Real Time Data From the Plate Boundary Observatory Continuous GPS Network Mike JacksonUNAVCO PBO Directorand the PBO Staff AGU Joint Assembly May 26, 2009

PBO GPS Network

GPS Station Layout MET Station

Cascadia Real Time Why are real-time geodetic data products important? Why are real-time geodetic data products important? For science-based hazard monitoring, real-time geodetic data are critical for determining static and dynamic displacements, slow slip and early post-seismic transients, and critical measurements between the seismic frequency band and static displacements. For science-based hazard monitoring, real-time geodetic data are critical for determining static and dynamic displacements, slow slip and early post-seismic transients, and critical measurements between the seismic frequency band and static displacements. Decisions and response can only be made as fast as the data are provide. Decisions and response can only be made as fast as the data are provide. UNAVCO will provide realtime data delivery UNAVCO will provide realtime data delivery Essential data products such as position estimates, tropospheric water content, ionospheric electron column density are not included in this proposal. Essential data products such as position estimates, tropospheric water content, ionospheric electron column density are not included in this proposal.

UNAVCO Real-time Geodetic data What real-time GPS data are available from PBO?What real-time GPS data are available from PBO? What are the critical constraints on delivering real- time GPS data?What are the critical constraints on delivering real- time GPS data? Who are the primary customers of these data sets?Who are the primary customers of these data sets? What are the future plans with respect to real-time data for the PBO?What are the future plans with respect to real-time data for the PBO?

UNAVCO PBO RT Data What are the availability of real-time geodetic products?What are the availability of real-time geodetic products? Currently UNAVCO in a beta-test phase streaming GPS data from ~84 PBO stations with an average receiver to PBO server latency of 1.11 s and an average of 93.2% data completeness. Data completeness is low because we are testing the “good, the bad, and the ugly” data communications scenarios.Currently UNAVCO in a beta-test phase streaming GPS data from ~84 PBO stations with an average receiver to PBO server latency of 1.11 s and an average of 93.2% data completeness. Data completeness is low because we are testing the “good, the bad, and the ugly” data communications scenarios. For UNAVCO RT beta-test we are using a broad range data communications types including direct internet, VSAT, CDMA modem, and IP radio.For UNAVCO RT beta-test we are using a broad range data communications types including direct internet, VSAT, CDMA modem, and IP radio. Note these are raw data only. Providing epoch-epoch solutions is a critical component of a science and hazards system.Note these are raw data only. Providing epoch-epoch solutions is a critical component of a science and hazards system.

What are real-time geodetic data and how do you assess the quality?What are real-time geodetic data and how do you assess the quality? The definition of real-time data depends on the on the science target, sampling, rate, and latency of data from instrument to user.The definition of real-time data depends on the on the science target, sampling, rate, and latency of data from instrument to user. For earthquake and volcano science and hazards applications we use a a 1 Hz sampling interval and latency requirement of < 5 seconds for data between station to processing center.For earthquake and volcano science and hazards applications we use a a 1 Hz sampling interval and latency requirement of < 5 seconds for data between station to processing center. Also need to define a “completeness” metric. For earthquake and volcano hazards applications we use a 95% data completeness requirement.Also need to define a “completeness” metric. For earthquake and volcano hazards applications we use a 95% data completeness requirement. Other considerations include station up-time and the ability to respond to maintenance issues.Other considerations include station up-time and the ability to respond to maintenance issues. Real-time Geodetic Data Definitions

Latency and Completeness Average latency 1.11 s Average completeness 93.2%

Cascadia Real-time NSF proposed real-time upgrade of 232 stations in Cascadia.NSF proposed real-time upgrade of 232 stations in Cascadia. Funded as part of the American Recovery and Reinvestment Act (ARRA)Funded as part of the American Recovery and Reinvestment Act (ARRA) Three year implementation planThree year implementation plan Initial upgrades focused on ETS critical stationsInitial upgrades focused on ETS critical stations Priority based on science target, time line, location of personnelPriority based on science target, time line, location of personnel Before

Cascadia Real-time Station upgrades include power augmentation and upgraded data communicationsStation upgrades include power augmentation and upgraded data communications 3-G CDMA modems3-G CDMA modems removing VSATSremoving VSATS high speed radio networkshigh speed radio networks Purchase data distribution and QC software including latency, completeness, position estimationPurchase data distribution and QC software including latency, completeness, position estimation After

Year 1 Start work Fall 2009Start work Fall 2009 Upgrade Mount St. Helens stationsUpgrade Mount St. Helens stations Upgrade 86 stations in fore- arcUpgrade 86 stations in fore- arc Work driven by science targets and location of personnelWork driven by science targets and location of personnel Year 1

Year 2 Year 1 Upgrade 37 fore- arc stations in OregonUpgrade 37 fore- arc stations in Oregon Upgrade high altitude sites including Mt. Shasta/LassenUpgrade high altitude sites including Mt. Shasta/Lassen

Year 3 Year 2 Year 1 Upgrade remainder of back-arc stationsUpgrade remainder of back-arc stations

Project Milestones

Budget

Personnel PersonnelFTE Time (yrs.) Field Tech Field Engineer I 23 RT Network Admin 0.55 Database0.255 Archive0.255 Education and Outreach 0.55

Data Distribution