**************************************************************************** DRAFT SCIENCE IPT MILESTONES ============================ *** draft 2: updated after discussions in Tucson *** draft 3: minor changes added after Garching Nov. 7 *** draft 4: changes by HAW & EvD 6 December after e-mails *** draft 5: changes by BJB 2003Jan22 after calibration group telecon on 2002Dec16, and Leiden meeting (joint ALMA/HIFI calibration meeting) name abbreviations: MH = Mark Holdaway JC = John Conway SG = Stephane Guilloteau BB = Bryan Butler JRP = Juan Ramon Pardo AB = Aurore Bacmann SM = Steve Myers JM = Jeff Mangum DB = Douglas Bock BG = Brian Glendenning MC = Matt Carter JW = Jack Welch AW = Al Wootten JP = Jerome Pety PC = Jose Cernicharo RL = Robert Lucas ED = Ewine van Dishoeck JR = John Richer RH = Richard Hills TH = Tetsuo Hasegawa KM = Koh-ichiro Morita AD = Anne Dutrey FG = Frederic Gueth SR = Simon Radford LN = Lars-Ake Nyman AO = Angel Otarola JPP = Juan Pablo Perez FR = Fred Rantakyro RR = Roberto Rivera CB = Carla Beaudet GW = Galen Watts JMP = Jesus Martin Pintado I. Configuration =============== A. Level 2: October 2002 JC Plan for compact and intermediate configurations delivered. B. Level 2: June 2003 JC/MH/AO Plan for all configurations, including Y+ configuration finalized. 1. Level 3: March 2003(?) MH/JC/AO Logic of antenna motion investigated, including not only Y+, but intermediate configurations, incorporating constraints from scheduling and stringency. The logic of antenna motion will be confronted with site characterization data to refine it. 2. Level 3: March 2003 JC First revised configuration (pad position) plan delivered, including considerations from site pad position survey, road and power/fiber conduit design plan, and imaging re-optimization given these considerations. C. Level 2: June 2004 JC Plan for Early Science configurations complete. 1. Level 3: February 2004 JC Draft plan for Early Science configurations II. Calibration =============== A. Level 2: February 2003 BB Review of calibration requirements with science examples complete. This includes: phase, amplitude, bandpass, polarization, antenna location, illumination offset, pointing, focus, delay, opacity, and decorrelation correction. 1. Level 3: December 2002 SG Draft of requirements document ready for reviews. This is a modification of chapter 3 of the Project Book, complete with scientific examples for drivers. B. Level 2: June 2003 BB Review of how calibration requirements trickle down to instrumental specifications, including special calibration devices (loads for amplitude calibration, possible photonic transmitter in subreflector, WVR, FTS, weather station, etc...). 1. Level 3: February 2003 JRP ATM software available (executable only). 2. Level 3: March 2003 JR/RH/JRP/JMP Draft specifications for calibration devices ready for reviews. There will be separate specs for devices to be tested on the ATF interferometer. See Memo 303 for technical spec for the WVRs. C. Level 2: September 2003 BB Calibration strategy finalized. 1. Level 3: March 2003 SG Draft of bandpass calibration plan a) Level 4: February 2003 AB Memo describing limitations of bandpass calibration using astronomical sources. 2. Level 3: March 2003 AW Draft of phase calibration plan a) Level 4: February 2003 MH Check fast switching performance of antennas with antenna evaluation group (AEG) b) Level 4: February 2003 JR/RH/JRP WVR/atmospheric modeling with ATM software to answer questions like: "are four channels enough?". c) Level 4: February 2003 BB Links with other instruments (SMA, OVRO, BIMA, ATCA, IRAM, VLA, NMA, etc...). 3. Level 3: March 2003 SG Draft of amplitude calibration, including single dish. a) Level 4: February 2003 SM(?) Analysis of dual load in the subreflector. i) Level 5: February 2003 JM/DB/JW Evaluation of the Berkeley/BIMA experience ii) Level 5: July 2003 ?? Baseline design for this system finished iii) Level 5: ???? SM/BG(?) Implications on operations/data acquisition, including synchronizing phase with observations on 64 antennas all at once (with receiver IPT, software IPT, and backend IPT). b) Level 4: February 2003 SG/JMP Analysis of semi-transparent vane. i) Level 5: January 2003 MC Design and test in lab ii) Level 5: March 2003(?) JMP/SG/MC Test design on IRAM 30m c) Level 4: February 2003 JM/SG/JMP Analysis of need for a hot load d) Level 4: January 2003 BB/SG/JMP Analysis of "absolute" calibrators, including planets, asteroids, others (MWC 349) e) Level 4: March 2003(?) BB/JW Analysis of absolute techniques (using a well-calibrated horn on the side of the antenna, as JW has done at BIMA to measure Jupiter and MWC 349) i) Level 5: March 2003(?) BB/JW/SG 90 GHz horn built, measured at IRAM or GaTech f) Level 4: March 2003 SG/AW Link with other instruments (SOFIA, Herschel/HIFI, etc...) i) Level 5: December 2002 SG/AW/BB Report on EU Workshop in Leiden g) Level 4: February 2003 MH Analysis of decorrelation correction h) Level 4: March 2003(?) MH/JP Single dish simulations, for total power stability, 1/f noise, saturation, comparison of OTF with beam-switching, etc... (with receiver IPT). 