Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 1 Site Evaluation and Selection R.J. Wainscoat - task manager M. Waterson - Haleakala studies M. Chun – Mauna Kea studies

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 2 Site Selection Objectives Make scientific case for final location of PanSTARRS Determine environmental parameters for facility design Determine environmental and climatological factors affecting scheduling, operations and science Develop documentation for EIS

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 3 Study areas Climate study –Analyze existing weather data archives to compare seasonal and mean overall conditions for impact on facility and operations Sky Transparency and clear fraction analysis –Locate ConCam all-sky camera units at both mountains Seeing measurements –Simultaneous observations on both mountains with DIMM telescopes, comparison with extant seeing data Light Pollution analysis –Digital imaging of night sky to determine extent –Quantitative comparison of Haleakala with Mauna Kea Lunar SHABAR measurements –Probe of boundary-layer seeing effects

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 4 Climate Study Maui study (sub to KC environmental) 90% complete –Analysis of 5 year CAPS and summit weather data archive by year and month/season Base weather synopsis – (Wind, temperature, humidity, rainfall) Cloud cover estimate from IR sensor ( + day from solar flux as a check) Boundary-layer height Synoptic seeing from AHAC DIMM data

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 5 Mean temperature and humidity CAPS Humidity Variation by Month ( ) CAPS Temperature Variation by Month ( )

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 6 Cloud cover from IR sensor Sensitivity to cloud passage Probability across entire year

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 7 ConCam Fisheye CONtinuous CAMera located on Mauna Kea NSF/Michigan State Univ. sponsored Unit for Haleakala to be deployed Q204

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 8 Seeing measurements 2 CTIO/Gemini DIMM instruments available for first half of aperture system using 10" Meade, SBIG ST-237 camera Operators trained and running 3 full nights/wk from mid-Jan Limited data to date

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 9 DIMM Instrument Locations Maui DIMM tripod looking toward future PS-1 UH 2.2m Coude Room (at CTIO)

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 10 DIMM Data 20 Jan - 13 Feb 2004 Fewer Maui points: –Rain/fog (3 nights) –Wind buffeting –Feb16-20 data to be added 8 of 12 nites red Wx (both sites) Work underway to correlate with AHAC DIMM

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 11 Lunar SHABAR SHAdow-BAnd Ranging - measurement of height-resolved seeing Uses an array of scintillation detectors illuminated by an extended object Developed for Solar use (J Beckers, 2002) Kaiser/Kuhn analysis extends technique to Lunar illumination Prototype sensor unit being built on Maui Will provide ~meter-resolution probe of boundary layer to several hundred meters -> boundary height impact on PS1, seeing scale data for tuning OT performance

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 12 SHABAR details Solar SHABAR instrument

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 13 Light Pollution Light pollution impact expected to be worse on Maui (more people closer) No definitive measurements to date Plan to acquire wide-angle digital images of horizon over 3 week periods at both sites Process to determine quantitative background levels ConCAM data should provide further info

Pan-STARRS UH-IfA Pan-STARRS PY2 EOC Review #1 1-2 March 2004 U NIVERSITY OF H AWAII I NSTITUTE FOR A STRONOMY Approved for Public Release - Distribution is Unlimited 14 Updated Milestones Jan 04 DIMM runs started Jun 04 Seeing data collection complete Mar 04 Climate study complete Feb- Mar 04 Shabar prototype tests Apr-Jun 04 Shabar data collection Mar-Apr 04 Light-pollution measurements Jul 04 Site Report Jun – Nov 04 EIS studies Nov-Jan 05 Final site trade study & selection