Helwan
SLR System Configuration Definition
SYSTEM CONFIGURATION DEFINITION
===============================
SYSTEM NAME: Helwan
PAD ID NO.: 7831
ADDRESS: National Research Institute of Astronomy & Gephysics
El Marsaad Str. Helwan, EGYPT
(Faculty of Nuclear Sciences & Physical Engineering
Brehova 7, 115 19 Prague 1, The Czech Republic)
CONTACT: Prof. M.Y. Tawadros [Helwan]
Dr. A. Novotny [Prague]
PHONE: +20 2 782683 [Helwan]
+42 2 85762244 [Prague]
FAX: +20 2 782683 [Helwan]
+42 2 85762252 [Prague]
E-MAIL: NRIAG@FRCU.EUN.EG -(forwarded to Prague)
NOVOTNY@TROJA.FJFI.CVUT.CZ - Internet
74124,766 - CompuServe Novotny
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SECTION 1.0 - SYSTEM RANGING CAPABILITY
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SECTION 1.1 SYSTEM RANGING FEATURES
===================================
FEATURES /CURRENT RANGING / RANGING / DATE /FUTURE /
/CAPABILITY / PHOTOELECTRON / /RANGING /
/ / / /CAPABILITY/
===========================================================================
Calibration:
Internal / no / / / /
External / yes / 1 - 10 /05-12-94/ /
* Internal Calibration: Refers to the capability for ranging to a
target within the system.
* External Calibration: Refers to the capability for ranging to
terrestrial targets.
SECTION 1.2 ADVANCED SYSTEM RANGING FEATURES
============================================
TARGET /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTRON / / RANGING /
/ / / / CAPABILITY/
===========================================================================
Two-Color Capability/ no / /05-12-94/ yes /
Manual Track / / / / /
Tracking:
Semi-Automated / / / / /
Fully Automated / yes / 1, 1-10 /05-12-94/ /
Section 1.3 System Ranging Targets
===================================
TARGET /CURRENT RANGING / RANGING / DATE / FUTURE /
/CAPABILITY / PHOTOELECTON / / RANGING /
/ CAPABILITY/
===========================================================================
STARLETTE / yes / 1 - 10 /05-12-94/ /
STELLA / yes / 1 - 10 /05-12-94/ /
ERS-1 / yes / 1 - 10 /05-12-94/ /
AJISAI / yes / 1 - 10 /05-12-94/ /
TOPEX / yes / 1 - 10 /05-12-94/ /
LAGEOS 1 / yes / 1 /05-12-94/ /
LAGEOS 2 / yes / 1 /05-12-94/ /
ETALON 1 / no / / / yes /
ETALON 2 / no / / / yes /
GLONASS 3 / no / / / yes /
GPS-3,5 / no / / / yes /
Geosynchronous
Satellite / no / / / no /
Moon / no / / / 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 / 05-12-94 / / /
Energy / Pulse (mJ) / 50 mJ/ 05-12-94 / / /
Pulsewidth (ps) / 25 ps/ 05-12-94 / / /
Beam Size / 20 mm diam./ 01-01-95 / / /
Beam Divergence(Half Angle) 500 microrad/ 05-12-94 / / /
Beam Divergence Control / manual / 05-12-94 / / /
Amplitude Stability / 10 %/ 05-12-94 / / /
Timing Stability / -- ns/ / / /
Transverse Mode Structure / TEM00 cm/ 05-12-94 / / /
Ranging Wavelength(s) / 532 nm/ 05-12-94 / / /
Repetition Rate / 5 Hz/ 05-12-94 / / /
Other / / / / /
SECTION 2.2 MOUNT CONFIGURATION CATAGORY
========================================
SECTION 2.2.1
=============
TELESCOPE/ MOUNT / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
===========================================================================
Telescope Type / refractor / 05-12-94 / reflector /1995 /
Biaxial Telescope / yes / / yes / /
Monoaxial Telescope / --- / / / /
Mount Type / AZ EL / / AZ EL / /
Field of View / 1 arc min / / 1 arc min/ /
Focal Length / 0.8 m / / 3 m / /
Magnification / --- / / / /
Pointing Accuracy / 1 arc min / / 1 arc min/ /
After STARCAL
Satellite:
Common T/R Optical Path / / / / /
Separate T/R Optical Path / yes / 05-12-94 / yes / 95 /
Calibration:
Common T/R Optical Path / / / / /
Separate T/R Optical Path / yes / 05-12-94 / yes / 95 /
Orthogonality of Axes / / / / /
Wobble on Each Axis:
Elevation / 0.5 arcmin / 05-12-94 / 0.5 arcmin/ 95 /
Azimuth / 0.5 arcmin / 05-12-94 / 0.5 / 95 /
Elevation / -5, +90 deg / 05-12-94 / -5, +90 deg/ 95 /
- Range
- Encoder Resolution / 18 arcsec / 05-12-94 / 1 arcsec/ 95 /
- Position Jitter / 18 arcsec / / 1 arcsec/ 95 /
- Maximum EL Velocity / 0.5 deg/sec / / 4 deg/sec / 95 /
- Maximum EL Acceleration/ --- / / 1 deg/sec/sec/95 /
Azimuth / -360 / +360 / 05-12-94 / / /
