MOBLAS-4 SLR System Configuration Definition
SYSTEM CONFIGURATION DEFINITION
===============================
The information documented in this file is based upon the MOBLAS 7.
The similarities between MOBLAS 4, 5, 7, 8 configurations are such that
this characterization, minus the target and range distances, will satisfy
the MOBLAS system characterizations. Future updates to this database will
individually specify the station configurations to include information
such as specific target distances.
SYSTEM NAME: MOBLAS 7
PAD ID#: 7105
ADDRESS: Goddard Geophysical Astronomical Observatory
CONTACT: Thomas Varghese
PHONE: (301)-805-3996
FAX: (301)-805-3974
E-MAIL: lnetv@cdslr1.atsc.allied.com
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SECTION 1.0 - SYSTEM RANGING CAPABILITY
=======================================
SECTION 1.1 SYSTEM RANGING FEATURES
===================================
FEATURES /CURRENT RANGING / DATE / FUTURE / APPROX. /
/CAPABILITY / / RANGING / DATE /
/ CAPABILITY/ /
===============================================================================
Calibration:
Internal / no / 5-94 / / /
External / yes: surveyed / 5-94 / / /
/ cube corner / / / /
External Range / 223.3922m / 5-94 / / /
Primary Target
* 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
============================================
FEATURES /CURRENT RANGING / DATE / FUTURE / APPROX. /
/CAPABILITY / / RANGING / DATE /
/ / CAPABILITY/ /
===============================================================================
Two-Color Capability/ no / 5-94 / / /
Manual Track / yes / 5-94 / / /
Tracking:
Semi-Automated / no / 5-94 / / /
Fully Automated / no / 5-94 / / /
Section 1.3 System Ranging Targets
===================================
FEATURES /CURRENT RANGING / DATE / FUTURE / APPROX. /
/CAPABILITY / / RANGING / DATE /
/ CAPABILITY/ /
==============================================================================
BE-3 / N/A / 5-94 / / /
GEOS-3 / YES / 5-94 / / /
STARLETTE / YES / 5-94 / / /
STELLA / YES / 5-94 / / /
ERS-1 / YES / 5-94 / / /
AJISAI / YES / 5-94 / / /
TOPEX/ POSEIDON / YES / 5-94 / / /
LAGEOS 1 / YES / 5-94 / / /
LAGEOS 2 / YES / 5-94 / / /
ETALON 1 / YES / 5-94 / / /
ETALON 2 / YES / 5-94 / / /
GLONASS 40 / YES / 5-94 / / /
GLONASS 44 / YES / 5-94 / / /
GLONASS 47 / YES / 5-94 / / /
GLONASS 53 / YES / 5-94 / / /
GLONASS 56 / YES / 5-94 / / /
GPS-35/LRE-1 / YES / 5-94 / / /
GPS 36/LRE-2 / YES / 5-94 / / /
Geosynchronous / YES / 5-94 / / /
MST-2 / YES / 5-94 / / /
METEOR 3-07/PRARE / YES / 5-94 / / /
METEOR 2-21 / YES / 5-94 / / /
SECTION 2.0 - HARDWARE CONFIGURATION / CAPABILITY
=================================================
SECTION 2.1 LASER CONFIGURATION CATAGORY
========================================
LASER / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Type of Laser Medium / Nd: YAG / 5-94 / / /
Energy / Pulse (mJ) / 100 mJ/ 5-94 / / /
Pulsewidth (ps) / 200 ps/ 5-94 / / /
Beam Size- (final) / 93 mm/ 5-94 / / /
Beam Divergence(Half Angle) .735 microrad/ 5-94 / / /
