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[IGS-RTWG-13] Update and Upcoming Pilot Project
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IGS-RTWG Mail 30 Jan 07:59:21 PST 2006 Message Number 13
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Author: Mark Caissy
Dear RTWG Members,
I am writing to update you on the progress of the working group since the
Focus Review Session held last spring in Vienna and to also provide you with
information pertaining to an upcoming IGS Real-time Pilot Project.
PROGRESS SINCE 2005 FOCUS REVIEW SESSION (compiled in early December)
The emphasis has been in the following areas.
1) Expansion of the RT-network
There are 46 active stations although global distribution remains an issue.
Geoscience Australia made very significant progress in 2005. They are now
contributing 16 stations from their extensive network on two continents.
NRCan continues to deliver a number of stations from it's national network
and JPL has most recently added Kokee Park (Hawaii) to the list of stations
they are contributing ESA continues to deliver data reliably from several
sites and they are planning to add to this list. GFZ's contributions were
down during 2005 but they are fully committed to the initiative and intend
to have a number of stations back online soon. The Royal Observatory of
Belgium is now operating station BRUS using the RTIGS toolset and a number
of stations from the BKG network that operate Javad receivers will soon be
integrated. The same applies to the Swedish network.
The following stations are currently available: (December 2005)
Count IGS Status Agency RTIGS #
1 LPGS Active GFZ 403
2 MADR Active JPL 33
3 GOLD Active JPL 32
4 TIDB Active JPL 34
5 KOKB Active JPL 44
6 AMC2 Active USNO/JPL 67
7 DLFT Active TUD/JPL 71
8 KIRU Active ESOC 300
9 MAS1 Active ESOC 301
10 STJO Active NRCan 102
11 HLFX Active NRCan/GFZ 115
12 NRC3 Active NRCan 110
13 ALGO Active NRCan 107
14 CHUR Active NRCan 105
15 YELL Active NRCan 104
16 DRA2 Active NRCan 108
17 ALBH Active NRCan 103
18 WINN Active NRCan 106
19 EUR1 Active NRCan 123
20 FLIU Active NGS 200
21 MSSC Active NGS/USM 201
22 USNO Active USNO 700
23 RIO1 Active IBGE 702
24 IENG Active IEN 704
25 NRL1 Active NRL 705
26 BRUS Active ROB/NRCan 707
27 DHLG Active SOPAC/NRCan 708
28 WIDC Active SOPAC/NRCan 709
29 DWHZ Active Doug Hogarth 710
30 DARW Active GSAUS 600
31 TOW2 Active GSAUS 601
32 CEDU Active GSAus 602
33 YAR2 Active GSAUS 603
34 ALIC Active GSAUS 604
35 MAW1 Active GSAUS 605
36 DAV1 Active GSAUS 606
37 CAS1 Active GSAUS 607
38 COCO Active GSAUS 608
39 KARR Active GSAUS 609
40 MOBS Active GSAUS 610
41 STR1 Active GSAUS 612
42 XMAS Active GSAUS 613
43 TID1 Active GSAUS 614
44 BUR1 Active GSAUS 615
45 HOB2 Active GSAUS 616
46 STR2 Active GSAUS 619
2) Increased involvement within the IGS and the user communities.
RTIGS data is being shared with 6 real-time centres including NRCan, JPL,
COSMIC, TUV, UCAT and NOAA. Additionally, RTIGS data is being sent in
real-time to 3 data centers (global/regional) (CDDIS, BKG and GA). The new
Korean data center (KASI) has received and will soon be installing the
archiving software (RTIGSA). RTIGS contributors are developing real-time
applications that range from atmospheric modeling (NOAA, COSMIC, UCAT), rt
clock estimation (NRCan, JPL), to assessing time and frequency transfer (IEN
who recently presented a poster at PTTI). Integrity monitoring of the IGU
product, a recommendation at the Berne meeting, is under development at TUV
and they recently presented a poster on this topic at the December AGU
conference.
3) Outreach
Both the IEN and TUV posters are demonstrating to the broader community that
the RTIGS prototype network is in place and is providing the opportunity to
develop real-time applications based on this new infrastructure. I had the
opportunity to participate in a panel session at the CGSIC meetings held
prior to ION and I also made a presentation on the work of the RTWG during
the CORS User Forum, also at the CGSIC meetings. The session had the theme
"Towards Real-time".
THE UPCOMING IGS REAL-TIME PILOT PROJECT
The Real-time IGS has matured to a point where it is now time to move from
the current prototype phase into a pilot project phase. The IGS Governing
Board has given approval that a Real-time Pilot Project be initiated.
IGS members from around the world are contributing real-time GPS data to the
Real-Time IGS (RTIGS). Other IGS partners are receiving the RTIGS data
stream and are developing real-time applications. At this time there are
more than 45 active stations and RTIGS data is being shared with a number of
real-time centers. Real-time centers are developing real-time applications
that range from ionospheric and tropospheric modeling, to assessing station
clocks and estimating GPS satellite clocks.
The following agencies are receiving RTIGS data:
1) Technical University of Vienna
2) Technical University of Catalonia
3) University Corporation for Atmospheric Research
4) National Oceanic and Atmospheric Administration
5) Jet Propulsion Laboratory
6) Natural Resources Canada
7) ESA
8) CDDIS
9) Geoscience's Australia
10) BKG
11) KASI (installing archiving software)
The following list of software is available to RTIGS users/contributors:
1) Real Time GPS Reader for AOA /Ashtech / (Javad soon to be released).
This software streams real-time data to an UDPRelay.
2) UDPRelay - distributes data in real time (data can be encrypted if
required)
3) RTIGS Archiver (RTIGSA) - archives the RTIGS data stream by
creating flat files
4) TEQC translates RTIGS data into RINEX format - works with files from
RTIGSA.
5) RTIGS Multicast Receive (RTIGSMR) - Provides a Real-time Application
Frame Work (provides application developers with a framework within which to
embed their code)
The protocols and tools required to share real-time GPS data have been
developed over that last few years. IGS members have shown significant
support for the RTIGS prototype by contributing data from over 45 stations.
Many IGS agencies have developed prototype applications that use the RTIGS
data streams. Moving to a Real-time Pilot Project is a logical next step.
It is foreseen that the Pilot Project will include:
1) A broad based call for participation
2) A level of commitment from participants
The Pilot Project will target a number of key areas and is expected to:
1) Result in an improved network of global stations. Reference frame
stations will be targeted.
2) Increase the reliability of the real-time data streams.
3) Involve global data centers and analysis centers in real-time
activities.
4) Result in the development of real-time IGS products including
real-time satellite clocks
I would very much like to hear your comments on this and other real-time
initiatives.
Regards
Mark Caissy
Chair IGS Real-time Working Group
-- a special thanks to Ken Macleod for assisting in the preparation of this
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