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Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page.

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Presentation on theme: "Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page."— Presentation transcript:

1 Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 1 Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas ERROR ANALYSIS AND ERROR BUDGET PM# April 2006

2 Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 2 DATA FLUXES – STEP 1: Pre processing FEM Analysis Best Fit Procedure Main Reflector Sub Reflector Main Reflector Sub Reflector Receiver Origin of RCS Tiltmeters Other nodes RMS Surface Accuracy Roto -Traslations Metrology Nodes Optical Nodes

3 Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 3 CODEV ray tracing (Centroid analysis) Evaluation Error Pointing Error Residual Delay Metrology Nodes Optical Nodes Errors estimate Error Budget DATA FLUXES – STEP 2: Data analysis Pointing Error Residual Delay + - METYes/No

4 Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 4 FOV origin (Pointing Error = 0) Centroid position (Pointing Error ≠ 0) Centroid (Residual Delay ≠ 0) How CODEV analysis is performed ? Diffraction Image (Optical PSF)

5 Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 5 CODEV ray tracing DATA FLUXES – Example – Wind case #1 FEM Analysis Roto -Traslations Optical Nodes Error Budget


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