# **International Laser Ranging Service** {#international-laser-ranging-service .Заголовок-тезиса}

**Eighth General Assembly**

**Washington, D.C.**

**Friday, October 11, 2002**

**08:30-12:00**

# **Meeting Summary** {#meeting-summary .Заголовок-тезиса}

The Eighth ILRS General Assembly of the International Laser Ranging
Service (ILRS) was held on October 11, 2002 at the Hyatt Regency on
Capitol Hill in Washington D.C. in conjunction with the Thirteenth
International Workshop on Laser Ranging. The agenda for this assembly is
included in Attachment 1. The slides presented at the General Assembly
available in a separate document of presentation material.

## **Introductory Remarks**

As outgoing chair of the ILRS Governing Board, John Degnan opened the
meeting with a review of the Governing Board meeting on October 9, 2002.
The new Board (see Attachment 2) was introduced, as was the new chair,
Werner Gurtner. Coordinators and deputy coordinators for the ILRS
Working Groups were also decided at the Board meeting (see Attachment
3).

The ILRS now includes more than forty SLR stations that, routinely track
22 retroreflector-equipped satellites and the Moon in support of user
needs. Through international partnerships, the global distribution of
SLR stations continues to improve, especially in the Southern
Hemisphere, where coverage has been historically weak. The recently
established MOBLAS-8 station in Tahiti and the MOBLAS-6 station in
Hartebeesthoek, South Africa have filled very important geographic gaps
the network. The station in Hartebeesthoek provides the first
multi-technique Fundamental Station in Africa with GPS and VLBI. The
Totally Integrated Geodetic Observatory (TIGO), the multi-technique
facility developed by the BKG in Germany, is now fully established at
Concepcion, Chile. This site provides the first Fundamental Station in
South America, with GPS, VLBI, a seismometer, and a superconducting
gravity meter.

In Europe, many of the SLR stations have undergone major renovation. At
Matera, Italy the new Matera Laser Ranging Observatory (MLRO) is going
through the last phases of its acceptance testing. This system has a
single shot ranging precision of a few mm and can range to
retroreflectors as far as the moon. The SLR station at GFZ is also being
replaced. The new French Transportable Laser Ranging System (FTLRS) has
been operating at Ajaccio on Corsica with special emphasis on the
support of the JASON altimetry mission. In the Ukraine, a new SLR
station is operating in Kiev, and a second is being established in Lviv.

The Yarragadee and new Mount Stromlo SLR systems continues to be among
the largest data contributors in the network. The Chinese Academy of
Surveying and Mapping in Beijing is building an SLR system for
installation at the San Juan Observatory in northwestern Argentina. Over
the past two years, a Chinese mobile TROS System has occupied sites at
Lhasa and Urumqi as part of a national geodetic program. In Japan, NASDA
is near completion of its new Global and high accUracy Trajectory
determination Systems (GUTS) at Tanegashima. On the other hand, the
Communications Research Laboratory (CRL) has closed its four Keystone
systems. The Saudi Arabian Laser Ranging Observatory (SALRO) in Riyadh
is once again operational and performing impressively after a period of
refurbishment.

In the U.S., the laser ranging systems have been fairly stable. The Maui
station is back in operation after a considerable downtime for system
repair and upgrade. A new SLR station at the U.S. Naval Research
Laboratory in Washington has joined the ILRS. Efforts continue on the
improvement in overall performance and reducing the cost of SLR
operations. Integration of the SLR2000 system also continues; testing is
scheduled for early 2003. Photos of many of the ILRS stations can be
found on the web site.

John Degnan also highlighted the strong contribution that the Working
Groups have made over the past year to the ILRS, noting in particular,
the activities of the Analysis Working Group as it progresses toward the
formation of standard solutions for use by the IERS and other users.

It was also noted with sincere regret, that our colleagues from Russia
and China were not able to participate in the meeting due to visa
difficulties entering the United States.