- Range / / / / /
- Encoder Resolution / 18 arcsec / 05-12-94 / 1 arcsec / 95 /
- Position Jitter / 18 arcsec / / 1 arcsec / /
- Maximum Az Velocity / 1 deg/sec / / 4 deg/sec/ /
- Maximum Az Acceleration/ --- / /1 deg/sec/sec/ 95 /
PRIMARY MIRROR / / / / /
Type / lens asph. / 05-12-94 /meniscus Cas./ 95 /
Clear Aperture (CA) / 0.4 m / / 0.3 m / /
Focal Length / 0.8 m / / 3 m / /
Optical Coating / NO / / Aluminium / /
SECONDARY MIRROR / / / / /
Type / ---- / / hyperbolic / 95 /
Clear Aperture (CA) / / / 8 cm / /
Focal Length / / / / /
Optical Coating / / / Al / /
TERTIARY MIRROR / ----- / / no / /
Type / / / / /
Clear Aperture / / / / /
COUDE MIRRORS / / / / /
Type / flat / 05-12-94 / flat / 95 /
Clear Aperture / 50 mm diam. / / 50 mm / /
Optical Coating / dielectric / / dielectric/ /
SECTION 2.3 OPTICAL CONFIGURATION CATAGORY
==========================================
TRANSMIT/ RECEIVE OPTICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
===========================================================================
T/R Coupling Scheme:
- Type / N/A / / / /
- Coupling Efficiency / / / / /
Spatial Filter: / / / / /
- Field of View / / / / /
Band-Pass Filter: / / / / /
- Type / / / / /
- Bandwidth / / / / /
- Blocking Bandwidth / / / / /
-Transmission Efficiency / / / / /
Receive Signal Amplitude
Control Mechanism / / / / /
SECTION 2.4 TRANSMIT/ RECEIVE (T/R) ELECTRONICS CONFIGURATION SECTION
=====================================================================
T/R ELECTRONICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
===========================================================================
Transmit Detector:
- Quantum Efficiency / 10 % / 05-12-94 / / /
- Gain / 1 / / / /
- Bandwidth / 1 GHz / / / /
- Jitter (single pe) / 20 ps / / / /
- Impulse Response
- Pulse Width / 5 ns / 05-12-94 / / /
- Rise Time / 0.5 ns / / / /
- Dynamic Range / 2 / / / /
Receive Detector(s) / PMT RCA / 05-12-94 / SPAD / 95 /
- Quantum Efficiency / 10 % / / 20 % / /
- Gain / 1E6 / / 1E9 / /
- Bandwidth / 100 MHz / / 4 GHz / /
- Jitter (single pe) / 200 ps / / 20 ps / /
- Impulse Response / / / / /
Pulse Width/Rise Time / 3ns / / / /
- Dynamic Range / 10 / / / /
Amplifier / 2 pcs HP / / / /
- Type: / 2 pcs HP / / / /
- Bandwidth: / 400 MHz / / / /
- Jitter: / / / / /
- Dynamic Range / / / / /
TARGET IMAGING Capability / no / / yes / 95 /
- Type of camera / / / CCD-ST4 / /
- Gain / / / / /
- Sensitivity / / / M13 / /
Signal Processing Technique/ / / ST-4 / /
- Type of Device / / / / /
- CFD: / ORTEC / / ORTEC / /
- Length of External
Delay Cable 2 ns
- Bandwidth / 100 MHz / 05-12-94 / / /
- Dynamic Range(pe) / 10 / / / /
- Jitter / / / / /
EVENT TIMER or TIME OF FLIGHT MEASUREMENT? HP 5370B
- Clock Frequency / 10 MHz / 05-12-94 / / /
- Number of Channels / 1 / / / /
- Number of Verniers / 2 / / / /
- Minimum Dead Time / - / / / /
- Time Resolution / 10 ps / / / /
- Aggregate Jitter / 25 ps / / / /
Amplitude Measurement / no / / / /
- Type of Device / / / / /
- Bandwidth / / / / /
- Accuracy / / / / /
- Part of Data Stream? / / / / /
System Delay Calibration / yes / 05-12-94 / / /
Internal Calibration Capability no
Location of Target(s) / / / / /
Range of Target(s) / / / / /
External Calibration Capability
Location of Target(s) / dome / 05-12-94 / / /
Range(s) of Target(s) / 1 m / / / /
SECTION 2.6 TIMING CONFIGURATION SECTION
========================================
TIMING / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
===========================================================================
Frequency Standard(s) used/ quartz * / 05-12-94 / / /
Frequencies / / / / /
Short-Term Stability / 1E-10 / / / /
Long-Term Stability / / / / /
Epoch Time Measurement: / / / / /
- Type of Device / own / 05-12-94 / / /
- Resolution / 100 ns / / / /
- Timing Closure / / / / /
* controlled via GPS
SECTION 2.7 METEOROLOGICAL SENSORS CONFIGURATION CATAGORY
=========================================================
METEOROLOGICAL SENSORS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
===========================================================================
Thermometer / yes / 05-12-94 / / /
