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Herstmonceux: 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) : Robert Sherwood
Preparer E-mail : rshe@nerc.ac.uk
Date Prepared : 2024-04-04
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 : Herstmonceux
IERS DOMES Number : 13212S001
CDP Pad ID : 7840
Subnetwork : EUROLAS
Description : AZ EL INTERSECT
Monument Description : N.A.
Monument Inscription : N.A.
Mark Description : N.A.
Date Installed : 1982-01-01
Date Removed :
Geologic Characteristic : CLAYS/SANDSTONES
Additional Information : Local geology: The site is bounded to the
: south by old, but now drained, marshland
: with the English Channel about 6 km away.
: The underlying structure is interbedded
: clays and sandstones called the Hastings
: Beds. There is no history of seismic
: activity in the area.
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2. Site Location Information
City or Town : Hailsham
State or Province : East Sussex
Country : UK
Tectonic Plate : Eurasian
Local Time (UTC +/- hours) :
Approximate Position
X coordinate [m]: 4033463.1
Y coordinate [m]: 23662.8
Z coordinate [m]: 4924305.6
Latitude [deg]: 50.8674 N
Longitude [deg]: 0.3361 E
Elevation [m]: 75
Survey Method :
Date Measured :
Additional Information : The site is located in the grounds of
: Herstmonceux Castle
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3. General System Information
3.01 System Name : Herstmonceux
4-Character Code : HERL
CDP System Number : 35
CDP Occupation Number : 01
Eccentricity to SRP (if Not Identical With SRP)
North [m]:
East [m]:
Up [m]:
Date Measured : N.A.
Date Installed : 1982-01-01
Date Removed :
Additional Information :
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4. Telescope Information
4.01 Receiving Telescope Type : CASSEGRAIN
Aperture [m]: 0.5
Mount : AZ-EL
Date Installed : 1982-01-01
Date Removed :
Xmitting Telescope Type : REFRACTOR
Aperture [m]: 0.1
Date Installed : 1982-01-01
Date Removed :
Tracking Camera Type : TV on wide field Celestron
Model :
Manufacturer :
Field of View [deg]: 2.0
Minimum Magnitude [mag]: 8
Date Installed :
Date Removed :
Transmit/Receive Path : SEPARATE
Transmit/Receive Switch : NONE
Max Slew Rate Az [deg/s]: 20
Max Slew Rate El [deg/s]: 5
Max Used Tracking Rate Az : 20
Max Used Tracking Rate El : 5
Telescope Shelter : EYE-LID DOME, see additional information
Daylight Filter Type : Oven controlled spectral filter
Dayl. Filt. Bandwidth [nm]: 0.15
Adjustable Attenuation : NO
Adjustable Field of View :
Transmit Efficiency : 0.7
Receive Efficiency : 0.7
Date Installed : 1983-01-01
Date Removed : 2010-09-01
Additional Information : The dome`s hemisphere is divided into 4
: segments the bottom two of which are fixed
: to a circular rail and the top two open by
: sliding over the bottom two.
: The whole structure can be rotated manually,
: normally only necessary to protect the
: telescope/observer from the wind
: since this scheme means that all the sky
: above 25 degrees elevation is available with
: the dome in any position. In normal operation
: the lowest part of the opening are aligned
: East-West to provide access to the ground
: targets.