## **Central Bureau Report**

The Central Bureau continues to monitor the network data, providing
feedback to the stations on a regular basis. Quarterly Station Report
Cards are issued on station performance, and a suite of charts depicting
the performance parameters are placed on the ILRS web site. Station
performance is measured based on the Shanghai Criteria for data
quantity, quality, and latency. The site logs and local surveys have
been organized into a comprehensive Excel spread sheet for ease of
access and update (URL ftp://cddisa.gsfc.nasa.gov/pub/reports/slrlog/).
Forms have been submitted for all but the Russian stations; hopefully
this shortcoming will be rectified shortly. Some data for the other
stations is also incomplete and station personnel have been asked to
review and update the material that is now on-line.

The 2001 ILRS Annual Report is nearly complete. The Central Bureau
conducted the elections for the new ILRS Governing Board. Members of the
Central Bureau have been actively engaged in the organization and
running of the Thirteenth International Workshop on Laser Ranging held
in Washington, October 7 - 11, 2002.

It has been agreed to tabulate after-the-fact engineering biases on an
on-line data file accessible to the analysis community. The daily data
files will be corrected only if these biases are reported within 30 days
of acquisition. The data bias file is available at URL
ftp://cddisa.gsfc.nasa.gov/pub/slr/slrql/slr_bias_file.snx (the filename
will change in the near future).

Over the past six months, the ILRS web site has undergone major
renovation. The Working Group sections have been expanded. A new search
engine has been added and navigation has been made more user-friendly.
Additional internal and external links have been added, and dynamic
information has been added to the front page. The on-line bibliography
is being cleaned up to delete redundancies and format irregularities.
The references to all of the laser ranging workshop articles have been
placed in a standard format and categorized under general topics. We
next need to designate keywords to aid the search process. The Signal
Processing Group and the Central Bureau are working on a satellite
center-of-mass web page to tabulate the corrections available.

The issue of Station Qualification has been a perennial topic. The
Central Bureau has been working with the Governing Board to find a means
of qualifying stations based on performance without being callous to
stations that are operating in a limited fashion. After much iteration,
the latest version of Station Qualification would include all operating
stations as part of the ILRS Network, with special designation for those
stations operating at higher levels of performance. \"Core stations\"
would be those meeting the Shanghai criteria. Contributing Stations
would meet a lower, but still very useful level of data quality and
quantity. Stations that are not yet operating would be designated as
Associate Status. The discussions continue.

## **Science Coordinator Report**

Steve Klosko presented the science perspective for SLR data
contributions, in such products as gravity models, GM, etc. SLR provides
valuable input to the independent orbit assessment of GPS-generated
orbits, altimeter calibration, POD, and others. Some of the major
challenges for the SLR community include complimenting GPS activities
while lowering operating costs and densifying the network.

**Network Reports**

*EUROLAS.* Werner Gurtner reported that a EUROLAS Workshop was held at
Herstmonceux in March, with the theme "Detecting and Eliminating Errors
in the EUROLAS Network\"; the report is available through the ILRS
website
(http://ilrs.gsfc.nasa.gov/reports/special_reports/eurolas_workshop.html).
Acceptance testing on the Matera Laser Ranging Observatory is nearing
completion. Testing continues on the new GFZ SLR systems. The Cagliari
station plans to start observations in October 2002 after undergoing an
upgrade during the past year. A new EUROLAS station, Lviv Ukraine, has
started operations in 2002. Karel Hamal and Ivan Prochaska have
initiated the EUROLAS CALNet (Calibration and Orbit Evaluation Network)
proposal with the hopes to improve the capabilities of the European SLR
network. The proposal has been submitted to the Sixth Framework
Programme of the European Community for Research, Technological
Development and Demonstration. Finally, Werner Gurtner introduced the
new president of EUROLAS, Giuseppe Bianco.

