By Seelye Martin
Absolutely up to date, with major new assurance of advances in satellite tv for pc oceanography and effects from new satellite tv for pc missions, the second one version of this renowned textbook introduces scholars to how distant sensing works, tips on how to comprehend observations from Earth-observing platforms, and the observations' value to actual and organic oceanography. It offers complete motives of radiative move, ocean floor houses, satellite tv for pc orbits, tools and strategies, noticeable distant sensing of biogeochemical houses, infrared and microwave retrieval of sea floor temperature, sea floor salinity retrieval, passive microwave measurements, scatterometer wind retrieval, altimetry and SAR. additionally incorporated are descriptions of the web records the place info may be received, and readers can receive on-line instruments for operating with the knowledge - permitting hands-on engagement with real-world observations. this can be a fantastic textbook for graduate and complicated undergraduate scholars in oceanography, distant sensing and environmental technological know-how, and a pragmatic source for researchers and pros operating with oceanographic satellite tv for pc information.
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Additional info for An Introduction to Ocean Remote Sensing
Level 1A. At the archives, the Level-0 data are processed into full-resolution files with units of digital counts that are annotated with related ancillary data such as time references, calibration coefficients and geolocation information. Level 1B. The Level-1A data are converted to sensor units such as radiances or brightness temperatures written in digital counts and presented in an along-track swath format corresponding to the instrument scan lines. In the scan line presentation, the geographic distance between data points corresponds to the cross-track dimension of the nadir FOV.
VIIRS uses these sub-detectors to partially correct for the bowtie effect by constraining the increase in the field-of-view with scan angle. As the following shows, VIIRS compensates for this increase by having the number of along-scan sensors decrease as the view angle increases. 11 shows the configuration of the VIIRS along-scan sensors, and, for specific values of the scan or view angle θV , the approximate IFOV dimensions for the M-bands. 75 km. 3 km, so that it remains approximately square.
There is also a fourth altimeter orbit used for observations of sea surface topography that is at a slightly higher altitude than the Sun-synchronous orbits, and there are also various low-altitude non-Sunsynchronous orbits used for observations of phenomena such as winds and rainfall. The following summary shows that each particular orbit has advantages and disadvantages. Because no single orbit allows coverage of all space and time scales, there is no such thing as a “perfect” satellite orbit or system.