4.02 Receiving Telescope Type : CASSEGRAIN
Aperture [m]: 0.5
Mount : AZ-EL
Date Installed : 2010-09-01
Date Removed :
Xmitting Telescope Type : REFRACTOR
Aperture [m]: 0.1
Date Installed : 2010-09-01
Date Removed :
Tracking Camera Type : TV on wide field Celestron
Model :
Manufacturer :
Field of View [deg]: 2.0
Minimum Magnitude [mag]: 8
Date Installed :
Date Removed :
Transmit/Receive Path : SEPARATE
Transmit/Receive Switch : NONE
Max Slew Rate Az [deg/s]: 20
Max Slew Rate El [deg/s]: 5
Max Used Tracking Rate Az : 20
Max Used Tracking Rate El : 5
Telescope Shelter : EYE-LID DOME
Daylight Filter Type : Oven controlled spectral filter
Dayl. Filt. Bandwidth [nm]: 0.15
Adjustable Attenuation : NO
Adjustable Field of View :
Transmit Efficiency : 0.7
Receive Efficiency : 0.7
Date Installed : 2010-09-01
Date Removed :
Additional Information : The diocroic beam-splitter in the receive
: path has been replaced by a modern
: equivalent. The diocroic reflects
: non-green light to an intensified camera
: to enable star and satellite imaging
: The new optic`s transmit efficiency is
: greater than 95% and its polarisation
: discrimination is very low. There is
: sufficient reflection (~2%) of
: backscattered green laser light to enable
: the `beam` to be visible in the camera.
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5. Laser System Information
5.01 Laser Type : ND:YAG
Model :
Manufacturer :
Number of Amplifiers : 2
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]:
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 20
Xmit Energy Adjustable : NO
Additional Information :
Pulse Width (FWHM) [ps]: 100
Max. Repetition Rate [Hz]: 14
Fullw. Beam Divergence ["]: 5 - 200
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.03
Eyesafe : NO
Eyesafe Standard : British Standard 4803
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 : 1982-01-01
Date Removed :
Additional Information : An observer is always present at the
: telescope during ranging and using a slaved
: radar system to detect aircraft close to
: the beam and kill the laser. For terrestrial
: calibration a ND filter is inserted
: to render the beam eyesafe.
5.02 Laser Type : ND:VAN
Model :
Manufacturer :
Number of Amplifiers : 2
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]:
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 0.5
Xmit Energy Adjustable : NO
Additional Information :
Pulse Width (FWHM) [ps]: 10
Max. Repetition Rate [Hz]: 2000
Fullw. Beam Divergence ["]: 5 - 200
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.03
Eyesafe : NO
Eyesafe Standard : British Standard 4803
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 : 2005-06-01
Date Removed : 2014-10-06
Additional Information : Each one of the two lasers is selectable
: by the observer via the control interface
: in real time during observing.
: For example, for LRO ranging the 14Hz YAG
: is employed and the 2kHz VAN for most
: other observing, depending on sky
: conditions. The control system `knows`
: which laser was used for a given pass,
: and selects during reduction appropriate
: range calibration values from recent
: calibration ranging, carried out for each
: laser at least hourly.
5.03 Laser Type : ND:YAG
Model :
Manufacturer :
Number of Amplifiers : 2
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]:
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 1.0
Xmit Energy Adjustable : NO
Additional Information :
Pulse Width (FWHM) [ps]: 10
Max. Repetition Rate [Hz]: 1000
Fullw. Beam Divergence ["]: 5 - 200
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.03
Eyesafe : NO
Eyesafe Standard : British Standard 4803
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 : 2014-10-06
Date Removed :
Additional Information : Upgrade to Nd-Van 2kHz laser system,
: now Nd-Yag and gives more energy in the
: green (approx 1mj at 1 kHz).
: While 2 kHz operation is possible with
: less energy per pulse, we are currently
: running at 1 kHz.
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : CSPAD
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 1999-07-30
Date Removed : 2001-01-03
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 1995-01-01
Date Removed : 2007-02-01
Additional Information : Four Stanford counters of varying
: ages were used historically - for
: details of usage see SCH and
: SCI files. The telescope has a field of
: view of 10 arc minutes. However this is
: reduced to a maximum of 250 arcsecs
: by an iris in the light path.
: For normal daytime observing
: the iris size is reduced to 50 arcsecs.
: For normal night observing a 100 arcsecs
: iris is used.
: Whichever iris is used, the light is
: focused onto the detector via a field lens.
6.01.02 Primary Chain
Wavelength [nm]: 532
Detector Type : SPAD3b
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 2001-01-03
Date Removed : 2001-01-24
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 1995-01-01
Date Removed : 2007-02-01
Additional Information : Four Stanford counters of varying
: ages were used historically - for details
: of usage see SCH and SCI files.
