Post on 26-Feb-2016
description
ASAC telecon 1
General Activities
Stuartt Corder
April 9, 2014
ASAC telecon 2
Operational Update
• Move to 2 weeks of ES vs 1 week of EOC(extension and optimization of capabilities)/CSV
• Program scientists for EOC in place in Chile: A. Remijan (Lead), C. Vlahakis (Deputy)
• 24 hour operations on the weekend of ES weeks currently best efforts*
• EOC weeks contain 2 days of dedicated “test version” validation for software capabilities
• >=44 Antennas available in at least some bands since March 12
April 9, 2014
ASAC telecon 3
Operational Update
• Special attention being paid to pad readiness:– Priority on Cycle 1+2 extended configuration pads– Next priority given to 12 extended array pads that
are needed for long baseline testing (more later)– Then all pads will be accepted, probably on an on
demand basis– Weekly meetings held with delivering party to
provide updates on progress and schedule
April 9, 2014
ASAC telecon 4
Operational Update
• Relocation/Configuraitons: – April: 32-4; May: 32-5; June: 34-6; July: 34-7*– Have demonstrated 2 relocations in a day regularly
with the same crew – Have demonstrated (recently) 2 relocations and
return to science in the same day– Configuration change planning has improved
dramatically since last year but we are now using new pads again, so it may become more dynamic again
April 9, 2014
ASAC telecon 5
Operational Update
• Problem reporting/tracking– Weekly meetings now between hardware savy astronomers
and engineering to prioritize and interact regarding tough problems
– Plan to have astronomer involvement in twice daily meetings at the site to confirm priority weighting of problems that occur over night• Morning to give initial priority after the night• Afternoon to update new problems and merge them into the queue
– Weekly updates with software to prioritize persistent problems.
April 9, 2014
ASAC telecon 6
Status of Cycle 1
Masao Saito
April 9, 2014
ASAC telecon 7
Progress since last ASAC telecon
• Post the ALMA Status Update document.• ES Blocks 27 and 28 (C32-2/3) conducted• Cycle 1 ES Data reduction keeps going.• New observing block started from Apr 2– 2 week ES blocks and 1 week EOC block– Saturday and Sunday 24hr run with best efforts– Prior to 24 hr run, performance check (pointing
and focus conducted)
April 9, 2014
ASAC telecon 8
Cycle 1 Observation Status• Observing blocks 27, 28 (Mar 5 - 26) successful (3 blocks about one week each in
the period). • Array Elements reached nominal numbers in the last two blocks (~32 or more for
12-m Array Elements (AEs) , ~9 for 7-m Aes), TP mode has not yet passed software acceptance)
• ACA observations suffered from various issues in the blocks 27 and 28 because of invalid optical signals from antennas or mis-operation of resetting ACA correlator.
April 9, 2014
12-m Array
BlockAllocated time (h)(nominal values, will be updated)
Successful executions
(h)# of successful
executions Calibrations
(h)Downtime
(h)Execution efficiency
(%)
Average number of antennas
27 96 48.0 45.0 0.5 13.4 50.5 28.528 96 55.1 47.0 0.4 2.7 57.8 27.7
7-m Array
27 96 64.0 40.0 0.5 4.0 67.2 8.728 96 59.2 41.0 5.7 5.4 67.6 7.5
ASAC telecon 9
Cycle 1 Data ProcessingStatus April 8, 2014
• Manual reduction by staff at JAO and the ARCs
Project View (in total 197 High Priority Projects in Cycle 1):• Number of projects completed: 25• Number of projects partially delivered: 38• Number of projects started: 125 (at least one QA0 pass)
Dataset (OUSs or SBs, one or more each per project) view:• Datasets started to be observed: 64• Datasets finished (fully observed): 258 (passed QA2+being processed+waiting)
• Datasets passed QA2: 153 • Datasets delivered: 143• Being processed: 74• Waiting for staff data reduction assignment: 31
April 9, 2014
ASAC telecon 10
Preparation for 24 hr run
• 24 hr run on Saturday and Sunday.• From 9 am to 5 pm, it is the best effort so
engineering work on individual antennas and front ends are happening.
• Prior to Apr 2, performance test run was performed. Band 3 is ok and Band 6 is ok with caution.
