Santiago de Cuba
SLR System Configuration Definition
SYSTEM CONFIGURATION DEFINITION
===============================
SYSTEM NAME: CUBLAS (Santiago de Cuba)
PAD ID NO.: 19532001
ADDRESS: Centro Nacional de Investigaciones Sismologicas (CENAIS)
calle 17 e/ 4 y 6, No. 61 Vista Alegre
90400 Santiago de Cuba, Cuba
CONTACT: Dr. J. del Pino
PHONE: (+53)-226-41623
FAX: (+53)-226-41579
E-MAIL: cenais@ceniai.cu, cmict@ceniai.cu
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SECTION 1.0 - SYSTEM RANGING CAPABILITY
=======================================
SECTION 1.1 SYSTEM RANGING FEATURES
===================================
FEATURES /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTRON / / RANGING /
/ CAPABILITY/
===============================================================================
Calibration:
Internal / no / / / /
External / yes / 0.1 - 0.5 /05-17-94/ /
SECTION 1.2 ADVANCED SYSTEM RANGING FEATURES
============================================
TARGET /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTRON / / RANGING /
/ CAPABILITY/
===============================================================================
Two-Color Capability/ no / / / /
Manual Track / no / / / /
Tracking:
Semi-Automated / yes (*) / 0.1 - 0.5 /05-17-94/ /
Fully Automated / no / / / /
* Computer controlled tracking from manually set starting position *
Section 1.3 System Ranging Targets
===================================
TARGET /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTON / / RANGING /
/ CAPABILITY/
==============================================================================
STARLETTE / night / 0.1 - 0.5 /05-17-94/ /
STELLA / night / 0.1 - 0.5 /05-17-94/ /
ERS-1 / night / 0.1 - 0.5 /05-17-94/ /
AJISAI / night / 0.1 - 0.5 /05-17-94/ /
TOPEX / night / 0.1 - 0.5 /05-17-94/ /
LAGEOS 1 / night / 0.1 - 0.5 /05-17-94/ /
LAGEOS 2 / night / 0.1 - 0.5 /05-17-94/ /
ETALON 1 / no / / / night /
ETALON 2 / no / / / night /
GLONASS 3 / no / / / ? /
GPS-3,5 / no / / / night /
Geosynchronous / / / / /
Satellite / no / / / /
Moon / no / / / /
SECTION 2.0 - HARDWARE CONFIGURATION / CAPABILITY
=================================================
SECTION 2.1 LASER CONFIGURATION CATEGORY
========================================
LASER / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Type of Laser Medium / Nd:YAG / 05-17-94 / N/A / /
Energy / Pulse (mJ) / 20 mJ/ 05-17-94 / / /
Pulsewidth (ps) / 5000 ps/ 05-17-94 / / /
Beam Size / 3 cm/ 05-17-94 / / /
Beam Divergence(Half Angle) 50-1000 microrad/ 05-17-94 / / /
Beam Divergence Control / remote / 05-17-94 / / /
Amplitude Stability / 10 %/ 05-17-94 / / /
Timing Stability / 500 ns/ / / /
Transverse Mode Structure / cm/ / / /
Ranging Wavelength(s) / 532 nm/ 05-17-94 / / /
Repetition Rate / 10 Hz/ 05-17-94 / / /
Other / * see below * / / / /
* Laser is mounted on the telescope and moved together
with it *
SECTION 2.2 MOUNT CONFIGURATION CATAGORY
========================================
SECTION 2.2.1
=============
TELESCOPE/ MOUNT / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Telescope Type /Schmidt-Cassegrain/ 05-17-94 / N/A / /
Biaxial Telescope / / / / /
Monoaxial Telescope / yes / 05-17-94 / N/A / /
Mount Type / * see below * / 05-17-94 / / /
Field of View / 5 arcmin / 05-17-94 / / /
Focal Length / 3 m / 05-17-94 / / /
Magnification / / / / /
* 4 axis mount with the 1st (quasi-azimuthal) and 2nd (quasi-elevational) axis
fixed during tracking; 3rd axis: along track, 4th axis: small cross-track-
corrections *
Pointing Accuracy / 10 -15 arcsec / 05-17-94 / / /
After STARCAL
Satellite:
Common T/R Optical Path / no / / / /
Separate T/R Optical Path / yes / 05-17-94 / / /
Calibration:
