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ERS-Altimeter
STATUS
Not Operating
AVAILABILITY
via ESA ERS-1 data portal
REQUEST PROCEDURE
ESA data portal
Satellite Instruments
The Radar Altimeter is a Ku-band (13.8 GHz) nadir-pointing active microwave sensor designed to measure the time return echoes from ocean and ice surfaces.via The Radar Altimeter is a purely nadir looking instrument with a footprint of a few kilometers. It sends radar signals to the earth and ocean surface and collects the return pulse. The returned power as a function of travel time is called the wave form. Processing of the waveform provides information on: the wave height and wind speed (over oceans), the surface backscatter, and the height of the satellite above the surface. Together with a precisely computed orbital altitude, the latter gives the height of the surface above a well-defined geocentric reference frame. This provides the possibility to monitor the global ocean circulation, but also regional current systems, and study the marine gravity field.
SPECIFICATIONS
Measurment TypeMicrowave-radar-altimeter
Platform Typepolar orbiter
OrbitSun synchronous
Spectral Coverage
Active/PassiveActive
Scan PatternNadir
Variables
Altitude798
Inclination90
Repeat Time35 days
Wavelength to nm
Number of Bandsn/a
Start DateJul 1991
End DateOct 2000
Temporal Coverage
Swath Widthn/a
UPDATED ON
3 Sep 2009 13:47