I think information on training will be of interest to forum members. My translation will follow for the few pages
on training as follows.

P

Page 16:

Operation training

・LSS(Landing Site Selection) training

Aim: Find out, from technically and scientifically meaningful viewpoint, if our limited resources inluding time
can actually land the mother ship and rovers onto the asteroid surface.　

・IRIO (Real-time Integrated Operation) training:

Use of simulator for landing and proximity operations in critical situation in real time to increase proficiciency
of operation members.

Page 17:

ＲＩＯ training objectives:

We want to increase the operational proficiency of operating members by giving them advance trainings
in order to reduce risk and increase success probability in critical mission phase.

* Operator training for special phases such as descending towards the ground surface.
* Confirming on-site actions in nominal cases in critical operations　　
* Tool operators skill increase in use of tools such as GCP-NAV
* Monitoring of contingency cases and reactions　　
* Operators readiness for emergencies　
* Team integration/building by JAXA and manufacturers members　
* Verification and confirmation of ground tools

1. Interface confirmation

2. Exracting areas for further improvements in tools
GCP-NAV: Ground Control Point Navigation

3. Feedback into real operation
3.1 Identification of improvements in operation manual
3.2 Brushing up of contingency plan in navigation control and guidance

GNC: Guidance Navigation and Control

P

Page 18

Types of RIO training

A: TRIO(RIO training dry run inside JAXA
Franework/contents/date of training

* Dry-run 1 (10 times)/

Training within JAXA by making use of hardware simulator(HIL)verification procedures/ January to June 2017

* Dry-run 2 (10 times)/

Training within JAXA by making use of image feedback functions with image generator/ July 2017- May 2018

B: RIO (actual realtime training)

Franework/contents/date of training

Session 1: October to December 2017
Session 2: January to May 2018

* Small scale training (3 times)
Training for GNC related tools in critical operation

* Middle scale training (11 times)
Training for specific imaginary cases in critical operation

* Large scale training (9 times)
24 hour non-stop operation for all major phases in descending operation

Total number of training sessions 43. Further 4 trainings are planned before May 2018 (total: 47 training
sessions)

P

Having translated this document so far I am no longer sure exactly what they are doing.

What I can say for sure is that page 19 is dedicated to computer generated imaginary Ryugu pictures called
Ryugoroid.

Page 20 is a complicated chart and I am not going to spend time on translating it, but I will come to that
in a moment after what follows. This is the translation of page 21, most notable statment on that page.

Page 21:

ＧＣＰ-ＮＡＶ:

Feedback control from the ground station using generated images.

Pre-genarated asteroid model (database of outer shape and specific points) is compared/matched with
the real images from Hayabusa, thereby estimating the position of Hayabusa to send control signals.

It seems to me that position of Hayabusa is the utmostimportance to JAXA. I do not understand it,
but back to page 20's chart. Here at the bottom right is an image generator. Frurther to the left are screens.

My current guess is that interactively generated and corrected images (owing to the real images from Hayabusa)
are fed into the screen we are watching. So, what we see on the display window may not be the real thing, but
very close to real asteroid.

What do I mean by that...?

P

Your effort is very appreciated, but I presume we'll get the official English version of the PDF within 24 hours, as already happened 2 times.

But I can't find a page listing all the available PDFs, both in english and japanese, does it exist?

I have annotated parts of the chart on page 20, but unsure if this will go up as it may be a little large.

It represents the simulator.

In case it does, the big chunk in green dotted square is the electrical Hayabusa

The square at the bottom left contains various monitors, which includes the image monitor they are watching
and my guess is that it is the same display monitor that we can watch.

Image generator perhaps has a built-in database of the asteroid called Ryugoid, I think.

Why cannot they simply show us real images? Is it that difficult to do that?

P

I forgot to upload my annotation.

Yes, its size is just below the limit.

P

Official images from latest press release (june 21):
http://www.hayabusa2.jaxa.jp/topics/20180621je/index_e.html

------------



When ready, English press release should be listed here:
http://www.hayabusa2.jaxa.jp/topics/press/
This COULD be its link:
http://www.hayabusa2.jaxa.jp/topics/press/...ss20180621e.pdf
or
http://global.jaxa.jp/projects/sat/hayabus...ss20180621e.pdf



List of previous press release I was able to find:


Japanese:
http://fanfun.jaxa.jp/jaxatv/files/20150128_hayabusa2.pdf
http://fanfun.jaxa.jp/jaxatv/files/20170712_hayabusa2.pdf
http://fanfun.jaxa.jp/jaxatv/files/20171214_hayabusa2.pdf
http://fanfun.jaxa.jp/jaxatv/files/20180419_hayabusa2.pdf
http://fanfun.jaxa.jp/jaxatv/files/20180607_hayabusa2.pdf
http://fanfun.jaxa.jp/jaxatv/files/20180614_hayabusa2.pdf
http://fanfun.jaxa.jp/jaxatv/files/20180621_hayabusa2.pdf


English:
http://www.hayabusa2.jaxa.jp/topics/press/...ss20180607e.pdf
http://www.hayabusa2.jaxa.jp/topics/press/...ss20180614e.pdf


http://global.jaxa.jp/projects/sat/hayabus...ss20180607e.pdf
http://global.jaxa.jp/projects/sat/hayabus...ss20180614e.pdf

I am no longer sure about JAXA documents. It seems to me that there are 2 versions of
the same (or very similar) documents dated with the same date of 19 April 2018. With one
of them (or perhaps both) an English version already exists?

19 April is long time ago...

I am also unsure about your question. Do you mean a catalogue of JAXA documents?

P

From the images released today, it looks like a more spherical version of Itokawa, but still a remarkable rubble pile with only a few, subdued craters

Did you see the comparison to all other minor bodies photographed in the past, listed in the press release?

Stereo views. First an anaglyph version:
Click to view attachment
And a cross-eyed version:
Click to view attachment

Click to view attachment

animation of the last 3 images

I am still mildly desperate for clarification about the wide angle camera window on Haya2 web page.

So, I rang JAXA publicity department this morning. I will be getting their reply on my mobile. Apparently,
the girl who picked up my call will have to sk other people for an answer. She was OK, though, so, I think
I will receive a call from JAXA, sooner or later.

P

Are you Japanese native speaker? I thought the doubt about the content and meaning of the "control panel" was caused by difficulties in automated translation from Japanese to English.

Although not yet officially stated by JAXA, H2 should have performed TCM07 this GMT-night, slowing down from 29 to 9 cm/s:
58291.013888 2018/06/22T00:20:00.0 0.3594 0.2688 46.1378 0.010988 -0.003875 -0.299525
58291.020833 2018/06/22T00:30:00.0 0.3660 0.2664 45.9581 -0.002735 -0.000503 -0.091445

It is... parking. :-)

Resolution is now around 4.5 m/pixel
Ryugu is 206 pixel wide in ONC-Telescope camera and 20 pixel wide in ONC-WideAngle camera.

No evidence yet of english version of press release :-( , which should be listed here:
http://www.hayabusa2.jaxa.jp/topics/press/

TCM07 confirmed:
https://twitter.com/haya2e_jaxa/status/1010032948697956352

Simulator data updated on 22/june (data changed from 2018/06/21T21:00:00 on)

TCM 07
Planned:
58291,013888 2018/06/22T00:20:00,0 0,0525 0,3668 45,9209 0,023751 -0,010678 -0,403516
58291,020833 2018/06/22T00:30:00,0 0,0668 0,3604 45,6787 0,000331 -0,001437 -0,090479

Recorded:
58291,013888 2018/06/22T00:20:00,0 -0,3501 0,4541 45,4999 0,021609 -0,010424 -0,403845
58291,020833 2018/06/22T00:30:00,0 -0,3371 0,4478 45,2575 0,001738 -0,001377 -0,088814

TCM08
Previous schedule:
58293,013888 2018/06/24T00:20:00,0 0,1110 0,0421 27,2645 0,000560 -0,002306 -0,125539
58293,020833 2018/06/24T00:30:00,0 0,1114 0,0407 27,1891 0,002246 -0,000111 -0,011788

Actual schedule:
58293,013888 2018/06/24T00:20:00,0 -0,0541 0,1376 27,1238 0,001939 -0,002281 -0,123958
58293,020833 2018/06/24T00:30:00,0 -0,0529 0,1363 27,0494 0,002306 -0,000590 -0,010717

TCM09
Previous schedule:
58295,041666 2018/06/26T01:00:00,0 0,0003 -0,0002 20,9940 -0,002923 -0,000412 -0,061517
58295,048611 2018/06/26T01:10:00,0 -0,0015 -0,0004 20,9570 0,001754 0,000019 0,003058

Actual schedule:
58295,041666 2018/06/26T01:00:00,0 -0,1474 0,0071 21,0297 -0,002772 -0,000935 -0,060524
58295,048611 2018/06/26T01:10:00,0 -0,1491 0,0066 20,9933 0,003461 -0,000058 0,002575