*WPLTN.* Hiroo Kunimori expressed the regret of the WPLTN that delegates
from China and Russia were unable to attend the laser ranging workshop
and associated ILRS meetings. More than two thirds of the WPLTN
representatives could not attend. Kunimori reported that the National
Mapping Division of Geoscience Australia (formerly AUSLIG) continues
operation of Yarragadee and Mt. Stromlo, two of the highest productivity
stations in the ILRS network. EOS uses approximately ten percent of the
time at Mt. Stromlo for research and development efforts. Two of the
four CRL Keystone stations were dismantled in 2001; laser and
electronics were moved and integrated into the Koganei station for LRE
and ADEOS-2 tracking support. The Hydrographic and Oceanographic
Department of the Japan Coast Guard operates the Simosato station, which
has provided improved tracking over the last few years; The HTLRS
operations ceased in 2002. NASDA's GUTS system is in its final
integration phase at HTSI and will undergo a co-location test at GSFC
prior to its shipment to Japan for installation in Tanegashima Island at
the south tip of Japan. Four of the five Chinese systems (Changchun,
Shanghai, Beijing, and Kunming) are operational; Wuhan will resume
operations after its current testing program. The mobile TROS system
will be co-located with the VLBI system in Urumqi in early 2003. The
other Chinese mobile system, CTLRS, is at Xian for upgrading and
testing. The system under development for operation in Argentina is
currently undergoing tests. The SALRO system was re-commissioned in
early 2001. KACST has made a firm commitment to continue and develop
SALRO operations with the hopes of raising the profile of the sciences
within its organization. ISRO would like to re-enter the laser ranging
activity and is trying to locate a station in India. A WPLTN meeting is
planned for the May-June 2003 timeframe in Shanghai to discuss upgrades
of the network. Finally, Kunimori reported on the election of the new
WPLTN executive committee (see Attachment 4)

*NASA.* David Carter reported that the eight operational stations of
NASA network were performing well. MOBLAS-5 (Yarragadee) and -6
(Hartebeesthoek) have tracked in single-operator mode thus increasing
data volume. MOBLAS-8 (Tahiti) is currently training a new crewmember.
HOLLAS has completed the telescope control system upgrade.

*LLR.* Peter Shelus reviewed the tracking performance of the lunar
network (currently McDonald Observatory and Grasse). Possible future
lunar sites include Apache Point and APOLLO (presentations at the
workshop), Mt. Stromlo, Matera, and Wettzell. Analysis is currently done
in Paris and JPL with a positive evolution of precision and accuracy.
Science is the true driver of LLR with a goal to push the envelope of
technology.

**Data Center Report**

**Working Group Reports**

*Missions.* Hiroo Kunimori reported on the working group meeting held
October 7. The LRE campaign was held for one month in September 2001;
this proved to be a very difficult target to acquire. NASDA would like a
follow-up campaign in March through April 2003 and agrees to provide
better information prior to issuing a request to the ILRS. The Reflector
mission, with its distributed retroreflector array, was designed to
support POD research for space debris detection. SLR tracking began in
late December 2001; the campaign was continued through December 2002.
IPIE requested full-rate data for this campaign, which has prompted the
ILRS to look into providing full-rate data as a standard product.
STARSHINE-3, although not an official ILRS supported mission, was
tracked by some stations on a non-interference basis; the satellite is
scheduled to de-orbit on October 30, 2002. Meteor-3M which was launched
December 10, 2001 is carrying both the SAGE atmospheric experiment
developed by LRC and an optical Luneberg lens to test for improved SLR
tracking. When the on-board GPS/GLONASS receiver failed shortly after
launch, the ILRS agreed to elevate tracking from campaign to routine
status to support the SAGE instrument. The NASDA ADEOS-II is scheduled
for launch in November 2002. SLR support will be requested for the
initial 39 day POD phase. Routine tracking by the full network will
probably not be possible because of possible SLR damage to the Global
Imager instrument. In anticipation of the launch of ICESat in December
2002, HTSI, working with CSR, is modifying prediction software to make
use of GPS data in the orbit generation process. Gravity Probe B (GP-B)
is scheduled for launch in April 2003. The ANDE (Atmospheric Neutral
Drag Experiment) is being planned by NRL to calibrate atmospheric drag
effects on low Earth orbiting satellites. The experiment would monitor
the separation of two small spherical satellites with different
densities, as they orbit the Earth. STARSHINE-4 and 5 are anticipated
for Shuttle launch in the 2005-6 timeframe. This satellite pair will
also be used to study atmospheric drag by watch how the satellites
separate over time.

