Download Power Point Kickoff Mtg

Image Quality Upgrade Kickoff
Meeting
Daniel O’Connor
August 6, 2002
GOAL: Make the IRTF a
Telescope which is
atmosphere seeing limited
Part I.
Improve HVAC System (TB)
 Monitor Dome Environment (DYW)
 Provide Routine Image Quality
Assessment (DOC)
 Characterize Static Optics of Telescope
(DOC)
 Provide WEB based Documentation
(DOC)

Individual Presentations
Tim - HVAC
 Darryl – Monitoring System
 Miranda – Software, WEB
 Dan – all else

HVAC UPGRADE
GOAL : To have an operational HVAC
system in place, with the capability to
set the dome thermal environment to a
temperature specified by the operator.
That temperature will be based on
predictions as to what the outside
temperature will be during that evenings
observing run.
HVAC : History
Hired consultant to make
recommendations.
 Recharged refrigeration circuit.
 Replaced compressor.
 Simplified system circuitry.
 Misc. smaller items.

HVAC : Dome Seals
Air infiltration is currently overwhelming
the HVAC system.
 Dome Skirt
 Dome Slit (sides)
 Dome Slit (top)

HVAC : Primary Cooling
Makes sense to concentrate cooling
effort where it is required the most.
 May be possible to utilize coude loop
hardware in primary mirror cooling
scheme.

HVAC : Misc. High Priority Items
Need to specify, order, install, and
calibrate several temperature sensors,
and flow meters.
 Install air bleeds in coude loop.
 Install defrost circuit in coude loop
 Install air separator.

HVAC : Medium Priority Items
Implement a control system.
 Examine machinery room ventilation.
 Determine exhaust tunnel utilization.
 Install Expansion Tank
 Adjust Dome Louvers

HVAC : Low Priority Items
Overall System Documentation
 Emergency Shutdown Procedures
 Staff Training

HVAC : Schedule

Blah, blah
HVAC : Schedule
Monitoring Dome Environment
The goal is to be able to accurately monitor
and record the temperature and humidity of
our dome/telescope environment
Use existing Johnson Controls temperature
and humidity sensors in dome ceiling
Install new sensors external to dome, on the
telescope, and on primary mirror
Warning ‘pop-up’ message on operators screen
to notify of potential risk to optics
Archive database and make web accessible
Sensors
Johnson Controls Sensors
Vaisala Sensors
Omega PT100 Sensors
Data Monitoring Hardware
LakeShore 218E Monitor
Omega DP472
2’ T
Internal
Dome
Sensors
T
20.5’
T
33’
33’
H
45.5’ H
T
T 45.5’
T
2’
2’
T
45.5’
H
33’ T
T
20.5’
T
T 2’
33’
External Dome Sensors
H
T
T
Dome and External Sensor Locations
T
H
T
T
H
H
T
T
T
H
T
T
T
T
T
T
T
Telescope/Mirror
temperature
sensor locations
T
T
T
T
T
T
T
T
T
T
T
T
Dew Point Monitoring
Future installment of cooling
the primary mirror will put higher
risk of dew and frost forming
Purchase of a Vaisala HMP243
module and mount near primary
Calculate the dew point using our humidity
and temperature sensors
Warning ‘pop-up’ message on operators screen
to notify of potential risk to optics
Data
Acquisition
Schematic
Telescope
J.C.
Humidty
Sensors
LakeShore
218E
Dew Pt. Mon
Mirror
Mounted
Sensors
PT100
LakeShore
218E
RS232
Digi
Portserver
#1
RS232
Network
RS232
Omega
DP472
Vaisala
Humidity
Temp
Sensors
J.C.
Temp
Sensors
Telescope
Mounted
Sensors
PT100
RS232
RS232
MUX
MODEM
LakeShore
218E
AC
MODEM
Slip Ring
AC Power
AC
MODEM
Dome
MODEM
MUX
RS232
Dome Floor
Mounted
Sensors
PT100
LakeShore
218E
Building
RS232
RS232
Wind
Speed/Direction
RS232
Digi
Portserver
#2
Network
Slip Ring
Monitoring and Web Software
Miranda Hawarden-Ogata, Albert Fhema

24 hour monitoring of all dome and telescope sensors, with data
to be archived.

GUI to notify telescope operators and IRTF staff of critical
environmental changes in the dome.

Static web pages to display the collected dome environment
data plots.

Real-time web pages to display current dome environment data.

Interactive web pages to display selected dome environment
data.
Monitor System
Collect Data
Monitoring
Overview
Filter Data
Display for TOs
Archive Data
Web Display
2’ T
Birds’ eye
view of
existing
sensors
T
20.5’
T
33’
33’
H
45.5’ H
T
T
2’
2’
T
All sensors not
mounted on the
telescope itself or
outside the dome
will be displayed
on this web page.
T 45.5’
45.5’
H
33’ T
T
20.5’
T 2’
33’
Sensors mounted
on telescope and
mirror
T
T
T
T
All sensors mounted on
the telescope itself will
be displayed on this web
page.
T
T
Additional information
will be displayed at the
bottom of the sensor
web pages.
T
T
T
T
T
T
T
3.) Provide Routine Image
Quality Assessment

GOAL: Build an auto-focus system for
use with NSFCam and SPeX to provide
and automated estimate of focus for the
observer, and provide routine
assessment of image quality.
3.) cont. Advantages of AutoFocus
Observer spends less time focussing
 Will focus more often (its easier)
 Will provide consistent data on FWHM
and Strehl, not subjective

Auto-Focus Schematic
NSFCam
SPeX
HEXAPOD
Take Image
READ FOCUS
WRITE FOCUS
HEXAPOD DAEMON
IDL Fit Routine
FWHM, Strehl, Image, Fit
GUI
Storage
IQ Archive
Best Fit Focus
3.) cont. Focus Update

After A-F working, develop procedure to
do Focus Update based on temperature
model of telescope truss.
4.) Characterize Optics of
Telescope

Goal: Understand factors in the
telescope optics and mirror support
system that limit image quality
4.) cont. TASKS
Hire Optical Consultant
 Measure Primary and Secondary
Mirrors with interferometric technique
 Provide measurement of contribution to
error budget
 Produce final report

5.) Provide WEB based
Documentation
Integrated WEB site for IQUP
 Dedicated page for each sub-project

Schedule / Manpower