Arrival
Previous schedule:
58296,013888 2018/06/27T00:20:00,0 0,0009 0,0000 20,0156 -0,001530 -0,000025 -0,025922
58296,020833 2018/06/27T00:30:00,0 0,0000 -0,0000 20,0000 0,000038 0,000000 0,000323

Actual schedule:
58296,013888 2018/06/27T00:20:00,0 -0,0001 0,0001 20,0159 0,000256 -0,000114 -0,026314
58296,020833 2018/06/27T00:30:00,0 0,0000 -0,0000 20,0000 0,000038 0,000000 0,000323

Yes, I am. I still have not received an answer from JAXA. My question to them this morning was about the
fixed caption with the wide angle camera window. Until yesterday I had been distracted by the pop-up caption,
but I realised that the fixed caption is also strange. It is the character string right below ONC-W1.

It reads, word to word, "navigation abbreviated schematic". I explained to the publicity girl that lay people like
me would expect to see camara captured image on this window, not man-made something. She very well
understood what I was yapping about.

I think I will ring them next Monday again.

P

Animation of 2 processed images (14 + 15)
Click to view attachment

Google Translate is notoriously crap going between Japanese and English. I can't believe JAXA PR would release something without checking and editing it first.

Editing aside, there may be a point here. I myself want to see Ryugu pictures any time I want, without relying on
irregular press release of Ryugu photos. I therefore have been trying to believe that ONC-W1 window on HAYA2 is
an ideal tool to suit my own desire.

JAXA, on the other hand, may have good reasons not wanting to release real images on this window.
I do not know what these reasons are, for carrying schematics, or simplified something of Ryugu.

I realise also that the dot which has been seen on the upper left corner of this window has gone, in fact the
whole window has been switched off.

As somebody mentioned before schematics may even have more information that simple images? It all remains
to be seen...

P

I have noticed something else, watching the Haya2 control panel.

At each ground station H2 position is specified by elevation and longtitude. Longtitudinal angle change is OK,
angular velocity at different latitudes, faster in Canberra than at stations in Japan, but elevetion also does
change. Should it? Of course, much slower than longitudinal changes, but elevation does seems to change by
the look of it...

Is the earth wobbling?

P

They are definitely in Ryugu's sphere of influence... the last maneouevre brought the velocity to 9 cm per second, and over the last day or so it accelerated to 10 and now 11 cm/s. That has to be the asteroid's gravity giving a slight speed boost, right?

If my math is right, assuming a radius of 450 metres, Ryugu needs a density of at least ~0.26 g cm^-3 to have a Hill sphere out to Hayabusa 2's distance. So that sounds plausible.

Edit: Apparently that's what the mission team thinks too.
https://twitter.com/haya2_jaxa/status/1009368813429592064

There is also acceleration due to solar radiation pressure which has to be accounted for.
Other effects (like Coriolis force and gravity of other bodies) should be negligible or not relevant at this point.

TCM08 confirmed but different from planned:

https://twitter.com/haya2e_jaxa/status/1010759732515098625

Planned:
58293,013888 2018/06/24T00:20:00,0 -0,0541 0,1376 27,1238 0,001939 -0,002281 -0,123958
58293,020833 2018/06/24T00:30:00,0 -0,0529 0,1363 27,0494 0,002306 -0,000590 -0,010717

Actual:
58293.018055 2018/06/24T00:26:00.0 -0.1998 0.2395 38.3500 0.002254 -0.002601 -0.106281
58293.025000 2018/06/24T00:36:00.0 -0.1991 0.2386 38.2940 0.000540 -0.000687 -0.084732

Hence, new TCM added on 26/6:
58295.045833 2018/06/26T01:06:00.0 -0.1652 0.0514 21.0219 0.000191 -0.001503 -0.114487
58295.052777 2018/06/26T01:16:00.0 -0.1638 0.0508 20.9933 0.003624 -0.000580 -0.003281


Final TCM on 27/7 as planned:
58296.018055 2018/06/27T00:26:00.0 -0.0001 0.0002 20.0049 0.000394 -0.000642 -0.020535
58296.025000 2018/06/27T00:36:00.0 0.0000 -0.0000 20.0001 0.000022 0.000000 0.000111


(but actually after TCM08bis the speed will bealready just 3 mm/s)


No new images yet.
No English translation of latest press release yet:
http://www.hayabusa2.jaxa.jp/topics/press/

I hesitate to add what follows, but just in case....

