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ILRS Home  Stations Site Listing Greenbelt (TLRS-4)
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Greenbelt (TLRS-4): Site Log
Instructions and Update Site Log
You can use the hyperlinks to quickly get to the section of interest or you can scroll down to read them all.
Section: 0. FormSection: 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) : Craig Foreman
Preparer E-mail : Craig.Foreman@honeywell-tsi.com
Date Prepared : 2006-01-17
Report Type : UPDATE
Format Version : 1.0
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1. Identification of the Ranging System Reference Point (SRP)
Site Name : Goddard Geophysical Astronomical Observatory
IERS DOMES Number : 40451M116
CDP Pad ID : 7130
Subnetwork : NASA
Description : MONUMENT
Monument Description : STANDARD NASA DISK
Monument Inscription : (text/NONE/N.A.)
Mark Description : (CHISELLED CROSS/DIVOT/BRASS NAIL/N.A./etc)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Geologic Characteristic : CRETACEOUS SAND AND GRAVEL
Additional Information : (multiple lines)
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2. Site Location Information
City or Town : Greenbelt
State or Province : Maryland
Country : USA
Tectonic Plate : North American
Approximate Position
X coordinate [m]: 1130735.2
Y coordinate [m]: -4831324.7
Z coordinate [m]: 3994132.4
Latitude [deg]: 39.0209 N
Longitude [deg]: 76.8275 W
Elevation [m]: 18.632
Additional Information : (multiple lines)
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3. General System Information
3.01 System Name : TLRS 4
4-Character Code : GGAO
CDP System Number : 14
CDP Occupation Number : 03
Eccentricity to SRP (if Not Identical With SRP)
North [m]: 0.0002 +- 0.001
East [m]: 0.0010 +- 0.001
Up [m]: 2.6472 +- 0.001
Date Measured : 1999-02-02
Date Installed : 2005-01-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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4. Telescope Information
4.01 Receiving Telescope Type : CASSEGRAIN
Aperture [m]: .28
Mount : AZ-EL
Xmitting Telescope Type : CASSEGRAIN
Aperture [m]: .28
Tracking Camera Type : CCD
Model :
Manufacturer : Pelco
Field of View [deg]: .012
Minimum Magnitude [mag]: 6
Transmit/Receive Path : COMMON
Transmit/Receive Switch : ROTATING MIRROR
Max Slew Rate Az [deg/s]: 10
Max Slew Rate El [deg/s]: 10
Max Used Tracking Rate Az : 1
Max Used Tracking Rate El : 1
Telescope Shelter : DOME
Daylight Filter Type : SPECTRAL FILTER
Dayl. Filt. Bandwidth [nm]: .3
Adjustable Attenuation : RECEIVE
Transmit Efficiency : .82
Receive Efficiency : .82
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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5. Laser System Information
5.01 Laser Type : ND:YAG
Number of Amplifiers : 1
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: 200
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 100
Xmit Energy Adjustable : YES
Pulse Width (FWHM) [ps]: 200
Max. Repetition Rate [Hz]: 5
Fullw. Beam Divergence ["]: 1.6 mrad
Final Beam Diameter [m]: .009
Eyesafe : NO
Eyesafe Standard : ANSI 136.1
Date Installed : 1998-05-18)
Date Removed : (yyyy-mm-dd)
Additional Information : 1) 4hz capability added, 2005-11-16
2) Pulse slicer upgrade, (2002-12-02)
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : MCP
Manufacturer : PHOTEK
Model : PMT318SA
Quantum Efficiency [%]:
Nominal Gain : 10e7
Rise Time [ps]: 250
Jitter (Single PE)[ps]:
Field of View ["]: (minimum-maximum or fixed value)
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Amplitude Measurement : YES
Return-rate Controlled: YES
Mode of Operation : Few to Multi Photons
Time of Flight Observ. : INTERVAL
Manufacturer : Hewlett-Packard
Model : 5370B
Resolution [ps]: 20
Precision [ps]: 35
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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7. Tracking Capabilities
7.01 Satellites
Very Low Alt (<400 km) : YES
Low Altitude (400-2000) : YES
Lageos : YES
GLONASS : NO
Etalon : NO
GPS : NO
Moon : NO
Avge Pass Switch Time [s]: 60
Average values for Lageos
Single Shot RMS [mm]: 10
# of Obs per NP : 150
Use of Semi-trains : NO
# of Semi-train Tracks : N.A.
Range Gate Width [ns]: 2000
Beam Pointing Accuracy ["]:
Angle Encoder Resolution["]:
Min. Tracking Elev. [deg]: 20
Operation
Months per Year : 12
Days per Week :
Hours per Day :
Staff per Shift : 1
System Shared With : NOTHING
Time Allocated to SLR [%]: 100
Remotely Controllable : NO
Date First Applicable : 2005-07-10 00:40 UT
Date Last Applicable : (yyyy-mm-dd hh:mm UT)
Additional Information : Station is not available for ranging
on US holidays.
