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ALMA Integrated Computing Team Coordination & Planning Meeting #3 Socorro, 17-19 June 2014

This presentation provides an overview of the TelCal group's resources, current status, and plans for future releases. It includes information on team members, calibration code, TelCal tasks, and the major role of the Subsystem Scientist. It also discusses the features delivered in previous releases and improvements planned for the next releases.

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ALMA Integrated Computing Team Coordination & Planning Meeting #3 Socorro, 17-19 June 2014

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  1. ALMA Integrated Computing TeamCoordination & Planning Meeting #3 Socorro, 17-19 June 2014 Telescope calibration Planning Dominique Broguière

  2. Presentation overview • Ressources : TelCal group • Current status • Plan for next releases (2014.4 and 2014.6) • Future releases (2015)

  3. ICT TelCal : 1.3 FTE (1.0 FTE in 2015) Dominique Broguiere, lead, 0.8 FTE Calibration code, TelCal CORBA components, support Jean-Christophe Roche, developer, 0.5 FTE TelCal Standalone build, TelCal Tasks user interface Subsystem scientist Denis Barkats Major role to define priorities and discuss calibration algorithms Other contribution Robert Lucas Holography package Scientific support TelCal group

  4. Two “online” releases since ICT-CPM2 : ALMA-10.8 and 2014.2 from JIRA, new features or improvements (excluding APP) : 15 from JIRA, bugs fixed : 12 investigations done in several other tickets, finally assigned to CONTROL or ACS Testing Still based on unit tests in each TELCAL module Results of daily build/test on NRI machines useful to track build problems and errors resulting from changes in the code Current status

  5. TELCAL build procedure changes TelCal-online : using new CASA module in ICD TelCal-standalone : using a complete CASA distribution (including tasks), without CASA_ROOT defined Performance improvements Atmospheric calibration parallelized Optimizations in ATM code and in some “offline” tasks Features delivered in R10.8 and 2014.2 : general improvements

  6. TelCal Performances measured in R10.4 42 antennas Analysis done from TelCal cppcontainer log, recorded on 2014 January 30, at AOS Dataset: uid___A002_X7a0472_Xe7 More details on https://ictwiki.alma.cl/twiki/bin/view/TelCal/TelCalPerformances20140130

  7. Online WVR correction TelCal online can process both wvr-corrected and wvr-uncorrected data for all engines TelCal offline : option added in tc_antpos and tc_focus to select wvr-corrected or uncorrected data Polynomial interpolation inside receiver band provided for path coefficients Features delivered in R10.8 and 2014.2 :WVR correction

  8. Sideband ratio measurement Realistic default values introduced for high frequency bands (8 and 10) Results displayed by TelCalSpy Holographic focus Fill new columns in CalFocus table (astigm+ , astigmx, IllumOffset) and use new enumerations in result Process polarizations separately if required Process both wvr-corrected and uncorrected data Atmospheric calibration TotalPower data : use zero level of previous scan if not measured in the considered scan Features delivered in R10.8 and 2014.2 :Engines improvements

  9. TelCal-offline User interface improvements list of scans/ antennas defined with the same syntax as CASA asdmlist displays more information Stop storing individual Cal results in Archive Features delivered in R10.8 and 2014.2 :Other improvements

  10. Long baseline campaign Improvements foreseen in two areas Baseline measurements (tc_antpos) Online wvr correction Several ideas discussed during June workshop Flags Ensure that TelCal takes into account all significant flags from Flag table in all engines Dual-band observations Ensure that TelCal uses the right results for each band (for example, the right sideband ratio for an atmospheric calibration) Sideband ratio with 90 degrees phase switching Plan for next releases (2014.4 or 2014.6)

  11. TelCal-offline Plots improvements Redhat 6.5 porting Main change related to gfortran which should replace g77, f90 and g95 currently used in TELCAL Porting started in April but stopped due to a blocking issue with libgfortran, which should be solved with CASA built within ALMA build system Plan for next releases (2014.4 or 2014.6)

  12. Features depending on Control schedule Shadowing flag Scan sequence with interspersed telescope calibration Provide a method to CONTROL, that returns an evaluation of computing time for each calibration Dual mode sharing data (totalpower and correlator data) in the same TelCal component to improve atmospheric calibration Error calculations Automatic flagging of noisy basebands or polarizations Future releases

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