from PART IV - Applications and Operational Systems
Published online by Cambridge University Press: 03 May 2011
Abstract
As the primary archive for the data acquired by the Landsat series of spacecraft, the U.S. Geological Survey Center for Earth Resources Observation and Science (EROS) is responsible for the processing systems that capture, correct, and distribute Landsat image data products. The Landsat ground system includes product generation components that apply the radiometric and geometric processing necessary to convert the digital detector samples acquired by the sensor to top-of-atmosphere radiance measurements referenced to an Earth-fixed coordinate system. These product generation systems implement geometric correction algorithms that use the instrument and spacecraft support data, provided in the Landsat data stream, to construct a model of the geometric relationship between the acquired image data samples and an Earth-fixed ground reference system. These support data include onboard measurements of instrument timing, spacecraft attitude (orientation) and jitter, and estimates of the spacecraft position and velocity derived from ground tracking data. The accuracy of the basic systematic geometric registration model is limited by uncertainties in these supporting data. In particular, the spacecraft position and attitude data typically contain residual biases on the order of tens to hundreds of meters. Fortunately, these errors are usually slowly varying, allowing for the registration of multiple Landsat images using simple, low-order techniques. When higher-accuracy products are required, additional capabilities of the Landsat ground system are employed to perform more precise geometric correction.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.