Author Topic: JAXA Hayabusa2 Mission : General Thread  (Read 60104 times)

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #260 on: 10/04/2018 03:23 PM »
I don't understand the meaning of a fake video.  :-\

What do you mean?
Second part of the video is just ...first part reversed! look at direction of rotation of Ryugu!

Offline eeergo

Re: JAXA Hayabusa2 Mission : General Thread
« Reply #261 on: 10/04/2018 03:38 PM »
Second part of the video is just ...first part reversed! look at direction of rotation of Ryugu!

It's a GIF looping forward and backwards, in order to give a better sense of continuity, it's not meant to show the full approach and pull-back maneuver, so no need to call it "fake". Also because at the time it was made Hayabusa-2 was still at low altitude, having just released MASCOT!

The author usually makes animations of this kind to give a better intuitive sense of volume and proportions.
-DaviD-

Offline yoichi

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Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #263 on: 10/05/2018 07:31 AM »
Re-entry to "parking altitude" 20.000 meters stopped due to incoming typhoon over Japan!
https://twitter.com/haya2e_jaxa/status/1048104843238367237



Current altitude 18363 m.

« Last Edit: 10/05/2018 07:31 AM by mcgyver »

Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #264 on: 10/05/2018 07:58 AM »
https://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10975/1755_read-30138/#/gallery/32252
Three hops in three asteroid days – MASCOT successfully completes the exploration of the surface of asteroid Ryugu

Offline yoichi

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Offline Svetoslav

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Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #267 on: 10/05/2018 08:24 AM »
MASCOT from HAYABUSA2
« Last Edit: 10/05/2018 08:28 AM by yoichi »

Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #268 on: 10/05/2018 09:15 AM »
« Last Edit: 10/05/2018 01:57 PM by yoichi »

Offline Apollo-phill

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #269 on: 10/05/2018 09:19 AM »
Superb !

Congratulations to ALL the team members on Hayabusa 2 mission .

Thanks yoichi for updates last few days/weeks - really appreciated😃

Phill
UK

Offline jacqmans

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #270 on: 10/05/2018 09:27 AM »
Press release, 5 October 2018


Three hops in three asteroid days – MASCOT successfully completes the exploration of the surface of asteroid Ryugu


- As planned, MASCOT was able to acquire data about the composition and texture of the asteroid at several locations.
- Before the battery depleted, the lander sent all scientific data to the Hayabusa2 mothercraft.
- New images from MASCOT's landing on asteroid Ryugu were presented by DLR, JAXA and CNES today at the International Astronautical Congress (IAC).


It was a day full of exciting moments and a happy team of scientists and engineers: late in the afternoon of 3 October 2018, the German-French lander MASCOT completed its historic exploration of the surface of the asteroid Ryugu at 21:04 CEST, as its
battery ran out. On-asteroid operations were originally scheduled to last 16 hours after separation from the Japanese mothercraft Hayabusa2. But in the end, the battery lasted more than 17 hours. Upon landing in the early morning and subsequently relocating
using the built-in swing arm, all instruments collected detailed data on the composition and nature of the asteroid. The on-board camera provided pictures of the landing, hopping manoeuvres and various locations on the surface.

For MASCOT, the Sun set three times on Ryugu. The lander was commanded and controlled from the MASCOT Control Centre at the German Aerospace Center (Deutsches Zentrum fuer Luft- und Raumfahrt; DLR) in Cologne, in the presence of teams of scientists
from Japan, France and Germany. All scientific data was transferred to the mother probe according to plan.

"With MASCOT, it has been possible to, for the first time, explore the surface of an asteroid directly on site so extensively," says Hansjörg Dittus, DLR Executive Board Member for Space Research and Technology. "A mission like this can only be done
working in close cooperation with international partners – bringing together all their expertise and commitment." With MASCOT, DLR has been working closely with the Japanese space agency JAXA and the French space agency CNES. 

