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Helwan: Site Log
Instructions and Update Site Log
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Section: 0. Form
Section: 1. Identification of the Ranging System Reference Point (SRP)
Section: 2. Site Location Information
Section: 3. General System Information
Section: 4. Telescope Information
Section: 5. Laser System Information
Section: 6. Receiver System
Section: 7. Tracking Capabilities
Section: 8. Calibration
Section: 9. Time and Frequency Standards
Section: 10. Preprocessing Information
Section: 11. Aircraft Detection
Section: 12. Meteorological Instrumentation
Section: 13. Local Ties, Eccentricities, and Collocation Information
Section: 14. Local Events Possibly Affecting Computed Position
Section: 15. On-Site, Point of Contact Agency Information
Section: 16. Responsible Agency (if different from 15.)
Section: 17. More Information
ILRS Site and System Information Form
International Laser Ranging Service
0. Form
Prepared by (Full Name) : Dr. Makram Ibrahim
Preparer E-mail : makram@nriag.sci.eg,
: makikh@yahoo.com
Date Prepared : 2016-07-27
Report Type : UPDATE
Site Log Format Version : 2.0
Site Log Revision :
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1. Identification of the Ranging System Reference Point (SRP)
Site Name : Helwan SLR
IERS DOMES Number : 30101S001
CDP Pad ID : 7831
Subnetwork : EUROLAS
Description : AZ EL INTERSECT
Monument Description : N.A.
Monument Inscription : N.A.
Mark Description : N.A.
Date Installed : 1983-05-01
Date Removed :
Geologic Characteristic : Sandstone
Additional Information : The system is operated in annual
: Campaigns in cooperation with the Czech
: Technical University in Prague
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2. Site Location Information
City or Town : Helwan - Cairo
State or Province : N.A.
Country : Egypt
Tectonic Plate : Africa
Local Time (UTC +/- hours) :
Approximate Position
X coordinate [m]: 4728297
Y coordinate [m]: 2879661
Z coordinate [m]: 3156862
Latitude [deg]: 29.8590 N
Longitude [deg]: 31.3427 E
Elevation [m]: 145.46
Survey Method :
Date Measured :
Additional Information :
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3. General System Information
3.01 System Name : HELLAS
4-Character Code : HLWL
CDP System Number : 46
CDP Occupation Number : 01
Eccentricity to SRP (if Not Identical With SRP)
North [m]:
East [m]:
Up [m]:
Date Measured :
Date Installed : 1983-05-01
Date Removed :
Additional Information : (a new Laser Radar Control(LRC) will be
: installed at the Helwan SLR-STation.
: This will keep the station in better
: effeciency)
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4. Telescope Information
4.01 Receiving Telescope Type : Keplarian
Aperture [m]: 0.4
Mount : AZ-EL
Date Installed :
Date Removed :
Xmitting Telescope Type : Gallieleo type, refracting
Aperture [m]: 0.38
Date Installed :
Date Removed :
Tracking Camera Type : NONE
Model :
Manufacturer :
Field of View [deg]:
Minimum Magnitude [mag]:
Date Installed :
Date Removed :
Transmit/Receive Path : SEPARATE
Transmit/Receive Switch : NONE
Max Slew Rate Az [deg/s]: 2
Max Slew Rate El [deg/s]: 2
Max Used Tracking Rate Az : 2
Max Used Tracking Rate El : 2
Telescope Shelter : ROLL-BACK ROOF
Daylight Filter Type : NONE
Dayl. Filt. Bandwidth [nm]:
Adjustable Attenuation : NO
Adjustable Field of View :
Transmit Efficiency : 0.9
Receive Efficiency : 0.8
Date Installed : 1983-05-01
Date Removed :
Additional Information : Receiving telescope has two positive
: lenses with a pinhole to focus.
: The beam expanding telescope is of
: Gallieleo type, refracting, antireflection
: coated. The beam is directed by the mount
: (flat) mirrors in a Coude path. The Coude
: path is used for transmitting only.
: Transmit Efficiency: ~0.9
: Receive Efficiency: ~0.8
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5. Laser System Information
5.01 Laser Type : ND:YAG
Model :
Manufacturer :
Number of Amplifiers : 3
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: N.A.
