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MahFL
Posted on: Jun 27 2018, 02:59 AM


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QUOTE (pandaneko @ Jun 27 2018, 01:37 AM) *
I was watching the final approach of H2 one or two minutes before arriving at the parking position.

H2 was doing something strange as shown below just before arrival at a velocity of 4cm/s, but the velocity
was 3cm/s even after arrival.

P



Well it says 0.00 now.
  Forum: Hayabusa2 · Post Preview: #240096 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 20 2018, 04:31 AM


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QUOTE (Hungry4info @ Jun 20 2018, 03:35 AM) *
We're now less than 100 km from the asteroid, and the asteroid's size should be about 100 pixels in Hayabusa 2's camera.



The approach speed has slowed a lot to 0.28ms, which of course is sensible.
  Forum: Hayabusa2 · Post Preview: #239937 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 19 2018, 04:00 AM


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QUOTE (Floyd @ Jun 18 2018, 08:06 PM) *
Is another image set expected to be released soon? At less than 200 KM the rotational movie would be quite detailed.



A chart in the Jun 14th press release seems to indicate June 20th for a 110 pixel image. Then June 25th for a 400 pixel image.
  Forum: Hayabusa2 · Post Preview: #239912 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 17 2018, 08:49 AM


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QUOTE (nprev @ Jun 17 2018, 06:54 AM) *
Great movie, Roman! smile.gif

What an odd-looking little beast. Markedly different from the regular 'battered potato' look of the smaller asteroids, though we're a long way still from seeing enough of them to say what's 'normal' and what's not in that regard.


You just contradicted yourself...
  Forum: Hayabusa2 · Post Preview: #239873 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 17 2018, 08:44 AM


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QUOTE (mcaplinger @ Jun 16 2018, 11:38 PM) *
No, and it was a bit of an off-the-cuff answer, but barring some additional information from the project it's all we have to go on, and it's not implausible given what details of the design we do know. For example, some types of Q-Tech oscillators really do draw 40 mA just for the oscillator, and then for a complete clock there has to be a counter and maybe some other stuff -- the fault protection paper references a "mission clock FPGA".

I also don't fully understand how the scheduling of transmission and reception periods happens if the mission clock is lost. This seemed to introduce a lot of complexity into the attempted recovery process for Spirit. Presumably without the mission clock there's no way for the rover to figure when 11 LST is (in theory it could do with from solar power production but that would vary a lot based on tau, tilt, dust on the panels, etc.); AFAIK this scenario isn't described in the fault protection paper.


The rover transmits roughly around midday on Mars, so the orbiters listen then. Once the signal is received they can send commands to the rover, which listens periodically, eventually getting back into sync with Earth.
  Forum: Opportunity · Post Preview: #239871 · Replies: 410 · Views: 487226

MahFL
Posted on: Jun 14 2018, 08:59 AM


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QUOTE (mcmcmc @ Jun 14 2018, 08:49 AM) *
Last time I spent hours in copying each slide in google and translating... then the day after they issued the english version.
So I'll wait. :-)


I think quite a few were repeats of info from earlier.
  Forum: Hayabusa2 · Post Preview: #239810 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 14 2018, 08:58 AM


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https://twitter.com/haya2_jaxa

  Forum: Hayabusa2 · Post Preview: #239809 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 14 2018, 08:41 AM


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QUOTE (mcmcmc @ Jun 14 2018, 07:34 AM) *
New press conference held yesterday.
https://www.youtube.com/watch?v=S9nw3bli_Io&t=33s


Presentation in Japanese, lot of veryu interesting info! (Probably English version is coming soon)
http://fanfun.jaxa.jp/jaxatv/files/20180614_hayabusa2.pdf


Google Translate seems to do a good job translating each slide.
One slide says the image of the asteroid is now 10 pixels across, was 3.
  Forum: Hayabusa2 · Post Preview: #239807 · Replies: 983 · Views: 963142

MahFL
Posted on: Jun 13 2018, 10:48 PM


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QUOTE (SpaceListener @ Jun 13 2018, 05:31 PM) *
Are the solar panels able to raise up? I say this when MER traveled thru the space, the solar panels was inside in compact mode before it landed.
During the process of closing (raising) and opening (lowering) solar panels might shake due to the motor vibration or also due to the slope, some
dust will slip down.


The wind blows the panels clean from time to time.
  Forum: Opportunity · Post Preview: #239788 · Replies: 410 · Views: 487226

MahFL
Posted on: Jun 12 2018, 10:39 PM


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QUOTE (Hungry4info @ Jun 12 2018, 04:11 AM) *
It's apparently not as bad over Curiosity's landing site, but the air is noticeably dusty.
Sol 2077 MastCam.