Jumps and a mini-move

MASCOT landed safely on Ryugu in the early morning of 3 October 2018. "After a first automated reorientation hop, it ended up in an unfavourable position. With another manually commanded hopping manoeuvre, we were able to place MASCOT in another favourable
position thanks to the very precisely controlled swing arm," says MASCOT operations manager Christian Krause from DLR. From that position, MASCOT completed a complete measurement sequence with all instruments over one asteroid day and an asteroid night.
"Later, we were able to continue the activities on Ryugu with a special manoeuvre," adds Ralf Jaumann, DLR planetary scientist and scientific director of MASCOT. "With a 'mini-move' we recorded image sequences that will be used to generate stereo images
of the surface once they have been analysed."

During the first manoeuvres, MASCOT moved several metres to the next measuring point. Finally, and seeing that the lander still had battery power left, the researchers dared to make a bigger jump. All in all, MASCOT explored Ryugu for three asteroid
days and two asteroid nights. A day-night cycle on Ryugu lasts about 7 hours and 36 minutes. At 21:04 CEST, communications with Hayabusa2 were interrupted, because of the radio shadow entering with each asteroid rotation. Hayabusa2 is now returning
to its home position, at an altitude of 20 kilometres above the asteroid’s surface.

In addition to the images acquired by the DLR camera MASCAM, a DLR radiometer, a magnetometer from TU Braunschweig and a spectrometer from the Institut d'Astrophysique Spatiale provided a variety of measurements on the temperature, magnetic properties
and the composition of the near-Earth asteroid Ryugu. 

Waiting for the scientific data

MASCOT is now a silent inhabitant of Ryugu. "The evaluation of the valuable data has just begun," says MASCOT project manager Tra-Mi Ho from the DLR Institute of Space Systems. "We will learn a lot about the past of the Solar System and the importance
of near-Earth asteroids like Ryugu. Today, I look forward to the scientific publications that will result from MASCOT and the remarkable Hayabusa2 mission of our Japanese partners." Hayabusa2 played a crucial role in the success of MASCOT. The Japanese
probe brought the lander to the asteroid. Thanks to precise planning and control, the communication links to the lander could be optimally used for data transmission, so that the first pictures were received on the very day of landing. The remaining
scientific data, which was transmitted to Hayabusa2, will be sent to Earth in the coming days. 

« Last Edit: 10/05/2018 09:29 AM by jacqmans »

Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #271 on: 10/05/2018 01:07 PM »
http://www.hayabusa2.jaxa.jp/en/topics/20181005e_MSC_ONC/

Hayabusa2 successfully images MASCOT separating from the spacecraft!

The small asteroid lander, MASCOT, that was developed in Germany and France, was successfully separated from the Hayabusa2 spacecraft on October 3 and delivered safely to the surface of Ryugu. After landing, MASCOT acquired scientific data on the asteroid surface, which was transmitted to the MASCOT team via the spacecraft. Scientific analysis of this data is expected to be performed by the MASCOT team from now onwards.

From the Hayabusa2 spacecraft, we attempted to capture the separated MASCOT using the three optical navigation cameras (ONC-T, ONC-W1, ONC-W2). When the image data was received from the spacecraft, we could confirm that MASCOT appears in images photographed with the ONC-W1 and ONC-W2.

Offline yoichi

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Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #273 on: 10/08/2018 10:38 AM »
Now you can follow H2 moves in realtime graphically:
https://programmi.000webhostapp.com/hayabusa2/simulator/haya2-dates.html
Note that chart is based on LIDAR data, which become unstable and reliable during "parking" at 20 km altitude. Sometimes the chart could "lock" due to wrong data in log file, I'll fix it. Unfortunately the end user can't do anything about it.

Data are extracted from http://haya2now.jp/data/data.json , processed and saved into https://programmi.000webhostapp.com/hayabusa2/simulator/ONC_A-log.txt .

First datum is just grabber script execution date, disregard it;
second datum is value of ONC_A (area in pixel^2 of Ryugu in ONC-W camera);
third value is LIDAR reading in meters;
then there are Generated, Received and Updated dates, in original and converted format.
Last 12 values are "Thruster injection cumulative seconds" as reported in original page http://haya2now.jp/en.html ; currently I don't know how to use them, but in the meantime I store them for possible future use.
Can anybody suggest how to find out where the 12 thrusters are placed on H2?

