USArray Data and Network Operations:
Array Network Facility
Overall Operations:
Frank L. Vernon
Luciana Astiz
Metadata:
Jennifer A. Eakins
Systems:
Brian Battistuz
Davis, Geoff
Foley, Steve
Analists:
rt: Martinov, Vladik & Karasu, Gulsum
rev: Jon Tytell & Trilby Cox
Web interface:
Rob L. Newman & Juan Reyes
August 25-29, 2010
NW University
1
Outline
 Overview of ANF operations
& some fun tools with TA data
Quick ANF website tour
•Station information : web & reports
• SoH Monitoring tools (dlmon & history)
• Special Events
• Event picks
Examples of other Big Data Sets
•1995: the IRIS 10th Anniversary Poster
• 2002-2008: Baja data set - “a mi manera”
Transportable Array Concept
 400 broadband seismic stations
• ~70 km spacing between stations
• ~1500 x 800 km “footprint”
• ~2 year deployments at each site,
1623 sites
2004
ANF
• Operational Goals
• High-quality broadband data
• On par with permanent network
stations
• Maximize data return (>85%)
• Data to the scientific and regional
network community in near real time
• 40 and 1 sps continuous
• Equipment redeployed five times
• “Adoptable” stations
2013
ANF Operations
Operations at the Array Network Facility
• Collection of TA station data & transfer to DMC
• Provide station metadata to DMC (Dataless)
• Monitor SoH channels & provide views to field engineers
• Remote command & control of station equipment
• Event location & association as data quality review
• Instrumental Calibration
• Recover & submit data gaps from station balers to DMC
• Resubmit final station data upon removal to DMC
TA Station Lifetime
• Reconnaissance
1- 10 days
• Permitting
1 - 500 days
• Construction
0.2 - 2 day
• Installation
0.2 - 1 day
• Operation
data transmission to ANF/DMC ~ 2 years but more for
EARN stations
monitoring of SoH by ANF
servicing by field crews
• Release
removal of the station
1- 3 days
or transfer of the station to a new operator
Stations in the Field so far
• On Schedule
• 1030 commissioned Stations
• 470 operating Stations
• 525 removed Stations
• Rolling eastward at a rate of
about 400 km / year, 18 sta/mo
• North-south deployment strategy
permits year-round operations
•Very Low power to avoid cultural noise
sources and to maximize sitting
opportunities. 3-5W solar powered.
•Fast construction, material adapts to
conditions, from ready sources.
•high quality LP data requires thermal
isolation.
•High power communications separated
from station power.
Stations going in . . .
•Local recording, minimum complexity
in uplink
. . . and coming out
TA stations rolling East
TA stations … Aug 2010
Decomissioned &
Adopted Stations ‘
Status: RT Performance
TA performance 2005 01 – 2010 07
ANF System Upgrades
2005
- Sun V240
2007
- Sun Cluster attempt (on 3 servers & Raid) -----did not work
- Sun T2000 at SDSCC as backup (zfs)
- Sun T2000 at DMC as 2nd backup (zfs)
2008
- Zones & zfs on 5 servers (Sun V240’s & T2000’s)
- ANFwiki for internal documentation
- backup acquisition system in SCC@ucsd
2009
- Added storage and 2- T5200 for processing & develop.
- cvs for common software, mostly to Antelope-contrib
- adding backup acquisition system at DMC
2010 - changed ANF internal documentation to Jira
- Moving operational hardware to the SCC @UCSD
- Backup systems: DMC and IGPP
Data Flow at ANF
Station Improvements
Equipment Refinements for ++ data availability
• Vault interface Enclosure
• Protect equipment from humidity, increase reliability of
comms equipment
• Standardize connections
• Cell modem replacements as networks upgrade
• Baler44 (IP) phased into stations to replace Baler14 (Serial)
• Add meteorlogical measurements
ANF Operations
Operations at the Array Network Facility
• Collection of TA station data & transfer to DMC
• Provide station metadata to DMC (Dataless)
• Monitor SoH channels & provide views to field engineers
• Remote command & control of station equipment
• Event location & association as data quality review
• Instrumental Calibration
• Recover & submit data gaps from station balers to DMC
• Resubmit final station data upon removal to DMC
Data Return - TA
95%...!!!!
85%
TA Gaps
• Examined data gaps as a function of time
• Examined cumulative gap statistics
Status: RT Latency
Data: Seismic, SoH, Logs
•Real-time monitoring of SoH
•Detect problems
•Initiate corrective actions
•Station QC & SoH on the web
•SoH channel displays for near-real-time and summary
•Metrics for arbitrary time intervals
SoH for H09A
Clock Quality
• Examination of clock quality channels for test interval (2007) indicates
clock quality is excellent
Mass Position
Sensor Mass Recenter operation affects data quality and broadly
indicates the long-period quality of site. Most stations have 10 or
fewer mass re-centers over a one year period
Diagnostic View: Discovery!
Guralp Vertical:
mass position vs noise
Power Density Functions
• Noise PDF
TA Vertical
TA Horizontal
GSN Vertical
GSN Horizontal
Sensors
• Summary noise results
aggregated by sensor type
• Negligible differences
between sensor types
Data Flow at ANF
Backups
Backups
Preferred Origin @ ANF
ANF Bulletin
Events @ H09A
Events @ H17A
Additional Assessments
Calibration
STS-2
CMG-3T
Procedures: Calibration
• Automated process
for command,
capture, and
analysis of cal
signals
• Analysis of
calibration signals
to verify amplitude
and phase
response
• Will apply to all TA
stations at
beginning and end
of deployment
• Network-wide
calibration for
sensor statistics
Results from BRTT
Antelope software
Net Calibration Results
Procedures: Orientation
• Direct measurement of
orientation of all stations
• Using fiber-optic gyroscope
IXSEA Octans IV,
Nonmagnetic orientation
accurate to < 0.2 degrees
• Used at all new station
installations
• Used when existing TA
stations are removed
• Validation of empirical
orientation determinations
• Empirical estimates from
surface and mantle wave
polarization techniques
TA station orientation, relative to north, from
empirical analysis
Results from Ekström and Busby, SRL, 2008
Orientations with P-waves
Azimuthal Profiles
Outline
 Overview of ANF operations
& some fun tools with TA data
Examples of other Big Data Sets
•1995: the IRIS 10th Anniversary Poster
Quick ANF website tour
•Station information : web & reports
• SoH Monitoring tools (dlmon & history)
• Special Events
• Event picks
IRIS Poster-1995
100,000 1-hr long BH
seismograms
3-compnent (Z, T, R)
~20 Gb ?
Outline
 Overview of ANF operations
& some fun tools with TA data
Examples of other Big Data Sets
•1995: the IRIS 10th Anniversary Poster
• 2002-2008: Baja data set - “a mi manera”
Quick ANF website tour
•Station information : web & reports
• SoH Monitoring tools (dlmon & history)
• Special Events
• Event picks
ANF-homepage
Station pages
Baja datset:2002-2008
~ 50 stations/year from 8 networks
~ 550 Gb of continous data