Chris Curtis Web Site

Thursday 8 November 2007

Kent Night Cup - Sheffield Forest

Filed under: Orienteering, Science, Weather — Chris Curtis @ 22:25

I was rather hesitant about going to my first night orienteering event for ages because of the awful weather late in the afternoon. An active cold front came through making things very wet, windy and, well, cold. I resigned myself to a miserable time and went anyway.  I am glad I did.

About 40 of us gathered in a clearing a few km outside the village of Nutley and around a km into the forest. The front had passed, the air was crystalline and the night sky was awe-inspiring.  As I climbed out of the car, the sky looked perfectly black and there were more stars than seemed possible. The milky way arched overhead and even the “dark lanes” through Cygnus were clearly visible. Once my eyes adapted, it was slightly less impressive, as the distant light pollution was obvious, even if you could see more stars. I could have stayed for hours, but orienteers with giant spotlights strapped to their heads kept blinding me (accidentally I am sure) as they moved around and anyway it was soon time to run.

The event was very low-key but friendly.  it was a one-hour “score” format (where you try to spike as many controls as possible in the time, with penalties for being back late). It was odd in the dark. I kept coming across people I knew and chatting for a few moments but you could only ever see people very close to you so it became quite confusing. Maps were given out and studied then we had a mass start, punching through as fast we could and heading off in all directions.

I was with a group heading west where there was a tempting set of controls, all of which were in the forest off paths, but with good catching features (like open ground behind) or reasonable “handrails”. It took me a while to recapture the feel of night orienteering, so the big group left me behind, but I found the controls without too many complications, except that the bracken was still very high and slowed me down. The plan was then to get across one of the deep stream valleys and up the slope on the other side to access a few controls there before picking up some easier controls up the forest road to the finish. Having fought with the bracken and fearing loss of contact with the map, I decided to stick to clear paths and run down to a bridge and forest road across the valley. This worked, but I ended going up and down a track on the hillside several times, trying to find a way up to a ride from which I could access the controls. I never managed it. None of the paths or other features I was looking for became obvious and I was just getting more confused. I could backtrack to a very secure location (which I did more than once) but when I headed out from it the ground and map seemed disconnected very quickly. With the clock ticking, I had no choice but to move on to the third part of my plan and try to “hoover up” controls on the way back to the finish. Thankfully, this worked and apart from one or two minor hiccups things made sense and went smoothly. I was catching a control every few minutes for the first 12 minutes or so, and the last 20 but had a completely fallow period in the middle.  I got about half the controls in just under an hour - about a dozen runners got them all - the winner in about 40 minutes.

I very much enjoyed the challenge and I like being out in the forest on my own at night - especially such a stunningly beautiful one. I found I could run well except where there was a lot of bracken and I felt much more secure than I have before about running in the dark.

I have a combined 3-LED and traditional head torch (by Petzl) which seemed good to me. The LEDs are perfect for map reading and the main torch lets you see well enough to run. It would definitely have been easier with some of the monster lights people were wearing - I probably could have pierced my way off the track on the slope if I could have seen beyond the immediate greenery along its edge, but as well as not being willing to spend 80 pounds or more on something I do occasionally for fun, I am not sure how I feel about this technology. Running around with a vest full of batteries and something that could pick out high flying aircraft does not seem respectful of the forest somehow. Night orienteering is much harder than in the daytime, even with the big lights, but someone who was trying one for the first time described it as “being like running in the daytime” which seems to miss the point really. There is also a real problem with being dazzled - especially in a score event where people converge on controls from all directions. People were very considerate and careful, but being “flashed” occasionally by very bright lights was inevitable. Just a personal feeling - maybe I just like groping around in the dark - it fits my normal style of navigation!

I had to get back so did not go to the “apres-O” in the local pub (which looks like it was fun) but the evening was nicely rounded off by cloud rolling back in and rain falling as I drove home.

A great event - with good challenge and enough success to feel good about.

Wednesday 20 September 2006

Ex-Hurricane Gordon

Filed under: Weather — Chris Curtis @ 22:56

I spent a few days watching the progress of Hurricane Gordon as it crossed the Azores and headed this way. It still had a visible eye while in the Bay of Biscay, but became mixed up with a frontal system and ended up crossing Southern Ireland before dissipating in the Atlantic.

The effect here was to give us a day and evening of remarkable hot winds - the top temperature was 26C with a moderate to strong breeze. This was most noticeable in the evening when the warmth surrounded you in the dark - more like the South of France in summer than the UK in early autumn.

Sunday 1 August 2004

New Version of weather decoder

Filed under: Software and Web, Weather — Chris Curtis @ 22:17

A few bug fixes and the ability to handle military airfield colour codes in reports means that weather decoder is now in version 1.2.

Click here to see it in action and here to download the script.

Thursday 22 July 2004

Weather Decoder

Filed under: Software and Web, Weather — Chris Curtis @ 14:37

I started playing with “taf decoder” again, and decided to add a translation of the “Metar” (current weather report) as well as the “TAF” (forecast) for the airport. What we now have is

WEATHER DECODER v:1.0

Weather decoder is a php script that will run on any php enabled web server. A little simple editing will allow you to present the viewer with a list of airports. On submit, the script fetches the details of the weather for that airport from the National Weather Service in the USA and translates the coded formats to display a current aviation weather report and the aviation forecast. Although these are a specialised form of weather report and forecast (e.g. no forecasts are made of temperature or amounts of rain because these are not very relevant to aviators) they are detailed and usually accurate and the data is easily available.

The script is open source - mostly written from scratch by me, but borrowing from previous similar projects by others (details in the readme and commented in the script).

To see what it does: click here. To download the script and readme in zip format: click here

Please feel free to comment!

Thursday 15 July 2004

TAF decoder 0.4

Filed under: Software and Web, Weather — Chris Curtis @ 23:53

I have done a bug fix so it now handles RADZ (rain and drizzle) and RASN (rain and snow = sleet) correctly. I will post 0.4 for download when I get a second.

Saturday 10 July 2004

Taf decoder v0.3

Filed under: Software and Web, Weather — Chris Curtis @ 23:41

I have added a minor repair or two and some improvements to the TAF decoder script. It now displays windspeeds in mph, kph and beaufort and I have added a little formatting.

To see it in action, click here to download the php script click here.

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