Can only imagine what it's like at Oppy.
  Forum: Opportunity · Post Preview: #239767 · Replies: 410 · Views: 487226

MahFL
Posted on: May 25 2018, 12:53 AM


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QUOTE (propguy @ May 24 2018, 08:00 PM) *
TCM1 was completed 5/22 (yeah!). biggrin.gif Press release at: https://www.jpl.nasa.gov/news/news.php?feature=7138

Can't provide much more data than in the news release but the S/C performance was great and we hit the desired DV well within 1 sigma. Very healthy spacecraft and now we are on a path to Mars! Lots to do in the coming months, but so far a really smooth cruise!



Good to hear.
  Forum: InSight · Post Preview: #239499 · Replies: 129 · Views: 147599

MahFL
Posted on: Apr 10 2018, 10:02 PM


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That's awesome.
  Forum: Chit Chat · Post Preview: #239088 · Replies: 1 · Views: 5517

MahFL
Posted on: Sep 23 2017, 01:32 AM


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QUOTE (Sean @ Sep 15 2017, 05:51 PM) *
I shared Gerald's PJ08 sequence over on Twitter and the 150dpi 11m x 2m image was actually printed out to 8.5m x 1.3m fabric!


That's pretty cool.
  Forum: Juno · Post Preview: #237242 · Replies: 79 · Views: 89615

MahFL
Posted on: Sep 14 2017, 11:47 PM


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Hi all. Watching here. My name is on Cassini smile.gif. My night shift finishes at 6 am so I'll stop up and watch the end. ( I work from home ).

PS I had a cloud free view of the Total Solar Eclipse, was awesome.
  Forum: Cassini's ongoing mission and raw images · Post Preview: #237147 · Replies: 128 · Views: 381268

MahFL
Posted on: May 24 2017, 03:34 AM


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Congratulations, enjoy your retirement !
  Forum: Chit Chat · Post Preview: #235923 · Replies: 17 · Views: 14978

MahFL
Posted on: Apr 27 2017, 08:50 AM


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Awesome.
  Forum: Cassini's ongoing mission and raw images · Post Preview: #235610 · Replies: 128 · Views: 381268

MahFL
Posted on: Apr 26 2017, 04:16 AM


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Less than 150,000 miles out now.
  Forum: Cassini's ongoing mission and raw images · Post Preview: #235601 · Replies: 128 · Views: 381268

MahFL
Posted on: Mar 28 2017, 03:12 AM


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My wife and I are driving up to Columbia, South Carolina ( 4 hour drive ) , we have a room booked.
  Forum: Chit Chat · Post Preview: #235218 · Replies: 36 · Views: 31869

MahFL
Posted on: Feb 1 2017, 11:56 AM


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QUOTE (Sean @ Feb 1 2017, 11:08 AM) *
Ireson Hill from the recent navcams.


How tall is Ireson Hill ?
  Forum: MSL · Post Preview: #234393 · Replies: 1206 · Views: 885304

MahFL
Posted on: Nov 20 2016, 05:05 PM


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Shouldn't the title of the topic be changed to "...attempted Schiaparelli landing" seeing as it was not successful ?
  Forum: ExoMars Program · Post Preview: #233473 · Replies: 177 · Views: 225993

MahFL
Posted on: Aug 27 2016, 09:16 AM


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No NASA TV coverage of the first science pass ?
Inside 200k miles now.
  Forum: Juno · Post Preview: #232336 · Replies: 130 · Views: 149915

MahFL
Posted on: Jul 6 2016, 11:15 AM


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I am surprised how far out Juno is going on these two 53 day orbits.
  Forum: Juno · Post Preview: #231538 · Replies: 130 · Views: 149915

MahFL
Posted on: Jul 5 2016, 02:34 AM


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No sound on NASA TV ?
  Forum: Juno · Post Preview: #231495 · Replies: 71 · Views: 92523

MahFL
Posted on: Mar 14 2016, 01:00 PM


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QUOTE (jamescanvin @ Mar 14 2016, 09:51 AM) *
I have edited the thread title to be about the launch and moved it into the ExoMars subforum.


Second burn is good, two more needed for trajectory insertion towards Mars.
  Forum: ExoMars Program · Post Preview: #229908 · Replies: 7 · Views: 25596

MahFL
Posted on: Jan 6 2016, 08:56 AM


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We need more MM. smile.gif
  Forum: MSL · Post Preview: #228892 · Replies: 349 · Views: 342884

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