themis/gbo cdr peer review 1 univ. of calgary, apr. 26-27, 2004 ground magnetometer david pierce...
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THEMIS/GBO CDR Peer Review 1 Univ. of Calgary, Apr. 26-27, 2004
Ground Magnetometer
David Pierce
UCLA
THEMIS/GBO CDR Peer Review 2 Univ. of Calgary, Apr. 26-27, 2004
CDR Topic Overview
GMAG Subsystem
• Requirements & Specifications• Block Diagram• Electrical Diagram / Layout • Mechanical / Mass / Power• GPS Timing• Software • Instrument Integration and Test• Schedule• Issues
THEMIS/GBO CDR Peer Review 3 Univ. of Calgary, Apr. 26-27, 2004
Requirements & Specifications
Level Requirement Capability Comply? L1 Onset times to <30s 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; Res. 0.03 nT Yes L4 Measure ± 2000 nT Range ± 72,000 nT Yes L4 Resolve ±1 nT Resolution 0.03 nT (22 bits) Yes L4 Provide 1s time resolution Sample rate 2 Hz Yes L5 Survive arctic winter conditions Sensors operate at -170 o C Yes L5 Maintain orientation <5 o Seasonal tilting <5 o Yes
THEMIS/GBO CDR Peer Review 4 Univ. of Calgary, Apr. 26-27, 2004
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 Peer Review 5 Univ. of Calgary, Apr. 26-27, 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 Peer Review 6 Univ. of Calgary, Apr. 26-27, 2004
Electrical Interfaces
GMAG Interfaces
GPS ACUTIME2000 Antenna DB-15F
GPS Serial NTP Interface DB-9F
USB Data Interface USB-B
Sensor Fluxgate MagnetometerDB-25F
Power DC Voltage Input DIN-5F
THEMIS/GBO CDR Peer Review 7 Univ. of Calgary, Apr. 26-27, 2004
Electrical Interfaces
Micro ControllerMicro Controller
FPGA FPGA
RS-422 / TTLInterface
RS-422 / TTLInterface
GPS Connector
(DB-15F)
GPS Connector
(DB-15F)
Event
PORTA
PORTB
PORTB
PPS
COM2(DB-9F)
COM2(DB-9F)
RS-232 / TTLInterface
RS-232 / TTLInterface
RXD
RTS
USB(Type B)
USB(Type B)
Data & Time Packets
GPS ACUTIME 2000 / NTP Interface Detail
GPS Time & Status
Precise Time Sync
GPS Configuration
THEMIS/GBO CDR Peer Review 8 Univ. of Calgary, Apr. 26-27, 2004
Mechanical and Thermal
UCLA GBO Magnetometer Chassis
DB15F – GPS Receiver
DB9F – GBO Data System
USB Type B – GBO Data System
21.6cm
DB25F – Fluxgate Sensor
DIN 5F – +12V Power Input
5.1cm
13.4cm
All components rated to
operate at -40C - +85C
THEMIS/GBO CDR Peer Review 9 Univ. of Calgary, Apr. 26-27, 2004
Mechanical and Thermal
GMAG PCB & Chassis
THEMIS/GBO CDR Peer Review 10 Univ. of Calgary, Apr. 26-27, 2004
Mechanical and Thermal
UCLA GBO Magnetometer Sensor
DB25M
~100cm
12.7cm
50Meters (Max)
THEMIS/GBO CDR Peer Review 11 Univ. of Calgary, Apr. 26-27, 2004
Mechanical and Thermal
Ground Magnetometer Fluxgate Sensor
THEMIS/GBO CDR Peer Review 12 Univ. of Calgary, Apr. 26-27, 2004
Mechanical and Thermal
Ground Magnetometer Fluxgate Sensor Components
THEMIS/GBO CDR Peer Review 13 Univ. of Calgary, Apr. 26-27, 2004
Mechanical and Thermal
Installed Fluxgate Sensor at LANL
THEMIS/GBO CDR Peer Review 14 Univ. of Calgary, Apr. 26-27, 2004
Mass & Power
Sensor Mass: 15 Kg
Chassis Mass: 1.2 Kg
Input Voltage: (9 – 18)VDC
Input Current: GPS system 100ma.Magnetometer 250ma.Sensor Heater 600ma.
