Co-WIN Past Weather Data Analysis

• Facilitate teaching using Automatic Weather Station (AWS)(Guidelines) (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University)

• 使用自動氣象站促進教學(指引)（撰稿人：香港理工大學應用物理學系黃文翰）

• Manipulation of Weather Data through Co-WIN (Contributed by Eugene Ng of the Department of Applied Physics, The Hong Kong Polytechnic University)

• 天氣觀測課程（香港天文台）

Co-WIN Data Download and Analysis Tutorial

This tutorial intends to help users of the Co-WIN web interface (http://weather.ap.polyu.edu.hk) to understand how to download archived Co-WIN data via the web interface, and how to use the data to create time series.The following topics will be covered in this tutorial:
1) Downloading data from Co-WIN web interface.
2) Creating two time series on the same graph.
3) Adding a secondary y-axis to the graph.
4) Slanting the x-axis (time axis) label by 30 degrees.
5) Manually setting the start point and end point of the x-axis (time axis).
6) Adding graph title, axis titles, legend, and other chart-related accessories.

Read Tutorial on Co-WIN Data Download and Analysis Using Excel (Sample data file and time series used in the tutorial)