The mission request form for Cryosat has been received and is in review
with the Missions Working Group. A mission request has also been
approved for the NPOESS (National Polar-orbiting Operational
Environmental Satellite System) which is scheduled for launched in 2013.
Early mission planning has been done to determine if SLR can enhance the
mission.

*Network and Engineering.* Werner Gurtner gave a summary from the
meeting held on Monday, October 7. He reported that a site log database
has been developed by the ILRS Central Bureau and is available on the
web. The database consists of site log files and a master Excel
spreadsheet file. Procedures for updating the logs need to be finalized
and posted on the ILRS website. Efforts are underway to develop a
knowledge database; one component of this database is a bibliography
currently available on the website. Maintenance and update of this
bibliography is important; references should be directed to the CB.
Members of the group have proposed a hardware "hints and tips" web page
for stations, starting with the most commonly used components (e.g.,
C-SPADS, PMT's, etc.). The Signal Processing ad-hoc Working Group and
the CB are working on a web page containing satellite center-of-mass
information. The stations will provide a "wish list" of items to be
included in weekly analysis reports, thus making them easier to read and
pass on to management. The Networks and Engineering Working Group will
formulate requirements for these reports and pass these on to the
Analysis Working Group. A separate workshop to discuss adding dynamic
flexibility to the tracking priority list in order to increase the
effectiveness of data acquisition is being discussed. A time bias server
has been developed with AIUB and NERC; stations are urged to use this
new facility for real-time status exchange and status feedback. Finally,
Werner Gurtner announced that Georg Kirchner is the new coordinator for
the Network and Engineering Working Group.

*Data Formats and Procedures.* Wolfgang Seemueller reported that
two-color laser data are now routinely submitted to the data centers and
archived in the daily files. A new quality check procedure was installed
at EDC. A separate "study group" on full-rate data transmission and
archiving met on October 10 and has recommended a file naming convention
and data transmission procedures; an SLRMail will be issued on this
topic in the near future. The target date for implementation of
full-rate data flow is March 31, 2003. It was recommended that
calibration data be archived on-site in case analysts need further
information about a laser pass. Seemueller reiterated that SLR sites
need to ensure that the release flag in the data is updated if data are
resupplied. Furthermore, sites need to maintain their site logs with the
ILRS Central Bureau and ensure that local site ties are up to date. An
improved data replacement procedure has been implemented. The CDDIS and
EDC need to install procedures to routinely compare data holdings. An
effort is underway to provide standard software packages to SLR stations
such as normal point generation, integration of satellite predictions,
format and data integrity validation (from EDC). Volunteers are needed
to produce some of these routines.

*Refraction Study Group.* The group met on October 11 and discussed the
testing of new mapping functions and zenith path delay models. The
two-color ranging systems now operational are limited to about one cm
accuracy for the remote measurement of the refractive delay. Considering
the uncertainty of some millimeters, yielded by a comparison of
different refractive delay models, the two-color technique is still a
bit immature for this test at the moment. Hopefully the measuring
techniques will continue to improve rapidly. It was proposed at the
meeting to perform a mapping function evaluation by means of an analysis
of LAGEOS-2 normal point data spanning the period January 1999 through
December 2001. This evaluation process should be carried out twice,
first using the Marini atmospheric correction model and then using the
Saastomoinen zenith path delay and the mapping function provided by V.
Mendes. Several ILRS analysts (E. Pavlis, C. Luceri, T. Otsubo, R.
Govind) agreed to do this work and give a report at the next study group
meeting in Nice 2003.

*Prediction Formats Study Group.* Randy Ricklefs restated the purpose of
this group is to recommend a single laser ranging prediction format to
encompass Earth satellites, lunar reflectors, laser transponders on or
orbiting other solar system bodies, and laser transponders in transit.
Thus far the group has studied the feasibility of modifying the formats
to accommodate lunar and transponder objects and found these items could
be accommodated. A preliminary format is ready for review and sample
code is in early development. The group plans to distribute this initial
format to the laser community for comment.

