Site Log - Ishioka, Japan (7317)
ILRS Site and System Information Form
International Laser Ranging Service
0. Form
Prepared by (Full Name) : Toshimichi Otsubo
Preparer E-mail : t.otsubo@r.hit-u.ac.jp
Date Prepared : 2025-04-11
Report Type : UPDATE
Site Log Format Version : 2.0
Site Log Revision : 0.13
1. Identification of the Ranging System Reference Point (SRP)
Site Name : Ishioka
IERS DOMES Number : 21791M008
CDP Pad ID : 7317
Subnetwork : WPLTN
Description : MONUMENT
Monument Description : PILLAR
Monument Inscription : N.A.
Mark Description : ENGRAVED CROSS ON A METALLIC MONUMENT
Date Installed : 2024-06-03
Date Removed : N.A.
Geologic Characteristic : METAMORPHIC ROCKS
Additional Information : DOMES Number of SLR Az-El intersection
: is 21791S002.
2. Site Location Information
City or Town : Ishioka
State or Province : Ibaraki
Country : Japan
Tectonic Plate : North American
Local Time (UTC +/- hours) : 9
Approximate Position
X coordinate [m]: -3959592.7
Y coordinate [m]: 3296886.6
Z coordinate [m]: 3747021.9
Latitude [deg]: 36.2090 N
Longitude [deg]: 140.2181 E
Elevation [m]: 157
Survey Method : TBD
Date Measured : 2025-MM-DD
Additional Information :
3. General System Information
3.01 System Name : Ishioka
4-Character Code : ISHL
CDP System Number : 95
CDP Occupation Number : 01
Eccentricity to SRP (if Not Identical With SRP)
North [m]: 0.000 +- 0.003
East [m]: 0.000 +- 0.003
Up [m]: 1.5408 +- 0.003
Date Measured : 2024-10-18
Date Installed : 2024-06-03
Date Removed :
Additional Information : DOMES Number of SLR Marker is 21791M008,
: that of SLR Az-El intersection is 21791S002.
4. Telescope Information
4.01 Receiving Telescope Type : RITCHE-CHRETIEN
Aperture [m]: 0.2
Mount : AZ-EL
Date Installed : 2024-06-03
Date Removed :
Xmitting Telescope Type : REFRACTOR
Aperture [m]: 0.08
Date Installed : 2024-09-01
Date Removed :
Tracking Camera Type : CMOS
Model : FMA180Pro+ASI533MM and FMA180Pro+ASI178MM
Manufacturer : Askar and ZWO
Field of View [deg]: 2
Minimum Magnitude [mag]:
Date Installed :
Date Removed :
Transmit/Receive Path : SEPARATE
Transmit/Receive Switch : NONE
Max Slew Rate Az [deg/s]: 4
Max Slew Rate El [deg/s]: 4
Max Used Tracking Rate Az : 3
Max Used Tracking Rate El : 3
Telescope Shelter : SLIDING ROOF
Daylight Filter Type : SPECTRAL FILTER
Dayl. Filt. Bandwidth [nm]: 1
Adjustable Attenuation : RECEIVE
Adjustable Field of View : NO
Transmit Efficiency :
Receive Efficiency :
Date Installed : 2024-06-03
Date Removed :
Additional Information :
5. Laser System Information
5.01 Laser Type : ND:YAG
Model : FDSS532-Q2
Manufacturer : CryLAS
Number of Amplifiers : 0
Primary Wavelength [nm]: 532
Primary Maximum Energy [mJ]: 0.006
Secondary Wavelength [nm]:
Secondary Max. Energy [mJ]:
Xmit Energy Adjustable : NO
Additional Information :
Pulse Width (FWHM) [ps]: 1060
Max. Repetition Rate [Hz]: 10000
Fullw. Beam Divergence ["]: 15
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.08
Eyesafe : YES
Eyesafe Standard :
Polarization on Exit : LINEAR
Laser Fire Control :
Laser Energy Monitor :
Start Diode Type : EMBEDDED IN LASER
Manufactorer :
Model :
Quantum Efficiency [%]:
Rise/Fall Time [ps]:
Date Installed :
Date Removed :
Signal Processing :
Manufacturer :
Model :
Date Installed :
Date Removed :
Additional Information :
Date Installed : 2024-06-03
Date Removed :
Additional Information :
6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : SPAD
Manufacturer : Hamamatsu Photonics
Model : C11202-100
Quantum Efficiency [%]: 70
Nominal Gain :
Rise Time [ps]:
Jitter (Single PE)[ps]:
Field of View Diam ["]: 15
Date Installed : 2024-06-03
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. : EVENT
Manufacturer : Swabian Instruments
Model : Time Tagger Ultra (Value)
Resolution [ps]: 1
Precision [ps]: 42
Date Installed : 2024-06-03
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 :
7. Tracking Capabilities
7.01 Satellites
Very Low Alt (<400 km) : YES
Low Altitude (400-2000) : YES
LAGEOS/LARES : NIGHT
GLONASS : NO
Etalon : NO
GNSS : NO
Geosynchronous : NO
Moon : NO
Ave. Pass Switch Time [s]: 60
Average values for LAGEOS
Single Shot RMS [mm]: 65
# of Obs per NP : 10
Use of Semi-trains : NO
# of Semi-train Tracks :
Range Gate Width [ns]:
Beam Pointing Accuracy ["]: 10
Angle Encoder Resolution["]: 0.3
