Explanation of the criteria for classification and numbering of components     E25.1.04
(DEC 99)
Explanation of the dates on the component's description



1.   Purpose and objectives

     To provide basic guidance and standards for the selection, installation, operation and maintenance of an automatic station for observing surface climatic variables and to ensure that the data collected 
will meet minimum requirements for compatibility with Canadian Atmospheric Environment Service (AES) climatological network data.

2.   Description

     This guide consists of three major sections. The section on Descriptions and Definitions defines terms used in the document and described station classification and observing programs, climatological elements, and other relevant concepts. The section on Requirements and
Standards provides guidelines for siting, site documentation, and standards for data accuracy, recording format and recording medium. The standards specified in this section must be adhered to if the data are to be acceptable for inclusion in the Canadian AES National Climatological Archive. The last section on Recommended Practice provides recommendations on system and support requirements, guidelines on installation, site operation and maintenance, and procedures for data quality assurance.

3.   Input

     Not applicable.

4.   Output

     Not applicable.

5.   Operational requirements and restrictions

     Not applicable.

6.   Form of presentation

     Report available in both English and French. 

7.   Operational experience

     Version 2 of Guidelines published October 1992.

8.   Originator and technical support

     Canadian Climate Centre
     Atmospheric Environment Service
     Environment Canada.

9.   Availability

     From the HOMS National Reference Centre for Canada, and on the Internet at

10.  Conditions on use

     $10.00 Canadian funds (subject to change without notice) if requesting hardcopy.


(First entered: 24 AUG 90

Last updated: 14 DEC 99)