THEMIS/GBO Engineering Peer Review CTR - 1 UCB, Oct 17, 2003

GBO/EPO Magnetometers: OverviewC. T. Russell

THEMIS/GBO Engineering Peer Review CTR - 2 UCB, Oct 17, 2003

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

Instrument Organization & Management

THEMIS/GBO Engineering Peer Review CTR - 3 UCB, Oct 17, 2003

* Ground based magnetometers

*

UCLA Magnetometer Experience

*

*

*

THEMIS/GBO Engineering Peer Review CTR - 4 UCB, Oct 17, 2003

Auroral Zone Magnetic Phenomena

THEMIS/GBO Engineering Peer Review CTR - 5 UCB, Oct 17, 2003

Auroral Zone Magnetic Phenomena

THEMIS/GBO Engineering Peer Review CTR - 6 UCB, Oct 17, 2003

Magnetometer Driving Requirements

Level Requirement Capability Comply? L1 Onset times to <10s Sample rate 2 Hz Yes L1 Determine onset locations Over 30 MAG sites Yes L2 Current disruption latitudes Churchill chain ~1 o spacing Yes L2 Identity PiB occurrences Sample rate 2 Hz Yes L3 Measure full range of field variation Range ± 72,000 nT Yes L3 Resolve PiB waveforms across array Resolution 0.03 nT (22 bits) Yes L3 Survive arctic winter conditions Sensors operate at -170 o C Yes L3 Maintain orientation <5 o Seasonal tilting <5 o Yes

THEMIS/GBO Engineering Peer Review CTR - 7 UCB, Oct 17, 2003

Magnetometer Deployment

UCLA is providing 20 magnetometers: 10 EPO, 8 GBO, 2 spares

Delivery datesEPO : 5 in summer ’04

5 in summer ’05

GBO: Prototype in fall ‘035 in fall ’045 in fall ’05

Selection of EPO magnetometer sitesCompetition with infrastructure (power, communication) and

location (quiet, uniform distribution of sites) used as factors in selection

Other deliverablesMagnetometer user manualsWeb pages including data serversCalibration dataAdvice on appropriate teacher lesson plans

THEMIS/GBO Engineering Peer Review CTR - 8 UCB, Oct 17, 2003

UCLA ground-based magnetometer is ideally suited to supplying the measurements needed by the THEMIS project

The magnetometer design and the team is at a high level of readiness to support the THEMIS project

The magnetometer team is excited by the opportunity to involve students in the scientific discoveries of THEMIS through the acquisition of magnetic records

Conclusions