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Envision is the first mission to Venus with a subsurface radar sounding instrument (SRS), which will directly measure the planet’s subsurface features. Furthermore, its VenSAR radar will be the first instrument to image parts of the planet at a very fine resolution of 10 metres and to perform polarimetric imaging, to further advance our knowledge of Venus’ surface.
- Esa's Venus Express
Artist's view of Venus Radio Science experiment. Launched 9...
- Past Missions to Venus
NASA's MESSENGER mission to Mercury also made use of Venus...
- Kourou, French Guiana
The launch facilities as seen from the ISS. Just northwest...
- VenSAR
The EnVision VenSAR radar will contribute to addressing the...
- Instruments
EnVision payloads and experiments. The EnVision mission will...
- Esa's Venus Express
EnVision is an ESA led mission in partnership with NASA, with NASA providing the Synthetic Aperture Radar (VenSAR), suport to the Aerobraking phase, and Deep Space Network support for critical mission phases. The ESA Study and Project Teams are located in ESA's centre ESTEC (Noordwijk, The Netherlands).
Jun 10, 2021 · This video describes the deployment of EnVision's instruments VenSAR and SRS, as well as some basic spacecraft operations. VenSAR is a Synthetic Aperture Radar, and will map the surface of Venus using a range of modes including imaging at spatial resolutions of 10 m to 30 m, altimetry, polarimetry and radiometry.
- Jet Propulsion Laboratory
- Vensar
- Regional and Targeted Surface Mapping
- Stereo Imaging
- Altimetry
- Polarimetry
- Radiometry
VenSAR Project Scientist: Scott Hensley (JPL, Pasadena, USA) The EnVision VenSAR radar will contribute to addressing the key science objectives of the mission. It will image pre-selected Regions of Interest with resolution of 30 m/pixel and high resolution (10 m/px) across some RoIs. Imaging will be essential for reconstruction of the surface strat...
VenSAR will obtain SAR imagery at 30 m (resp. 10 m) resolution, at targets of regions of up to 1000 x 1000 km (resp. 100 x 100 km).
Radar stereo or radargrammetry uses image displacements or parallax measurements between radar images acquired at different incidence angles to solve for topography. Unlike radar interferometry, radar stereo does not use phase information, and in fact is usually applied in imaging geometries that exceed the critical baseline precluding standard int...
The altimeter beam limited footprint in the along-track and cross-track directions allows to derive a pulse-limited footprint resulting in a vertical resolution of 2.5 m.
Because the interaction of an electromagnetic wave with a surface can be polarisation dependent, this can be exploited to infer information about an object or scene being observed. VenSAR will measure HH + HV SAR polarimetry.
When analyzed in synergy with polarimetry active measurements, off-nadir radiometry can be used to determine the surface effective temperature, enabling global mapping of polarimetrically resolved microwave radiometry to 1. search for thermal anomalies; 2. investigate variations of the temperature with altitude where topography is available; 3. inv...
Jan 25, 2024 · Envision is an ESA-led mission in partnership with NASA. NASA is expected to provide the VenSAR (Synthetic Aperture Radar) instrument, as well as Deep Space Network support. The other payload instruments are contributed by ESA member states, with ASI, DLR, BelSPO, and CNES respectively leading the procurement of the Subsurface Sounding Radar (SRS) and the VenSpec-M, VenSpec-H and VenSpec-U ...
EnVision payloads and experiments. The EnVision mission will embark 5 instrumets and one radioscience experiment. The instruments and the experiment, using the Satellite radiolink, are designed to observe different parts of the Venus system. Venus Synthetic Aperture Radar (VenSAR)
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Jun 10, 2021 · Envision is an ESA-led mission with important contributions from NASA, which will provide VenSAR (Synthetic Aperture Radar), as well as Deep Space Network support. The other payload instruments are contributed by ESA member states, with ASI, DLR, BelSPO, and CNES leading the procurement of SRS (Subsurface Sounding Radar), VenSpec-M, VenSpec-H and VenSpec-U spectrometers, respectively.
