I forgot to mention before:

EAT PEANUTS!
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Old 25-May-2008, 09:57 PM
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Quote:
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EAT PEANUTS!
Got 3 pounds.

International Herald Tribune

Quote:
In keeping with tradition, JPL project manager Barry Goldstein plans to hand out bags of peanuts — both salted and unsalted — to his team members on landing day. Over the years, JPL found that missions with the lucky charms have better success than those without.

"I don't tempt fate," Goldstein said during a tour of mission control.
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Old 25-May-2008, 10:12 PM
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Watch NASA TV

Yahoo NASA TV alternate source

NASA TV Phoenix coverage (control room cameras, no commentary) began on the hour.

BA live chat is over.
First session Emily Lakdawalla live chat is over; there may be more, later.

NASA Phoenix: Mars pulls Phoenix in

Quote:
NASA's Phoenix Mars Lander sped on Sunday morning toward its arrival at Mars, as the tug of the Red Planet's gravity accelerated the craft during the final day of its trip from Earth to Mars.

"Mars is literally pulling on our spacecraft, and at the same time it is pulling on our emotions," Phoenix Principal Investigator Peter Smith, of the University of Arizona, Tucson, said early Sunday afternoon. "We are excited at how close we are right now to beginning our study of a site where Martian water ice will be within our reach, after all these years of preparations. Our science mission begins as the spacecraft settles into its new home on Mars."

The spacecraft's speed relative to Mars increased from 6,300 miles per hour at 8:30 a.m. Pacific Time to 8,500 mph at 12:30 p.m., headed for a speed higher than 12,000 mph before reaching the top of the Martian atmosphere.

Phoenix was on track for anticipated entry into the atmosphere at 4:30p.m. Pacific Time and reaching the surface at 4:38 p.m., although confirmation of those events comes no sooner than 15 minutes, 20 seconds later, due to the time needed for radio signals to travel from Mars to Earth.
Landing time (approximate):
Sunday, May 25, 1638 PDT
Sunday, May 25, 1938 EDT
Sunday, May 25, 2338 UTC

Landing time (approximate Earth-receive time):
Sunday, May 25, 1653 PDT
Sunday, May 25, 1953 EDT
Sunday, May 25, 2353 UTC

Edit, 23 minutes past the hour: 90 minutes until we know
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Old 25-May-2008, 10:28 PM
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Phoenix Almost There: landing ellipse, topo map



Quote:
NASA's Phoenix Mars Lander is targeted to land in a flat valley in the arctic plains of Mars, at the center of the blue ellipse shown here. It is most likely to touch down at the very center, and least likely to land at the ellipse's edges. The ellipse is approximately 60 kilometers (37 miles) long and 20 kilometers (12 miles) wide.
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Old 25-May-2008, 10:30 PM
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Watch NASA TV

Yahoo NASA TV alternate source

NASA TV Phoenix coverage, with commentary, should begin.
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Old 25-May-2008, 10:53 PM
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Default 45 minutes to landing on Mars
Coming up, from the Phoenix landing events schedule (times PDT, Earth-receive time):
-- Propulsion system pressurization, 4:16 p.m.
-- Begin "bent-pipe" relay relay (continuous transmission of Phoenix data as it is received) through NASA's Mars Odyssey spacecraft to Goldstone, Calif., Deep Space Network station, 4:38 p.m.

Landing time (approximate):
Sunday, May 25, 1638 PDT
Sunday, May 25, 1938 EDT
Sunday, May 25, 2338 UTC

Landing time (approximate Earth-receive time):
Sunday, May 25, 1653 PDT
Sunday, May 25, 1953 EDT
Sunday, May 25, 2353 UTC

45 minutes to landing on Mars
1 hour to knowing about landing, Earth-receive time
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Old 25-May-2008, 10:59 PM
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D Muller Phoenix Mars Landing Real-Time Simulation:
Now passing Phobos orbit at Mars.

30 minutes to entry interface at Mars
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Old 25-May-2008, 11:08 PM
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Default 30 minutes to landing on Mars
30 minutes to landing on Mars
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Old 25-May-2008, 11:10 PM
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Got 3 pounds.
I ate some, but I had to get it from stuff my wife puts in the bird feeders.
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Old 25-May-2008, 11:11 PM
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Science Channel coverage has started. Someone noted that this is the first time that a space probe will contact water ice on the surface of another world.
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Old 25-May-2008, 11:14 PM
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MRO has successfully slewed to a position to communicate with Phoenix.
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Old 25-May-2008, 11:15 PM
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