P

What is going to happen after Hayabusa flies down to next orbits (5km and 1km):

Yes but there is another one dated 21/6!
http://fanfun.jaxa.jp/jaxatv/files/20180621_hayabusa2.pdf
Only in Japanese! :-(

Possible places for press releases:

http://global.jaxa.jp/projects/sat/hayabusa2/pdf/
http://fanfun.jaxa.jp/jaxatv/files/
http://www.hayabusa2.jaxa.jp/topics/press/doc/

Not browsable, but just add filename to download it:
Japanese:
20150128_hayabusa2.pdf
20170712_hayabusa2.pdf
20171214_hayabusa2.pdf
20180419_hayabusa2.pdf
20180607_hayabusa2.pdf
20180614_hayabusa2.pdf
20180621_hayabusa2.pdf


English:

Hayabusa2_Press20180607e.pdf
Hayabusa2_Press20180614e.pdf
Hayabusa2_Press20180621e.pdf <<-- Where is it?!?

My guess is as follows. This document in Japanese dated 21 June does exist somewhere, but not yet archived. I dug into this FANFAN site
and what follows is its URL.

http://fanfun.jaxa.jp/countdown/hayabusa2/

and towards the end of all this you will see what is below. The latest that they carry here is not 21, but 14 June. So, although 21 June
document exist on somebody's disk, but it has not been properly integrated into their listing database, let alone an English version.
An English version may or may not exist. If it does exists it has not been listed properly on tbis FANFAN web site. That is my guess.

P

40km image, yes, lots and lots of craters. It must have been quite violent...

P

here is english version: http://www.hayabusa2.jaxa.jp/topics/20180625je/index_e.html

First ONC-Wide photo!


We are just 27 km high now.

Original, non-zoomed image (256x256):

Each pixel is around 3.8-3.9 meters, so smaller boulders are as big as your house, more or less.

No, this is no longer a puff fish. It very much looks like a pomegranate in my garden!

P

I found the press release on youtube (or bto be honest: YT made me find it)
https://www.youtube.com/watch?v=tclBmsIh2yo
Although I don't understnd anything, you can see the animated version of one of the slides in the presentation posted above, the simulated formation process. Q&A begins at about min. 20.

@mcmcmc, where did you find that nice explosion gif, or is that yours?

I did the GIF by myself, using Trimble Sketchup 2017, SUalive plugin and the model downloaded from http://www.asahi.com/special/rocket/hayabu...ayabusa.obj.txt (rename to .obj), converted into .DAE format for import with texture in Sketchup (converted using Meshlab os Meshmixer or Netfabb, I don't remember which one eventually worked without errors).
But you have to manually download the associated MTL file and the textures listed there.
I'd like to redistribute the zip... but DeAgostini Japan is selling the buildable model for around 600$ and maybe they wouldn't like somebody to redistribute the 3d digital model...

Any speculation yet on the bright spot on the top? (north?) Exposed water ice seems unlikely at this distance from the sun! Maybe carbonates?

I dont't get the connection.

Remember this object has very low albedo, so a "bright" spot could still be quite dark in absolute terms. For instance a chunk of lunar mare basalt would probably look bright if transported to Ryugu. To me it looks like a large boulder sitting at the pole- whether the higher albedo is due to exotic composition or just the exposure of a fresh, unweathered, rockface remains to be seen.

John

I was thinking of salt deposits, like those found in Occator crater on Ceres. I doubt, though, that such a small body as Ryugu would be geologically differentiated, so as to permit this.

I am neither a chemist nor a geologist, but I think carbonates would require liquid water to form.
on the subject of the number of craters, on the latest image I can count only one bona fide crater, plus 3 or 4 suspect circular features, possibly subdued craters.

If Ryugu turns out to be a fragment (or collection of fragments) from a larger body then water alteration processes might still have played a part in the history of it's rocks.

I'm very dubious about any supposedly bright spots on Ryugu. John mentioned just an unweathered rock face, which I agree with, and don't forget that in the low resolution images where the big rock first appeared, most pixels covered areas containing both sunlit and shadowed areas, so they look darker anyway. A rock big enough to have a completely unshadowed face might contain the only pixel or two with absolutely no shadows.

Phil

Not sure I agree about the shadows- the polar boulder (or whatever) was definitely brighter than the subsolar point when fully illuminated, and the subsolar point should also be shadow-free at the resolution of those approach images, especially at this low phase angle. Anyway, we'll know soon enough.

A very rough surface like this (thinking of high resolution images of Hayabusa, piles of loose rock fragments) will have shadows even at the sub-solar point if not seen at zero phase angle.

Phil

Hi,

Does any of Hayabusa's minilanders/minirobots have camera onboard, so it can send some nice pictures from the surface?

Thanks in adv. for any info.