[GTOC 9] - Problem release

[Dario Izzo]

the gtoc9 problem has been released. Find below the text sent to all registered teams. The attachments have been stripped, but

you can get all data from the website (https://kelvins.esa.int/)

Dario Izzo

Dear all,

thanks for participating to the 9th edition of the Global Trajectory

Optimisation Competition. The registration period is now closed. We were 

happy to see so many new teams and institutions taking part to this edition.

In short:

Number of scientists participating: 389

Number of institutions participating: 90

Countries involved: Algeria, Australia, Azerbaijan, Brazil, China, 

Colombia, France, Germany, Greece, India, Italy, Iran, Romania, Russia, 

Slovenia, Singapore, Spain, The Netherlands, United Kingdom, United States

Number of Teams: 67

Find attached to this mail the following files:

1 - gtoc9_problem_statement.pdf: Containing the problem description

2 - gtoc9_list_of_registered_teams.pdf: Containing the list of all teams 

and people registered.

3 - gtoc9-data.zip: Containing the competition data

The web site Kelvins (https://kelvins.esa.int/) is now hosting the

competition web pages. The pages contain, roughly, the same information 

as the files.

Please use the dedicated discussion tab on the website to post questions 

on the problem that can be relevant to all teams, so that the answers 

will be visible to all.

You are all encouraged to interact via the discussion pages. Many teams, 

especially those that do not have a strong Aerospace background or are 

only made by a few members, could benefit greatly in exchanging code / 

ideas etc. in the spirit of an open competition.

I also suggest you to play with the file submission on the first days 

(some example files are provided in gtoc9-data.zip), as to get 

acquainted with its mechanics (delete, trial, validated, submission list 

etc.)

Good luck saving the geosynchronous environment and watch out for the

launcher company pricing!

Dario

[Ingo Althöfer]

Hi Dario,

thanks for the interesting task.

I propose a few points of clarification:
* You should always write "N", avoiding "n" for the same thing.
* You should make more clear that the team is free to choose its N.

Thanks and greets, Ingo.



Zitat von Dario Izzo <dario...@gmail.com>:

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[Dario Izzo]

Ingo,

n is the number of missions. N is the number of debris removed by a
given mission. They indicate different things.

Let me know if there is any misleading text or if I can clarify this
somehow ...

Dario

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[Marcus....@dlr.de]

And n is mean motion :-)

Good Luck all


-----Ursprüngliche Nachricht-----
Von: gtoc_com...@googlegroups.com [mailto:gtoc_com...@googlegroups.com] Im Auftrag von Dario Izzo
Gesendet: Montag, 3. April 2017 11:23
An: gtoc_com...@googlegroups.com
Betreff: Re: Few commments on task formulation

[docdwo]

Hi Dario,

I registered at Kelvins (username drdwo), but I am not able to submit solutions or comment at the discussions there. 

I am Dietmar Wolz from Team 4 (Jena).

It is hard to beat Tsinghua-LAD without being able to submit files. Will be on vacation

from Saturday for several weeks so time is running out for our team. 

Dietmar

[Dario Izzo]

Dietmar,

I need to add the users to the corresponding teams, that is why I asked in the registration mail the list of users. Registering via the web pages is not enough as each user need to be associated to a team.

I now added your user to the Team Jena,

Let me know

Dario

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[docdwo]

Thanks Dario.
If you check the Leader board you see, your addition made quite a difference. 

Unfortunately now I have to quit the competition, will be for some weeks hiking on La Reunion.
All other teams I wish the best. Cheers Dietmar 

[Dario Izzo]

Nice! Have fun and keep following and post on  #GTOC9 :)

--

[docdwo]

In fact I was not able in the short time to work seriously on the task, I just adapted/applied my generic beam search algorithm, picked randomly one of the good solutions and then had to remove some debris from the path because of bugs in the constraint checking during search. There is definitely a lot of room for improvement, but for me it has to wait for after the competition.