THEMIS/GBO CDR 1 UC Berkeley, June 17, 2004 Ground Based Observatories (GBO) CDR S. B. Mende...
-
Upload
betty-edwina-cobb -
Category
Documents
-
view
215 -
download
0
Transcript of THEMIS/GBO CDR 1 UC Berkeley, June 17, 2004 Ground Based Observatories (GBO) CDR S. B. Mende...
THEMIS/GBO CDR 1 UC Berkeley, June 17, 2004
Ground Based Observatories (GBO) CDR
S. B. Mende
University of California - Berkeley
THEMIS/GBO CDR 2 UC Berkeley, June 17, 2004
GBO Team Institutions
University of California – Berkeley (UCB)• S. B. Mende – GBO science lead
• Provides ASI development, system engineering, GBO system fabrication and construction, data archive and dissemination
University of California – Los Angeles (UCLA)• C. T. Russell – magnetometer science lead
• Develop and provide ground magnetometer and GPS for GBO / EPO
University of Calgary• E. Donovan – Canadian science lead
• Providing GBO system deployment in Canada, field management, data collection, development participation
University of Alberta• I. Mann – magnetometer scientist
• Providing access to Canadian magnetometer network
THEMIS/GBO CDR 3 UC Berkeley, June 17, 2004
Detailed Peer Review was conducted on the 26th and 27 th of April in Calgary, Canada.
Peer Review Panel consisted of technical specialists:
Dr. Michael Lampton, UCB acting chair, currently senior scientist with Super Nova Acceleration Program working at the Lawrence Berkeley Laboratories.
Dr. Hans Nielsen, University of Alaska, scientific project leader on several ground and aircraft based auroral observing programs.
Dr. Jeff Baumgardner, Boston University, instrument scientist on optical aurora and airglow programs
Mr. R. Sterling, UCB lead engineer on the Antarctic Automatic Observatory Refurbishment Program
NASA representatioves: Bill Davis, Dennis S. Lee, Frank Snow and John Thurber
Peer Review preceding CDR
THEMIS/GBO CDR 4 UC Berkeley, June 17, 2004
THEMIS Ground Based Observatories: RFAs Approved
Review held 26-27 April 3004RFAs submitted to Board 7 June 2004RFAs reviewed and approved 9 June 2004
Review board membership:Jeff Baumgardner, BUMichael Lampton, UCB *acting chairHans Nielsen, GI/UofARick Sterling, UCB
NASA Program Office RepresentativesBill DavisDennis S LeeFrank SnowJohn Thurber
The presentations on the various aspects of the GBOs (science, design, heritage,deployment, E/PO, etc) were well prepared and gave a complete picture of the status ofthe GBO effort. During the April review, six Requests for Action (RFA) were generated.Since then, the GBO team formulated responses to these Requests, in the form of plansand other explanatory material, which were submitted to this Board for approval.
The reviewers unanimously concur that the GBO team has satisfactorily resolved eachRFA.
This Board congratulates the GBO team for their thorough planning and thanks them fora successful review.
Recent Comment from Dr. Michael Lampton chairman of the peer review board:
THEMIS/GBO CDR 5 UC Berkeley, June 17, 2004
GBO / UCB Organization
GBO Lead Co-InvestigatorS. B. Mende
510-642-0876
GBO Lead Co-InvestigatorS. B. Mende
510-642-0876
AdministratorYaling Zhu
510-643-5176
AdministratorYaling Zhu
510-643-5176
Project ManagerS. Harris
510-643-3395
Project ManagerS. Harris
510-643-3395
Test & Verif.H. Frey
Test & Verif.H. Frey
System Eng.S. Harris
System Eng.S. Harris
MechanicalG. Dalton
MechanicalG. Dalton
SoftwareS. Geller
SoftwareS. Geller
AssemblyB. Dalen
AssemblyB. Dalen
Electrical TestW. Rachelson
Electrical TestW. Rachelson
UCB Organization
THEMIS/GBO CDR 6 UC Berkeley, June 17, 2004
GBO/EPO Magnetometer Organization
Lead Co-InvestigatorC. T. Russell310-825-3188
Lead Co-InvestigatorC. T. Russell310-825-3188
R & QAD. Dearborn310-825-1488
R & QAD. Dearborn310-825-1488
Business OfficeJ Nakatsuka310-825-3939
Business OfficeJ Nakatsuka310-825-3939
Program ManagerD. Pierce
775-588-0356
Program ManagerD. Pierce
775-588-0356
MagneticsR. Snare
MagneticsR. Snare
AnalogD. Pierce
AnalogD. Pierce
MechanicalG. Barr
MechanicalG. Barr
DigitalD. Dearborn
DigitalD. Dearborn
AssemblyW. Greer
AssemblyW. Greer
UCLA Organization
THEMIS/GBO CDR 7 UC Berkeley, June 17, 2004
GBOs: A synoptic view of the aurora
Major Science objective is to locate and time the substorm onset as seen at ground level. At onset the aurora intensifies and expands and the magnetic field caused by the ionospheric current intensifies.