Common T/R Optical Path / no / / / /
Separate T/R Optical Path / yes / 05-17-94 / / /
Orthogonality of Axes / 50 arcsec (*) / 05-17-94 / / /
* Orthogonality between 1st and 2nd axis ! *
Wobble on Each Axis:
Elevation / / / / /
Azimuth / / / / /
Elevation (4th axis!) * see below *
- Range / -20 - + 20 deg / 05-17-94 / / /
- Encoder Resolution / 6 e-4 deg / 05-17-94 / / /
- Position Jitter / 5 arcsec / 05-17-94 / / /
- Maximum EL Velocity / 0.1 deg/sec / 05-17-94 / / /
- Maximum EL Acceleration/ 0.05 deg/sec/sec/ 05-17-94 / / /
Azimuth (3rd axis!) * see below *
- Range / -100 - +100 deg / 05-17-94 / / /
- Encoder Resolution / 1.25 e-3 deg / 05-17-94 / / /
- Position Jitter / 10 arcsec / 05-17-94 / / /
- Maximum Az Velocity / 0.7 deg/sec / 05-17-94 / / /
- Maximum Az Acceleration/ 0.5 deg/sec/sec / 05-17-94 / / /
PRIMARY MIRROR / / / / /
Type / spherical / 05-17-94 / / /
Clear Aperture (CA) / 40 cm / 05-17-94 / / /
Focal Length / 75 cm / 05-17-94 / / /
Optical Coating / Aluminium / 05-17-94 / / /
SECONDARY MIRROR / / / / /
Type / aspherical / 05-17-94 / / /
Clear Aperture (CA) / 15 cm / 05-17-94 / / /
Focal Length / / / / /
Optical Coating / Aluminium / 05-17-94 / / /
TERTIARY MIRROR / none / / / /
Type / / / / /
Clear Aperture / / / / /
COUDE MIRRORS / none / / / /
Type / / / / /
Clear Aperture / / / / /
Optical Coating / / / / /
SECTION 2.3 OPTICAL CONFIGURATION CATAGORY
==========================================
TRANSMIT/ RECEIVE OPTICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
T/R Coupling Scheme:
- Type / none / / / /
- Coupling Efficiency / / / / /
Spatial Filter: / / / / /
- Field of View / 2 arcmin / 05-17-94 / / /
Band-Pass Filter: / / / / /
- Type / dielectric / 05-17-94 / / /
- Bandwidth / 2 nm / 05-17-94 / / /
- Blocking Bandwidth / UV - IR / 05-17-94 / / /
-Transmission Efficiency / 0.6 / 05-17-94 / / /
Receive Signal Amplitude
Control Mechanism / none / / / /
SECTION 2.4 TRANSMIT/ RECEIVE (T/R) ELECTRONICS CONFIGURATION SECTION
=====================================================================
T/R ELECTRONICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Transmit Detector: Si-Photodiode
- Quantum Efficiency / 0.2 @ 532 nm / 05-17-94 / / /
- Gain / / / / /
- Bandwidth / 1 GHz / 05-17-94 / / /
- Jitter (single pe) / 0.5 ns (*) / 05-17-94 / / /
- Impulse Response (*) = see below
- Pulse Width / 5 ns (*) / 05-17-94 / / /
- Rise Time / 4 ns (*) / 05-17-94 / / /
- Dynamic Range / 0.1 - 1 V / 05-17-94 / / /
Receive Detector(s) Si-APD RCA C 30902
- Quantum Efficiency / 0.3 @ 532 nm / 05-17-94 / / /
- Gain / 1e9 / 05-17-94 / / /
- Bandwidth / 1 GHz / 05-17-94 / / /
- Jitter (single pe) / 2.3 ns (*) / 05-17-94 / / /
- Impulse Response
Pulse Width/Rise Time / 10 ns/ 2 ns / 05-17-94 / / /
- Dynamic Range / 0.1 - 0.5 pe / 05-17-94 / / /
Amplifier / none / / / /
- Type: / / / / /
- Bandwidth: / / / / /
- Jitter: / / / / /
- Dynamic Range / / / / /
TARGET IMAGING Capability / none / / / /
- Type of camera / / / / /
- Gain / / / / /
- Sensitivity / / / / /
Signal Processing Technique/ none / / / /
- Type of Device / / / / /
- CFD:
- Length of External
Delay Cable
- Bandwidth / / / / /
- Dynamic Range(pe) / / / / /
- Jitter / / / / /
* all parameters determined mainly by the laser pulse width (5 ns) *
EVENT TIMER or TIME OF FLIGHT MEASUREMENT? Time-of-flight
- Clock Frequency / 5 MHz / 05-17-94 / / /
- Number of Channels / 1 / 05-17-94 / / /
- Number of Verniers / / / / /
- Minimum Dead Time / / / / /
- Time Resolution / 4 ps / 05-17-94 / / /
- Aggregate Jitter / 20 ps / 05-17-94 / / /
Amplitude Measurement / none / / / /
- Type of Device / / / / /
- Bandwidth / / / / /
- Accuracy / / / / /
- Part of Data Stream? / / / / /
