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Eighth ILRS General Assembly
Washington, D.C.
Friday, October 11, 2002
08:30-12:00
Meeting Summary
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://cddis.gsfc.nasa.gov/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://cddis.gsfc.nasa.gov/slr/data/npt/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.
Eighth ILRS General Assembly
Washington, D.C.
Friday, October 11, 2002
08:30-12:00
Agenda
| 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:
- Time limits are firm. 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.
- Copies of your charts must be given to the Secretary at the time of the meeting.
- 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.
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 |
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 |