: The telescope has a field of
: view of 10 arc minutes. However this is
: reduced to a maximum of 250 arcsecs
: by an iris in the light path.
: For normal daytime observing
: the iris size is reduced to 50 arcsecs.
: For normal night observing a 100 arcsecs
: iris is used.
: Whichever iris is used, the light is
: focused onto the detector via a field lens.
6.01.03 Primary Chain
Wavelength [nm]: 532
Detector Type : CSPAD
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 2001-01-24
Date Removed : 2002-10-04
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 1995-01-01
Date Removed : 2007-02-01
Additional Information : Four Stanford counters of varying
: ages were used historically -
: for details of usage see SCH and
: SCI files. The telescope has a field of
: view of 10 arc minutes. However this is
: reduced to a maximum of 250 arcsecs
: by an iris in the light path.
: For normal daytime observing
: the iris size is reduced to 50 arcsecs.
: For normal night observing a 100 arcsecs
: iris is used.
: Whichever iris is used, the light is
: focused onto the detector via a field lens.
6.01.04 Primary Chain
Wavelength [nm]: 532
Detector Type : SPAD3b
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 2002-10-04
Date Removed : 2002-10-16
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 1995-01-01
Date Removed : 2007-02-01
Additional Information : Four Stanford counters of varying
: ages were used historically -
: for details of usage see SCH and SCI
: files. The telescope has a field of
: view of 10 arc minutes. However this is
: reduced to a maximum of 250 arcsecs
: by an iris in the light path.
: For normal daytime observing
: the iris size is reduced to 50 arcsecs.
: For normal night observing a 100 arcsecs
: iris is used.
: Whichever iris is used, the light is
: focused onto the detector via a field lens.
6.01.05 Primary Chain
Wavelength [nm]: 532
Detector Type : CSPAD
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 2002-10-16
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 1995-01-01
Date Removed : 2007-02-01
Additional Information : Four Stanford counters of varying
: ages were used historically -
: for details of usage see SCH and SCI
: files. The telescope has a field of
: view of 10 arc minutes. However this is
: reduced to a maximum of 250 arcsecs
: by an iris in the light path.
: For normal daytime observing
: the iris size is reduced to 50 arcsecs.
: For normal night observing a 100 arcsecs
: iris is used.
: Whichever iris is used, the light is
: focused onto the detector via a field lens.
6.01.06 Primary Chain
Wavelength [nm]: 532
Detector Type : CSPAD
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 2002-10-16
Date Removed : 2009-02-01
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : Event Timer
Manufacturer : Home Build around 3 Thales Modules:
Model : 2x timing modules 2396-201-000 No.s 12 & 13
: 1x clock module 3396-211-000 No. 6
Resolution [ps]: 1
Precision [ps]: 5
Date Installed : 2007-02-01
Date Removed :
Additional Information :
6.01.07 Primary Chain
Wavelength [nm]: 532
Detector Type : SPAD
Manufacturer : PESO Consulting
Model :
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 1500
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 20 - 250
Date Installed : 2009-02-01
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single Photon
Additional Information:
Time of Flight Observ. : Event Timer
Manufacturer : Home build around 3 Thales Modules
Model : 2x timing modules 2396-201-000 No.s 12 & 13
: 1x clock module 3396-211-000 No. 6
Resolution [ps]: 1
Precision [ps]: 5
Date Installed : 2007-02-01
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) : YES
Low Altitude (400-2000) : YES
LAGEOS/LARES : YES
GLONASS : YES
Etalon : YES
GNSS : YES
Geosynchronous : NIGHT
Moon : NO
Ave. Pass Switch Time [s]: ~30
Average values for LAGEOS
Single Shot RMS [mm]: 16
# of Obs per NP : 150
Use of Semi-trains : YES
# of Semi-train Tracks : 4
Range Gate Width [ns]: 200 - 30000
Beam Pointing Accuracy ["]: 2
Angle Encoder Resolution["]: 2
Min. Tracking Elev. [deg]: 25
Laser Polarization @emitter:
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 20
Staff per Shift : 1
System Shared With : NOTHING
Time Allocated to SLR [%]: 100
Remotely Controllable : NO
Tracking Restrictions
Go/No-go flag : YES
Satellite Verification :
Date Verified :
Maximum elevation : YES
Satellite Verification :
Date Verified :
Pass segments : YES
Satellite Verification :
Date Verified :
Schedule segments :
Satellite Verification :
Date Verified :
Maximum laser power limit:
Satellite Verification :
Date Verified :
Date First Applicable : 1982-01-01 HH:MM UT
Date Last Applicable :
Additional Information : Hz laser
: With no ND filters in the receive path
: the daytime range-gate limit is of
: order 600ns. However for low satellites
: and considerable ND (up to 10^4), a
: range gate of 3000ns is possible. In
: practice a small range gate 500ns for
: low satellites is possible and the
: use of observer-entered time bias
: corrections is used to level the
: satellite O-C track satellite into
: the range gate. At night time a RG of
: up to 30000ns is possible without
: saturation.
