NOAA CoastWatch East Coast Node
Data Types Info Data Types: SST         - AVHRR                 - GOES                 - Geo-Polar Blended                 - PODAAC MUR Chl-a       - MODIS Clarity     - K490                 - Rrs667 (MODIS)                 - Rrs672 (VIIRS)                 - TSM True Color (VIIRS)
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Daily Satellite Image

 

Satellite:NASA Aqua
Instrument:Moderate Resolution Imaging Spectroradiometer (MODIS)

 

Satellite images are useful for observing the Earth at visible wavelengths, like a camera photo of the Earth. Land and water features can be seen in these images. Because cloud coverage is very obvious, these images can be used to quickly determine if a particular day's image is useful for observing a land or water feature.

The Aqua satellite passes overhead once per day in the early afternoon (daytime equator crossing is approximately at 1:30 PM local time).

sample Chesapeake Bay satellite image
Imagery ©2010 TerraMetrics, Map data ©2010 Google, Overlay NOAA CoastWatch

These satellite images are true color combinations of data from the satellite instrument's measurements at the red, green and blue visible wavelengths. In true color imagery, these wavelengths are combined to create a color-realistic image, just like a digital photograph.

The Aqua/MODIS wavelength bands 1 (red), 4 (green) and 3 (blue) are first corrected for atmospheric effects (Rayleigh correction). In addition, the green and blue bands are interpolated from their 500m spatial resolution to the red band's 250m spatial resolution. After these steps, the red, green and blue bands are projected into the RGB image planes to create the true color image.


 
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