1. Introduction

SatView is an interactive tool for displaying satellite images and weather data. It plots color satellite image data as well as contour and vector fields and continental outlines. The user is given the option of setting a wide variety of parameters involved in the plotting. However, each parameter has a reasonable default, so the user need not involve himself at that level if he chooses not to. SatView runs under X windows.

There are a few things you need to know to understand the manual. First, the word `button' is used to describe an item on the screen that you click on, as well as the switches on a mouse. Hopefully, you will be able to discern which `button' is intended by the context. The format uses are listed below.

Boldface type marks menu and button items.

Italic type marks emphasis.

Keyboard type marks user keyboard entry and computer status messages.

Also, if the manual says to `select' a button, it typically means you should click the left mouse button once while the cursor is in that button. It is possible for left-handed people to change the `select' mouse button to be the right or middle button, if so desired. See your system documentation. If there is a small downward arrow following the button label, it means that there is a menu associated with that button. Selecting that button will invoke the first entry in the menu. Holding down the mouse menu button (typically the right mouse button) will pop up the menu, and you may select any entry in the menu by sliding the cursor until your choice is highlighted, and then releasing.

Remember: unless you explicitly change them, the left mouse button is the select button and the right mouse button is the menu button.

SatView can display two types of data files: satellite image (SI) files and overlay (OV) files. Satellite image files are rasterized images with latitude & longitude information. Overlay files contain gridded or irregular data to be displayed as contours, vector fields, or markers. Appendices A, B, and C discuss these data formats in excruciating depth.