System Delay Calibration / / / / /
Internal Calibration Capability
Location of Target(s) / / / / /
Range of Target(s) / / / / /
External Calibration Capability
Location of Target #1 / * see below * / / / /
Range(s) of Target #1 / 1.99 m / 05-17-94 / / /
Location of Target #2 / Hill / 05-17-94 / / /
Range of Target #2 / 1.5 km / 05-17-94 / / /
* Target #1 is a dual diffuse scattering short way target, attached directly
in front of the telescope; Range #1 is the full way via both scatterers
Target #2 is a flat diffuse scattering board *
SECTION 2.6 TIMING CONFIGURATION SECTION
========================================
TIMING / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Frequency Standard(s) used/ Rb / GPS / 05-17-94 / / /
Frequencies / 5 MHz / 05-17-94 / / /
Short-Term Stability / 1 e-10 / 05-17-94 / / /
Long-Term Stability / 1 e-9 / 05-17-94 / / /
Epoch Time Measurement: / / / / /
- Type of Device / selfmade / 05-17-94 / / /
- Resolution / 1 microsec / 05-17-94 / / /
- Timing Closure / 100 ns / 05-17-94 / / /
SECTION 2.7 METEOROLOGICAL SENSORS CONFIGURATION CATAGORY
=========================================================
METEOROLOGICAL SENSORS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Thermometer / / / / /
Type / Pt- Resistor / 05-17-94 / / /
Accuracy (calibrated) / 0.3 K / 05-17-94 / / /
Resolution / 0.1 K / 05-17-94 / / /
Range / / / / /
Barometric Pressure System/ / / / /
Type / Aneroid / 05-17-94 / / /
Accuracy (calibrated) / 0.2 hPa / 05-17-94 / / /
Range / 900-1100 hPa / 05-17-94 / / /
Relative Humidity System / / / / /
Type / Hair-hygrometer / 05-17-94 / / /
System Accuracy / 5 per cent / 05-17-94 / / /
Resolution / 1 per cent / 05-17-94 / / /
System Range / 20-100 per cent/ 05-17-94 / / /
Wind Measurement System / none / / / /
Type / / / / /
Type: / / / / /
Sensor / / / / /
Range / / / / /
Accuracy / / / / /
Resolution / / / / /
Threshold / / / / /
SECTION 4.0 SURVEY MEASUREMENT CONFIGURATION / CAPABILITY
=========================================================
SECTION 4.1 SURVEY MEASUREMENTS
===============================
SURVEYING INSTRUMENT / ACCURACY / PRECISION
============================================================================
GEODIMETER /3mm(height), 2mm(distance) /
/ /
/ /
SECTION 4.2 SURVEY ANALYSIS
===========================
SURVEY ANALYSIS TECHNIQUE
================================================================================
* Survey within a local geodetic network. Classical network adjustment
* procedures processing of network is still under way, results will be
* reported later
SECTION 4.3 SURVEY CALIBRATION TARGET
=====================================
TARGET / TYPE / RANGE / AZ / EL / RANGE / RANGE / SHORT / LONG
/ / ACCURACY/ / / PRECISION / / TERM / TERM
/ / / / / / / STABILITY / STABILITY
===============================================================================
1 / / / / / / / /
2 / / / / / / / /
3 / / / / / / / /
4 / / / / / / / /
SECTION 4.4 ECCENTRICITY DETERMINATION
======================================
/ NORTH / EAST / UP
===============================================================================
Mean Value / / /
Accuracy / / /
Precision / / /
Short Term Stability / / /
Long Term Stability / / /
SECTION 5.0 CALIBRATION TECHNIQUE / CAPABILITY
==============================================
SECTION 5.1 CALIBRATION DEVICES AND FREQUENCY
=============================================
===============================================================================
// FREQUENCY
===============================================================================
DEVICE/ FEATURE / SATELLITE / PASS / DAY / MONTH / YEAR
===============================================================================
