Wiley Encyclopedia of Electrical and Electronics Engineering 2017
DOI: 10.1002/047134608x.w1125.pub2
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Satellite Altimetry: Principles and Applications in Earth Sciences

Abstract: Satellite altimetry is a radar technique measuring the topography of the Earth surface. It was initially designed for the measuring of the topography of the sea surface with reference to an ellipsoid and for the determination of the marine geoid. It also provided valuable information on the ocean circulation. With the improvement of the orbit accuracy from the meter to the centimeter level, satellite altimetry has become a key measurement to estimate sea level variations from regional to global scales. Satelli… Show more

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Cited by 14 publications
(20 citation statements)
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“…The satellite altitude (H) referred to an ellipsoid is also accurately known from orbitography modeling. Taking into account propagation delays due to interactions of electromagnetic wave in the atmosphere and geophysical corrections, the height of the reflecting surface (h) with reference to an ellipsoid or a geoid can be estimated as [16,17]:…”
Section: Altimetry Data Processingmentioning
confidence: 99%
“…The satellite altitude (H) referred to an ellipsoid is also accurately known from orbitography modeling. Taking into account propagation delays due to interactions of electromagnetic wave in the atmosphere and geophysical corrections, the height of the reflecting surface (h) with reference to an ellipsoid or a geoid can be estimated as [16,17]:…”
Section: Altimetry Data Processingmentioning
confidence: 99%
“…A negative bias indicates that the measure of the SSH by the altimeter is underestimated; either the altimeter range is being overestimated, or the orbit is biased downwards [6]. The SSH from the altimeter is given as [2,37]:…”
Section: Ssh From Altimetrymentioning
confidence: 99%
“…Satellite altimetry is a radar technique detailing the topography of the earth's surface based on the measurement of the distance between the satellite and the surface, derived from the two-way travel time of an electromagnetic wave emitted by the altimeter, or altimeter range and the precise knowledge of the satellite orbit [1,2]. The primary objectives of satellite radar altimetry are to measure the marine geoid, ocean currents, and sea level variability.…”
Section: Introductionmentioning
confidence: 99%
“…Nadir altimeters emit a radar pulse in the nadir direction (or local vertical, Figure 1) and then record the radar echo using a pulse compression technique. This record, also known as the waveform, contains the value of the returned power as a function of time or, equivalently, of distance between the radar and the reflectors (Chelton et al, 2001;Frappart et al, 2017). The two-way travel time (T), given by the leading edge of the waveform signal, is estimated accurately using a "retracking" algorithm applied to the waveforms by the mission processing centre.…”
Section: Introductionmentioning
confidence: 99%
“…However, estimates of the range R need to be corrected for propagation delays of the radar signal within the atmosphere (these corrections are labelled ΔR propagation ) and for some known geophysical signals that affect measurement (these corrections are labelled ΔR geophysical ) (e.g. Chelton et al, 2001;Frappart et al, 2017). In our study, ΔR propagation includes the ionosphere correction, the dry troposphere correction, and the wet troposphere correction (for more details, see Biancamaria et al, 2017).…”
Section: Introductionmentioning
confidence: 99%