Bug in wind speed behavior (offline)

Bugs in DSJ4.
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Risto Salonen
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Posts: 159
Joined: 27 Jan 2007, 18:21
Location: Finland

Bug in wind speed behavior (offline)

Post by Risto Salonen »

According to a recent discussion with Jussi, wind speed should not depend on what time of day a race takes place. I quickly collected some data on this and there's a clear dependence: wind speeds are notably stronger at night. Therefore this is a bug, albeit not a major one.

NIGHT classification: lights switched on

DAY
Average wind speed (estimated, from 15 cases): 0.72 m/s
Highest avg: 1.5 m/s
Lowest avg: 0.3 m/s

NIGHT
Average wind speed (estimated, from 15 cases): 1.68 m/s
Highest avg: 2.1 m/s
Lowest avg: 1.4 m/s

Highest daytime winds occurred at twilight when lights were not yet needed. The average daytime wind speed would possibly be higher if I had more races at twilight time. Lowest winds of course occurred when it was closer to noon. Night-time wind speeds never dropped below 1 m/s.

The data was collected doing races with a single jumper, simulating an online situation. Wind behavior in longer offline competitions might not be accurately known.
Bartek Palewicz
Posts: 1150
Joined: 25 Mar 2011, 15:48
Location: Poland

Re: Bug in wind speed behavior

Post by Bartek Palewicz »

Risto Salonen wrote:According to a recent discussion with Jussi, wind speed should not depend on what time of day a race takes place. I quickly collected some data on this and there's a clear dependence: wind speeds are notably stronger at night. Therefore this is a bug, albeit not a major one.

NIGHT classification: lights switched on

DAY
Average wind speed (estimated, from 15 cases): 0.72 m/s
Highest avg: 1.5 m/s
Lowest avg: 0.3 m/s

NIGHT
Average wind speed (estimated, from 15 cases): 1.68 m/s
Highest avg: 2.1 m/s
Lowest avg: 1.4 m/s

Highest daytime winds occurred at twilight when lights were not yet needed. The average daytime wind speed would possibly be higher if I had more races at twilight time. Lowest winds of course occurred when it was closer to noon. Night-time wind speeds never dropped below 1 m/s.

The data was collected doing races with a single jumper, simulating an online situation. Wind behavior in longer offline competitions might not be accurately known.
Seems weird, but i'm not sure if i inderstand it. You did this:

1. Clicking 'World Cup' (with 1 jumper)
2. jumping 2 jumps and writing wind speed down
3. going back to menu

But you did this 15 times, right?
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Risto Salonen
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Posts: 159
Joined: 27 Jan 2007, 18:21
Location: Finland

Re: Bug in wind speed behavior

Post by Risto Salonen »

Dydux666 wrote:Seems weird, but i'm not sure if i inderstand it. You did this:

1. Clicking 'World Cup' (with 1 jumper)
2. jumping 2 jumps and writing wind speeds down
3. going back to menu

But you did this 15 times, right?
I jumped a few World Cups (with all hills, qualification rounds included) until I got enough cases which was 15 day AND night races. I wrote them down on a piece of paper. Note the wind speeds averages are estimations that shouldn't be too far off reality.
Bartek Palewicz
Posts: 1150
Joined: 25 Mar 2011, 15:48
Location: Poland

Re: Bug in wind speed behavior

Post by Bartek Palewicz »

LOL, it's funny, shouldn't it be compeletly random?

But it could be feature in Sapporo, these competitions are really windy... ;)
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skiflyer11
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Joined: 23 Feb 2011, 18:46
Location: Austria
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Re: Bug in wind speed behavior

Post by skiflyer11 »

Dydux666 wrote:LOL, it's funny, shouldn't it be compeletly random?

But it could be feature in Sapporo, these competitions are really windy... ;)
dont forget lahti ;)
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That's gotta hurt (sorry Zmaster for that fake ;))
Risto Salonen
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Posts: 159
Joined: 27 Jan 2007, 18:21
Location: Finland

Re: Bug in wind speed behavior (offline)

Post by Risto Salonen »

I just noticed this is offline only.
Jussi Koskela
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Re: Bug in wind speed behavior (offline)

Post by Jussi Koskela »

I had a look on this and found out that this correlation may exist (depending on the timing) if you are jumping with 1 ski jumper / 1 team.
I'll fix it to v1.1.1.
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