Beam Divergence Control / none / 5-94 / / /
Amplitude Stability / 5% rms/ 5-94 / / /
Timing Stability / 5 micros/ 5-94 / / /
Transverse Mode Structure / TEM 00 / 5-94 / / /
Ranging Wavelength(s) / 532 nm/ 5-94 / / /
Repetition Rate / 1, 5, 10 Hz/ 5-94 / / /
Other / / / / /
SECTION 2.2 MOUNT CONFIGURATION CATAGORY
========================================
SECTION 2.2.1
=============
TELESCOPE/ MOUNT / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Telescope Type / Cassegrain / 5-94 / / /
Biaxial Telescope / Biaxial / 5-94 / / /
Monoaxial Telescope / No / 5-94 / / /
Mount Type / AZ-EL / 5-94 / / /
Field of View / 100 mdeg/ 5-94 / / /
Focal Length / 381 cm/ 5-94 / / /
Magnification / N/A / 5-94 / / /
Pointing Accuracy / 1 mdeg / 5-94 / / /
After STARCAL
Satellite:
Common T/R Optical Path / NO / 5-94 / / /
Separate T/R Optical Path / YES / 5-94 / / /
Calibration:
Common T/R Optical Path / NO / 5-94 / / /
Separate T/R Optical Path / YES / 5-94 / / /
Orthogonality of Axes / <2 arcsec / 5-94 / / /
Wobble on Each Axis:
Elevation / 1 arcsec rms/ / / /
Azimuth / 1 arcsec rms/ / / /
Elevation
- Range / +/- 100 deg/ 5-94 /
- Encoder Resolution / 1.71661377E-4 deg/ 5-94 / / /
- Position Jitter / 2 arcsec rms/ 5-94 / / /
- Maximum EL Velocity / 5 deg/sec/ 5-94 / / /
- Maximum EL Acceleration/ 3 deg/sec/sec/ 5-94 / / /
Azimuth
- Range / unlimited / 5-94 / / /
- Encoder Resolution / 1.71661377E-4 deg/ 5-94 / / /
- Position Jitter / 2 arcsec rms/ 5-94 / / /
- Maximum Az Velocity / 20 deg/sec/ 5-94 / / /
- Maximum Az Acceleration/ 5 deg/sec/sec/ 5-94 / / /
PRIMARY MIRROR / / 5-94 / / /
Type / parabolic / 5-94 / / /
Clear Aperture (CA) / 76.2 cm/ 5-94 / / /
Focal Length / 114.3 cm virtual/ 5-94 / / /
Optical Coating / aluminum / 5-94 / / /
SECONDARY MIRROR
Type / hyperbolic / 5-94 / / /
Clear Aperture (CA) / 23.87 cm/ 5-94 / / /
Focal Length / 50.8 cm/ 5-94 / / /
Optical Coating / aluminum / 5-94 / / /
TERTIARY MIRROR
Type / N/A / 5-94 / / /
Clear Aperture / N/A / 5-94 / / /
Focal Length / N/A / 5-94 / / /
Optical Coating / N/A / 5-94 / / /
COUDE MIRRORS
Type / flat / 5-94 / / /
Clear Aperture / 6 inch diameter/ 5-94 / / /
Optical Coating /dielectric @532 nm/ 5-94 / / /
SECTION 2.3 OPTICAL CONFIGURATION CATAGORY
==========================================
TRANSMIT/ RECEIVE OPTICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
T/R Coupling Scheme:
- Type / seperate / 5-94 / / /
- Coupling Efficiency / 90% / 5-94 / / /
Spatial Filter: / YES / 5-94 / / /
- Field of View / .05 - 1.0 mrad/ 5-94 / / /
Band-Pass Filter: / YES / 5-94 / / /
- Type / interference / 5-94 / / /
- Bandwidth / 10 angstrom / 5-94 / / /
- Blocking Bandwidth / x-ray to uv / 5-94 / / /
-Transmission Efficiency / 76% / 5-94 / / /
Receive Signal Amplitude
Control Mechanism /0-6 gradient nd wheel/5-94 / / /
SECTION 2.4 TRANSMIT/ RECEIVE (T/R) ELECTRONICS CONFIGURATION SECTION
=====================================================================
