Cagliari
SLR System Configuration Definition
SYSTEM CONFIGURATION DEFINITION
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SYSTEM NAME: AOCagliari (CAGLAS)
PAD ID NO.: 7548
ADDRESS: Poggio dei Pini Strada 54, 09012 CAPOTERRA(CA), ITALY
CONTACT: Dr Aldo Banni, Dr Leonardo Mureddu, Dr Angelo Poma
PHONE: +39 70 725246
FAX: +39 70 725425
E-MAIL: laser@astca1.ca.astro.it laser@vaxca2.infn.it
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SECTION 1.0 - SYSTEM RANGING CAPABILITY
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SECTION 1.1 SYSTEM RANGING FEATURES
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FEATURES /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTRON / / RANGING /
/ CAPABILITY/
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Calibration:
Internal / YES / 1-50 /5-11-94 / /
External / YES / 1-50 /5-11-94 / /
SECTION 1.2 ADVANCED SYSTEM RANGING FEATURES
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TARGET /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTRON / / RANGING /
/ CAPABILITY/
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Two-Color Capab/ N/A / / / YES /
Manual Track / N/A / / / /
Tracking:
Semi-Automated / N/A / / / /
Fully Automated/ YES / /10-10-93/ /
Section 1.3 System Ranging Targets
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TARGET /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTON / / RANGING /
/ CAPABILITY/
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STARLETTE / YES /NOT YET AVAILABLE/11-09-93/
STELLA / YES / " /11-08-93/
ERS-1 / YES / " /01-18-94/
AJISAI / YES / " /11-22-93/
TOPEX / YES / " /11-08-93/
LAGEOS 1 / YES / " /12-17-93/
LAGEOS 2 / YES / " /11-08-93/
ETALON 1 / N/A / / / PROBABLY
ETALON 2 / N/A / / / PROBABLY
GLONASS 3 / N/A / / / PROBABLY
GPS-3,5 / N/A / / / PROBABLY
Geosynchronous / N/A / / / PROBABLY
Moon / N/A / / /
SECTION 2.0 - HARDWARE CONFIGURATION / CAPABILITY
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SECTION 2.1 LASER CONFIGURATION CATEGORY
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LASER / SPECIFICATIONS / DATE / FUTURE /APPROX./
/ / / CHANGES / DATE /
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Type of Laser Medium / Nd:YAG /01-11-90 / / /
Energy / Pulse (mJ) / 65 mJ/ / / /
Pulsewidth (ps) / 100 ps/ / / /
Beam Size / 20 cm - final/ / / /
Beam Divergence(Half Angle) 0.25 urad/ / / /
Beam Divergence Control / YES / / / /
Amplitude Stability / 90 %/ / / /
Timing Stability / 0.5 ns/ / / /
Transverse Mode Structure / 300 cm/ / / /
Ranging Wavelength(s) / 532 nm/ / / /
Repetition Rate / 10 Hz/ / / /
Other / / / / /
SECTION 2.2 MOUNT CONFIGURATION CATAGORY
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SECTION 2.2.1
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TELESCOPE/ MOUNT / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
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Telescope Type / CASSEGRAIN-COUDE / 7-16-92 / / /
Biaxial Telescope / YES / / / /
Monoaxial Telescope / / / / /
Mount Type / ALTAZIMUTHAL / / / /
Field of View / 2 mrad / / / /
Focal Length / 11 m / / / /
Magnification / / / / /
Pointing Accuracy / 40 arcsec / / / /
After STARCAL
Satellite:
Common T/R Optical Path/ YES / / / /
Separate T/R Optical Path/ / / / /
Calibration:
Common T/R Optical Path/ YES / / / /
Separate T/R Optical Path/ N/A / / / /
Orthogonality of Axes / 0.06 degrees / / / /
Wobble on Each Axis:
Elevation / NOT YET MEASURED / / MEASURE / JUNE 94/
Azimuth / NOT YET MEASURED / / MEASURE / JUNE 94/
Elevation
- Range / 0-90 / / / /
- Encoder Resolution / 20 arcsec / / / /
- Position Jitter / 40 arcsec / / / /
- Maximum EL Velocity/ 15 d/sec / / / /
- Maximum EL Acceleration/ 5 d/sec^2 / / / /
Azimuth
- Range / 0-360 / / / /
- Encoder Resolution / 20 arcsec / / / /
- Position Jitter / 40 arcsec / / / /
- Maximum Az Velocity/ 11 d/sec / / / /
- Maximum Az Acceleration/ 4 d/sec^2 / / / /
PRIMARY MIRROR
Type / PARABOLIC / / / /
Clear Aperture (CA) / 500 mm / / / /
Focal Length / 1250 mm / / / /
Optical Coating / PROTECTED Al / / / /
SECONDARY MIRROR
Type / IPERBOLIC / / / /
Clear Aperture (CA) / 115 mm / / / /
Focal Length / -273.5 / / / /
Optical Coating / 99% 532 nm / / / /
TERTIARY MIRROR
Type / FLAT ELLIPTIC / / / /
Clear Aperture / 50x70 mm / / / /
COUDE MIRRORS
Type / FLAT ELLIPTIC / / / /
Clear Aperture / 50x70 mm / / / /