You can also see graphical log of MASCOT and MINERVA-II-1 missions. Pages are in beta development phase, so be careful:
- don't move the mouse over the images until the page is fully loaded, else you'll get garbage rather than right images...; switch to another tab/page during loading
- no instructions on the pages yet; anyway, hover mouse over single frames to view them enlarged, or hover mouse over the grey strip below the image to "play" the animation
- for some reasons I can't get the MINERVA-II-1 mission in the proper direction (?!?), so the images appear in reverse order, anyway just look at the date under the big image, and just remember that Ryugu rotates from right to left.
MASCOT
MINERVA-II-1

Offline Hungry4info3

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #274 on: 10/09/2018 05:27 AM »
Great site! Minor thing to point out though: The date is off by a month. All the most recent dates are for November, rather than October.

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #275 on: 10/09/2018 10:23 AM »
Great site! Minor thing to point out though: The date is off by a month. All the most recent dates are for November, rather than October.
fixed & improved:
- dates fixed and extended to day and hour
- chart update no more locks up upon missing data in ONC_A-log.txt
- better colour than default reddish...
- bigger chart
- bigger fonts
- added links to data and credits


Now working to improve the realtime simulator before next touchdown rehearsal, just a few days left!




Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #276 on: 10/10/2018 08:34 AM »
press conference
2018/10/11(Thu) 15:30-16:30(JST)
2018/10/11(Thu) 06:30-07:30(UST)

Takashi Kubota(JAXA)
Makoto Yoshikawa(JAXA)

press release
Hayabusa 2's landing will be postponed NET January next year.
new schedule
2018/10/14-15 TD1-R1-A(second touch down rehersal)
2018/10/24-25 TD1-R3 (third touch down rehersal)
NET Jan 2019 TD1 (first touch down)

and MASCOT press conference by DLR
2018/10/12 17:30(JST)-
2018/10/12 08:30(UST)-
« Last Edit: 10/11/2018 07:43 AM by yoichi »

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #277 on: 10/11/2018 07:55 AM »
2018/10/14-15 TD1-R1-A(second touch down rehersal)

I finished (well.. almost) just in time my new simulator:
https://programmi.000webhostapp.com/hayabusa2/simulator/simulator3.html
It should be a little more interesting, now, to follow moves of Hayabusa during its multiple missions. :-)
I'm still working to implement speed in the display and to move the schematic from below to the right, but I don't know if I will be able to do it by  october [size=78%]14th[/size].

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #278 on: 10/11/2018 08:53 AM »
I'm still working to implement speed in the display and to move the schematic from below to the right,
Hayabusa/Ryugu schematic moved to the right, but downsizing it looks a little more tricky than I thought.


Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #279 on: 10/12/2018 06:16 AM »
Just in time for next mission, here it is a fully functional simulator:
https://programmi.000webhostapp.com/hayabusa2/simulator/simulator3.html


Changes:
Added speed to realtime data
Added speed to history chart
Moved/resized ryugu/H2 schematic
Added decimals to rovers images sizes in ONC
(Invisible: added speed data to history log)


Plans for the future:
Add a box with a zoom of the chart on last 72 hours.
Add a box with a zoom of the chart between 0 and 500 meters (or configurable).
Add the schedule for next missions.
Add playback function for previous missions; in the meantime you can use separate pages to perform a replay of MINERVA release mission and MASCOT release mission. Players are still in beta so pay attention not to move mouse over images until they are fully loaded or they will stop loading.



Next missions:
14-15 October: TD1-R1-A (2nd touch down rehearsal)
24-25 October: TD1-R3 (3rd touch down rehearsal)

Next press conferences:
23 October-16:00 JST  (07:00GMT)
8 November - 11:00 JST  (02:00 GMT)
« Last Edit: 10/12/2018 06:16 AM by mcgyver »

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