Global auroral image taken by IMAGE WIC.
Proposed THEMIS GBO sites superimposed.
THEMIS/GBO CDR 8 UC Berkeley, June 17, 2004
GBO Site Locations
IMAGE FUV substorm onset identification.Of events indicated within GBO longitude sector, 2% are outside the latitude covered
THEMIS/GBO CDR 9 UC Berkeley, June 17, 2004
GBO Science Objective
GBO shall monitor the auroral light and ionospheric currents across North America in order to localize the time, location, and evolution of the auroral manifestation of the substorm.
Themis mission requirement relating to GBO: Determine substorm onset time and substorm meridian magnetic local time (MLT) using All Sky Imagers (one ASI per MLT hr) and Ground Magnetometer (two GMAG per MLT hr) with t_res<30s and dMLT<1° respectively, in an 8hr geographic local time sector including the US.
THEMIS/GBO CDR 10 UC Berkeley, June 17, 2004
GBO Derived Requirements
Requirement Performance1. Shall cover 8 hrs of Geographic Local Time
over North American segment (allows continuous 12 hr conjunctions with probes)
Covers 10 hrs of Geographic LT with ASIs, 14 hrs with GMAGs incl. Non-Themis Contributions
2. Shall include at least one ASI per MLT hour within this geographic segment
Two ASIs per hour (MLT)
3. Shall include two auroral GMAG per hour (MLT) (high/low lat.) within this segment.
More than two GMAGs per hour (MLT) (New + existing)
4. Timing accuracy of phenomena observed shall be better than 10s absolute
1s ASI exposures. Cadence: 0.5s GMAG, 3 -5s ASI. Accuracy: <50 ms (GPS)
5. ASI sensitivity: Detectable response for aurora shall be < 10kRayleigh
< 1kR (5:1 S/N ratio)
6. Sensitivity of GMAG instrument shall be < 1nT
0.1nT
7. The spatial resolution shall be sufficient to locate the substorm brightening with an accuracy of 100km (dMLT < 1°)
ASI data compressed data (Stream 1) provides 0.5° sampling.
THEMIS/GBO CDR 11 UC Berkeley, June 17, 2004
ASI Requirements
REQUIREMENT SYSTEM DESIGN
GB.ASI-1: FOV. The field of view of the ASI shall be greater than 170°, full angle.
Compliance. Yes
GB.ASI-2: Exposure Time. Shall have an exposure duration that is programmable with a maximum exposure duration of no less than 1 second.
Compliance. Yes
GB.ASI-3: Spectral Response. Within passband of 400 to 700nm, shall provide detectable response when stimulated with a source radiance less than 10kRayleigh, at maximum specified exposure duration.
Compliance. Expect minimum sensitivity < 1kR (5:1 SNR)
GB.ASI-4: Spatial Resolution. Shall provide aurora onset localization with accuracy better than 100km (dMLT< 1°)
Compliance. Raw ASI image will have > 250 pixel resolution per image diameter. Thumbnails will have 0.5° binning.