*Analysis.* Ron Noomen discussed the various projects currently underway
within the Analysis Working Group. The group has met approximately twice
per year, most recently last week at HTSI in Lanham prior to the laser
ranging workshop. The pilot project on "positioning + earth orientation"
involved the analysis of data from 1999 (LAGEOS) and 2000-2001 (LAGEOS
and ETALON). The eventual outcome of this study will be the development
of an official ILRS product. A Call for Participation (CfP) for
generation of ILRS products (daily X/Y pole, LOD for input to IERS
Bulletin A) and daily X/Y pole, LOD, and coordinates (28-day arcs) is in
preparation. A draft of the CfP was discussed last week and will be
distributed to the analysis community this month for review. A two-month
test period will begin for participants in January 2003 with review by
the next AWG in April. It is hoped to have the new system running
operationally by May 1, 2003.

*Signal Processing.* Graham Appleby summarized the Signal Processing
ad-hoc Working Group activities. This small working group's main goal is
computing the system-dependent center of mass (CoM) values for spherical
satellites. Informal meetings have been held in recent years. Currently,
the SPWG is working with HTSI colleagues to form an ILRS database of
attitude algorithms for CoM corrections for the applications satellites.
The group has recommended to the Missions Working Group that future
applications for support include attitude algorithms as well as LRA CoM
vectors. Graham Appleby would like to encourage participation in this
group by other laser ranging colleagues.

### Current Mission Reports

*CHAMP (Ludwig Grunwaldt).* The satellite has been operational for more
than two years and all systems are running smoothly. In general there
has been good coverage with SLR data and the overall tracking statistics
are satisfactory for the mission. SLR data plays an important role in
the generation of orbit predictions, the validation of the microwave
tracking systems onboard, and for the quality control of gravity field
recovery.

*GRACE (Ludwig Grunwaldt).* The two satellites have been orbiting in
tandem (30 seconds apart) for over six months; the mission is in the
commissioning phase and will be transitioning to the
calibration/validation phase. Most stations are tracking alternate
passes; a few are able to interleave passes. The initial results show
significant improvements of gravity field modeling derived from
satellite-only data. GFZ generates precise orbit predictions from GPS
navigation and SLR data. Down weighted SLR data are used in POD for
gravity field recovery. Initially, GRACE-A tracking was greater than
that of GRACE-B; since August, a more balanced tracking from a majority
of stations has been achieved. Overall SLR tracking statistics are
satisfactory for GFZ orbit predictions used for the generation of
accurate orbit predictions and the calibration/validation of the
microwave tracking systems onboard and for the quality control of the
quality field recovery.

*ERS-2 (Ludwig Grunwaldt).* ERS-2 and Envisat are orbiting in tandem, 30
minutes apart. The role of SLR has changed over the life of the ERS-2
mission. Initially, PRARE was the primary tracking system, but as the
PRARE ground equipment aged and degraded, SLR became more important.
Precision orbits are being generated by combining SLR and PRARE data.
SLR data is considered sufficient for the mission and will be required
until mid-2004.

*ENVISAT (Bruno Greco).* Greco could not attend the meeting but reported
through email that tracking has been very good thus far and the project
hopes for continued success in the future. ENVISAT is orbiting in tandem
with ERS-2. Early results from ENVISAT orbit determination are very
promising. The project wishes to thank the ILRS community for
significantly contributing to this effort.

*TOPEX/Poseidon and Jason-1 (Richard Eanes).* Jason and Topex are
orbiting in tandem. Separation was increased from one minute to six
minutes in September, significantly reducing the interference between
the two satellites. Orbits now being produced with GPS, SLR, and DORIS
data on TOPEX are yielding 11-mm accuracy in radial height. Similar
results are being achieved with Jason. Tracking of TOPEX and Jason is
averaging 15 - 25 passes per day per satellite (15 was the goal). SLR
continues to be an important component in the orbital accuracy of these
two missions.

