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Ground Magnetometer

Ground Magnetometer. David Pierce UCLA. CDR Topic Overview. GMAG Subsystem Requirements & Specifications Block Diagram Electrical Diagram / Layout Mechanical / Mass / Power GPS Timing Software Instrument Integration and Test Schedule Issues. Requirements & Specifications.

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Ground Magnetometer

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  1. Ground Magnetometer David Pierce UCLA

  2. CDR Topic Overview • GMAG Subsystem • Requirements & Specifications • Block Diagram • Electrical Diagram / Layout • Mechanical / Mass / Power • GPS Timing • Software • Instrument Integration and Test • Schedule • Issues

  3. Requirements & Specifications

  4. 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

  5. XC2S50 FPGA PIC18F452 Micro-Controller GPS Serial Interface Block Diagram • UCLA GBO MAGNETOMETER SYSTEM OVERVIEW TCXO Sensor Heater USB USB Interface FPGA FLASH DB9F Drive PPS Timing Interface Axis 1 DB25F Axis 2 DB15F Axis 3 GPS Heater & Power Interface DIN-5F Power Regulation +/-15V +5V

  6. Electrical Interfaces • GMAG Interfaces • GPS ACUTIME2000 Antenna DB-15F • GPS Serial NTP Interface DB-9F • USB Data Interface USB-B • Sensor Fluxgate Magnetometer DB-25F • Power DC Voltage Input DIN-5F

  7. Electrical Interfaces GPS ACUTIME 2000 / NTP Interface Detail USB (Type B) Data & Time Packets Micro Controller Precise Time Sync COM2 (DB-9F) RXD RS-232 / TTL Interface GPS Configuration RTS GPS Time & Status GPS Connector (DB-15F) Event RS-422 / TTL Interface PORTA FPGA PPS PORTB PORTB

  8. Mechanical and Thermal • UCLA GBO Magnetometer Chassis 21.6cm USB Type B – GBO Data System DB9F – GBO Data System All components rated to operate at -40C - +85C DB15F – GPS Receiver DIN 5F – +12V Power Input 13.4cm DB25F – Fluxgate Sensor 5.1cm

  9. Mechanical and Thermal • GMAG PCB & Chassis

  10. Mechanical and Thermal • UCLA GBO Magnetometer Sensor DB25M 50Meters (Max) ~100cm 12.7cm

  11. Mechanical and Thermal • Ground Magnetometer Fluxgate Sensor

  12. Mechanical and Thermal • Ground Magnetometer Fluxgate Sensor Components

  13. Mechanical and Thermal • Installed Fluxgate Sensor at LANL

  14. 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)

  15. Parts • All parts are industrial grade or better • All parts rated to operate at -40C - +85C

  16. 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

  17. 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

  18. GMAG Software

  19. GMAG Software

  20. GMAG Software

  21. 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)

  22. 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

  23. 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

  24. 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

  25. Issues • GPS Operation at extreme low temperatures • LINUX application software in development

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