GB.ASI-5: Viewport. Shall have heated dome viewport Compliance. Yes
GB.ASI-6: Cadence Shall have a programmable repetition interval, minimum interval of no less than 10 seconds
Compliance. Have demonstrated cadence of 5s, and 3s appears to be feasible
THEMIS/GBO CDR 12 UC Berkeley, June 17, 2004
ASI Specifications
Imager:• Field of View: 170º full angle
• Spectral passband: 400 – 700 nm (with IR filter)
• Sensitivity: < 1kR (5:1 S/N)
• Spatial resolution: 290 pixel diameter all-sky-image
• Exposure duration: programmable, 1 sec typical
• Cadence: 5 s demonstrated, 3 s appears feasible
Enclosure:• Operate in external ambient –50º to +40ºC
• Maintain internal temperature at 20º ± 10ºC– Requires about 150 W heating worst case
• Hermetically sealed unit w/ nitrogen purge– Dessicant used for field repair– Hermetically sealed electrical connectors
• Polycarbonate/acrylic dome
• Flexible mounting
THEMIS/GBO CDR 13 UC Berkeley, June 17, 2004
Mag Requirements & Specifications
System Features
GPS Receiver Antenna and Electronics Integrated into one package May be located >30M from host (RS422 signals) NTP compatible (1msec time accuracy)
Flxugate Magnetometer
±72KnT dynamic range @ 0.01nT Resolution (~23 bits) Offset DAC system for 256 possible ranges per axis 2 Vectors per second data rate Low Power < 4W Small Size 22cm x 13cm x 5cm Ruggedized All Weather Sensor Design USB interface for data retrieval and firmware upload
THEMIS/GBO CDR 14 UC Berkeley, June 17, 2004
Implementation Plan
GBO Program Implementation:• Integrate ASI from UCB, GMAG from UCLA with site prep
and deployment provided by U. Calgary• Build, calibrate and qualify first unit within one year after
start of Phase B• Five sites shall be installed two winters before THEMIS
launch• Total GBO installed network shall be 20 sites, installed one
winter before THEMIS launch
THEMIS/GBO CDR 15 UC Berkeley, June 17, 2004
GBO Site Location Deployment
THEMIS/GBO CDR 16 UC Berkeley, June 17, 2004
Observatory Design
Major components:• Science Instruments:
– All Sky Imager (ASI)
– Ground Magnetometer (GMAG)
– GPS
• Observatory Equipment– Communications
– Environment Control
– System Computer
THEMIS/GBO CDR 17 UC Berkeley, June 17, 2004
GBO Components
AC Power
GMAG
Telesat Dish
Iridium
GPS
All Sky Imager
Computer Enclosure
Internet
Variations possible at some sites:
Existing magnetometer
Enclosures not needed
Existing Internet connection
THEMIS/GBO CDR 18 UC Berkeley, June 17, 2004
Complete Installation in Athabasca, Canada
ASI dome
Computer Enclosure
Mag
THEMIS/GBO CDR 19 UC Berkeley, June 17, 2004
All Sky Imager Heritage
• Environmental protection/deployment and automation drawn from AGOs (flawless multi-year operation in Antarctica).
• Prototype camera field tested in Canada
– Demonstrated high cadence, high sensitivity
– Taking 5s images
THEMIS/GBO CDR 20 UC Berkeley, June 17, 2004
• ASI primary image 290 pixel diameter is “binned” to 0.5° resolution (thumbnails)
• Primary science data:
Level 1 (~ 1kbps)(incl GMAG, housekeeping)
• Available via SAT comm, either Telesat (Internet real-time) or Iridium (daily)
• High resolution data:
Level 0 (180 kbps)
• Selective downloads via Satellite Internet
• Periodic collection via disk swapping
ASI Data Products
THEMIS/GBO CDR 21 UC Berkeley, June 17, 2004
Production Enclosure Design
Design: Allison Park Group, Inc.