7.02 Satellites
Very Low Alt (<400 km) : YES
Low Altitude (400-2000) : YES
LAGEOS/LARES : YES
GLONASS : YES
Etalon : YES
GNSS : YES
Geosynchronous : NIGHT
Moon : NO
Ave. Pass Switch Time [s]: ~30
Average values for LAGEOS
Single Shot RMS [mm]: 12
# of Obs per NP : 1000
Use of Semi-trains : NO
# of Semi-train Tracks : n/a
Range Gate Width [ns]: 200 - 2000
Beam Pointing Accuracy ["]: 2
Angle Encoder Resolution["]: 2
Min. Tracking Elev. [deg]: 25
Laser Polarization @emitter:
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 20
Staff per Shift : 1
System Shared With : NOTHING
Time Allocated to SLR [%]: 100
Remotely Controllable : NO
Tracking Restrictions
Go/No-go flag : YES
Satellite Verification :
Date Verified :
Maximum elevation : YES
Satellite Verification :
Date Verified :
Pass segments : YES
Satellite Verification :
Date Verified :
Schedule segments :
Satellite Verification :
Date Verified :
Maximum laser power limit:
Satellite Verification :
Date Verified :
Date First Applicable : 1982-01-01 HH:MM UT
Date Last Applicable :
Additional Information : KhZ laser
: With no ND filters in the receive path
: the daytime range-gate limit is of order
: 600ns. However for low satellites and
: considerable ND (up to 10^4), a range
: gate of 2000ns is possible.
: In practice a small range gate <500ns
: for low satellites is possible and the
: use of observer-entered time bias
: corrections is used to level the
: satellite O-C track satellite into the
: range gate.
: At night time a RG of up to 2000ns is
: possible without saturation.
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8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : EXTERNAL
Target Type : see additional information
Target Structure : BRICK BUILDING, see additional information
Number of Targets :
Target Distance(s) [m]: 120
Date Measured : 1993-06-09
Accuracy [mm]: 2-3
Verification : 4 other targets
Return-Rate Controlled : YES
Eye-Safe Method : ND filters plus partial mirror
Additional Information :
Mode of Operation : SINGLE PHOTON
Calibration performed : 60 see additional information
Single Shot RMS [mm]: 9
Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data : LINEAR FIT
Date Installed : 1982-01-01
Date Removed : 2018-02-05
Additional Information : Targets are made of two polished steel
: sheets at right angles so as to
: translate the beam horizontally from
: the emitter telescope to the receiving
: telescope. The 2 polished sheets are
: mounted on brick building about 30 feet
: above the ground, 120m from dome. The
: HERT IGS system is co-mounted and offers
: local stability monitoring.
: A secondary target of 2 polished sheets is
: mounted on standard concrete survey
: pillar about 3 feet above the ground
: at 600m.
