Output roadcast (METRo)

From Documentation

Contents 1 Description 1.1 Version and revision date 1.2 Default location 2 Contents 2.1 Mandatory fields 2.1.1 Header 2.1.2 Road forecast 3 Example

[edit] Description

This file contains the road weather forecast. Moreover, other usefull weather elements of the atmospheric forecast are included.

Except for the road condition, the values in the output files represent the field at the exact time. There is no averaging that is done during the 20 minutes period.

[edit] Version and revision date

• Version: 1.5
• Revision date: March 1st 2007

[edit] Default location

The standard directory where METRo is executed.

[edit] Contents

[edit] Mandatory fields

[edit] Header

Field description	Element name
Version number	version
Date of creation	production-date
Date and time of the first roadcast	first-roadcast
Time zones of station	time-zone
Latitude and longitude	coordinate + latitude, longitude

[edit] Road forecast

Field description	Element name	Unit
UTC Date of road forecast	forecast-time	ISO 8601
Time since the beginning of the road forecast	hh	Hours, decimal precision
Road surface temperature	st	Celsius
Road sub surface temperature* (40 cm)	sst	Celsius
Air temperature	at	Celsius
Dew point	td	Celsius
Wind speed	ws	km/h
Quantity of snow or ice on the road	sn	cm
Quantity of rain on the road	ra	mm
Total (1 hr) snow precipitation	qp-sn	cm
Total (1 hr) rain precipitation	qp-ra	mm
Solar flux	sf	W/m²
Incident infra-red flux	ir	W/m²
Vapor flux	fv	W/m²
Sensible heat	fc	W/m²
Anthropogenic flux	fa	W/m²
Ground exchange flux	fg	W/m²
Blackbody effect	bb	W/m²
Phase change	fp	W/m²
Road condition	rc	METRo code
Octal cloud coverage**	cc	octal

* If the layer type of the road is a bridge and if the bridge has a thickness of less than 40 cm, the air temperature below the bridge is written as output in the SST field. For more information about the temperature profil in under the ground, see the vertical levels article.

** When both solar and infra-red flux are given in the input atmospheric forecast file and both --use-solarflux-forecast and --use-infrared-forecast are given in the command line, the cloud cover value in the roadcast is set to -1.

[edit] Example

<?xml version="1.0"?>
<roadcast>
  <header>
      <filetype>roadcast</filetype>
      <version>1.5</version>
      <road-station>oaa</road-station>
      <production-date>2004-08-26T01:00Z</production-date>
      <first-roadcast>2004-08-25T23:12Z</first-roadcast> 
  </header>
  <prediction-list>
      <prediction>
       <forecast-time>2004-08-26T00:00Z</forecast-time>
         <hh>20.0</hh>
         <at>-7.03</at>
         <td>-11.96</td>
         <ws>22.11</ws>
         <sn>0.0</sn>
         <ra>0.0</ra>
         <qp-sn>0.0</qp-sn>
         <qp-ra>0.0</qp-ra>
         <cc>7</cc>
         <sf>35.81</sf>
         <ir>298.06</ir>
         <fv>0.0</fv>
         <fc>-128.07</fc>
         <fa>10.0</fa>
         <fg>-71.37</fg>
         <bb>-287.17</bb>
         <fp>0.0</fp>
         <rc>1</rc>
         <st>-0.79</st>
         <sst>-7.02</sst>
      </prediction>
      <prediction>
          <forecastime>
          ...
  </prediction-list>
</roadcast>

METRo I/O files

Station | Observation | Forecast | Roadcast | Configuration

METRo I/O specification

Schema | | Flowchart | Format | Date | Observation QA/QC | Road condition | Station type | Time zone | Layer type | Latitude and longitude

METRo I/O examples

Station | Observation | Forecast | Roadcast | Graphical display

This page is part of the documentation of the METRo software. Back to the table of content.