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Last Update
05.10.2017

 

Eventech visit:

09:00-12:30  

 

 SLR station visit - limit 30 per group. Immediately after station visit there will be an option to go straight from SLR station to airport if necessary:

 9:30 - 12:00

13:00 - 16:30

 

 

Conference Program

Preliminary workshop program is also available in the Workshop Circular No. 1

Sunday, October 1

Venue: University Main Building

Workshop registration 

15:00 - 18:00

09:00-16:00 Analysis SC meeting (Room 415, Museum Hall)

16:00-18:00 ILRS Governing Board meeting (Room 415, Musem Hall)

Monday, October 2

Venue: University Main Building, Great Hall

Session 1: Satellite tracking and scheduling

09:00-16:00 Session chairs: Mike Pearlman, Carey Noll, Jens Steinborn, Frank Lemoine

 

1. Session 1A: Overview: (9:30 – 10:15)

a. Introduction (M. Pearlman – 10 min)

b. What is the role of GGOS? What is the ILRS role in GGOS? What are the important GGOS products and product requirements and how does the ILRS contribute to these areas (GGOS Focus Areas); (M. Rothacher or M. Pearlman - 20 min)

c. Results of the ILRS User Survey. Why are these missions important? What are their data products What do they achieve? What are the missions tracking requirements in terms of data volume, range accuracies, data acquisition requirements, normal point frequency, geographic distribution, tracking intervals, etc.)? Which of these missions can benefit from occasional or infrequent tracking, campaigns, etc? Which missions might benefit from sub-network tracking? (M. Pearlman – 15 min)

Break (10:15 – 10:30) (note we have only 15 minutes for this break)

2. Session 1B: Requirements by discipline (10:30 – 12:00)

a. Requirements for the ITRF (E. Pavlis – 13/2 min.)

b. Requirements for Altimeter Missions (F. Lemoine – 13/2 minutes) 

c. Requirements for GNSS (Galileo, GLONASS, Beidou, etc.), (K. Sosnica – 13/2 min.)

d. Requirements for GLONASS (M. Sadovnikov/V. Shargorodskiy – 13/2 min)

e. Requirements for CubeSat (M. Rothacher – 13/2 min)

f. Requirements for Supporting Other Applications (time varying gravity field,atmospheric drag) (T. Otsubo/M. Blossfeld – 13/2 min)

In our present mode of operation are we over committed?

Lunch (12:00 – 13:00)

3. Session 1C: Current ILRS Network Performance (CB 13:00 – 14:15)

a. Review of ILRS Network Performance (M. Pearlman – 15 min)

We currently have the 600/3500 (LAGEOS and LARES/all Satellites) pass criteria (target) for an “operational” station; What performance do the stations currently demonstrate? How much data are stations acquiring? Which missions are stations supporting and which are they not? What data quality do stations achieve? Are the new technology stations doing better than the legacy stations?

b. Rating Station Performance (E. Hoffman – 15 min)

We currently rate station performance primarily by data volume. Alternative approaches that might increase the value to our users and offer better incentives to the stations;

Are there other ideas on how we should rate stations performance? How do we give more incentive to the stations?

Should we classify stations based on their performance (say “operational“ versus“associate”)?

c. Setting ILRS Tracking Priorities (ILRS CB – 15 min)

How do we presently set tracking priorities?

How does your station set its priorities? Do you try to cover the whole list of satellites or do you focus on a shorter list? What other requirements is your station(s) trying to satisfy?

Discussion:

Come prepared to tell us what your station is doing or planning to do to improve performance.

Break (14:15 – 14:45)

4. Session 1D: ILRS Network Procedures (14:45 – 16:00)

Issues on Procedures; things that impact network productions and system transition

a. Issues with Satellite Predictions (J. Steinborn/G. Appleby) (13/2 min)

Are poor predictions causing a serious loss in network efficiency? Should we have a quality-criteria to rate our predictions? Would it do any good? Can we QC predictions before they are made public?

b. Impact of Supporting Other Applications (G. Kirchner/G. Appleby?) (13/2 min)

 How much active time do SLR systems spend on other applications like time transfer, debris tracking, etc.? Are stations able to get funding for these activities, either capital costs or support for operations? Are you building or contemplating building a dedicated station for other activities?

c. Long Term View (M. Pearlman) (10min)

What do our station network projections tell us about the future capability of the SLR network?