April 9, 2014
ASAC telecon 11
Expected completion of Cycle 1 projects on May 31
• 320 h to transfer to Cycle 2 including all SBs requiring C32-6.
• Expected completion rates of each band are ~70 % (B3), ~60 % (B6), ~40 % (B7), ~25 % (B9)
• Probable better completion rates• With 35-36 antennas, reasonable coverage of two
array configurations. • Daytime observations covering the whole LST
range.April 9, 2014
ASAC telecon 12
Cycle 2 Readiness
Stuartt Corder
April 9, 2014
ASAC telecon 13
Software
• ~3 online problems remain that are critical for acceptance (1 likely solved)
• Other major items are resolved• Acceptance testing scheduled for week of April
22nd provided progress is made on remaining issues.
• Acceptance planned for end of May in preparation for June 2 start to Cycle 2 (June 1 is a EOC/CSV day)
April 9, 2014
ASAC telecon 14
Antennas/Receivers
• Goal of 45 antennas in use each night more or less regularly achieved in some bands
• Focus now on making the 45 antennas robust and having 45 at all bands
• Band 4/8 installations are at ~30, i.e. half the array. Schedule to complete all with 4/8/10 by Dec/Jan (4 are added each month on average)
April 9, 2014
ASAC telecon 15
Antenna Stations/Power/Weather
• Readiness of remaining extended configuration Cycle1/2 stations underway (about 16 remain for Cycle 1, 10 more for Cycle 2)
• Remote power recovery installed and functional on all stations in inner 3 of 6 configurations for Cycle 1
• Project defined and initiated for remote start on all stations
• Snow plow on site and installed
April 9, 2014
ASAC telecon 16
Cycle 3 Activities
Stuartt Corder
April 9, 2014
ASAC telecon 17
Recent Activities
• Focus has continued to be on readiness for software acceptance of the online system
• Session (recycled calibration) work in final testing phase
• Calibration stability (amplitude/bandpass) analysis nearly complete
• Speeding up the calibration of the correlator for the ACA
• Single dish validation still on goingApril 9, 2014
ASAC telecon 18
Current Activities: April/May (start 1 week in 3 available)
• Close out of single dish validation• Pre-tests for high frequency focus:– 90 deg switching (when unblocked)– Differential Gain Calibration (band to band transfer,
etc)– Fast focus full validation
• High precision ephemeris checks• Single dish rework planning• Observing modes meeting for Cycle 3 next week
April 9, 2014
ASAC telecon 19
Focused Campaigns
• High Frequency: June-August– Local lead: Takahashi– Detailed plan being prepared, folding in ACR
support and missions– Configuration changes in June-August optimized to
provide band 10 equipped antennas near the ACA– Goal: Improved approach to observing and
calibration at bands 9 and 10 as well as potentially low transparency parts of bands 7 and 8
April 9, 2014
ASAC telecon 20
Focused Campaigns• Single dish rework:
– Plan being defined to improve the overall performance of single dish
– Fast scanning delivered in November should allow better calibration and single dish continuum observations.
– Will include schedule for single dish sideband separation (this will likely compete with the high frequency campaign and may be in conflict, preference is given to interferometric improvements)
– Goal: A better single dish approach that utilizes more valid techniques and lessons learned in the previous approach. This will include more optimized observing efficiency.
April 9, 2014
ASAC telecon 21
Focused Campaigns• Long Baselines: September-November
– Local lead: Fomalont– Experts from the executives are being invited to participate for
specific areas (based on expertise or previous contributions)– Plan for configuration and timing done– Plan for detailed breakdown of tasks to be discussed in late May.– SV proposed sources not yet available (coming soon0– Station readiness is being tracked in weekly meetings– Goal: Statements about the long baseline performance, weather
requirements, and calibration needs. Should conclude with a set of requirements of restrictions for the Cycle 3 call for proposals (bands, lengths, etc) and a general calibration approach (fast switching, etc)
April 9, 2014
ASAC telecon 22
Focused Campaigns
• ALMA Phasing Project:– Local Lead: Not yet identified– Test time being discussed for software side tests.– Time agreement made with APP pending hardware
acceptance and software readiness• Solar: December– Initial tests for improved approach being conducted
now.– May not be included in Cycle 3 call but would do a
broad science verification campaign for 2015.
April 9, 2014