Event Timer / / / / /
Time of Flight Devices / / / / / X
Discriminator / / / / /
Pressure Sensor / / / / / X
Temperature Sensor / / / / / X
Timing System / / / X / /
System Delay / / X / / /
SECTION 6.0 SYSTEM TIMING CLOSURE CONFIGURATION
===============================================
SECTION 6.1 TIMING CLOSURE
===========================
Reference Time: Rb-standard + GPS
Accuracy of Timing: 200 ns
Modeling of Time Drift: no
SECTION 7.0 SYSTEM DATA ANALYSIS CONFIGURATION / CAPABILITY
===========================================================
SECTION 7.1 DATA ANALYSIS
=========================
DATA CORRECTIONS ( YES : NO ) / ADDITIONAL INFORMATION
=============================================================================
7.1.1 Transmit Signal Amplitudes: no /
7.1.2 Receive Signal Amplitudes: no / APD is delivering uniform
receive signal; care is
taken to obtain all
ranging in single-photon
level
7.1.3 Timing no / UTC(GPS) from GPS timing
receiver is used directly
7.1.4 Instrument Non-Linearities no /
7.1.5 Geometric Corrections yes / correction for angle of
4th axis is done
7.1.6 Atmosphere no /
SECTION 7.2 System Delay Computation:
======================================
SYSTEM DELAY COMPUTATION FREQUENCY / ( YES : NO ) /ADDITIONAL INFORMATION
===============================================================================
7.2.1 Shot by Shot: / no /
7.2.2 Burst or Short Time Aggregate: / no /
7.2.3 Aggregate: / yes / pre-/postpass
SECTION 7.3 DATA ANALYSIS TECHNIQUES / CAPABILITIES
===================================================
7.3.1 Normal Point Computation: On-site normal points for all
satellites
7.3.2 Fitting Routine (Algorithms): Orbital integrator by Appleby &
Sinclair (RGO); modified version
for use on PC
7.3.3 Noise Filtering and Editing Procedures: 1. O-C based on IRV's
2. polynomial fitting of
residual (poly order as
low as possible)
3. editing (usually 2.5 sigma)
7.3.4 Data Quality Control Procedures: LAGEOS 1/2: weekly reports from
UoT/CSR (Eanes)
others: DDNA (CDSLR/OAS)
7.3.5 System Computational Capability: PC 486 type
SECTION 8.0 SYSTEM ATMOSPHERIC TECHNIQUES
==========================================
SECTION 8.1 ATMOSPHERIC MODEL
=============================
8.1 Atmospheric Model Used: none
* ( PLEASE DESCRIBE THE MODEL IN AS MUCH DETAIL AS POSSIBLE )
SECTION 9.0 SYSTEM PERFORMANCE CHARACTERISTICS
================================================
SECTION 9.1 RANGING SYSTEM ERRORS
=================================
RANGING SYSTEM ERRORS / ACCURACY / 1 SIGMA / PEAK - PEAK / DATE /
================================================================================
Temporal Stability / / 5 cm / 10 cm / /
Wavefront Distortion / / *see below / / /
Signal Strength Dependence / /**see below / / /
Calibration Path / / 1 mm / / /
Mount Eccentricities / / 1 mm / / /
Meteorological Measurement / / 2 mm / / /
Event Timer / / / / /
Time of Flight Measurement / /***15 cm / / /
Epoch Time Measurement / / 3 mm / / /
Data Analysis / / / / /
Normal Point Computation / / 0.5- 1 cm / / /
System Delay Computation / / / / /
Comments:
* not determined, but expected below 1 cm (laser is operated in transverse
fundamental mode)
** APD RCD 30902 alone is delivering about -250ps/decade for levels above 1 pe
Combined influence of 5ns-laser+APD ist stronger: about 3-5 ns/decade; for
this reason the station is operated under strict single-photon conditions
for all targets
*** Combined influence of laser+electronics; TOF-counter alone: 5 mm
--
Dr. L. Grunwaldt
GeoForschungsZentrum Potsdam
Telegrafenberg A17
D-14473 Potsdam
Germany
E-Mail: grun@gfz-potsdam.de
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