T/R ELECTRONICS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Transmit Detector: /Optoelectronics PD1/ 5-94 / / /
- Quantum Efficiency / 30% / 5-94 / / /
- Gain / none / 5-94 / / /
- Bandwidth / 4 GHz / 5-94 / / /
- Jitter (single pe) / N/A / 5-94 / / /
- Impulse Response/Rise Time/ 175ps/90ps / 5-94 / / /
- Dynamic Range / 5.- uW to 6.7 mW/ 5-94 / / /
Receive Detector(s) / MCP-PMT / 5-94 / / /
- Quantum Efficiency / 17.70% / 5-94 / / /
- Gain / 1E6 / 5-94 / / /
- Bandwidth / 1 GHz / 5-94 / / /
- Jitter (single pe) / 100 ps / 5-94 / / /
- Impulse Response/Rise Time/ 550ps/ 350ps / 5-94 / / /
- Dynamic Range / 4-40 pe / 5-94 / / /
Amplifier / N/A / 5-94 / / /
- Type: / N/A / 5-94 / / /
- Bandwidth: / N/A / 5-94 / / /
- Jitter: / N/A / 5-94 / / /
- Dynamic Range / N/A / 5-94 / / /
Target Imaging Capability
- Type of camera / CCD / 5-94 / / /
- Gain / N/A / 5-94 / / /
- Sensitivity / .06 lux/ 5-94 / / /
Signal Processing Technique
- Type of Device / CFD / 5-94 / / /
- CFD:
- Length of External / 14.0 cm/ 5-94 / / /
Delay Cable
- Bandwidth / 200 MHz/ 5-94 / / /
- Dynamic Range(pe) / 4-40 pe/ 5-94 / / /
- Jitter / 20 ps/ 5-94 / / /
EVENT TIMER or
TIME OF FLIGHT MEASUREMENT / Time of Flight / 5-94 / / /
- Clock Frequency / 5 MHz / 5-94 / / /
- Number of Channels /2 (1 start,1 stop)/ 5-94 / / /
- Number of Verniers / 1 / 5-94 / / /
- Minimum Dead Time /5 usec over databus
.33 usec internally/ 5-94 / / /
- Time Resolution / 20 ps/ 5-94 / / /
- Aggregate Jitter / 35 ps/ 5-94 / / /
Amplitude Measurement
- Type of Device /Lecroy integrator/ 5-94 / / /
- Bandwidth / 250 MHz/ 5-94 / / /
- Accuracy / N/A / 5-94 / / /
- Part of Data Stream? / yes/via Lecroy / 5-94 / / /
System Delay Calibration / / 5-94 / / /
Internal Calibration Capability
Location of Target(s) / / / / /
Range of Target(s) / / / / /
External Calibration Capability
Location of Target(s) / / / / /
Range(s) of Target(s) / / / / /
SECTION 2.5 TIMING CONFIGURATION SECTION
========================================
TIMING / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Frequency Standard(s) used/ cesium beam / 5-94 / / /
Frequencies / 5 MHz / 5-94 / / /
Short-Term Stability / 5.6 E-11 / 5-94 / / /
Long-Term Stability / 5.0 E-12 / 5-94 / / /
Epoch Time Measurement:
- Type of Device /logic circuit in / 5-94 / / /
ranging electronics/ / / /
- Resolution / 200 ns/ 5-94 / / /
- Timing Closure / YES / 5-94 / / /
SECTION 2.7 METEOROLOGICAL SENSORS CONFIGURATION CATAGORY
=========================================================
METEOROLOGICAL SENSORS / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Thermometer
Type /sling psychrometer/ 5-94 / / /
Accuracy (calibrated) / 1 deg/ 5-94 / / /
Resolution / 1 deg/ 5-94 / / /
Range / +/- 1 deg/ 5-94 / / /
Barometric Pressure System
Type / Paroscientific / 5-94 / / /
Accuracy (calibrated) / .01 mb/ 5-94 / / /
Resolution / .1 mb/ 5-94 / / /
Range / 0-2000 psia/ 5-94 / / /
Relative Humidity System
Type /sling psychrometer/ 5-94 / / /
System Accuracy / 10% / 5-94 / / /
Resolution / 10% / 5-94 / / /