THEMIS/GBO CDR 22 UC Berkeley, June 17, 2004
Prototype ASI Enclosure
ASI installed in Athabasca
THEMIS/GBO CDR 23 UC Berkeley, June 17, 2004
ASI Enclosure Performance
Dome:• Stayed clear• Some ice buildup on flange
Heating:• Maintain 50° T using about 35W
avg. heat power• Total heating power available is
240W
3/3/2004
THEMIS/GBO CDR 24 UC Berkeley, June 17, 2004
ASI Prototype Findings
What we learned:• 5 second cadence produces a LOT of data• Insulation must be tolerant to sun exposure
– Adopting Foil-face polyethylene air pillow wrap, multi-layer wrap
• Improvement to dome heating is desirable• Sealing improvement needed• Other minor issues:
– Need to reduce length of housing– Improve thermal coupling of thermistor to
mounting bracket– Orient camera such that top of image is
North– Various changes in fasteners / assembly
“dome gunk”
Courtesy M. Greffen
THEMIS/GBO CDR 25 UC Berkeley, June 17, 2004
ASI Sun Shield
Background• ASI must survive, without degradation, non-operating
exposure to daytime sun exposure• CCD is Sony Interline Transfer device ICX249AL
– Features “microlens” on each pixel, an organic material subject to deterioration due to UV exposure
• All Sky Lens uses Peleng Fisheye f/3.5– A/R coating exhibited discoloration after one summer in
Athabasca
Result• Need internal sun shield• Drives housing diameter and heat required
THEMIS/GBO CDR 26 UC Berkeley, June 17, 2004
Sun Shield Design
Retracted Position is the Fail-safe Position
THEMIS/GBO CDR 27 UC Berkeley, June 17, 2004
Sun Shield Prototype
Status:• Just built• Needs adjustment / balancing• Solenoid drive circuit needs test
– Provides low power cont. duty drive
• Needs qualification test
THEMIS/GBO CDR 28 UC Berkeley, June 17, 2004
Ground Site Requirements
REQUIREMENT SYSTEM DESIGN
GB.GS-1: GBO sites shall provide largely unobstructed viewing over 160° hemisphere.
Compliance. Site selection criteria
GB.GS-2: GBO sites shall be reasonably clear of local magnetic interference.
Compliance. Site selection criteria
GB.GS-3: Each GBO site shall provide power, 120 VAC, single phase, 60Hz, at least 10A service
Compliance. Site selection criteria
GB.GS-4: Each GBO site shall have a local custodian available for periodic maintenance and Level 0 data retrieval
Compliance. Site selection criteria
THEMIS/GBO CDR 29 UC Berkeley, June 17, 2004
Observatory Requirements
REQUIREMENT SYSTEM DESIGN
GB.OBS-1: Shall provide unattended operation of instruments, data acquisition and storage for up to 4 months per observation season
Compliance. Will operate for 12 months/yr
GB.OBS-2: Shall provide interface to enable periodic upload of new observation parameters and operating software.
Compliance. Internet connectivity provides secure login and file transfer
GB.OBS-3: Shall provide digital interfaces and digital data storage for the ASI and GMAG.
Compliance. Linux OS supports serial, USB, 10BaseT, etc.
GB.OBS-4: Shall provide a GPS receiver for geographic position calibration and time stamp
Compliance. GPS included in GMAG subsystem, provides better than 50ms accuracy. Synchronous image acquisition.