Min. Tracking Elev. [deg]: 20
Laser Polarization @emitter: LINEAR
Operation
Months per Year :
Days per Week :
Hours per Day :
Staff per Shift :
System Shared With :
Time Allocated to SLR [%]:
Remotely Controllable :
Tracking Restrictions
Go/No-go flag : NO
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 :
Date Last Applicable :
Additional Information :
8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : EXTERNAL
Target Type : 1 Mirror and 1 Diffuser
Target Structure : METAL POLE
Number of Targets : 1
Target Distance(s) [m]: 11.3086
Date Measured : 2025-03-24
Accuracy [mm]: 0.003
Verification :
Return-Rate Controlled : YES
Eye-Safe Method :
Additional Information :
Mode of Operation : SINGLE PHOTON
Calibration performed : HOU
Single Shot RMS [mm]: 65
Edit Criterion 1st Chain :
Edit Criterion 2nd Chain :
Application of Cal Data :
Date Installed : 2025-01-17
Date Removed :
Additional Information :
9. Time and Frequency Standards
9.01.01 Frequency Standard Type : OCXO
Model : TB-1
Manufacturer : Furuno
Short Term Stab. [e-12]: 50
Long Term Stab. [e-12]: 1
Time Reference : GPS+GLONASS
Synchronization : GNSS
Epoch Accuracy [ns]: 40
Date Installed : 2024-06-03
Date Removed :
Additional Information :
9.02.01 GNSS Timing Rcvr Model : TB-1
Manufacturer : Furuno
Date Installed : 2024-06-03
Date Removed :
Additional Information :
9.03.01 One-way System Calibration
Date performed :
Direction Calibrated :
Additional Information :
10. Preprocessing Information
10.01 On-site NP Generation : YES
Data Screening : CPF+HISTOGRAM with OrbitNP.py
Return-Rate Rejection : Always single photoelectron; 10+ returns/NP
Edit Criterion 1st Chain : Iterative 3 sigma rejection using OrbitNP.py
Edit Criterion 2nd Chain :
Upload interval :
Date First Applicable :
Date Last Applicable :
Additional Information :
11. Aircraft Detection
11.01 Detection Type : ADS-B
Manufacturer/Provider : FlightAware
Automatic Laser Shutoff : YES
Alarms Recorded : No
Hazard Distance [km]: 0
Date Installed : 2024-06-03
Date Removed :
Additional Information :
12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : PTB330
Manufacturer : Vaisala
Recording Interval : 5 minutes
Accuracy [mbar]: 0.15
Height Diff to SRP [m]: 0.8
Distance from SRP [m]: 4
Date Installed : 2024-06-03 03:00 UT
Calibration Interval :
Date Removed :
Additional Information :
12.02.01 Temp Sensor Model : TR-72nw
Manufacturer : T&D
Recording Interval : 5 minutes
Accuracy [deg C]: 0.5
Date Installed : 2024-06-03 03:00 UT
Calibration Interval :
Date Removed :
Additional Information :
12.03.01 Humidity Sensor Model : TR-72nw
Manufacturer : T&D
Recording Interval : 5 minutes
Accuracy [% rel h]: 5
Date Installed : 2024-06-04 03:00 UT
Calibration Interval :
Date Removed :
Additional Information :
13. Local Ties, Eccentricities, and Collocation Information
13.01 Collocated Permanent Geodetic Systems
13.01.01.01 GNSS : ISHI
Date Installed : 2014-03-11
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 : YES
Date Installed : 2014-04-01
Date Removed :
Additional Info :
13.01.05.01 Gravimeter : ABSOLUTE
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 :
14. Local Events Possibly Affecting Computed Position
14.01 Date :
Event :
Additional Information :
15. On-Site, Point of Contact Agency Information
Agency : Hitotsubashi University
Mailing Address : 2-1 Naka, Kunitachi
Website : geo.science.hit-u.ac.jp
Primary Contact
Contact Name : Toshimichi Otsubo
Telephone (primary) : +81-42-580-8968
Telephone (secondary) :
Fax :
E-mail : t.otsubo@r.hit-u.ac.jp
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Tertiary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information :
16. Responsible Agency (if different from 15.)
Agency : Geospatial Information Authority of Japan
Mailing Address : 1 Kitasato, Tsukuba
Primary Contact
Contact Name : Takahiro Wakasugi
Telephone (primary) : +81-29-864-4813
Telephone (secondary) :
Fax :
E-mail : wakasugi-t96kg@mlit.go.jp
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information : www.gsi.go.jp/uchusokuchi/vlbi-igos.html
17. More Information
URL for More Information :
Hardcopy on File
Site Map :
Site Diagram :
Horizon Mask :
Monument Description :
Site Pictures :
Additional Information : Registered as an engineering station