System Range / 0 to 100% / 5-94 / / /
Wind Measurement System
Type / N/A / 5-94 / / /
Type: / N/A / 5-94 / / /
Sensor / N/A / 5-94 / / /
Range / N/A / 5-94 / / /
Accuracy / N/A / 5-94 / / /
Resolution / N/A / 5-94 / / /
Threshold / N/A / 5-94 / / /
SECTION 3.0 SOFTWARE SYSTEM CONFIGURATION/ CAPABILITY
=====================================================
SECTION 4.0 SURVEY MEASUREMENT CONFIGURATION / CAPABILITY
=========================================================
SECTION 4.1 SURVEY MEASUREMENTS
===============================
SURVEYING INSTRUMENT / ACCURACY : PRECISION / DATE / FUTURE / APPROX. /
/ / / CHANGES / DATE /
============================================================================
Wild DT2 Distomat / 1 mm: +/- .3mm / 5-94 / / /
Wild DT22 Distomat / 1 mm: +/- .3mm / 5-94 / / /
Wild NA2 Level / 1.5 mm/kilometer / 5-94 / / /
Wild Optical Plummet / .5 mm / 5-94 / / /
SECTION 4.2 SURVEY ANALYSIS
===========================
SURVEY ANALYSIS TECHNIQUE / PLEASE DESCRIBE TECHNIQUE / DATE
================================================================================
NGS Haveago Analysis / Network Solutions of Monuments / 5-94
SECTION 4.3 SURVEY CALIBRATION TARGET
=====================================
TARGET / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
TARGET A
Type / cube corner / 5-94 / / /
Range Accuracy / +/- .0002 m/ 5-94 / / /
Azimuth / 64.941 m/ 5-94 / / /
Elevation / -3.1308 m/ 5-94 / / /
Range Precision / +/- .0004 m/ 5-94 / / /
Range / 106.6727 m/ 5-94 / / /
Short Term Stability / 2 to 3 mm/ 5-94 / / /
Long Term Stability / 2 to 3 mm/ 5-94 / / /
TARGET B
Type / cube corner / 5-94 / / /
Range Accuracy / +/- .0002 m/ 5-94 / / /
Azimuth / 89.4339 m/ 5-94 / / /
Elevation / -1.5235 m/ 5-94 / / /
Range Precision / +/- .0004 m/ 5-94 / / /
Range / 223.3922 m/ 5-94 / / /
Short Term Stability / 2 to 3 mm/ 5-94 / / /
Long Term Stability / 2 to 3 mm/ 5-94 / / /
TARGET C
Type / cube corner / 5-94 / / /
Range Accuracy / +/- .0002 m/ 5-94 / / /
Azimuth / 105.011 m/ 5-94 / / /
Elevation / -1.6583 m/ 5-94 / / /
Range Precision / +/- .0004 m/ 5-94 / / /
Range / 170.5272 m/ 5-94 / / /
Short Term Stability / 2 to 3 mm/ 5-94 / / /
Long Term Stability / 2 to 3 mm/ 5-94 / / /
SECTION 4.4 ECCENTRICITY DETERMINATION
======================================
ECCENTRICITY / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
MEAN VALUE
North / -.011 m/ 5-94 / / /
East / -.030 m/ 5-94 / / /
Up / -3.138 m/ 5-94 / / /
Precision
North / +/- 1 mm/ 5-94 / / /
East / +/- 1 mm/ 5-94 / / /
Up / +/- 1 mm/ 5-94 / / /
Short Term Stability
North / <1 mm/ 5-94 / / /
East / <1 mm/ 5-94 / / /
Up / <1 mm/ 5-94 / / /
Long Term Stability
North / 1 mm/ 5-94 / / /
East / 1 mm/ 5-94 / / /
Up / 1 mm/ 5-94 / / /
SECTION 5.0 CALIBRATION TECHNIQUE / CAPABILITY
==============================================
SECTION 5.1 CALIBRATION DEVICES AND FREQUENCY
=============================================
DEVICE/ FEATURE / FREQUENCY of CALIBRATION / DATE / FUTURE/ APPR.
