SpectralSea - Software - IOS - SpectralSea
Download on the App Store

Buoys that collect weather and wave information come in many different flavors. Some buoys only report instantaneous weather and wave height information. Some only report the height of the sea. And some report the amount of energy in discrete spectral bands across a wide frequencies. This App collects data from all the different types and offers a display suitable for the type of data you are looking at.

One type of buoy reports only sea height. These buoys are designed to report on tsunami waves. The sea height varies over the course of day with the tides. The tides vary in a predictable pattern depending on the time of day, the phase of the moon, and the season. When an earthquake disturbs the ocean causing a tsunami, the sea high will change drasticly in a much shorter period than the normal tidal flucuations. Using this App, data can be collected from these buoys to show the flucuation due to tsunamis. The image below shows a buoy with normal tidal flucuations.
SpectralSea screenshot

Another type of buoy collects weather and wave information. The image below shows the screenshot showing the text data for the observation for buoy TPLM2.
SpectralSea screenshot

And finally, there are buoys that collect detailed information on how much energy is in discrete spectral bands. The image below is from buoy 46086 near San Clemente, CA. This plot shows the current observation in dark blue (the highest peaked line), and the 10 previous observations in progresivly more purple colrs and lighter. The image below shows the current reading (at 10pm MST on 20 February 2013) with a peak energy in the 11 second range. There is also significan energy in the 17 second period. Frequently the buoy observation will show a double peaked spectrum graph. The long period waves (in the 14+ second range) are waves that typically come from long distances. These charts can be used to watch buoys well offshore to monitor the long wave energy as waves from distant storms move towards the coast.
SpectralSea screenshot

All of the plots from the three different types of displays have two controls along the bottom that let you control what is shown on the screen. For the Observations and the Spectral Waves display, the slider (and the + and - buttons) let you move backward and foward in time to see observations at different times. The default display will show the most current reading, moving the slider to the left or touching the - button will show observations back further in time. With the Sea Height display, the slider determins how much data to display. With the slider all the way to the right, the display shows the most recent 8 hours. With the slider all the way to the left, you can see up to 40 days worth of data or so. The two images below show what an iPad display looks like with all the data shown, and only the most recent data shown.
SpectralSea screenshot
SpectralSea screenshot

The image below shows a map with many of the buoys on it. The buoys pins are color coded such that red pins indicate buoys with spectral wave energy and observations. Purple colord red indicate buoys that display Sea Height. And green colord pins indicate buoys that have only an observation.
SpectralSea screenshot