Altimeter

It changes with temperature and with barometric pressure.

I have also an audible altimeter.

My only instruments are an altimeter and time.

ERS 1 radar altimeter data provide worldwide surface information.

PRARE on ERS 2 provides precise corrections of altimeter measurements.

The satellite uses a radar altimeter to yield precise measurements of sea surface height.

What you just heard are the interactions of barometric pressure, wind and temperature readings that were recorded of Hurricane Noel in 2007.

What you just heard are the interactions of barometric pressure, wind and temperature readings that were recorded of Hurricane Noel in 2007.

. ERS 1 also carried a radar altimeter that operated at a wavelength of 2 cm.

ERS 1 also carries a radar altimeter (RA) that operates at a wavelength of 2 cm.

Envisat 1 Earth observation mission devoted to the observation of the environment (microwave radiometer and radar altimeter contribution)

The altimeter was used to measure average wave height and wind speed and to determine meso scale ocean topography.

Data from this altimeter have been used successfully to determine ice type and topography as well as water ice boundaries.

Data from the altimeter had been used successfully to determine ice type and topography, as well as water and ice boundaries.

CNES will provide the altimeter and the Doris system, while NASA will supply the radiometer, the laser reflector and the positioning system.

The radar altimeter permits the measurement of wind speed, wave height, sea surface elevation, ice profile, land and ice topography, and sea ice boundaries.

Alcatel Espace will construct the Poseidon II radar altimeter for Jason, a joint mission of CNES and the National Aeronautics and Space Administration (NASA).

The ATSR Microwave Sounder is a dual frequency passive radiometer, whose data are used primarily to correct radar altimeter measurements and to determine the atmospheric vapour content.

In the ENVISAT 1 programme, Norsk Forsvarsteknologi and Norsk Elektro Optikk are developing important components for the spectrometer, while AME Space will supply electronics for the radar altimeter.

The precise range and range rate equipment (PRARE), operational on ERS 2, allows precise orbit calculations to be made and accurate corrections to radar altimeter measurements to be implemented.

It disposes of an ultra precise Satellite Laser Ranging System (SLR), a permanently recording Global Positioning System (GPS) receiver, a radar altimeter transponder, software expertise for GPS, laser and altimetry data reduction and processing.

Its instruments would include advanced synthetic aperture radar, a Global Ozone Monitoring by Occultation of Stars instrument, a medium resolution imaging spectrometer, a Michelson interferometer for passive atmospheric sounding, a radar altimeter (RA 2) and an advanced along track scanning radiometer.

Both above mentioned universities are also involved in research work on precise orbit determination using laser ranging and satellite altimeter data, which are also used to determine the mean sea level, as well as the ocean variations on a global scale.

Its instruments will include advanced synthetic aperture radar (ASAR), a global ozone monitoring by occultation of stars (GOMOS) instrument, a medium resolution imaging spectrometer (MERIS), a Michelson interferometer for passive atmospheric sounding (MIPAS), a radar altimeter (RA 2) and an advanced ATSR.

The payloads of the satellite segment of both systems would be designed to monitor the land and ocean environment, the geosphere, hydrosphere and meteorological conditions, with the aid of visible, near infrared, microwave, short wave and thermal radiometers, synthetic aperture radar, radar altimeter and scattering lidar.

Instruments on board ENVISAT include Advanced Synthetic Aperture Radar Radar Altimeter Medium Resolution Imaging Spectrometer Michelson Interferometer for Passive Atmospheric Sounding Global Ozone Monitoring by Occultation of Stars Advanced Along Track Scanning Radiometer Scanning Imaging Absorption Spectrometer for Atmospheric Cartography Scanner for Radiation Budget and Doppler Orbitography and Radio positioning Integrated by Satellite.

With the Active Microwave Instrument (SAR and Wind Scatterometer) and Radar Altimeter remaining unaltered from ERS l, modifications to the second satellite payload involved the addition of a completely new instrument, the Global Ozone Monitoring Experiment, modification of the Along Track Scanning Radiometer and the upgrading of the Precise Range and Range rate Equipment for determining orbital position.

11. The principal instruments on board the satellites include (a) an Active Microwave Instrument (AMI), which comprises a synthetic aperture radar (SAR) and a wind scatterometer (b) a radar altimeter (RA) (c) an along track scanning radiometer (ATSR), which comprises an infrared radiometer (IRR) and a microwave sounder (MWS) (d) precise range and range rate equipment (PRARE), presently functioning only on ERS 2 and (e) a laser retroreflector.