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 80
Xmit Energy Adjustable : YES
Additional Information :
Pulse Width (FWHM) [ps]: 20
Max. Repetition Rate [Hz]: 5
Fullw. Beam Divergence ["]: 60 - 180
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.25
Eyesafe : NO
Eyesafe Standard :
Polarization on Exit :
Laser Fire Control :
Laser Energy Monitor :
Start Diode Type :
Manufactorer :
Model :
Quantum Efficiency [%]:
Rise/Fall Time [ps]:
Date Installed :
Date Removed :
Signal Processing :
Manufacturer :
Model :
Date Installed :
Date Removed :
Additional Information :
Date Installed : 1983-05-01
Date Removed :
Additional Information : The laser beam is expanded at the laser
: bench to its final diameter/divergence of
: 25 mm, adjustable 0.5-3 arcminutes.
: Primary Maximum Energy: not used for ranging
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : PMT
Manufacturer : Hamamatsu
Model : H 6533
Quantum Efficiency [%]: 10
Nominal Gain : 5700000
Rise Time [ps]: 700
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 120
Date Installed : 1998-05-15
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 1998-05-15
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single to Multi Photons
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 1999-05-15
Date Removed :
Additional Information :
6.02.01 Secondary Chain
Wavelength [nm]:
Detector Type :
Manufacturer :
Model :
Quantum Efficiency [%]:
Nominal Gain :
Rise Time [ps]:
Jitter (Single PE)[ps]:
Field of View Diam ["]:
Date Installed :
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing :
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement :
Return-Rate Controlled:
Mode of Operation :
Additional Information:
Time of Flight Observ. :
Manufacturer :
Model :
Resolution [ps]:
Precision [ps]:
Date Installed :
Date Removed :
Additional Information :
6.03.01 Tertiary Chain
Wavelength [nm]:
Detector Type :
Manufacturer :
Model :
Quantum Efficiency [%]:
Nominal Gain :
Rise Time [ps]:
Jitter (Single PE)[ps]:
Field of View Diam ["]:
Date Installed :
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing :
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement :
Return-Rate Controlled:
Mode of Operation :
Additional Information:
Time of Flight Observ. :
Manufacturer :
Model :
Resolution [ps]:
Precision [ps]:
Date Installed :
Date Removed :
Additional Information :
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7. Tracking Capabilities
7.01 Satellites
Very Low Alt (<400 km) : NIGHT
Low Altitude (400-2000) : NIGHT
LAGEOS/LARES : NIGHT
GLONASS : NO
Etalon : NO
GNSS : NO
Geosynchronous :
Moon : NO
Ave. Pass Switch Time [s]:
Average values for LAGEOS
Single Shot RMS [mm]: 18
# of Obs per NP :
Use of Semi-trains : YES
# of Semi-train Tracks : 3
Range Gate Width [ns]: 4
Beam Pointing Accuracy ["]: 60
Angle Encoder Resolution["]: 4
Min. Tracking Elev. [deg]: 28
Laser Polarization @emitter:
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 10
Staff per Shift : 2
System Shared With : NOTHING
Time Allocated to SLR [%]: 100
Remotely Controllable : NO
Tracking Restrictions
Go/No-go flag :
Satellite Verification :
Date Verified :
Maximum elevation :
Satellite Verification :
Date Verified :
Pass segments :
Satellite Verification :
Date Verified :
Schedule segments :
Satellite Verification :
Date Verified :
Maximum laser power limit:
Satellite Verification :
Date Verified :
Date First Applicable : 1983-05-01 HH:MM UT
Date Last Applicable :
Additional Information : The observations are carried out for all
: satellites except above 10000 km
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8. Calibration
8.01 Calibration Type : PRE or POST
Target Location : EXTERNAL
Target Type : see additional information
Target Structure : see additional information
Number of Targets :
Target Distance(s) [m]: 1.01
Date Measured : 1999-11-13
Accuracy [mm]: 5
Verification :
Return-Rate Controlled : YES
Eye-Safe Method :
Additional Information :
Mode of Operation : FEW PHOTON
Calibration performed :
Single Shot RMS [mm]: 7
Edit Criterion 1st Chain : ITERATIVE 3.0 SIGMA
Edit Criterion 2nd Chain : ITERATIVE 2.5 SIGMA
Application of Cal Data : LINEAR FIT
Date Installed : 1998-05-15
Date Removed :
Additional Information : Pre/Post pass calibration to external
: target; ranging to effective distance
: 1.01 m, with 100 echos. Flags regularly
: in MERIT II format.
