31, October 2019

ESA Open Invitation to Tender AO10009
Open Date: 28/10/2019
Closing Date: 09/12/2019 13:00:00

Status: ISSUED
Reference Nr.: 19.1EP.11
Prog. Ref.: Technology Developme
Budget Ref.: E/0901-01 – Technology Developme
Tender Type: C
Price Range: 100-200 KEURO
Products: Satellites & Probes / System Engineering Software / Environment Models and Computational Tools / Radiation belts, Solar energetic particles, Galactic cosmic rays, ¿
Technology Domains: Spacecraft Environments and Effects / Space Environment / Numerical modelling of environments
Establishment: ESTEC
Directorate: Directorate of Tech, Eng. & Quality
Department: Electrical Department
Division: Power Systems, EMC & Space Environ.Div
Contract Officer: Karl, Heinz-Uwe
Industrial Policy Measure: N/A – Not apply
Last Update Date: 28/10/2019
Update Reason: Tender issue

Uncertainties on atmospheric densities and temperatures are major risk drivers for atmospheric entry and orbital maneuvers such as aerobraking or aerocapture. The EnVision mission scenario foresees orbit perigee lowering down to about 140km using aerobraking. Europe has gained a good expertise during the Venus Express mission, however there is no easily accessible model not to say engineeringmodel to rely on for mission design at Venus. In comparison the Venus – GRAM model is developed and maintained by NASA MSFC. This study will target the development of an engineering model from at least the cloud top at 70km to the exosphere at Venus based on the combination of existing Global Circulation Model(s) and exospheric models developed in Europe. This shall be validated using Venus Express data (in particular densities and temperatures where available) during aerobraking.

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