GB.OBS-5: Shall provide a means for daily uplink of Level 1 (compressed) data, at least 3MB/day
Compliance. Satellite Internet connection has demonstrated 10kbps sustained uplink. Provides > 100MB/day
GB.OBS-6: Observatory shall store high resolution, Level 0 data locally on hard drives, at least 24GB/month
Compliance. USB (or Firewire) drives, 80GB to 120GB, will be periodically swapped by site custodian. Selective transfer of high res. data via Internet is also planned
GB.OBS-7: Observatory shall be compatible with locally provided power
Compliance. 120 VAC, 60Hz, 10A service, backed up by UPS. UPS sized for 1 hour battery operation (excl heaters)
GB.OBS-8: Shall provide controlled power-up and power-down of instruments and system computer automatically
Compliance. System power and shutdown/re-boot sequencing controlled by independent control processor
GB.OBS-9: Operate in external ambient temperatures range from -50° to +40°C
Compliance. Enclosures, insulation, heaters and control designed to keep internal temperatures at 20º ± 10º C
GB.OBS-10: Shall survive transport to site and provide stable mounting at the site
Compliance. Yes
THEMIS/GBO CDR 30 UC Berkeley, June 17, 2004
Prototype OSE Layout
28”
Rack Mount Shipping Case
System Computer
GMAG Interface Electronics
Hot Swap HDD
Space available for modems
UPS
THEMIS/GBO CDR 31 UC Berkeley, June 17, 2004
Prototype OSE Layout (2)
Power Control Unit
CR10X Datalogger
UPS
Camera Power Supply
CR10X Battery
THEMIS/GBO CDR 32 UC Berkeley, June 17, 2004
Power Control Unit (PCU)
Design Approach• Provide temperature environment inside Computer Enclosure and ASI that
enables use of standard commercial hardware for computer, USB hard drives, Telesat/Starband gear, etc.– Maintain internal temperatures at 20º ± 10º C– Implement graceful shutdown in either event of:
– Loss of Power– Loss of Temperature (either too high, or too low)
– In the event of extended power loss, power control must allow for temperature to stabilize prior to re-boot
• Select “Smart” controller (CR10X) vs Thermostat approach– Programmable with remote access via Internet or Iridium– Provides analog I/O, digital I/O for System Computer– Extended temperature range (-55º to +85ºC)
– Always operating and accessible– Low power consumption (battery can operate it for months)– Simple programming and data logging capability
The PCU provides control of both Temperature and Instrument Power
THEMIS/GBO CDR 33 UC Berkeley, June 17, 2004
Heating and Cooling Control
CR10X
Temperature Sensors
ASI CSE Outside
AC Power
Analog I/O
Digital I/OSystem
ComputerSerial I/O
Main ACVLINE
CSE Heater
SSRs
ASI Heater
CSE Cooler
CB1
Power Control Unit
THEMIS/GBO CDR 34 UC Berkeley, June 17, 2004
CSE Heating / Cooling Devices
Small Space Heaters 175W, 120VAC, 2 ea
Solid State Air Conditioner
163W Capacity
120VAC Power
THEMIS/GBO CDR 35 UC Berkeley, June 17, 2004
Instrument Data Flow
System Computer
ASI
GMAG Telesat Modem
Hot Swap Hard
Drive(s)
USB
Serial I/O
10/100 Base T
GPS
Internet
THEMIS/GBO CDR 36 UC Berkeley, June 17, 2004
Remote Intervention
Two Levels:• Typically GBO accessed via Internet
– Hardwired in several locations– Using local LAN connection
– Telesat HSi (Canada) or Starband 480 (Alaska)– Can provide fixed IP address– Tests indicate about 10kbps sustainable uplink rate
• Under duress, Back up communication via Iridium– Reserve for remote locations?– 2400 bps
THEMIS/GBO CDR 37 UC Berkeley, June 17, 2004
Iridium Connection
System Computer
Serial Port Switch Iridium Modem
CR10X
Serial I/O
Supervisor Channel 2
Sup
ervi
s or
Cha
n ne l
1
UCB
THEMIS/GBO CDR 38 UC Berkeley, June 17, 2004
Computer Sys. Enclosure (CSE)
Requirements:• House Observatory Support Electronics in Controlled Environment
– ASI, GMAG, Computer, Communications, Control, etc.
• Maintain internal temperature at 20º ± 10º C
• Operate in external ambient of -50º to +40ºC
• Provide “dust-free” method of cooling when required
• External Cable access via “stuffing tube”
• Provide access door for Hard Drive Hot Swap
• Provide access for maintenance
• Ruggedized and shock protection for transportation
THEMIS/GBO CDR 39 UC Berkeley, June 17, 2004
Enclosure Concept
“Box within a Box”
Internal Rack Mount for
Equipment
(Doubles as Shipping Case)
External Insulated Environmental Enclosure
THEMIS/GBO CDR 40 UC Berkeley, June 17, 2004
Heating/Cooling Needs
Heating Required:• Outside temp: -60º C• Inside temp: +10º
• Heat added: 165 W
Cooling Required:• Outside temp: +50º C• Inside temp: +40º
• Heat to remove: 80 W
Assumptions:
Enclosure dimensions: 34” (h) x 44” (w) x 44” (l)
Thermal resistance (R-value): R-12
Internal power dissipation: 47 W
Prototype GBOAthabasca
THEMIS/GBO CDR 41 UC Berkeley, June 17, 2004
Prototype Findings
Prototype CSE Deployment:• Current design size is larger than necessary.