: We will always attempt to get calibrations
: before and after satellite but when there
: are several satellites back-to-back we will
: calibrate before and after the batch. The
: realtime system gives alarm messages should
: the time since last calibration exceed 60
: minutes
8.03 Calibration Type : PRE+POST
Target Location : EXTERNAL
Target Type : see additional information
Target Structure : BRICK BUILDING, see additional information
Number of Targets :
Target Distance(s) [m]: 120
Date Measured : 2017-04-26
Accuracy [mm]: 1-2
Verification : 2 other targets
Return-Rate Controlled : YES
Eye-Safe Method : ND filters plus partial mirror
Additional Information :
Mode of Operation : SINGLE PHOTON
Calibration performed : 60 see additional information
Single Shot RMS [mm]: 4
Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data : LINEAR FIT
Date Installed : 2018-02-05
Date Removed :
Additional Information : Targets are made of two polished steel
: sheets at right angles so as to
: translate the beam horizontally from
: the emitter telescope to the receiving
: telescope. The 2 polished sheets are
: mounted on brick building about 30 feet
: above the ground, 120m from dome. The
: HERT IGS system is co-mounted and offers
: local stability monitoring. A new target
: of similar construction but easier to
: survey has been installed alongside the
: existing external target and surveyed
: in 2017.
: The new target is adopted as primary
: calibration as of 2018-02-05.
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : Crystal Oscillator
Model : 2110
Manufacturer : Austron
Short Term Stab. [e-12]: 3
Long Term Stab. [e-12]: 1
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: 100 - 300
Date Installed : 1996-06-19
Date Removed : 2010-05-15
Additional Information : Epoch accuracy not measured explicitly.
: A 10 MHz signal from the Datum GPS
: receiver is feed to the Austron
: Disciplined Frequency and that output
: is used for our time interval frequency.
9.01.02 Frequency Standard Type : Active Hydrogen maser (AHM)
Model : iMaser
Manufacturer : T4Science
Short Term Stab. [e-12]: 0.003
Long Term Stab. [e-12]: 0.001
Time Reference : GPS
Synchronization : N/A
Epoch Accuracy [ns]: 50
Date Installed : 2010-05-15
Date Removed :
Additional Information : A 10 MHz signal from the AHM is fed to
: the event timer and used as a very
: stable source of time interval frequency.
: A 1pps signal from the AHM is fed to the
: event timer in order to generate LR epochs.
: AHM drift is monitored relative to
: UTC (GPS) and as a result LR epochs are
: never allowed to drift relative to UTC(GPS)
: by more than ~30ns but greatly benefit from
: being independent of the ~20ns steering
: events in the GPS timescale.
: The AHM also drives the SGF IGS
: receiver HERS.
9.02.01 GNSS Timing Rcvr Model : 9390-52133
Manufacturer : Datum
Date Installed : 1995-01-01
Date Removed : 2018-12-05
Additional Information :
9.02.02 GNSS Timing Rcvr Model : S650
Manufacturer : Microsemi
Date Installed : 2018-12-05
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 : Orbit solution (SOLVE) + Gaussian fit
Return-Rate Rejection : above 20% return rate
Edit Criterion 1st Chain : 3.0 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : after each pass
Date First Applicable : 1982-01-01 HH:MM UT
Date Last Applicable :
Additional Information :
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11. Aircraft Detection
11.01 Detection Type : RADAR
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed : 1984-01-01
Date Removed :
Additional Information : RADAR interfaced to LR control s/w and
: automatically interrupts laser on detection
: of aircraft within ~2 degrees of laser
: direction.