*ETALON (Ron Noomen).* The campaign, increasing the priority of the
Etalon 1 and 2 over the other high satellites, was initiated over a year
ago to test whether significant improvements could be achieved in EOP
solutions, GM, and station characterization. Since the start of the
campaign data yield has pretty much doubled from 100 to 200 passes per
month. The rms of the LOD parameter has decreased to 0.099 msec for
LAGEOS+ETALON from to a value of 0.162 msec for LAGEOS alone. Based on
the improvements seen to date, the increased tracking priority on the
ETALON has been made permanent status.

*METEOR-3M (Mike Cisewski).* METEOR-3M is a cooperative NASA/Russia
mission, carrying both the LRC SAGE atmospheric experiment and an
optical Luneberg lens to test for improved SLR tracking. SLR became the
primary (and only) tracking technique when the GPS/GLONASS receiver
failed shortly after launch. Operational support began in May 2002;
tracking has been sufficient for the SAGE-III requirements. MCC is
producing daily orbits and 24-hour predictions.

### Upcoming Mission Reports

*ADEOS --II (Maki Maeda).* ADEOS-II is scheduled for launch on December
14, 2002. The mission has requested a 40-day SLR tracking campaign for
testing and POD following launch. Due to possible vulnerability of the
Global Imager instrument, SLR tracking after the initial test phase will
be limited and carefully scheduled.

*ICESat (Peter Shelus).* ICESat will use a laser altimeter, GLAS
(Geoscience Laser Altimeter), to detect changes in polar ice sheets,
land mapping, and atmospheric science. The spacecraft will use two GPS
receivers and SLR (GFO-like LRA) for POD. Launch is scheduled for
December 12, 2002. Intense SLR tracking will support the six-month
calibration/validation phase, starting approximately Feb. 1, 2003.
Routine SLR tracking is scheduled to support the subsequent data
acquisition activities, but there are still some unresolved issues about
vulnerability of GLAS to laser radiation. The planned ground track
repeat pattern requires approximately weekly maneuvers, which will be
managed at the University of Colorado and reported through a web site.
This site will give an estimate of the change in the state vector and
the estimated time of execution of the maneuver. The University of
Texas/CSR, with HTSI, will be computing the routine SLR predictions for
ICESat; HTSI will incorporate GPS data into their prediction generation
software. Testing of this new software is currently underway. There is
some concern that the SLR direction can closely coincide with GLAS
telescope bore sight. One possibility is to use off-nadir pointing when
this situation occurs to avoid special planning at SLR stations.

*Activities in India (K. Elango).* The Indian Space Research
Organization (ISRO) has experience in operating the first generation
laser system at Kavalur, India for more than a decade in the 1970's and
80's and would like to revive the SLR program in the country. ISRO would
like to establish an SLR station in Bangalore; site selection has been
completed. ISRO has plans to foster space geodesy in India by
establishing a space geodesy center. Anybody have an SLR system that
they are willing to relocate to southern India?

### ILRS Annual Report

Carey Noll reported that the 2001 ILRS Annual Report will be published
shortly. The call for input to the 2002 report will be issued after the
first of the year. Plans are to publish a much shorter report that could
also be used for the ILRS input to the CSTG annual report. Individual
center reports will not be included but rather the coordinators of
various aspects of the service will be asked to generate one-page
summaries of their activities for the year.

### New Business

Mike Pearlman presented an item for follow-up; we need to ensure that
the authors of scientific publications recognize the IAG services that
provide data or other products that were essential for their article.
This matter will be discussed with the CSTG and the IAG. Continued
discussions on the station qualifications issue will continue to try to
reach closure. Richard Eanes recommended that letters from analysts and
more importantly from the ILRS can help stations that have trouble
finding funding; Degnan said that requests for such letters should be
directed to the ILRS CB. Frank Lemoine expressed concerns on data flow
when CDDIS or EDC are down. Eanes expressed support of the hourly flow
of SLR data, initiated in 2001.

Mike Pearlman reported that the next ILRS General Assembly will be held
in conjunction with the EGS/AGU/EUG Meeting in Nice France during the
week of April 7-11, 2003. The AWG will hold a two-day meeting during
this timeframe; the other working groups are encouraged to schedule
splinter meetings in Nice as well.