– Prototype size: 43” (L) x 45” (W) x 38” (H)– Could be smaller for easier transport.– Minimum size: approx. 37” (L) x 40” (W) x 38” (H)
• “Awning” design needs improvement.• Keeping it warm inside has proven to be easy• Keeping it cool inside may be more difficult, but the solid state A/C seems
to work.
Athabasca 4/15/04 courtesy M. Greffen
THEMIS/GBO CDR 42 UC Berkeley, June 17, 2004
Ground Magnetometer
Overview:• Specifications
• Design
• Data Products
• Software
• GBO & E/PO
THEMIS/GBO CDR 43 UC Berkeley, June 17, 2004
Block Diagram
UCLA GBO MAGNETOMETER SYSTEM OVERVIEW
PIC18F452
Micro-Controller
GPS Serial Interface
DB
15FU
SB USB
Interface
USB Interface
DB
9F
PPS Timing Interface
PPS Timing Interface
GPS Heater & Power Interface
GPS Heater & Power Interface
TCXOTCXO
XC2S50
FPGA
FPGA FLASH
FPGA FLASH
Power Regulation
+/-15V +5V
Power Regulation
+/-15V +5V
DIN
-5F
Axis 1Axis 1
Axis 2Axis 2
Axis 3Axis 3
DB
25F
DriveDrive
Sensor Heater
Sensor Heater
THEMIS/GBO CDR 44 UC Berkeley, June 17, 2004
Mechanical and Thermal
GMAG PCB & Chassis
THEMIS/GBO CDR 45 UC Berkeley, June 17, 2004
Mechanical and Thermal
Ground Magnetometer Fluxgate Sensor
THEMIS/GBO CDR 46 UC Berkeley, June 17, 2004
Mechanical and Thermal
Ground Magnetometer Fluxgate Sensor Components
THEMIS/GBO CDR 47 UC Berkeley, June 17, 2004
Mechanical and Thermal
Installed Fluxgate Sensor at Athabasca
THEMIS/GBO Mission CDR 48 UCB, Jun. 17, 2004
GBO Data Flow
THEMIS/GBO Mission CDR 49 UCB, Jun. 17, 2004
Data Flow & Monitoring
Collaborator tasks:1) UCalgary physically installs and maintains the Canadian GBO's
2) UCB physically installs and maintains the Alaskan GBO's
3) UCalgary collects all GBO data (UCB ASI, UCLA GMAG, H&S) and GBO team (UCLA, UCB, UA) picks up data from UCalgary.
4) UAlberta recovers CGSM and NRCAN GMAG data. UCB picks up data from UAlberta.
5) UCalgary will have a notification system in place that will react to all high level GBO H&S issues. UCB acts in backup capacity for this role.
6) UCalgary maintains the physical status and responds to H&S of the Canadian GBO's
7) UCB maintains the physical status and responds to H&S of of the Alaskan GBO's
8) UCLA monitors the data quality of the GMAG data and directs UCalgary to make any configuration or calibration changes. Changes are discussed and approved by GBO team.
9) UCalgary monitors the quality of the Canadian ASI data. UCalgary will make changes to instrument configuration/calibration after consulting with the GBO team (if the action is not already specified in the ops doc).
10) UCB monitors the quality of the Alaskan ASI data and directs UCalgary to make changes to instrument configuration/calibration.
11) UCLA will recover the E/PO data. UCB picks up data from UCLA.
12) UCLA will validate data and respond to any H&S issues.