: Observer always on the observing platform
: when ranging to satellites
11.02 Detection Type : Aircraft ADS-B receiver
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed : 2013-01-01
Date Removed :
Additional Information : Aircraft locations in alt-az are computed
: and displayed for the observer in ltime
: Audible warning sounds when any aircraft
: is predicted to pass close to direction of
: laser Observer always on the observing
: platform when ranging to satellites
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : DPI 141
Manufacturer : Druck
Recording Interval : EVERY 5 MINUTES
Accuracy [mbar]: 0.15
Height Diff to SRP [m]: 0
Distance from SRP [m]:
Date Installed : 1999-06-29 HH:MM UT
Calibration Interval : see below
Date Removed :
Additional Information : Pressures continuously compared with
: results from second Druck and with local
: mercury and UK Met Office barometers
12.02.01 Temp Sensor Model : HMP 140
Manufacturer : Vaisala
Recording Interval : EVERY 5 MINUTES
Accuracy [deg C]: 0.1
Date Installed : 1997-07-04 HH:MM UT
Calibration Interval : see below
Date Removed : 2001-12-18 HH:MM UT
Additional Information : Temperatures continuously compared with
: results from another temperature sensor
12.02.02 Temp Sensor Model : MP103A-T7-W4W
Manufacturer : Rotronics
Recording Interval : EVERY 5 MINUTES
Accuracy [deg C]: 0.1
Date Installed : 2001-12-18 HH:MM UT
Calibration Interval : see below
Date Removed : 2010-09-07 HH:MM UT
Additional Information : Temperatures continuously compared with
: results from another temperature sensor
12.02.03 Temp Sensor Model : MP103A-T7-W4W
Manufacturer : Rotronics
Recording Interval : EVERY 5 MINUTES
Accuracy [deg C]: 0.1
Date Installed : 2010-09-07 HH:MM UT
Calibration Interval : see below
Date Removed :
Additional Information : Temperatures continuously compared with
: results from another temperature sensor.
: Upgrade of previous model.
12.03.01 Humidity Sensor Model : HMP 140
Manufacturer : Vaisala
Recording Interval : EVERY 5 MINUTES
Accuracy [% rel h]: 5
Date Installed : 1996-06-19 HH:MM UT
Calibration Interval : see below
Date Removed : 2001-12-18 HH:MM UT
Additional Information : Relative humidities continuously compared
: with results from another device
12.03.02 Humidity Sensor Model : MP103A-T7-W4W
Manufacturer : Rotronics
Recording Interval : EVERY 5 MINUTES
Accuracy [% rel h]: 1.5
Date Installed : 2001-12-18 HH:MM UT
Calibration Interval : see below
Date Removed : 2010-09-07 HH:MM UT
Additional Information : Relative humidities continuously compared
: with results from another device
12.03.03 Humidity Sensor Model : MP103A-T7-W4W
Manufacturer : Rotronics
Recording Interval : EVERY 5 MINUTES
Accuracy [% rel h]: 1.5
Date Installed : 2010-09-07 HH:MM UT
Calibration Interval : see below
Date Removed :
Additional Information : Relative humidities continuously compared
: with results from another device.
: Upgrade of previous model.
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13. Local Ties, Eccentricities, and Collocation Information
13.01 Collocated Permanent Geodetic Systems
13.01.01.01 GNSS : IGS+EUREF
Date Installed : 1992-07-29
Date Removed :
Additional Info : HERS
13.01.01.02 GNSS : IGS+EUREF
Date Installed : 2003-03-01
Date Removed :
Additional Info : HERT
13.01.02.01 DORIS : NO
Date Installed :
Date Removed :
Additional Info :
13.01.03.01 PRARE : YES
Date Installed : 2005-06-01
Date Removed : 2005-11-01
Additional Info : PRARE System owned by UK Proudman
: Oceanography Lab installed for 6 months
: prior to shipping to South Atlantic
13.01.04.01 VLBI : NO
Date Installed :
Date Removed :
Additional Info :
13.01.05.01 Gravimeter : YES
Date Installed : 2006-10-19
Date Removed :
Additional Info : Absolute Gravimeter manufactured by Micro-g
: solutions, FG-5 229. Installed in basement
: of SGF below ground level to the south
: east of the SLR and to the south and below
: the HERS GNSS receiver.
: British Ordinance Survey positions for four
: position studs measured to allow for three
: visiting gravimeters to be run alongside the
: SGF 229 unit.
: Gravimeter room is constantly dehumidified
: and temperature controlled Hum~55%
: temp~22degC Routine Operations began 2007
: November.
