Gyroscopes are instruments capable of sensing changes in their inertial orientation. A gyroscope has one or more sensitive axis and can measure a rotation around them. They are usually mechanical devices that employ a rapid spinning mass to detect the inertial variations. Satellites usually have gyroscopes in the Attitude and Orbit Control System as attitude (orientation) sensors that measure a...

Digital elevation models (DEMs) of a coastal area in a time series are very useful to monitor annual and seasonal coastal morphologic changes. Topographic features in coastal regions change significantly within a relatively short period compared with landmass. However, it is difficult to obtain coherent interferometric SAR pairs over coastal areas. ERS-ENVISAT 30-minute tandem pair is useful to...

Remote sensing methods to derive snow properties using both optical and SAR data are presented. The assimilation of the remote sensing products in the water balance and rainfall-runoff model LARSIM is demonstrated. The flood forecast centre in Karlsruhe applies LARSIM for the operational runoff forecast of the Neckar in the South West of Germany. A fully automatic algorithm to derive snow cover...

Iterative maximum a posteriori (IMAP)-DOAS for retrieval of strongly absorbing trace gases: Model studies for CH4 and CO2 retrieval from near infrared spectra of SCIAMACHY onboard ENVISAT C. Frankenberg, U. Platt, and T. Wagner Institute of Environmental Physics, Heidelberg, Germany Received: 2 August 2004 – Accepted: 23 September 2004 – Published: 29 September 2004 Correspondence to: C. Franke...

Giovanni, the NASA Goddard online visualization and analysis tool (http://giovanni.gsfc.nasa.gov) allows users explore various atmospheric phenomena without learning remote sensing data formats and downloading voluminous data. Using NASA MODIS (Terra and Aqua) and ESA MERIS (ENVISAT) aerosol data as an example, we demonstrate Giovanni usage for online multi-sensor remote sensing data comparison...

Nadir-looking microwave radiometers are flown on different altimeter missions to correct the altimeter range for water vapor and cloud liquid water path delay in the troposphere. Actually four sensors, TOPEX, JASON-1, ERS2, and ENVISAT micro-wave radiometers (MWR) provide continuous measurements and the aim of this paper is to compare their measured brightness temperatures over the same hot ref...

A short overview is given on the achievements made in sea ice monitoring during the last decade utilizing the technical possibilities of Envisat ASAR. In particular we discuss the improvements by employing the dual-polarization image mode, the benefits of the wide-swath capability, and the advantage to select between seven swaths at different incidence angle ranges when using the image mode.

Retrieval of CO from SCIAMACHY onboard ENVISAT: detection of strongly polluted areas and seasonal patterns in global CO abundances C. Frankenberg, U. Platt, and T. Wagner Institute of Environmental Physics, Heidelberg, Germany Received: 2 November 2004 – Accepted: 14 December 2004 – Published: 20 December 2004 Correspondence to: C. Frankenberg ([email protected]) © 2004 Author(s). ...

Ozone and nitrogen dioxide profiles from the FinROSE chemistry transport model (FinROSE-ctm) are compared with observations from the GOMOS stellar occultation instrument on board the Envisat satellite. Data from 2004 is shown. The focus in the comparison is on polar night middle atmosphere. Also vortex averages are shown.

ABSTRACT Radar altimeters are instruments carried on space missions and allow for determination of heights, particularly in oceans ice sheets. The use altimetry data continental waters involves several challenges, such as the revisit frequency (typically 27 to 35 days), an accuracy decimeters, handling processing, narrow rivers São Francisco River (width<1km). satellite has advantages over c...