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Tasks
User Assessment
Services Assessment
Site Information Review

Services Assessment

An early INDIGO task was to conduct a review of three of the IAG geodetic services (IGS, ILRS, IVS) which yielded an assessment of their common properties. The information is categorized as follows:

Service Information

Item

IGS

ILRS

IVS

IDS IERS

Service Inauguration

1994

1998

1999

2003 1988

Organization (Chart)

http://kb.igs.org/hc/en-us/articles/202064103-IGS-Organization-Chart

http://ilrs.gsfc.nasa.gov/about/
organization/index.html

http://ivscc.gsfc.nasa.gov/
about/org/index.html

http://ids-doris.org/
organization/schema.html
http://www.iers.org/IERS/
EN/Organization/organization.html

Terms of Reference

http://kb.igs.org/hc/en-us/articles/204189428-IGS-Terms-of-Reference-v-12-2014-

http://ilrs.gsfc.nasa.gov/about/
termsofref.html

http://ivscc.gsfc.nasa.gov/about/
org/documents/ivsTOR.html

http://ids-doris.org/
organization/tor.html
http://www.iers.org/IERS/
EN/Organization/About/ToR/ToR.html

Publications

Annual Reports, Technical Reports, Workshop Proceedings

SLR Performance Report Cards, Special Reports, Station Status Reports, CSTG SLR/LLR Annual Reports

Annual Reports, Newsletters, General Meeting Proceedings

Meeting Documentation/Presentations Annual Reports, Bulletins, Technical Notes

Meetings

IGS Workshop

General Assembly, Technical Workshop

General Meeting (bi-annual), Technical Meeting, Workshop

Workshops Workshops

Working Groups

http://kb.igs.org/hc/en-us/sections/200430016-Working-Group-Charters-and-Membership

Analysis, Data Formats and Procedures, Missions, Networks and Engineering, Predictions Format, Refraction, Signal Processing, Transponder

GPS Phase Center Mapping, IVS Product Specification and Observing Programs, VLBI2010

Analysis, Site Selection Site Survey and Co-location, Combination

Pilot Projects

 

tropospheric parameters (closed), baseline products

 

Mailing Lists

http://igs.org/mail/
mailindex.html

http://ilrs.gsfc.nasa.gov/about/
contact_ilrs/index.html

http://ivscc.gsfc.nasa.gov/
mailman/listinfo

http://ids-doris.org/
report/mails.html
http://www.iers.org/IERS/EN/Publications/
Messages/availVersions_iframe_fragment.html?nn=12932

FTP Archives

http://igs.org/about/
data-centers

http://ilrs.gsfc.nasa.gov/data_and_products/
data_centers/index.html

http://ivscc.gsfc.nasa.gov/
products-data/index.html

http://ids-doris.org/
data-products/info.html
http://www.iers.org/IERS/EN/
Organization/ProductCentres/pc.html

 

Data

Item

IGS

ILRS

IVS

IDS

Data Storage at …

Global, Regional, and Local Data Centers

Global, Regional, and Operational Data Centers

Data Centers

Data Centers

Primary (Global) Data Centers

CDDIS (USA), SIO (USA), IGN (France), KASI (S. Korea)

CDDIS (USA), EDC (Germany)

CDDIS (USA), BKG (Germany), OPAR (France)

CDDIS (USA), IGN (France)

Regional Data Centers

BKG (Germany), AUSLIG (Australia), NRCan (Canada), GODC (USA), JPL (USA)

Shanghai (China)

INAF (Italy), GeoDAF (Italy), NICT (Japan)

Data Availability

1990 to today

1976 to today

1979 to today

1991 to today

Data File Organization

daily, hourly, and sub-hourly files per station (grouped by year and day-of-year)

daily and monthly files per satellite and station (grouped by year and satellite)

sessionwise (grouped by year and session)

10-day "cycle" files per satellite (grouped by satellite)

Format of Data Files

RINEX (obs, nav, met)

NP format (quick-look), full-rate format

Goddard data base format (binary), NGS card format (ASCII)
ftp://cddis.gsfc.nasa.gov/
pub/vlbi/ivsdata/db
(example data base file)

DORIS format

Auxiliary Data Files

official abbrev. for rcvr, ant, radomes (rcvr_ant.tab); ant. phase center (igs_01.pcv); reference pt info (antenna.gra)

satellite predictions in tuned inter-range vector (TIRV) and consolidated prediction format (CPF) (by email or ftp)

observing schedules, session logs, met data, notes

satellite information

Standard compression software

Z compressed format

Z compressed format

Z compressed format

Z compressed format

Special compression software

Hatanaka

Data Transfer Mechanism

FTP (HTTP at SIO)

FTP

FTP

FTP

Notes: – non-existent; n/a not applicable

Products

Item

IGS

ILRS

IVS

IDS IERS

Analysis Centers (AC)

about 10 ACs

DEOS (The Netherlands), CNSS (Russia), CSR (USA) plus about 20 Associate ACs

about 20 ACs

about 7 ACs 3 product centers (TRF, EOP, rapid service/prediction), convention center

