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    Re: Ah, give someone a calculator.......
    From: John Huth
    Date: 2010 Aug 15, 11:00 -0400
    I have a real dilemma in the class I'm teaching in the fall.   One of the earlier exercises is to measure the length of paces of the students, 
    and see how many paces there are to the mile (of course it roughly comes out to 1000).  Then we deal with knots and nautical miles.

    At a certain point, I have to turn the corner and talk about forces, energy, latent heat, lift, drag etc etc - and I really don't want to use slug, pounds, 
    foot pounds, BTU etc - so I'm going to have to switch over.

    On Sun, Aug 15, 2010 at 10:27 AM, Gary LaPook <glapook@pacbell.net> wrote:
    I took your advice and set my page preferences to show both English and metric units on Weather Underground and this is what it shows right now for Paris:

    Temps en région tropicale: Invest 90 (East Pacific)
    Conditions actuelles     
    Paris, FR (Aéroport)
    Mise à jour: 33 min 50 sec ago
    Light Rain
    59 °F / 15 °C
    Pluie fine
    Humidité: 88%
    Point de rosée: 55 °F / 13 °C
    Vent: 18 mph / 30 km/h / 8.2 m/s from the Nord
    Pression: 29.98 pouce / 1015 hPa (Régulier)
    Visibilité: 8000.0 Miles terrestres / 12872.0 Kilomètres
    Ultraviolet: 4 sur 16
    Nuages épars 1000 ft / 304 m
    Few 1700 ft / 518 m
    Généralement nuageux 3300 ft / 1005 m
    (Au-dessus du niveau du sol)
    Altitude: 358 ft / 109 m
    Mises à jour en temps réel:
    Éditez mon fuseau horaire Débronchement
    Source pour des conditions actuelles:
    PWS & Aéroport Aéroport Seulement

    » Historique de la météo pour cet endroit

    Satellite Webcam
    Click Image to Enlarge
    WunderMap new!
    Trip Planner Planificateur de voyage
    Weather Stations Stations météorologiques
    Choisissez une source pour vos conditions actuelles:

    METAR LFPG 151330Z 36016KT 8000 -RA SCT010 FEW017TCU BKN033 15/13 Q1015 NOSIG


    This makes me laugh even more as the person who programed the conversions has made even more funny errors.

    We now have the pressure in inches of mercury (the english unit) as well as hectopascals (the metric unit.) which are correct but the next line shows the visibility to be 8000.0 statute miles, 12800 km!

    I know, sometimes you can see 92 million SM when the sun is visible (not today, il fait naeugeux), but  they never measure 8000 SM visibility.

    Look at the actual METAR report at the bottom and you will see the group "8000" which is the measured visibility in meters. The programmer apparently took this to mean 8000 SM.


    And the cloud heights, (nauges) 1000 feet and 304 meters, why not an  even 300 meters? And more clouds at 3300 feet, 1005 meters, why not an even 1000 meters?


    Marcel Tschudin wrote:
    Yes, I'm more familiar with metric units but I'm aware that for
    certain applications, like aviation, the English units are kept being
    used. I don't know why in aviation they can't use 300m instead of
    100ft. May be one fears that a change to metric would create a too
    high risk.
    So, if English units are the "decent" ones for you, why then you don't
    click on the link "Page Preferences" at the top of wunderground's page
    and adjust the units to be shown to those? Since the METAR are in
    English units you would see the original data without conversion.
    BTW, regarding English units: I noticed recently that the department
    stores here in Istanbul indicate the power of air conditioners in BTU.
    I guess that only a very, very small part of the population in this
    country knows what this stands for.












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