**Attachment 1**

**International Laser Ranging Service**

**Eighth General Assembly**

**Washington, D.C.**

**Friday, October 11, 2002**

**08:30-12:00**

# **Agenda** {#agenda .Заголовок-тезиса}

## **Introductory Remarks** J. Degnan 5 min

**Central Bureau Report** M. Pearlman 15 min

**Science Coordinator** S. Klosko 10 min

## **Network Reports (news and upcoming events)** 

## 

-   EUROLAS W. Gurtner 5 min

-   WPLTN H. Kunimori 5 min

-   NASA D. Carter/J. Degnan 5 min

-   Lunar Ranging Activities P. Shelus 5 min

**Data Center Report** W. Seemueller 5 min

**Working Group Reports**

-   Missions H. Kunimori/S. Wetzel 10 min

-   Networks & Engineering W. Gurtner 10 min

-   Data Formats & Procedures W. Seemueller 10 min

-   Refraction S. Riepl

-   Formats R. Ricklefs

-   Analysis R. Noomen 10 min

-   Pilots Projects

-   Signal Processing A/H G. Appleby 10 min

**Campaign and Mission Reports**

> (Are you getting enough data? What analyses are underway? Any results
> so far? Who is doing the analysis? Any changes in tracking that you
> would like to see? )

-   CHAMP L. Grunwaldt 5 min each

-   ERS-2 L. Grunwaldt

-   GRACE L. Grunwaldt

-   TOPEX/Poseidon and Jason R. Eanes

-   Etalon-1/2 R. Noomen

-   Reflector N. Parkhomenko/V. Shargorodsky

-   ENVISAT B. Greco

-   Meteor-3M N. Parkhomenko/V. Shargorodsky

## **Overview of Upcoming Missions** 

> (What actions do we need to take? What is not in place?)

-   ADEOS-2 M. Maeda 5 min each

-   ICESat P. Shelus

# Annual Report for 2002 C. Noll 5 min

**Discussions and New Business** M. Pearlman 20 min

## **Next Meeting** M. Pearlman 5 min

**Closing Comments** J. Degnan 5 min

**Rules:**

1.  [Time limits are firm]{.underline}. Presentations must be concise.
    Use only a few summary charts. Tell us what's new. Don't rehash old
    things. Additional charts may be included with the meeting report.

2.  Copies of your charts must be given to the Secretary at the time of
    the meeting.

3.  An anonymous ftp site is being set up so that your charts can be
    made available to participants prior to the meeting. You may add
    extra charts there if you wish.

**Attachment 2**

####### New ILRS Governing Board

**Ex-Officio Members:**

Director, Central Bureau: Mike Pearlman

Secretary, Central Bureau: Carey Noll

President of IAG Section 2: Hermann Drewes

**Members Appointed or Elected by Organizations:**

EUROLAS Network Representatives: Werner Gurtner

> Wolfgang Schleuter

NASA Network Representatives: Jan McGarry

> David Carter

WPLTN Representatives: Hiroo Kunimori

> Ben Greene

IERS Representative: Bob Schutz

**Members Elected by their International Peers:**

Data Center Representative: Wolfgang Seemueller

Analysis Representatives: Ron Noomen

> Graham Appleby

LLR Representative: Peter Shelus

At-Large Representatives: Georg Kirchner

> Ulrich Schreiber

**Attachment 3**

**New ILRS Working Group Coordinators**

**Analysis Working Group:**

Coordinator: Ron Noomen

Deputy Coordinator: Peter Shelus

**Data Formats and Procedures Working Group:**

Coordinator: Wolfgang Seemueller

Deputy Coordinator: Jan McGarry

**Missions Working Group:**

Coordinator: David Carter

Deputy Coordinator: Hiroo Kunimori

**Networks and Engineering Working Group:**

Coordinator: Georg Kirchner

Deputy Coordinator: Ulrich Schrieber

**Signal Processing ad hoc Working Group:**

Coordinator: Graham Appleby