# Presentation: 089046

## EarthScope Plate Boundary Observatory Status Update

- Greg Anderson
- PBO Data Products Manager
- UNAVCO
- anderson@unavco.org
*CORS Users Forum, Fort Worth TX*
*25 September 2007*

## Acknowledgments

- EarthScope is funded by the National Science Foundation and conducted in partnership with the US Geological Survey.
- EarthScope is being constructed, operated, and maintained as a collaborative effort with UNAVCO, IRIS, and Stanford University, with contributions from NASA and several other national and international organizations.

## EarthScope

## PBO Instruments

- 1100 Continuous GPS

- 5 Laser Strainmeters

- 103 Borehole Strainmeters
- and Seismometers

- 28 Shallow
- Borehole
- Tiltmeters

## Network Status

- GPS:
- 889 of 1100 built
- 95% operational
- Strain:
- 47 of 108 built
- 85% operational
- Seismic:
- 40 of 103 built
- 90% operational
- Tilt:
- 8 of 28 built
- 100% operational

## 700th PBO GPS

- P248 - Black Diamond Mines, Antioch, CA
- 20 Sep 2007

## Science Highlights

- In first 15 years, capture at least one
- earthquake
- volcanic/magmatic crisis
- aseismic event

- In first 4 years:
- 2 significant earthquakes
- 2 volcanic crises
- 3 episodic tremor & slip events

## 675 GB raw data

- 95% data return

**Notes:**
Cumulative PBO data volume growth by time and data type.  Numbers are in gigabytes.  Total data as of the end of December 2006 is 335.6 GB.

## GPS Data Products

**Notes:**
GPS Position RMS: 1-1.5 mm horizontal, 4 mm vertical

## 2006: 1 TB GPS Served

- 62 US institutions & 9 foreign countries

- 78% USGS
- 22% NGS

- 51% U-Miami
- 17% UWM
- 17% UCSD
- 16% Others

**Notes:**
Total volume, broken down by destination domain.  We have corrected out unavco.org access, access by Internet ‘bots’, and access by PBO analysis centers.  These numbers are for 2006.

## Details on station X

- _[http://pboweb.unavco.org/stations/XXXX](http://pboweb.unavco.org/stations/XXXX)_

**Notes:**
GPS data delivery examples.  The station homepage provides one-stop access to all products involving a given station, such as raw and RINEX data, time series in multiple formats, network velocity fields in multiple formats, and so on.  The UNAVCO Facility also provides a tool to search for and download data from PBO and Nucleus (as well as many other) stations.  We anticipate further enhancements for these tools by the end of the MRE, but will only maintain them during the O&M period.

## GPS Data Delivery

**Notes:**
GPS data delivery examples.  The station homepage provides one-stop access to all products involving a given station, such as raw and RINEX data, time series in multiple formats, network velocity fields in multiple formats, and so on.  The UNAVCO Facility also provides a tool to search for and download data from PBO and Nucleus (as well as many other) stations.  We anticipate further enhancements for these tools by the end of the MRE, but will only maintain them during the O&M period.

## Google Earth

- Network Progress

- GPS Velocities (2D)

- GPS Velocities (3D)

## Streaming GPS

- Langbein et al.,
*BSSA* 2006

**Notes:**
In order to help develop high-rate, real-time GPS, PBO is developing a system to stream GPS data via the Internet using the Ntrip protocol.  It is under construction and undergoing early testing.  We are looking for partners.

## Streaming GPS

- Langbein et al.,
*BSSA* 2006

**Notes:**
In order to help develop high-rate, real-time GPS, PBO is developing a system to stream GPS data via the Internet using the Ntrip protocol.  It is under construction and undergoing early testing.  We are looking for partners.

## Ntrip Streaming Data

**Notes:**
This is a generalized diagram for how we’ll stream data using Ntrip.
A NetRS streams BINEX data to Boulder via the usual telemetry.  It arrives at an instance of Keith’s code Sharc, which splits the stream into three streams: one BINEX stream to files for later use and BINEX and RTCM streams that go to the Ntrip server (“server” in this case is software, NOT hardware).  
The Ntrip server hands off data to the Ntrip caster, which replicates the streams and can provide them to one or more Ntrip clients.  There would be two physical servers -- one running sharc and the ntrip server, and the other running the caster and handling incoming requests.

## Current UStream Sites

**P066** P114 P181 P212 P213 P217 P218 P222 P225 P226 **P227** P229
- P236 P240 P242 P244 P376 **P451** P471 P476 P477 P494 P496 P497
- P498 P499 P500 P502 P506 P509 P510 P584 P623 SLAC TOST

**Notes:**
35 stations currently active
All except bold stations use mobile phone modems
Orange are in northern California
Blue are in southern California

## Latency Summary

**Notes:**
Preliminary latency results
Cell modem stations have quite good latency: 95% of the time under 1.1 sec
VSAT stations are not so good

Stability/data completeness studies underway, preliminary results suggest two modes: really good stations and really bad stations.  No quantitative info yet.

## UStream Early Testers

- SCVWD

- EBRP

- UCSD/NASA

- City of Salem

- LA MWD

## Where do I learn more?

- PBO Streaming GPS Homepage (_[http://pboweb.unavco.org/rtgps](http://pboweb.unavco.org/rtgps)_)

## PBO is geodetic component of EarthScope project

Network Operations Status
700th new GPS station installed!
95% operational

Data Management Status
95% of stations have returned data
675 GB raw data/364 GB GPS 
Special data requests: http://pboweb.unavco.org/data_request

Real-Time Data Progress & Plans
Ntrip-based UStream system in place
http://pboweb.unavco.org/rtgps

- Network Operations Status
- 700th new GPS station installed!
- 95% operational
- Data Management Status
- 95% of stations have returned data
- 675 GB raw data/364 GB GPS
- Special data requests: http://pboweb.unavco.org/data_request
- Real-Time Data Progress & Plans
- Ntrip-based UStream system in place
- _http://pboweb.unavco.org/rtgps_

- Summary

## For more information...