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SLR-Mail No.27

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Date:1996-10-11 22:00:00
Sender:Mike Pearlman <[Mailed Mike <PEARLMAN@cf1.harvard.edu>]>
Subject:[SLR-Mail] No. 27: Workshop Session on the Evaluation of SLR Network
Author:Mike Pearlman
Content:********************************************************************************
SLR Electronic Mail 1996-10-11 22:00:00 UTC Message No. 27
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Author: Mike Pearlman
Subject: Workshop Session on the Evaluation of SLR Network
Performance (or How do we do better!)


At the Workshop for Laser Ranging Instrumentation in Shanghai
in November, we are scheduling a session on the Evaluation of
SLR Performance. It will be held on Monday afternoon, November
11. The motivation for this session is to evaluate (1) how well
we are meeting the current scientific and applications needs of
our users and (2) how we can improve SLR network performance to
meet both current and future needs.

The session is being scheduled to follow directly the Science
Achievements and Applications Session in the morning which will
discuss scientific and applications requirements and quantify
data needs in terms of data quantity, quality, and geographic
and temporal distribution. At the afternoon session. we plan to
cover the following topics:

1. Who is using the SLR data? What science and engineering
applications are they studying? What satellites are they using?
Is the data sufficient? What is missing?

2. How good is the SLR performance? How do we evaluate it?

What is important? What is not important?

Assessment from the Operations Centers. Do they provide
anything that you should not already have at your station?

Evaluation from the Analysis Centers. How do they estimate the
biases and separate biases from other errors?

3. How do the stations provide quality control? How do they
evaluate their data? How much do they rely on the on-site
processes? How much do they rely on the analysis centers?

4. How do we ”baseline” these stations? What performance should
be considered (a) significant and (b) minimum level?

5. What do stations need to improve performance - on site and
from the global infrastructure?

This is a very ambitious agenda and we will need everybody´s
help to do an effective job. We will have one or more speakers
to help lead off the discussions in each area, but each station
should come prepared with the following:

1. What is new with your station since the last Workshop? Focus
primarily on items that have improved the quality and quantity
of your data. (one viewgraph only)

2. What do you do at your stations to assure the quality of the
data? How do you get an evaluation of your data quality? (one
viewgraph only)

(a) from on-site operational sources (calibration, short arc
fit, etc.) ?

(b) from off-site sources ( analysis feedback, etc.) ?

3. What improvements or additions to (a) on-site capabilities
and (b) off-site capabilities would help you monitor and
improve the performance of your station.

Bring some recent examples of performance anomalies at your
stations (both obvious errors and subtle effects are welcome -
bring at least one of each!). How did you diagnose them? What
did you do about them?

Please come prepared to join the discussion. This is a
workshop, not a formal seminar. This is the place to share your
experience with the other stations. Everyone can benefit.
Dr. Michael R. Pearlman
Harvard-Smithsonian
Center for Astrophysics
60 Garden St.
Cambridge MA 02138
tel. (617) 495-7481
fax. (617) 495-7105
e-mail. mpearlman@cfa.harvard.edu

[Mailed From: ”Mike” ]

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