4. Level 3: March 2003 SM Review SSR plan for all phase calibration techniques complete 5. Level 3: March 2003 JC Draft of antenna location determination/calibration plan, including consideration of using phase vs. delay, the geometric model (tides, antenna motions, etc...), frequency of solutions, bootstrapping new antenna pads, etc... (with antenna IPT and software IPT) a) Level 4: February 2003 MH Report on effect of and correction for illumination offset 6. Level 3: March 2003 SG/AB Draft of delay calibration plan. 7. Level 3: March 2003 JM Draft of antenna global pointing model determination plan 8. Level 3: March 2003(?) JM/RL/PC Draft of reference pointing and focus calibration plans a) Level 4: March 2003(?) JM Report on results from ATF tests NOTE - depends on ATF schedule 9. Level 3: April 2003 SM/MH Draft of polarization calibration, including required feed polarizations (linear [same or different PA?], circular, mixed?), and special device needs and descriptions (e.g., photonic transmitter in subreflector, quarter-wave plates, etc..., as function of wavelength). 10. Level 3: March 2003 SG/AW/ED Draft of operational model for calibration, including ideas on sequence of moves and calibrations, dynamic scheduling, and number of antennas needed in 'calibration subarrays' (e.g., when determining antenna location for a newly moved antenna, how many antennas in total are needed?). 11. Level 3: June 2003 SG Revised bandpass calibration plan 12. Level 3: June 2003 AW Revised phase calibration plan 13. Level 3: June 2003 SG/JMP Revised amplitude calibration plan, including single dish. 14. Level 3: June 2003 JC Revised antenna location determination/calibration plan, 15. Level 3: June 2003 SG/AB Revised delay calibration plan. 16. Level 3: June 2003 JM Revised antenna global pointing model determination plan 17. Level 3: June 2003(?) JM/RL/PC Revised reference pointing and focus calibration plan 18. Level 3: June 2003 SM/MH Revised polarization calibration plan 19. Level 3: July 2003 BB Complete draft report on calibration strategy for review 20. Level 3: Q3 2003 JM/JMP Test plan for amplitude calibration devices on ATF 21. Level 3: August 2004 many First fringes on ATF interferometer D. Level 2: September 2004 JR/RH/MH/JRP Report on possible WVR strategies We need a calibration group meeting to discuss this further. How and when do we use the WVR; is it used as a tipper, tau accuracy, use as function of location on site. 1. Level 3: February 2003 RH/JR Draft technical aspects WVR (with Receiver IPT) 2. Level 3: Q2 2003 JR Report on feasibility/usefulness of WVRs on ATF interferometer 3. Level 3: March 2004 RH/JR/MH/JRP Draft WVR software implementation plan, including capabilities as tau-meter E. Level 2: December 2004 BB(?) Review of tests of calibration strategies on prototype interferometer complete with evaluation receivers. 1. Level 3: June 2004 MH Comparison of results of beam switching and fast scanning on prototype antennas, including tests of OTF motion and antenna position readout 2. Level 3: June 2004 JM(?) Characterization of prototype antenna pointing under varying wind conditions F. Level 2: May 2005 BB(?) Review of tests of calibration strategies on interferometer at ATF complete with ALMA prototype receiver, including how the results of these tests affect plans for ALMA mosaicing and submillimeter imaging 1. Level 3: January 2005 MH Tests of dynamic scheduling on interferometer at ATF. 2. Level 3: March 2004 JM Plan for interferometry tests at ATF complete 3. Level 3: August 2004 JM Start of interferometry tests at ATF III. ACA definition ================== This is not part of the baseline bilateral plan, but the science IPT will probably be asked to do some work 1. Level 3: March 2003 ?? Draft plan on how to achieve ACA goals (flux-recovered imaging at all ALMA bands) a) Level 4: ???? MH