Type / mercury / / / /
Accuracy (calibrated) / 1 deg / / / /
Resolution / 1 deg / / / /
Range / -20 +50 / / / /
Barometric Pressure System/ yes / 05-12-94 / / /
Type / aneroid / / / /
Accuracy (calibrated) / 1 mbar / / / /
Range / / / / /
Relative Humidity System / yes / 05-12-94 / / /
Type / hair / / / /
System Accuracy / 10 % / / / /
Resolution / 10 % / / / /
System Range / 0 - 100 % / / / /
Wind Measurement System / no / / / /
Type / / / / /
Type: / / / / /
Sensor / / / / /
Range / / / / /
Accuracy / / / / /
Resolution / / / / /
Threshold / / / / /
SECTION 4.0 SURVEY MEASUREMENT CONFIGURATION / CAPABILITY
=========================================================
SECTION 4.1 SURVEY MEASUREMENTS
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SURVEYING INSTRUMENT / ACCURACY / PRECISION
===========================================================================
N/A / /
/ /
/ /
SECTION 4.2 SURVEY ANALYSIS
===========================
SURVEY ANALYSIS TECHNIQUE
===========================================================================
* (PLEASE GIVE DESCRIPTION OF THE TECHNIQUE USED)
* N/A
*
SECTION 4.3 SURVEY CALIBRATION TARGET
=====================================
TARGET / TYPE / RANGE / AZ / EL / RANGE / RANGE / SHORT / LONG
/ / ACCURACY/ / / PRECISION / / TERM / TERM
N/A / / / / / / / STABILITY / STABILITY
===========================================================================
1 / / / / / / / /
2 / / / / / / / /
3 / / / / / / / /
4 / / / / / / / /
SECTION 4.4 ECCENTRICITY DETERMINATION
======================================
/ NORTH / EAST / UP
===========================================================================
Mean Value / 0 / 0 /
Accuracy / 1 mm / 1 mm /
Precision / 0 / 0 /
Short Term Stability / 0 / 0 /
Long Term Stability / 0 / 0 /
SECTION 5.0 CALIBRATION TECHNIQUE / CAPABILITY
==============================================
SECTION 5.1 CALIBRATION DEVICES AND FREQUENCY
=============================================
===========================================================================
// FREQUENCY
===========================================================================
DEVICE/ FEATURE / SATELLITE / PASS / DAY / MONTH /
YEAR
===========================================================================
Event Timer / custum built / / / /
Time of Flight Devices / HP 5370B / / / /
Discriminator / ORTEC 473 / / / /
Pressure Sensor / Aneroid / / / /
Temperature Sensor / Mercury / / / /
Timing System / / / / /
System Delay / / 1 / / /
SECTION 6.0 SYSTEM TIMING CLOSURE CONFIGURATION
===============================================
SECTION 6.1 TIMING CLOSURE
===========================
Reference Time: GPS - UTC
Accuracy of Timing: 100 ns
Modeling of Time Drift: None
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 /
7.1.3 Timing No /
7.1.4 Instrument Non-Linearities No /
7.1.5 Geometric Corrections No /
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 /
SECTION 7.3 DATA ANALYSIS TECHNIQUES / CAPABILITIES
===================================================
7.3.1 Normal Point Computation: Yes
7.3.2 Fitting Routine (Algorithms): Yes, Orbital Fitting
7.3.3 Noise Filtering and Editing Procedures: Yes, 2 sigma
7.3.4 Data Quality Control Procedures: Yes
7.3.5 System Computational Capability: See above
SECTION 8.0 SYSTEM ATMOSPHERIC TECHNIQUES
==========================================
SECTION 8.1 ATMOSPHERIC MODEL
=============================
8.1 Atmospheric Model Used: Marini Murray (1977) for orbit modelling
no correction applied to the data
Prague January 10, 1995
* ( 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 mm / 5 mm / 10 mm / 1993 /
Wavefront Distortion / 1 mm / -- / 1 mm / /
Signal Strength Dependence / -- / / / /
Calibration Path / 2 mm / 1 mm / 2 mm / /
Mount Eccentricities / 1 mm / -- / -- / /
Meteorological Measurement / N/A / / / /
Event Timer / 100 ns / 100 ns / 200 ns / /
Time of Flight Measurement / 50 ps / 50 ps / 50 ps / /
Epoch Time Measurement / GPS / / / /
Data Analysis / ? / / / /
Normal Point Computation / ? / / / /
System Delay Computation / ? / / / /
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