Where are our strengths and weaknesses? Is it an issue of data accuracy or data volume?

d. Poster Briefs (2 min each) (20 min)

16:00-18:00 Data Formats and Procedures SC meeting (Room 240)

18:00 Ice breaker

Tuesday, October 3

Venue: University Main Building, Great Hall

08:00-09:00 Transponder SC meeting (Room 240)

Session 2: Performance evaluation

09:00-16:00 Session chairs: Erricos Pavlis, Toshi Otsubo, Horst Mueller, Cinzia Luceri

 Time Topic Presenter/Remarks

Session 2A Overview & Ongoing ASC Efforts (50 minutes)

09:00 Introduction E. C. Pavlis

09:15 The ILRS ASC Pilot Project on systematic error estimation Cinzia Luceri

09:35 BKG’s Contribution to the ILRS Pilot Project on Systematic Errors Daniel Koenig

09:50 Break (30 minutes)

Session 2B State of the Network and Sources of Errors (100 minutes)

10:20 Evaluation of the present SLR tracking stations Horst Mueller

10:35 SLR error sources in the kHz repetition era: How should we improve the range measurement and the products? Toshimichi Otsubo

10:55 Variability of LAGEOS normal point sampling: causes and mitigation José Rodríguez

11:15 Effect of pulse length, rise time, signal strength, and type of detection system on the range correction for LAGEOS-2 David Arnold

11:35 Discussion (25 minutes)

12:00 Lunch (60 minutes)

Session 2C Hardware & External Tools to Improve Performance

13:00 From Time Transfer by Laser Ranging to space geodetic products Alexandre Belli

13:20 Transitioning the NASA SLR network of seven stations from the Time Interval Mode to the Event Timing Mode Thomas Varghese

13:40 Discussion (20 minutes)

14:00 Break (30 minutes)

Session 2D ILRS Tools for Network Support (130 minutes)

14:30 JCET Tools for the Assessment of the ILRS Stations’ Performance Erricos C. Pavlis

14:50 GOVUS – a new on-line tool for the evaluation of SLR observations to GPS, GLONASS, Galileo, BeiDou and QZSS Radosław Zajdel

15:10 The ILRS Rapid Service Mail a tool to inform stations quickly about potential problem T. Otsubo

15:30 Discussion/Closing Remarks (30 minutes)

16:00 Networks & Engineering Standing Committee (60 minutes)

17:00 Missions Standing Committee (60 minutes)

 

Wednesday, October 4

Venue: University Main Building, Great Hall

08:00-09:00 - Space Debris SG meeting (Room 240)

Session 3: Accuracy and scheduling

 

  • Riga Workshop - Accuracy and Scheduling
  •  What are the factors that are currently limiting performance (data quantity and quality)?
  • What tools and procedures do we need to expedite station discovery and reporting of problems and measures being taken to address the problems
  • Should we try to control returns at the single photon level or is it better to generate normal points more quickly with higher return rates?
  • Do we need a better or a more satellite and station specific definition of the NP?
  • Does past performance (data yield, system stability, data quality) history warrant an ILRS recommendation for even the best legacy stations to go kHz?
  • Would simultaneous observations by clustered stations on selected satellites provide insight into station biases, without expensive colocations?
  • Should the ILRS  provide individual tracking schedules for clustered stations to optimize satellite coverage?

Author SESSION 3a: STATION PERFORMANCE (09:00 - 10:15)

Evan Hoffman Introduction 5

What are the factors that are currently limiting performance (data quantity and quality)?

Evan Hoffman Survey Results and Discussion 15

Discussion Tools for tracking performance and reporting problems 15

Thomas Varghese Transitioning the NASA SLR network from the Time Interval Mode to Event Timing Mode with improved Data quality and quantity 15

John Degnan Challenges to Achieving Millimeter Accuracy Normal Points in Conventional Multiphoton and kHz Single Photon SLR Systems 15

Discussion Should we generate kHz system NPs  at the single photon level or is it better to generate them more quickly with higher return rates? 10

BREAK (10:15 -10:45) 30

SESSION 3b: NORMAL POINT GENERATION (10:45 - 12:00)

Chris Moore Generating normal points: Artifacts and Considerations 10

Evan Hoffman Single Photon vs Multiphoton, Multiphoton Charts, how much bias we saw at NGSLR 10

Discussion Do we need a better or a more satellite and station specific definition of the NP? 15

Discussion Does past performance history warrant an ILRS recommendation for even the best legacy stations to go kHz? 15

