Item

IGS

ILRS

IVS

Service Inauguration

1994

1998

1999

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

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

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

Meetings

IGS Workshop

General Assembly, Technical Workshop

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

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

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

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

Item

IGS

ILRS

IVS

Data Storage at …

Global, Regional, and Local Data Centers

Global, Regional, and Operational 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)

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

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)

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)

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

Standard compression software

Z compressed format

Z compressed format

Z compressed format

Special compression software

Hatanaka

–

–

Data Transfer Mechanism

FTP (HTTP at SIO)

FTP

FTP

Item

IGS

ILRS

IVS

Analysis Centers (AC)

about 10 ACs

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

about 20 ACs

Software

Gipsy/OASIS, Bernese, GAMIT, and others

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

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

Combined Solution

Analysis Center Coordinator and specialized coordinators

ASI (Italy) primary, DGFI (Germany) backup

Analysis Coordinator (Axel Nothnagel, Univ Bonn)

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

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

Satellite Orbit Determination

satellite ephemerides for GPS (3 types) and GLONASS

{satellite ephemerides}

n/a

Satellite Clocks

GPS clock information

n/a

n/a

EOP

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

polar motion, length-of-day

session-wise EOP solution (EOP-S)

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

CRF

n/a

n/a

CRF solution at irregular time schedule

TROP

zenith tropospheric path delay estimates

–

troposphere parameters per session and station

IONO

global ionospheric maps

–

–

Contribution to IERS

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)

Item

IGS

ILRS

IVS

Clickable Map

http://igs.org/network

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

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

Form of Site Log

ASCII file, Unix format

HTML document or ASCII file

ASCII file, DOS format

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

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]