Author Topic: LIVE: New Horizons Pluto FlyBy - July 14, 2015  (Read 111952 times)

Offline spacetraveler

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #180 on: 07/14/2015 08:22 PM »
Now transmitting the first data and images back to earth. Hope we hear it soon!

Online ugordan

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #181 on: 07/14/2015 08:26 PM »
Now transmitting the first data and images back to earth. Hope we hear it soon!

No images, only a 20 min burst of telemetry on spacecraft health.

Offline nadreck

Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #182 on: 07/14/2015 08:30 PM »
Now transmitting the first data and images back to earth. Hope we hear it soon!

No images, only a 20 min burst of telemetry on spacecraft health.

1.2megabits and no pictures?  When do they start sending the flyby data?
It is all well and good to quote those things that made it past your confirmation bias that other people wrote, but this is a discussion board damnit! Let us know what you think! And why!

Offline AJA

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #183 on: 07/14/2015 08:31 PM »
Now transmitting the first data and images back to earth. Hope we hear it soon!

In about 15 minutes, New Horizons will be sending out its "hello i am alive" signal,  to arrive at earth ~4.5 hours later.

There's still a while to go, but the guys at the DSN really don't want to slew away from NH :D

Online ugordan

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #184 on: 07/14/2015 08:32 PM »
1.2megabits and no pictures?  When do they start sending the flyby data?

Where ever did you pull 1.2 megabits from? It's more like 1000 bits/s, highest attainable rate 4000 bits/s. They're not wasting time downlinking images at that rate because there's still good science to be had at Pluto system.

I suggest everyone go and read Emily Lakdawalla's excellent writeup on what to expect and when: http://www.planetary.org/blogs/emily-lakdawalla/2015/06240556-what-to-expect-new-horizons-pluto.html

For those of you who just can't be bothered...

Quote
Wednesday, July 15 at 10:59 UT / 06:59 ET / 03:59 PT: 1.5hr downlink: First Look A

    LORRI Charon at 2.3 km/pix (~520 pixels across disk). Taken 2015-07-14 02:41:49. Range 466,000 km. - The best single-frame photo of Charon that will be available during encounter period
    LORRI Pluto at 3.9 km/pix (~615 pixels across disk). Taken 2015-07-13 20:02:43. Range 778,000 km. - Will make a stereo view with the one downlinked in E-Health 1
    LORRI Hydra at 3.2 km/pix (~10x18 pixels across disk). Taken 2015-07-13 23:16:11. Range 645,000 km.
« Last Edit: 07/14/2015 08:34 PM by ugordan »

Offline nadreck

Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #185 on: 07/14/2015 08:33 PM »
1.2megabits and no pictures?  When do they start sending the flyby data?

Where ever did you pull 1.2 megabits from? It's more like 1000 bits/s, highest attainable rate 4000 bits/s. They're not wasting time downlinking images at that rate because there's still good science to be had at Pluto system.

20 minutes of telemetry at 1000 bit/s = 1.2 megabits
It is all well and good to quote those things that made it past your confirmation bias that other people wrote, but this is a discussion board damnit! Let us know what you think! And why!

Offline Mongo62

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #186 on: 07/14/2015 08:34 PM »
1.2megabits and no pictures?  When do they start sending the flyby data?

Where ever did you pull 1.2 megabits from? It's more like 1000 bits/s, highest attainable rate 4000 bits/s. They're not wasting time downlinking images at that rate because there's still good science to be had at Pluto system.

20 minutes times 60 seconds times 1000 bits/s = 1.2 megabits.

Offline NovaSilisko

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #187 on: 07/14/2015 08:35 PM »
For the record, 1.2 megabits is 150 kilobytes. That's maybe one extremely-shrunken image. LORRI images are around 20 kb each, although that's in cases where most of the frame is black. Full imagery from up-close will certainly be much larger.
« Last Edit: 07/14/2015 08:37 PM by NovaSilisko »

Online ugordan

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #188 on: 07/14/2015 08:36 PM »
1.2 megabits is 150 kilobytes, how many 1024x1024 images do you expect they can cram into that?

Offline nadreck

Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #189 on: 07/14/2015 08:36 PM »
1.2megabits and no pictures?  When do they start sending the flyby data?