(max)Electronics Heater 200ma.
(max)
THEMIS/GBO CDR Peer Review 15 Univ. of Calgary, Apr. 26-27, 2004
Parts
All parts are industrial grade or better
All parts rated to operate at -40C - +85C
THEMIS/GBO CDR Peer Review 16 Univ. of Calgary, Apr. 26-27, 2004
GPS Timing
GMAG Data Timing
Sampling determined by TCXO (<10ppm aging)
Time Tagging determined by GPS (5msec)
GPS Time Quality Factor Logged
Time Recalculated Periodically Typ. Hourly
Re-Synchronization at Programmable Rate Optional
THEMIS/GBO CDR Peer Review 17 Univ. of Calgary, Apr. 26-27, 2004
GMAG Software
Program Components
GBO Site Installation Software Linux LabView 7.0
Delivery 5/24/2004
GBO Autonomous Software GNU C (POSIX)
Delivery 5/31/2004
EPO Software Windows LabView 7.0
THEMIS/GBO CDR Peer Review 18 Univ. of Calgary, Apr. 26-27, 2004
GMAG Software
THEMIS/GBO CDR Peer Review 19 Univ. of Calgary, Apr. 26-27, 2004
GMAG Software
THEMIS/GBO CDR Peer Review 20 Univ. of Calgary, Apr. 26-27, 2004
GMAG Software
THEMIS/GBO CDR Peer Review 21 Univ. of Calgary, Apr. 26-27, 2004
GMAG Software
GMAG Data Products
Data Inputs Include:
Configuration File (UCLA_GBO_SSSS_Vxx_xx.INI) uP Firmware File (UCLA_GBO_SSSS_Vxx_xx.UPF) FPGA Firmware File (UCLA_GBO_SSSS_Vxx_xx.GAF)
Data Outputs Include:
Mag Vector Data (SSSSdddddd_MAG_hh_cc.RMD) Mag Housekeeping Data (SSSSdddddd_MAG_hh_cc.HKD) Magnetometer Log Data (SSSSdddddd_MAG_hh_cc.LOD) Mag Calibration Data (UCLA_GBO_SSSS_Vxx_xx.CAL)
THEMIS/GBO CDR Peer Review 22 Univ. of Calgary, Apr. 26-27, 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 CDR Peer Review 23 Univ. of Calgary, Apr. 26-27, 2004
GMAG Delivery Schedule
GBO GMAG Deliveries
GMAG #1 6/18/2004
GMAG #2 6/21/2004
GMAG #3 6/28/2004
GMAG #4 9/24/2004
GMAG #5 10/07/2004
GMAG #6 3/14/2005
GMAG #7 5/02/2005
GMAG #8 5/09/2005
GMAG #9 5/16/2005
GMAG #10 5/23/2005
GBO GPS Only Deliveries
GPS #1 7/02/2004
GPS #2 12/06/2004
GPS #3 1/25/2005
GPS #4 3/16/2005
GPS #5 5/16/2005
GPS #6 6/09/2005
GPS #7 11/01/2005
GPS #8 11/15/2005
GPS #9 12/01/2005
GPS #10 TBD
THEMIS/GBO CDR Peer Review 24 Univ. of Calgary, Apr. 26-27, 2004
GMAG Delivery Schedule
EPO GMAG Deliveries
EPOMAG #1 7/12/2004
EPOMAG #2 8/12/2004
EPOMAG #3 8/28/2004
EPOMAG #4 9/12/2004
EPOMAG #5 10/14/2004
EPOMAG #6 6/15/2005
EPOMAG #7 6/30/2005
EPOMAG #8 7/15/2005
EPOMAG #9 8/01/2005
EPOMAG #10 8/15/2005
THEMIS/GBO CDR Peer Review 25 Univ. of Calgary, Apr. 26-27, 2004
Issues
GPS Operation at extreme low temperatures
LINUX application software in development