The Explorer application maintains a central clock for all temporal data. When
the clock is updated all time-sensitive layers, widgets and visualizations are
updated. The clock can be set to your computer’s time, or you can set it to an
arbitrary time, or it can be set to a temporal input, like a time-series layer.
The Time Widget is not just a clock. It displays temporal data relative to
the position of the crosshairs on the globe. As you pan the globe, the widget
updates the time values for the current location under the crosshairs.
The application’s date and time and time zone are displayed in the body of the widget
The format of the date and time are controlled in the settings
The sun icon that orbits the dial indicates the local solar hour angle.
Solar noon is at the top of the dial, and midnight is at the bottom.
When the sun icon is at the top of the dial, then the real sun is at its zenith.
To see it in action, either move the time slider, or zoom out on the globe and move the crosshairs in an easterly or westerly direction.
Note that the sun icon turns dark during nighttime hours.
The sunrise and sunset times are displayed under the widget.
The yellow and orange markers on the dial depict the solar hour angles for sunrise and sunset respectively.
The times are relative to the application date/time and the geographic position.
To see it in action, zoom out on the globe and then pan north and south to the poles, or rapidly advance the time slider.
The figure above shows the globe’s time controls.
The clock button resets the time to “now”.
The forward and backward buttons advance or retard the time one hour, respectively
The fast forward and rewind buttons advance or retard the time 24 hours, respectively
The time slider is used to adjust the date and time.
The figure above shows the controls for a layer’s time series.
Layers that contain time-based content manifest a set of controls in their layer settings.
These controls are used to select the time frame to display, and, when used, they
set the time for the entire application, including all other time series layers.
The play button starts an automated playback the time frames
The forward and backward buttons advance or retard the layer’s time frame by one image, respectively
The repeat button, when enabled, causes the playback to restart at the beginning when it reaches the end of the time series