Where ever did you pull 1.2 megabits from? It's more like 1000 bits/s, highest attainable rate 4000 bits/s. They're not wasting time downlinking images at that rate because there's still good science to be had at Pluto system.

I suggest everyone go and read Emily Lakdawalla's excellent writeup on what to expect and when: http://www.planetary.org/blogs/emily-lakdawalla/2015/06240556-what-to-expect-new-horizons-pluto.html

For those of you who just can't be bothered...

Quote
Wednesday, July 15 at 10:59 UT / 06:59 ET / 03:59 PT: 1.5hr downlink: First Look A

    LORRI Charon at 2.3 km/pix (~520 pixels across disk). Taken 2015-07-14 02:41:49. Range 466,000 km. - The best single-frame photo of Charon that will be available during encounter period
    LORRI Pluto at 3.9 km/pix (~615 pixels across disk). Taken 2015-07-13 20:02:43. Range 778,000 km. - Will make a stereo view with the one downlinked in E-Health 1
    LORRI Hydra at 3.2 km/pix (~10x18 pixels across disk). Taken 2015-07-13 23:16:11. Range 645,000 km.
But that looks like it is happening within the first 20 minutes!

EDIT: OOPS wrong date - "I am just an egg" still thanks for answering with a time, even if it is a disappointing one. Though once I know that NH 'phoned home' on time I will stop biting my finger nails, hopefully before I get to my elbows.
« Last Edit: 07/14/2015 08:42 PM by nadreck »
It is all well and good to quote those things that made it past your confirmation bias that other people wrote, but this is a discussion board damnit! Let us know what you think! And why!

Offline nadreck

Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #190 on: 07/14/2015 08:37 PM »
1.2 megabits is 150 kilobytes, how many 1024x1024 images do you expect they can cram into that?
2 with high compression, 1 with moderate compression
It is all well and good to quote those things that made it past your confirmation bias that other people wrote, but this is a discussion board damnit! Let us know what you think! And why!

Offline NovaSilisko

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #191 on: 07/14/2015 08:40 PM »
Patience... even one image is going to take a significant chunk out of how much telemetry they can send down. Learning everything possible about the spacecraft's health is more important. The images are safe. If the spacecraft is dead, it doesn't matter anyway.

Online ugordan

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #192 on: 07/14/2015 08:40 PM »
1.2 megabits is 150 kilobytes, how many 1024x1024 images do you expect they can cram into that?
2 with high compression, 1 with moderate compression

And you throw away all knowledge of the spacecraft health, whether it actually successfully concluded all the observations, just for that instant gratification.

Online ugordan

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #193 on: 07/14/2015 08:41 PM »
If the spacecraft is dead, it doesn't matter anyway.

Precisely.

Just to get it straight, the first couple of images will be downlinked starting in about 14 hours from now, but they likely won't be released until the press briefing 22 hours from now. Exercise patience, everyone. The highest priority is confirming the spacecraft is healthy and in an expected state.
« Last Edit: 07/14/2015 08:46 PM by ugordan »

Offline Chris Bergin

Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #194 on: 07/14/2015 08:52 PM »
Keep it on updates guys. We have other threads for discussion. It's me that gets it in the ear when people get e-mail notifications of an update and see it's chatter (which this post now is). Always the folk who should know better too.

Offline Targeteer

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #195 on: 07/15/2015 12:07 AM »
Looks like Madrid is ready to receive the "phone home call" with two dishes--including the big one--ready to answer.
« Last Edit: 07/15/2015 12:08 AM by Targeteer »
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Targeteer

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #196 on: 07/15/2015 12:25 AM »
NASA TV coverage in 5 minutes
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Targeteer

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #197 on: 07/15/2015 12:29 AM »
two minutes
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline robertross

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #198 on: 07/15/2015 12:31 AM »
NASA coverage opens with Stephen Hawking offering his congratulations
Remembering those who made the ultimate sacrifice for our rights & freedoms, and for those injured, visible or otherwise, in that fight.

Offline Targeteer

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Re: LIVE: New Horizons Pluto FlyBy - July 14, 2015
« Reply #199 on: 07/15/2015 12:33 AM »
graphics indicate the big dish is sending or receiving something
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

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