THEMIS/GBO Mission CDR 50 UCB, Jun. 17, 2004
Approach to System I&T
Lab testing where necessary and possible• For instance, testing of temperature limits on cameras
• Cold limit testing on commercial components
Get in the field early and often• Establish network of GBOs well before satellites launched
• Prototype to be deployed winter ’03-’04– ASI deployed with OSE in Calgary late Feb.– CSE deployed in Athabasca mid-Apr– GMAG (E/PO type) deployed in Athabasca mid-Apr
Original Deployment Schedule• 5 Units to be deployed by winter ’04-05
• Additional 15 Units deployed by winter ’05-06
THEMIS/GBO Mission CDR 51 UCB, Jun. 17, 2004
Observatory I&T Flow
ASI Sensor Fab / Integration
(UCB)
Subsystem Acceptance Test
(incl performance verification)
GMAG / GPS Fab / Integration
(UCLA)
Subsystem Acceptance Test
(incl performance verification)
OSE Fab / Integration
(UCB)
Subsystem Acceptance Test
(incl performance verification)
Subsystem Inspection
Subsystem Inspection
Subsystem Inspection
System Integration
Functional Test
Burn - In
Shipment to Site
On-Site Functional Test and Verification
Remote Comms Verification
Physical Installation
Custodian Orientation
Remote Data Acquisition &
Control Verification
Installation Team departs site only after Operation is confirmed
Unattended Operation
THEMIS/GBO CDR 52 UC Berkeley, June 17, 2004
ASI Unit Test Summary
Acceptance Tests:• FOV (>170°)• Exposure Time (duration at least 1 sec)• Spectral Response
– Produce detectable response to source radiance < 10kR– Goal < 1kR– Passband 400 – 700nm– 1 sec exposure duration
• Spatial Resolution (>250 pixel image diameter)– Verify point source response
• Cadence (better than 10s)– Goal < 5s
• Record dark and bias images (room temperature)• Record response to standard source
Pre-Shipment:• Focus adjustment and verification• Alignment verification (top of image relative to alignment datum)• Heater control functional test (incl thermistor time response)• Solenoid functional test (#iterations TBD)• Internal mechanical inspection checklist• Final Assembly / purge and backfill• Final functional test and Imager Burn-in (duration TBD)
THEMIS/GBO CDR 53 UC Berkeley, June 17, 2004
Instrument Integration and Test
Verification Tests Performed by UCLA
2.6.1 GMAG Sensitivity (UCLA CF)
2.6.2 GMAG 3-axis Sensing (SGDSD)
2.6.3 GMAG Dynamic Range (UCLA CF)
2.6.4 GMAG Time Resolution (UCLA CF)
2.7.4 GPS Time Base (UCLA CF)
2.7.9 Operating Temperature (UCLA CF)
CF - Calibration Facility
SGDSD - San Gabriel Dam Site Deployment
THEMIS/GBO Mission CDR 54 UCB, Jun. 17, 2004
Current Deployment Schedule
Deployments scheduled between May and Oct in ’04, ’05, ‘06
By Winter ’04-’05: 6 GBOs done• Summer ’04: deploy 4 in
Canada, 2 in Alaska
By Winter ’05-’06: 14 GBOs done• Summer ’05: deploy 6 in
Canada, 2 in Alaska• Demonstrate operational
breadth of network
By Time of Themis Launch (Oct. ’06): 20 GBOs completed• Summer ’06: deploy final 6 in
Canada• Complete the network, have all
operating
THEMIS/GBO Mission CDR 55 UCB, Jun. 17, 2004
Deploy Schedule Summary
No. Site Abbrev. Location Latitude Longitude GMAG type Deploy12 Athabasca ATHA Canada 54.7 246.7 NRCan & GPS-2 Apr-049 Prince George PGEO Canada 53.9 237.4 GMAG-Proto Jun-043 Mcgrath MCGR USA 63 204.4 GMAG-1 (6/18/04) Jul-047 Lac de Gras LGRA Canada 64.6 250 GMAG-2 (6/21/04) Jul-04
14 The Pas TPAS Canada ? ? GMAG-3 (6/28/04) Sep-042 Fort Yukon FYU USA 67 199.6 GI & GPS-1 Oct-04
8 Fort Simpson FSIM Canada 61.8 238.8 CGSM & GPS-3 May-054 Kiana KIA USA 66.6 214.7 GMAG-4 (9/24/04) Jun-055 Inuvik INUV Canada 68.3 226.7 CGSM ('06) & GPS-4 Jun-051 Gakona GAK USA 62.4 214.8 GI & GPS-5 Jul-05