: Nominally in use for 24hrs once per week.
: Upgraded to FG5-X in early 2013.
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 : HERS
Instrumentation Type : GPS+GLONASS
Instrumentation Status : PERMANENT
DOMES Number : 13212M007
CDP Number :
Differential Components (ITRS)
dx [m]: 6.4992 +- 0.001
dy [m]: 10.2707 +- 0.001
dz [m]: -3.9410 +- 0.001
Date Measured : 2008-06-15
Determined by : IGN, France
Date Installed : 1998-07-01
Date Removed :
Additional Information : IGS code for the GPS is HERS. The IGN major
: re-measurement gave up to 6mm changes from
: the original UK OS tie-results of 1992
13.02.02.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : HERT
Instrumentation Type : GPS+GLONASS (realtime stream)
Instrumentation Status : PERMANENT
DOMES Number : 13212M010
CDP Number :
Differential Components (ITRS)
dx [m]: -2.6863 +- 0.001
dy [m]: -124.8209 +- 0.001
dz [m]: 13.0074 +- 0.001
Date Measured : 2008-06-15
Determined by : IGN, France
Date Installed : 2003-03-01
Date Removed :
Additional Information : IGS code for the GPS is HERT. The IGN major
: re-measurements gave up to 15mm changes
: from the previous 2002 GPS campaign results
13.02.03.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : Absolute Gravimeter PIER 1
Instrumentation Type : FG-5
Instrumentation Status : FG-5 to be moved around piers
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]: 10.2216 +- 0.002
dy [m]: 8.8863 +- 0.005
dz [m]: -22.4002 +- 0.002
Date Measured : 2006-07-DD
Determined by : British Ordinance Survey
Date Installed : 2006-10-19
Date Removed :
Additional Information :
13.02.04.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : Absolute Gravimeter PIER 2
Instrumentation Type : FG-5
Instrumentation Status : FG-5 to be moved around piers
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]:
dy [m]:
dz [m]:
Date Measured : 2006-MM-DD
Determined by : British Ordinance Survey
Date Installed : 2006-10-19
Date Removed :
Additional Information :
13.02.05.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : Absolute Gravimeter PIER 3
Instrumentation Type : FG-5
Instrumentation Status : FG-5 to be moved around piers
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]:
dy [m]:
dz [m]:
Date Measured : 2006-MM-DD
Determined by : British Ordinance Survey
Date Installed : 2006-10-19
Date Removed :
Additional Information :
13.02.06.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : Absolute Gravimeter PIER 4
Instrumentation Type : FG-5
Instrumentation Status : FG-5 to be moved around piers
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]:
dy [m]:
dz [m]:
Date Measured : 2006-MM-DD
Determined by : British Ordinance Survey
Date Installed : 2006-10-19
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 : Natural Environment Research Council
Mailing Address : NERC Space Geodesy Facility
: Herstmonceux Castle
: Hailsham
: East Sussex BN27 1RN
Website : sgf.rgo.ac.uk
Primary Contact
Contact Name : Robert Sherwood
Telephone (primary) : +44 (0)1323 833888
Telephone (secondary) :
Fax :
E-mail : rshe@bgs.ac.uk
Secondary Contact
Contact Name : Matthew Wilkinson
Telephone (primary) : +44 (0)1323 833888
Telephone (secondary) :
Fax :
E-mail : matwi@bgs.ac.uk
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 : Natural Environment Research Council,
: British Geological Survey
Mailing Address : Director of Earth Hazards and Observatories
: British Geological Survey,
: West Mains Road, Edinburgh EH9 3LA
Primary Contact
Contact Name : Dr David Kerridge
Telephone (primary) : +44 131 650 0220
Telephone (secondary) :
Fax :
E-mail : djk@bgs.ac.uk
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information :
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17. More Information
URL for More Information : http://sgf.rgo.ac.uk/
Hardcopy on File
Site Map : YES
Site Diagram : YES
Horizon Mask : NO
Monument Description : NO
Site Pictures : YES
Additional Information :
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