Report on surface error simulations b) Level 4: ???? JP/JC/TH Report on configuration optimization c) Level 4: ???? KM Report on extreme zenith angle coverage 2. Level 3: Q3 2003 KM/SG/AW/ED Report demonstrating that the proposed plan achieves the goals, and describing implementation of the plan. This involves other IPTs: Antenna, systems, receiver, backend, etc... 3. Level 3: ???? SG/KM Report on ACA calibration aspects IV. Operations plan ================== A. Level 2: December 2003 SG/AW/ED/AD Science aspects of operations plan complete, including core functions of Regional Support Centers 1. Level 3: June 2003 SG/AW/ED/AD Draft of science aspects of operations plan, including staffing plan (with input from ASAC) V. Science Commissioning and Science Verification [N.B. Systems assures specifications are met during integration, science confirms afterwards.] ================ A. Level 2: June 2005 SG/AW/ED Science verification plan finalized 1. Level 3: December 2003 JM/AD/SG/AW/ED Draft of science verification plan 2. Level 3: June 2004 Revised plan for science verification, including separate plans for each receiver band, and plans for mosaicing verification. B. Level 2: June 2007 SG/AW/ED Science verification of ALMA early science array with Bands 3 and x complete *** assumes Band 3 and at least one other Band commissioned *** 1. Level 3: TBD C. Level 2: ???? 2008: SG/AW/ED Science verification of ALMA Bands y and z complete *** verification of any bands not included in early science array *** 2. Level 3: TBD VI. Imaging ================================= A. Level 2: ???? 2009: FG/MH/JP Science verification of ALMA imaging quality complete *** need ALMA with at least 32 antennas *** 1. Level 3: June 2005 FG/MH/JC/JP Review existing algorithms and define what is needed in terms of algorithms, including optimization of existing algorithms and development of new ones. 2. Level 3: June 2006 FG/MH/JP Imaging - Calibration - Pipeline Integration Integration of the astronomical imaging goal with the proposal process, scheduling process, and the imaging pipline. 3. Level 3: ???? 2008 MH/FG/JP Verification of mosaicing process with ALMA VII. Site Characterization ================================= A. Level 2: 2006 January. Definition of site characterization instrumentation for ALMA operations in consultation with Calibration group. B. Level 2: 2006 January SR/LN Ongoing site characterization. 1. Level 3: Site monitoring. Ongoing. SR/RR/FR 2. Level 3: April 2003 SR/RR Integration of NA and EU data into uniform and easy-to-access forms 3. Level 3: April 2003 SR/RR Description of current and past instruments, data, analysis, including description of data location and format. 4. Level 3: July 2003 BB/AO Radio sonde data analysis, including description of equipment, sonde campaigns, analysis, results summary, and conclusions about atmospheric structure above the site. Also includes recommendations for future needs (e.g., more campaigns?). Should be published as a ALMA Memo and/or an article in a scientific Journal. 5. Level 3: July 2003 BB Report on analysis of high precision hygrometer measurements. 6. Level 3: July 2003 FR/JPP/RR/LN/JR Report on phase correction analysis using interferometer and radiometer data. Concludes and extends work of Guillermo Delgado. Two ALMA Memos will be produced, one that focuses on calibration effects (draft was written by Guillermo Delgado) and another that includes an updated and expanded study of phase correction. 7. Level 3: December 2003 FR/JPP/RR/LN/JR Report on height of turbulent layer using interferometer and radiometer data. Compare with radiosonde data. Will be published as an ALMA Memo. 8. Level 3: Mid 2003 AE Report on accuracy of mesoscale atmosphere models and applicability to dynamic scheduling. Wait for results presented by A. Erasmus (under contract with ESO). 9. Level 3: - Report on use of surface weather data for dynamic scheduling Proposal received from AO/MH and forwarded to the project scientists for review. Available resources cannot support proposal. 10. Level 3: June 2003 SR Report on RFI environment at Chajnantor a) Level 4: December 2002 RFI measurements at Chajnantor VIII. Science Software Requirements ================================= The SSR reports to the Software IPT and thus has to follow their milestones. However, we feel that it is important that the SSR liaison scientists report regularly to the Science IPT as well. Do we want to set or copy any Level 3 milestones relevant to science?