Optical Coating / 99% 532 nm / / / /
SECTION 2.3 OPTICAL CONFIGURATION CATAGORY
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TRANSMIT/RECEIVE / SPECIFICATIONS / DATE / FUTURE / APPROX./
OPTICS / / / CHANGES / DATE /
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T/R Coupling Scheme:
- Type / ROTATING MIRROR /10-05-93 /Hole Mirror /03-95 /
- Coupling Efficiency/ 72% / / / /
Spatial Filter:
- Field of View / 2 mrad / / / /
Band-Pass Filter:
- Type / INTERFERENCE / / / /
- Bandwidth / 1 nm FWHM / / / /
- Blocking Bandwidth / 1x10-4 / / / /
-Transmission Efficiency/ 50% / / / /
Receive Signal Amplitude
Control Mechanism / N/A / / / /
SECTION 2.4 TRANSMIT/ RECEIVE (T/R) ELECTRONICS CONFIGURATION SECTION
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T/R ELECTRONICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
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Transmit Detector:
- Type / SILICON PD /05-14-94 / SPAD /LATE 94 /
- Quantum Efficiency / 77% / / / /
- Gain / / / / /
- Bandwidth / 400-1000 nm / / / /
- Jitter / 110 ps / / / /
- Impulse Response
- Pulse Width / 5 ns / / / /
- Rise Time / 1.6 ns / / / /
- Dynamic Range / / / / /
Receive Detector(s)
- Type /HAMAMATSU R943-02/10-05-93 / MCP-PMT /EARLY 95/
- Quantum Efficiency / 20% / / / /
- Gain / 5x10^5 / / / /
- Bandwidth / 160-930 nm / / / /
- Jitter (single pe) / 90 ps / / / /
- Impulse Response
- Pulse Width / 7 ns / / / /
- Rise Time / 3 ns / / / /
- Dynamic Range / / / / /
Amplifier
- Type: / ORTEC VT120 / / / /
- Bandwidth: / 10 350 MHz / / / /
- Jitter: / 85 ps / / / /
- Dynamic Range / 0, -5V / / / /
TARGET IMAGING Capability
- Type of camera / CCD / / COOLED-CCD /EARLY 95/
- Diaphragm / 0.65 / / / /
- Sensitivity / 0.3 lux / / / /
Signal Processing Technique
- Type of Device /DIGITAL OSCILLOSC/ / / /
- Transmit CFD:
- Type / ORTEC 473 / / / /
- Operation Mode / NAL, SRT / / / /
- Length of External / / / / /
Delay Cable
- Bandwidth / / / / /
- Dynamic Range(pe) / / / / /
- Jitter / 85 ps / / / /
- Receive CFD:
- Type / ORTEC 584 / / / /
- Operation Mode / SRT / / / /
- Length of External / 26 cm / / / /
Delay Cable
- Bandwidth / / / / /
- Dynamic Range(pe) / / / / /
- Jitter / 85 ps / / / /
TIME OF FLIGHT MEASUREMENT
- Type / HP 5370B /09-30-87 / / /
- Clock Frequency / 10 MHz / / / /
- Number of Channels / 3 / / / /
- Number of Verniers / / / / /
- Minimum Dead Time / 165 us / / / /
- Time Resolution / 20 ps / / / /
- Aggregate Jitter / 65 ps / / / /
Amplitude Measurement / / / / /
- Type of Device /DIGITAL OSCILLOSC/ / / /
- Bandwidth / 1 Gs/s / / / /
- Accuracy / / / / /
- Part of Data Stream?/ N/A / / / /
System Delay Calibration/ YES / / / /
Internal Calibration Capability
Location of Target(s) / OPTO-COUPL. BOX / / / /
Range of Target(s) / 23 ns / / / /
External Calibration Capability
Location of Target(s) /OBSERVATORY AREA / / / /
Range(s) of Target(s) /120.073,370.487 m/ / / /
SECTION 2.6 TIMING CONFIGURATION SECTION
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TIMING / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
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Frequency Standard(s) used/ 3 CESIUMS /01-03-95 / / /
Frequencies / 1 Hz, 1 MHz / / / /
Short-Term Stability / 10E-13 /01-03-95 / / /
Long-Term Stability / 10E-13 /01-03-95 / / /
Epoch Time Measurement:
- Type of Device / SLAVE CLOCK / / / /
- Resolution / 1 us / / / /
- Timing Closure / LATCH / / / /
SECTION 2.7 METEOROLOGICAL SENSORS CONFIGURATION CATAGORY
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METEOROLOGICAL / SPECIFICATIONS / DATE / FUTURE / APPROX./
SENSORS / / / CHANGES / DATE /
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Thermometer
Type / PLATINUM RESIST. / 03-16-90 / / /
Accuracy (calibrated) / < 0.25 deg / / / /
Resolution / 0.1 deg / / / /
Range / -10 - 40 deg / / / /
Barometric Pressure System
Type / POTENZIOMETRIC / / / /
Accuracy (calibrated) / < 0.5 mB / / / /
Range / 880-1040 mB / / / /
Relative Humidity System
Type / SOLID STATE / / / /
System Accuracy / <1% (25 deg) / / / /
Resolution / 0.5% / / / /
System Range / 0-100% LINEAR / / / /
Wind Measurement System
Type / ANEMOMETER / / / /
Sensor /DC TACHOMETER GEN./ / / /
Range / 0-30 m/s / / / /
Accuracy / 2% / / / /
Resolution / 0.5% / / / /
Threshold / 0.4 m/s / / / /
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