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : Oven Controlled Crystal Oscillator
Model : 58503B
Manufacturer : HP
Short Term Stab. [e-12]: 5
Long Term Stab. [e-12]: 1
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]:
Date Installed : 1999-11-13
Date Removed :
Additional Information :
9.02.01 GNSS Timing Rcvr Model : 58503B
Manufacturer : HP
Date Installed : 1999-11-13
Date Removed :
Additional Information :
9.03.01 One-way System Calibration
Date performed :
Direction Calibrated :
Additional Information :
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10. Preprocessing Information
10.01 On-site NP Generation : YES
Data Screening : IRV+POLYNOMIAL
Return-Rate Rejection :
Edit Criterion 1st Chain : ITERATIVE 3.0 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : DAILY
Date First Applicable :
Date Last Applicable :
Additional Information :
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11. Aircraft Detection
11.01 Detection Type : MOUNT OBSERVER
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed :
Date Removed :
Additional Information :
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : DIGIQUARTZ MET3
Manufacturer : Paroscientific
Recording Interval : every 10 seconds
Accuracy [mbar]: 0.1
Height Diff to SRP [m]: 1.2
Distance from SRP [m]:
Date Installed : 1999-11-13 HH:MM UT
Calibration Interval : every few years
Date Removed :
Additional Information :
12.02.01 Temp Sensor Model : Platinum Resistance Temperature Probe
Manufacturer : Paroscientific
Recording Interval : every 10 seconds
Accuracy [deg C]: <=0.5
Date Installed : 1999-11-15 HH:MM UT
Calibration Interval : every few years
Date Removed :
Additional Information :
12.03.01 Humidity Sensor Model : Capacitance Probe
Manufacturer : Paroscientific
Recording Interval : every 10 seconds
Accuracy [% rel h]: 2 at 25 deg C
Date Installed : 1999-11-15 HH:MM UT
Calibration Interval : every few years
Date Removed :
Additional Information :
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13. Local Ties, Eccentricities, and Collocation Information
13.01 Collocated Permanent Geodetic Systems
13.01.01.01 GNSS : NO
Date Installed :
Date Removed :
Additional Info :
13.01.02.01 DORIS : NO
Date Installed :
Date Removed :
Additional Info :
13.01.03.01 PRARE : NO
Date Installed :
Date Removed :
Additional Info :
13.01.04.01 VLBI : NO
Date Installed :
Date Removed :
Additional Info :
13.01.05.01 Gravimeter : NO
Date Installed :
Date Removed :
Additional Info :
13.01.06.01 Other SLR :
Date Installed :
Date Removed :
Additional Info :
13.02.01.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name :
Instrumentation Type :
Instrumentation Status :
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]:
dy [m]:
dz [m]:
Date Measured :
Determined by :
Date Installed :
Date Removed :
Additional Information :
13.03.01.01 Eccentricities Between Other Monuments on Site
From: Monument Name :
DOMES Number :
CDP Number :
To: Monument Name :
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]:
dy [m]:
dz [m]:
Date Measured :
Determined by :
Additional Information :
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14. Local Events Possibly Affecting Computed Position
14.01 Date :
Event :
Additional Information :
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15. On-Site, Point of Contact Agency Information
Agency : NRIAG
Mailing Address : National Research Institute of Astronomy
: and Geophysics, 11421, Elmarsed St.,
: Helwan, Cairo, Egypt.
Website :
Primary Contact
Contact Name : Dr. Makram Ibrahim
Telephone (primary) : +201005799722
Telephone (secondary) :
Fax : +20 2 25548020
E-mail : makram@nriag.sci.eg, makikh@yahoo.com
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Tertiary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information :
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16. Responsible Agency (if different from 15.)
Agency : Czech Technical University
Mailing Address : Faculty of Nuclear Sciences and
: Physical Engineering
: Brehova 7
: 115 19 Prague 1
: Czech Republic
Primary Contact
Contact Name : Dr. Josef Blazej
Telephone (primary) : +420 224 358 659
Telephone (secondary) :
Fax : +420 2 83072252
E-mail : blazej@fjfi.cvut.cz
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information :
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17. More Information
URL for More Information : N.A.
Hardcopy on File
Site Map : NO
Site Diagram : NO
Horizon Mask : NO
Monument Description : NO
Site Pictures : NO
Additional Information :
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