Discussion Occurrances of simultaneous LAGEOS/Cannonball Tracking, what do we get out of this? Should this be further studied? 15

Discussion Performance Rating Critera - How do we rate stations? Weighted Functions 10

LUNCH (12:00-13:00) 60

SESSION 3c: MISCELLANEOUS (13:00 - 14:15)

Ulrich Schreiber Delay compensated Optical Time and Frequency Distribution for Space Geodesy 15

Sven Bauer Time Bias Analysis and Prediction: a Prototype Service 15

Jorge Del Pino Sky Clarity Comparison between Riga and Metsahovi SLR Stations 15

Discussion Would simultaneous observations by clustered stations on selected satellites provide insight into station biases, without expensive colocations? 15

Discussion Should the ILRS  provide individual tracking schedules for clustered stations to optimize satellite coverage? 15

BREAK (14:15 - 14:45) 30

SESSION 3d: POSTERS (14:45 - 16:00)

Grzegorz Bury Impact of atmospheric pressure loading on SLR-derived station coordinates using range measurements to multi-GNSS satellites

Mateusz Drożdżewski Sensitivity of SLR observations to horizontal gradients of the tropospheric delay

Julie Horvath Scheduling the NASA SGSLR Network

Meng Wendong Satellite laser ranging with 1.06um wavelength in Shanghai SLR station

 

18:00-21:00 Workshop dinner

Thursday, October 5

Venue:  Center of Natural Sciences, Room 106 "Magnum"

08:00-09:00 - unused slot

Session 4: Automation and autonomous station operation

09:00-16:00 Session chairs: Chairs: Jan McGarry, Georg Kirchner, Chris Moore, Pierre Lauber

 

S. Riepl Automatic scheduling of satellite passages at the SOS-W

D. Hampf OOOS: A hardware-independent SLR control system 

S. Bauer Potsdam automation

H. Lim The new Korean SLR system and its automatic operation

Z. Liang Automated operations in Changchun station: current (part I)

C. Moore Mt Stromlo experience gained with automation: part I

C. Moore Mt Stromlo automation in progress: part II

Z.Liang Automated operations in Changchun station: plans (part II)

J. McGarry Plans for a fully automated SGSLR system: part I

E. Hoffman SGSLR acquisition and tracking automation

R. Ricklefs When Does Automation Make Sense?

J. Horvath Scheduling for the future NASA SGSLR Network (off-shoot of abstract submitted to session 3)

Based on the talks and others experiences, what automation is now working / operational in ILRS stations?

J. McGarry Plans for a fully automated SGSLR system: part II (future of SGSLR Network)

H. Donovan Safety/Security Concerns when Automating SLR Systems

Posters:

Y. Blagodyr Satellite laser ranging station “Lviv-1831” in Lviv, Ukraine. Status report.

J. Horvath Scheduling the NASA SGSLR Network (poster combined with Session 3)

Session 5: Wrap-Up

16:00 - 18:00 Session chairs:  Mike Pearlman, Kalvis Salmins ((Room "Magnum")

 

Session 5: Workshop Wrap-Up

Session Chairs: Mike Pearlman, Kalvis Salmins

 

 

16:00 Organization time

16:08 Session 1 (Satellite Tracking and Scheduling) Summary M. Pearlman

16:16 Session 2 (Performance Evaluation) Summary E. Pavlis

16:24 Session 3 (Accuracy and Scheduling) Summary E. Hoffman

16:32 Session 4 (Automation and Autonomous Station

 

Operation) Summary J. McGarry

Standing Committee/Study Group Summaries (1 – 2

slides)

(Aim for 7 minutes)

 

16:40 Analysis SC Summary E. Pavlis

16:48 Data Formats and Procedures SC Summary H. Mueller

16:56 Transponder SC Summary U. Schreiber

17:04 Networks and Engineering SC Summary G. Kirchner

17:12 Missions SC Summary T. Otsubo

17:20 Space Debris SG Summary G. Kirchner

17:28 Discussion and Resolutions M. Pearlman/K. Salmins

17:50 21 st International Workshop on Laser Ranging Plans J. Bennett/M. Fulton

18:00 Workshop Close

18:00-19:30 ILRS 2018 Workshop International Program Committee (Room 701,  "Caelum")

Friday, October 6

Eventech visit:

09:00-12:30  

 SLR station visit - limit 25 per group. Immediately after station visit there will be an option to go straight from SLR station to airport if necessary:

 9:30 - 12:00

13:00 - 16:30