10 Rankin Inlet RANK Canada 62.8 267.9 CGSM & GPS-6 Jul-0518 Nain NAIN Canada 56.5 298.3 GMAG-5 (9/27/04) Aug-0519 Gangon GANG Canada 51.9 291.8 GMAG-6 (3/14/05) Sep-0515 Pinawa PINA Canada 50.3 264 CGSM & GPS-7 Oct-05
11 Fort Smith FSMI Canada 60 248.1 CGSM & GPS-8 May-0613 Gillam GILL Canada 56.4 265.4 CGSM & GPS-9 May-0616 PBQ PBQ Canada 55.3 292.3 NRCan & GPS-10 Jun-066 White Horse WHOR Canada 60.7 224.9 GMAG-7 (5/2/05) Jul-06
20 Goose Bay GBAY Canada 53.3 299.6 GMAG-8 (5/9/05) Aug-0617 Kapuskasing KAPU Canada 49.4 277.6 GMAG-9 (5/16/05) Sep-06
Notes:
“GMAG-n” is a full UCLA-built system with GMAG sensor, expected delivery in parentheses
“GPS-n” is a UCLA-built system with GPS-only
THEMIS/GBO Mission CDR 56 UCB, Jun. 17, 2004
Status/Issues
GBO Production Procurement Status/Issues• ASI and OSE procurement is already in progress
– Cameras, Lenses, Power components already in house– ASI Enclosure production is in procurement
• Need to identify sites that require a Computer Enclosure– Ideally we purchase what we need in one order– Changes to design will likely cause some delay in fabrication
Open Issues• Sun shield design validation• Integration of Iridium is lagging
THEMIS/GBO Mission CDR 57 UCB, Jun. 17, 2004
CDR Peer Review Results
RFA # Status Title Action SummaryGBO-1 Closed Create test and verification
planA T/V Plan document is forthcoming. Test matrix and test flow are completed.
GBO-2 Closed Create configuration control plan
Each site will have hardware configuration list that is unique. Software configuration for each site will be identical, based on reference system developed and maintained at UCB. This will be covered in CC Plan.
GBO-3 Closed Provide go/no-go criteria on GBO operational components
The GBO Operations Handbook will cover this.
GBO-4 Closed Specify mission criticality of E/PO elements
E/PO sites have never been considered as mission critical elements. They are educational opportunities.
GBO-5 Closed Responsibilities for Critical Monitoring
GBO Operations Handbook will cover this.
GBO-6 Closed Establish network security plan GBO network security plan is in process. Will cover details of filtering network I/O, and configuration of network data servers.
GBO CDR Peer Review on 26-27 April, 2004 resulted in 6 RFAs. All have been closed by the review board.
THEMIS/GBO Mission CDR 58 UCB, Jun. 17, 2004
CDR Peer Review Results
Suggestion # Title Discussion StatusGBO-S1 Humidity Control Implement humidity sensors, include in housekeeping will comply
GBO-S2 Active Thermal Control
Implement additional thermal protection will comply
GBO-S3 Lightning Implement lightning arresters - GPS includes this. Other external components under review.
under review
GBO-S4 Cemented Lenses Follow manufacturer's environmental (temperature, humidity) recommendations for cemented optics.
under review
GBO-S5 Exterior Field Hardware label
Include contact information on enclosure will comply
GBO-S6 GBO OSE and ASI enclosure materials
Review material compatibility for sun exposure will comply
GBO-S7 Setting up the ASI Provide set up fixture for levelling and orientation. will comply
GBO-S8 Satellite Photos of Cloud cover
Archive satellite imagery of cloud cover, for future data analysis.
will comply
GBO-S9 Data comms open year round
Maintain year-round communications to monitor station status. Note: GMAG to be operated continuously
will comply
GBO-S10 Observatory enclosure sizes
Review tranportability of enclosures, relative to maximum size constraints.
will comply
GBO-S11 Recognize Canadian participation
E/PO group reference Canandian participation will comply
GBO-S12 Iridium satcomm Review power requirements and reliability available. will comply
GBO CDR Peer Review on 26-27 April, 2004 resulted in several recommendations, summarized below...