Software

Gipsy/OASIS, Bernese, GAMIT, and others

Geodyn, SATAN, UTOPIA, DOGS, EPOS-OC, CoGeoS, Concerto, and others

Calc/Solve, Modest, Occam, Gloria, SteelBreeze, Geosat

Gipsy/OASIS, Geodyn, Zoom, GINS, Bernese (under test) Various

Combined Solution

Analysis Center Coordinator and specialized coordinators

ASI (Italy) primary, DGFI (Germany) backup

Analysis Coordinator (Axel Nothnagel, Univ Bonn)

IDS Central Bureau Combination Centers

Products Overview

http://igs.org/products

http://ilrs.gsfc.nasa.gov/data_and_products/
products/index.html

http://ivscc.gsfc.nasa.gov/
products-data/products.html

http://ids-doris.org/
data-products/info.html
http://www.iers.org/IERS/EN/
Organization/ProductCentres/pc.html

Product Types:

Satellite Orbit Prediction

sub-daily predictions included in IGS ultra-rapid solution (igu)

daily predictions in TIRV (Tuned Inter-Range Vector) and CPF (Consolidated Prediction Format), Rapid LEO Predictions Team

n/a

- n/a

Satellite Orbit Determination

satellite ephemerides for GPS (3 types) and GLONASS

{satellite ephemerides}

n/a

{satellite ephemerides} n/a

Satellite Clocks

GPS clock information

n/a

n/a

n/a n/a

EOP

polar motion, polar motion rates, length-of-day

polar motion, length-of-day

session-wise EOP solution (EOP-S)

polar motion, length-of-day long term, rapid service, and predictions for EOP

1-hour Intensive UT1 solution (EOP-I)

TRF

IGS tracking station coordinates and velocities

weekly time series of ILRS station positions

station positions, velocities, correlations roughly every 3 months

weekly and monthly time series of DORIS station positions, cumulative solutions (positions/velocities), time series of coordinates of the TRF origin, station coordinate difference plots ITRF2000 (current product)

CRF

n/a

n/a

CRF solution at irregular time schedule

n/a ICRF

TROP

zenith tropospheric path delay estimates

troposphere parameters per session and station

IONO

global ionospheric maps

derived vertical total electron content (VTEC)

Contribution to IERS

station positions, polar motion, polar motion rates, length-of-day (weekly combined solutions)

station positions, polar motion, length-of-day (weekly combined solutions)

EOP & position (DSNX) (combined solutions by session)

station positions, polar motion, length-of-day (weekly combined solutions)

n/a

Notes: – non-existent; n/a not applicable; { } planned

Site Information

Item

IGS

ILRS

IVS

IDS

Clickable Map

http://igs.org/network

http://ilrs.gsfc.nasa.gov/network/
stations/index.html

http://ivscc.gsfc.nasa.gov/
stations/ns-map.html

http://ids-doris.org/
network/sitelogs.html

Clickable List

http://igs.org/network

http://ilrs.gsfc.nasa.gov/network/
stations/active/index.html

http://ivscc.gsfc.nasa.gov/about/
org/components/ns-list.html

http://ids-doris.org/
network/sitelogs.html

Form of Site Log

ASCII file, Unix format

HTML document or ASCII file

ASCII file, DOS format

HTML document or ASCII file

Example Site Log (Greenbelt)

http://igs.org/igsnetwork/
network_by_site.php?site=gode

http://ilrs.gsfc.nasa.gov/network/
stations/active/GODL_general.html

ftp://ivscc.gsfc.nasa.gov/pub/
config/ns/ggao.config.txt

http://ids-doris.org/network/
sitelogs/station.html?code=GREENBELT

Site Identification

[Sec 1] site name, 4-character ID, DOMES, CDP number

[Sec 1&3] site name, DOMES, CDP number, 4-char code

[Sec 1] site name, 8-letter code, DOMES, CDP number

[Sec 1] site name, DOMES, 4-char code

Approx. Station Coordinates

[Sec 2]

[Sec 2]

[Sec 2.1]

[Sec 1&3&4]

Tectonic Plate

[Sec 2]

[Sec 2]

[Sec 2.1]

[Sec 1]

Geologic Information

[Sec 1]

[Sec 1]

[Sec 1]

Monument/Marker Description

[Sec 1]

[Sec 1]

[Sec 2]

Local Surveys

[Sec 2.2]

Local Ties, Co-location

[Sec 5&7] local vectors between co-located techniques

[Sec 13] local vectors between co-located techniques,vectors between co-located SLR systems

[Sec 10] list of techniques, no local difference vectors

[Sec 5&6&7] local vectors between co-located techniques,vectors between collocated DORIS system

Instrument Information (antenna, receiver, laser)

[Sec 3&4] incl. history of antenna and receiver changes

[Sec 4&5&6]

[Sec 3&4]

[Sec 2&3]

Local Events (possibly affecting position)

[Sec 14]

Time/Frequency Standards

[Sec 6]

[Sec 9]

[Sec 8]

Meteorological Instrumentation

[Sec 8]

[Sec 12]

[Sec 7]

[Sec 8]

Field System Computer

[Sec 11]

Aircraft Detection

n/a

[Sec 11]

n/a

n/a

Local Contact Information

[Sec 11]

[Sec 15]

[Sec 13]

[Sec 9]

Notes: [Sec ?] Section in site log file; – non-existent; n/a not applicable

 

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Authors: Angelyn Moore, Carey Noll
Responsible NASA Official: Ruth Neilan
Last Updated: March 25, 2015