Profile for dtayls

Name	dtayls
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2020-09-29 00:27:13

Re: Weather - Brain Storm

Board » General Discussion

VIbex: The key to my idea is to use an underlying weather model for the simulation which powers our virtual boats that is different from the predictions available to SOL competitors.

I agree when you say "we're not actually living on the boats so you need some measure of predictability" but I don't think that means we need to be able to 100% predict the weather.

When the weather is very stable and highly predictable then the models will likely be very closely aligned. In those cases it might be safe to sail very close to a mark or an island, but when the weather is less stable you might choose a wider safety margin over absolute performance.

As for the question of using 'rules' to control which models can or can't be used, there is always going to be someone who wants to cheat.

Ideally, I like the idea of using something like a pre-release beta version of the ECMWF model not generally available except to researchers, if such a thing exists. Another alternative might be a psuedo-random merge of multiple model GRIBs ... This could be a fun project
2020-09-27 00:57:45

Re: Weather - Brain Storm

Board » General Discussion

ij said @ 2020-09-10 20:03:13:

Also, they explicitly mention not-for-profits in their license selection guidance so you're just dreaming and there's little point in trying to ask anything from them.
--
i.

Is it possible to get access to the ECMWF model for internal use only on the server while using the GFS model in the gribs provided to users?

It seems to me that this would fit the licencing requirements for the not-for-profit use of the real-time ECMWF data.

It would also be closer to reality in that the underlying model used on the server would be different to the forecasts available to users.

There may also be a need for a new SOL rule that makes it illegal to use commercial paid-for products not available to all users for free.

I think this would make for some more interesting racing.
2020-09-26 12:13:06

Re: AGL14 Releases

Board » Technical Discussion

dtayls said @ 2020-09-07 04:13:07:

14.2.3 doesn't seem to automatically download GRIBs anymore

Looks like this only affected the Mel-to-Osaka race. Seems to work perfectly in other races. How bizarre!
2020-09-26 11:32:29

Merge of steering and DC tabs

Board » General Discussion

I really like @Zorba's idea of merging the 'steering' and 'DC' tabs. Maybe allow for 8-10 lines of DCs bacause if anyone is using more then they are probably using other tools to generate them.

It would also help to be able to set an actual time rather than just a delay period.
2020-09-26 11:26:04

Extended predictors - Suggestion re the hourly indicators

Board » General Discussion

Love the new extended predictors. Thanks @ij.

One small suggestion: Hourly indicators are open circles. Perhaps fill every 6-hourly circle to make a large dot. This would help in interpreting the longer predictors.

The longer predictors will be really helpful when training up those new to SOL. The curly-whirly patterns can be very instructive.
2020-09-07 04:13:07

Re: AGL14 Releases

Board » Technical Discussion

14.2.3 doesn't seem to automatically download GRIBs anymore

This might help explain it:

Exception in thread "Thread-1" java.lang.NullPointerException
at grib.GribFactory.waitForGrib(GribFactory.java:215)
at grib.GribFactory.run(GribFactory.java:146)
at java.base/java.lang.Thread.run(Unknown Source)

--- Last Edited by dtayls at 2020-09-07 04:30:17 ---
2020-04-22 23:11:23

Re: Poetry Saved for Posterity

Board » General Discussion

Pushing haiku to new limits:

Laozi *pokes
bonknhoot
what the *
2020-04-11 08:08:43

Re: DC Checker Releases

Board » Technical Discussion

Version 4.0.0 looks really good.

I had all sorts of problems initially but finally got it all sorted. 1st problem was I was using a 32bit instance of Java. Tried the latest 64 bit SDK but no joy. Updated the JRE (runtime environment) and it worked beautifully.

Thanks Kipper. Everyone will enjoy the updated version.
2017-03-30 00:14:54

Suggestion re: broader logging options

Board » Technical Discussion

Kipper: It would be really useful to be able to log data for all boats or perhaps just those selected for AIS display. Last year psail and I used hmmm's logs to do some post-race analysis on the 2016 Mel-2-Osaka race but unfortunately hmmm's site is no longer available.
2014-11-19 01:38:23

Re: Performance loss

Board » Technical Discussion

There are some really interesting ideas in the pipeline and there is a great team of people working on it. Physical (kinetic) performance loss certainly exists but it's probably not a significant issue in an ocean race. Crew fatigue, on the other hand, is probably much more important. Lots of manoevres (tacks/gybes) will take a big toll on the crew. And doing these in high winds or at night is going to have an even greater impact. So, perhaps double at night; a sliding scale from x1 to x5 from 20 to 50 kts; and a no-go-zone from 50kts+ where you can't tack or gybe at all because the crew is simply refusing to get up on deck.

--- Last Edited by dtayls at 2014-11-19 01:56:30 ---

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