PBO GPS NetworkPBO GPS Network

PBO GPS NetworkPBO GPS Network

GPS Station LayoutGPS Station Layout

MET Station

Cascadia Real TimeCascadia 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 For science-based hazard monitoring, real-time

geodetic data are critical for determining static and geodetic data are critical for determining static and dynamic displacements, slow slip and early post-dynamic displacements, slow slip and early post-seismic transients, and critical measurements seismic transients, and critical measurements between the seismic frequency band and static between the seismic frequency band and static displacements. displacements.

• Decisions and response can only be made as fast Decisions and response can only be made as fast as the data are provide. as the data are provide.

• UNAVCO will provide realtime data delivery UNAVCO will provide realtime data delivery • Essential data products such as position estimates, Essential data products such as position estimates,

tropospheric water content, ionospheric electron tropospheric water content, ionospheric electron column density are not included in this proposal.column density are not included in this proposal.

UNAVCO Real-time Geodetic UNAVCO Real-time Geodetic datadata

• What real-time GPS data What real-time GPS data are available from PBO?are available from PBO?

• What are the critical What are the critical constraints on delivering constraints on delivering real-time GPS data?real-time GPS data?

• Who are the primary Who are the primary customers of these data customers of these data sets?sets?

• What are the future plans What are the future plans with respect to real-time with respect to real-time data for the PBO?data for the PBO?

UNAVCO PBO RT DataUNAVCO PBO RT Data

• What are the availability of real-time geodetic What are the availability of real-time geodetic products?products?• Currently UNAVCO in a beta-test phase streaming GPS Currently UNAVCO in a beta-test phase streaming GPS

data from ~84 PBO stations with an average receiver to data from ~84 PBO stations with an average receiver to PBO server latency of 1.11 s and an average of 93.2% PBO server latency of 1.11 s and an average of 93.2% data completeness. Data completeness is low because data completeness. Data completeness is low because we are testing the “good, the bad, and the ugly” data we are testing the “good, the bad, and the ugly” data communications scenarios. communications scenarios.

• For UNAVCO RT beta-test we are using a broad range For UNAVCO RT beta-test we are using a broad range data communications types including direct internet, data communications types including direct internet, VSAT, CDMA modem, and IP radio.VSAT, CDMA modem, and IP radio.

• Note these are raw data only. Providing epoch-epoch Note these are raw data only. Providing epoch-epoch solutions is a critical component of a science and solutions is a critical component of a science and hazards system.hazards system.

• What are real-time geodetic data and how do you What are real-time geodetic data and how do you assess the quality? assess the quality? • The definition of real-time data depends on the on the The definition of real-time data depends on the on the

science target, sampling, rate, and latency of data from science target, sampling, rate, and latency of data from instrument to user.instrument to user.

• For earthquake and volcano science and hazards For earthquake and volcano science and hazards applications we use a a 1 Hz sampling interval and latency applications we use a a 1 Hz sampling interval and latency requirement of < 5 seconds for data between station to requirement of < 5 seconds for data between station to processing center. processing center.

• Also need to define a “completeness” metric. For Also need to define a “completeness” metric. For earthquake and volcano hazards applications we use a earthquake and volcano hazards applications we use a 95% data completeness requirement. 95% data completeness requirement.

• Other considerations include station up-time and the Other considerations include station up-time and the ability to respond to maintenance issues. ability to respond to maintenance issues.

Real-time Geodetic DataReal-time Geodetic DataDefinitionsDefinitions

Latency and Latency and CompletenessCompleteness

Average latency 1.11 sAverage latency 1.11 s

Average completeness 93.2%Average completeness 93.2%

Cascadia Real-timeCascadia Real-time

• NSF proposed real-NSF proposed real-time upgrade of 232 time upgrade of 232 stations in Cascadia.stations in Cascadia.

• Funded as part of the Funded as part of the American Recovery American Recovery and Reinvestment Actand Reinvestment Act ((ARRA)ARRA)

• Three year Three year implementation planimplementation plan

• Initial upgrades Initial upgrades focused on ETS critical focused on ETS critical stationsstations

• Priority based on Priority based on science target, time science target, time line, location of line, location of personnelpersonnel

BeforeBefore

Cascadia Real-timeCascadia Real-time

• Station upgrades Station upgrades include power include power augmentation and augmentation and upgraded data upgraded data communicationscommunications• 3-G CDMA modems3-G CDMA modems

• removing VSATSremoving VSATS

• high speed radio high speed radio networksnetworks

• Purchase data Purchase data distribution and QC distribution and QC software including software including latency, latency, completeness, completeness, position estimationposition estimation

AfterAfter

Year 1Year 1

• Start work Fall Start work Fall 20092009

• Upgrade Upgrade Mount St. Mount St. Helens Helens stationsstations

• Upgrade 86 Upgrade 86 stations in stations in fore-arc fore-arc

• Work driven by Work driven by science targets science targets and location of and location of personnelpersonnel

Year Year 11

Year 2Year 2

Year Year 22

Year Year 11

• Upgrade 37 Upgrade 37 fore-arc stations fore-arc stations in Oregonin Oregon

• Upgrade high Upgrade high altitude sites altitude sites including Mt. including Mt. Shasta/LassenShasta/Lassen

Year 3Year 3

Year Year 33

Year Year 22

Year Year 11

• Upgrade Upgrade remainder of remainder of back-arc back-arc stationsstations

Project MilestonesProject Milestones

BudgetBudget

PersonnelPersonnel

Personnel Personnel FTEFTE Time (yrs.)Time (yrs.)

Field TechField Tech 0.250.25 33

Field Engineer IField Engineer I 22 33

RT Network AdminRT Network Admin 0.50.5 55

Database Database 0.250.25 55

Archive Archive 0.250.25 55

Education and Education and OutreachOutreach 0.50.5 55

Data DistributionData Distribution