/ / /CHANGES/ DATE
===============================================================================
Event Timer / N/A / 5-94 / /
Time of Flight Devices/when data shows an anomoly / 5-94 / /
Discriminator /when data shows an anomoly / 5-94 / /
Pressure Sensor / once a year / 5-94 / /
Temperature Sensor / once a year / 5-94 / /
Timing System /when data shows an anomoly / 5-94 / /
System Delay / minimum once an hour / 5-94 / /
SECTION 6.0 SYSTEM TIMING CLOSURE CONFIGURATION
===============================================
SECTION 6.1 TIMING CLOSURE
===========================
TIMING FEATURE / SPECIFICATIONS / DATE / FUTURE / APPROX./
/ / / CHANGES / DATE /
================================================================================
Reference Time / Cesium beam / 5-94 / / /
Accuracy of Timing / 1.00E-12 / 5-94 / / /
Modeling of Time Drift / daily / 5-94 / / /
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: YES /
7.1.2 Receive Signal Amplitudes: YES /
7.1.3 Timing YES /
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: an average applied from pre
and post calibrations
SECTION 7.3 DATA ANALYSIS TECHNIQUES / CAPABILITIES
===================================================
7.3.1 Normal Point Computation: YES: on site computer calculates
7.3.2 Fitting Routine (Algorithms): YES: IRV is used to provide an apriori
range for calculating time of flight
7.3.3 Noise Filtering and Editing Procedures: YES: 3 sigma, poisson if very
noisy
7.3.4 Data Quality Control Procedures: YES: after filtering& fitting rms
is flagged, checked
7.3.5 System Computational Capability: YES: on site computer calculates
rms and system delay
SECTION 8.0 SYSTEM ATMOSPHERIC TECHNIQUES
==========================================
SECTION 8.1 ATMOSPHERIC MODEL
=============================
8.1 Atmospheric Model Used:
* ( PLEASE DESCRIBE THE MODEL IN AS MUCH DETAIL AS POSSIBLE )
Marini Murray Model : Standard atmospheric refraction model
SECTION 9.0 SYSTEM PERFORMANCE CHARACTERISTICS
================================================
SECTION 9.1 RANGING SYSTEM ERRORS
=================================
RANGING SYSTEM ERRORS / ACCURACY / 1 SIGMA / PEAK - PEAK / DATE /
================================================================================
Temporal Stability / 3 mm/ 4-5 mm/ 12 m/ 5-94 /
Wavefront Distortion / N/A / N/A / N/A / 5-94 /
Signal Strength Dependence / 2-3 mm/ 4 mm/ 8 m/ 5-94 /
Calibration Path / 3 mm/ 4 mm/ N/A / 5-94 /
Mount Eccentricities
North / .001 m/ .0015 m/ .0015 m/ 5-94 /
East / .001 m/ .0015 m/ .0015 m/ 5-94 /
Up / .001 m/ .0015 m/ .0015 m/ 5-94 /
Meteorological Measurement
Temperature / 1 deg/ 2 deg/ 2 deg/ 5-94 /
Pressure / .01 mb/ .02 mb/ .02 mb/ 5-94 /
Event Timer / N/A / N/A / N/A / 5-94 /
Time of Flight Measurement / 20-30 ps/ 4 mm/ +/-10 mm/ 5-94 /
Epoch Time Measurement / 500 ns/ +/-200 ps/ +/-200 ps/ 5-94 /
Normal Point Computation / 1 mm/ 1 mm/ N/A / 5-94 /
System Delay Computation / 1 mm/ 4 mm/ N/A / 5-94 /
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