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8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : EXTERNAL
Target Type : CORNER CUBE
Target Structure : CONCRETE PIER
Target Distance [m]: 163.3604
Date Measured : 2005-07-23
Accuracy (mm) [mm]: c
Verification : (multiple lines)
Return-rate Controlled : YES
Mode of Operation : FEW to MULTI
Average Cal Interval [min]: 120
Single Shot RMS [mm]:
Edit Criterion 1st Chain : ITERATIVE 3 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data : AVERAGE
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : Rubidium disciplined by GPS
Model : XL-DC 151-358-108-2
Manufacturer : TrueTime
Short Term Stab. [e-12]: 10
Long Term Stab. [e-12]: 3
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: <100
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : This Truetime model contains the
Stanford PRS10 Rubidium Frequency
Standard
9.02.01 GPS Timing Rcvr Model : XL-DC 151-358-108-2
Manufacturer : TrueTime
Date Installed : 2005-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : CNS clock used for comparisons
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10. Preprocessing Information
10.01 On-site NP Generation : YES
Data Screening : IRV+POLYNOMIAL
Edit Criterion 1st Chain : ITERATIVE 3.0 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : HOURLY
Date First Applicable : 2005-07-10 00:40 UT
Date Last Applicable : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
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11. Aircraft Detection
11.01 Detection Type : RADAR
Date Installed : 1998-08-27
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : MET3
Manufacturer : Paroscientific
Recording Interval : PER PULSE
Accuracy [mbar]: 0.1
Height Diff to SRP [m]:
Date Installed : 2005-03-01 00:00 UT
Calibration Interval : YEARLY
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
12.02.01 Temp Sensor Model : MET3
Manufacturer : Paroscientific
Recording Interval : PER PULSE
Accuracy [deg C]: 0.5
Date Installed : 2005-03-01 00:00 UT
Calibration Interval : YEARLY
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
12.03.01 Humidity Sensor Model : MET3
Manufacturer : Paroscientific
Recording Interval : PER PULSE
Accuracy [% rel h]: 2
Date Installed : 2005-03-01 00:00 UT
Calibration Interval : YEARLY
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
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13. Local Ties, Eccentricities, and Collocation Information
13.01 Collocated Permanent Geodetic Systems
GPS : (NO/IGS/EUREF/etc)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
GLONASS : (NO/IGEX/IGLOS/etc)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
DORIS : (YES/NO)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
PRARE : (YES/NO)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
VLBI : (YES/NO)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
Gravimeter : (NO/SUPERCONDUCTING/ABSOLUTE/EARTH TIDE/etc)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
13.02.xx Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name :
Instrumentation Type : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/NONE)
Instrumentation Status : (PERMANENT/MOBILE)
DOMES Number : (XXXXXXXXX)
CDP Number : (XXXX)
Differential Components (ITRS)
dx [m]: (m +- m)
dy [m]: (m +- m)
dz [m]: (m +- m)
Date Measured : (yyyy-mm-dd)
Determined by :
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
13.03.xx Eccentricities Between Other Monuments on Site
From: Monument Name :
DOMES Number : (XXXXXXXXX)
CDP Number : (XXXX)
To: Monument Name :
DOMES Number : (XXXXXXXXX)
CDP Number : (XXXX)
Differential Components (ITRS)
dx [m]: (m +- m)
dy [m]: (m +- m)
dz [m]: (m +- m)
Date Measured : (yyyy-mm-dd)
Determined by :
Additional Information : (multiple lines)
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14. Local Events Possibly Affecting Computed Position
14.xx Date : (yyyy-mm-dd hh:mm UT)
Event : (EARTHQUAKE/CONSTRUCTION/etc)
Additional Information : (multiple lines)
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15. On-Site, Point of Contact Agency Information
Agency : HTSI
Mailing Address : NASA SLR, 7515 Mission Dr.,
Lanham, MD 20706
Primary Contact
Contact Name : Dennis McCollums
Telephone (primary) : 301-805-3940
Telephone (secondary) : 301-286-3886
Fax : 301-805-3974
E-mail : Dennis.McCollums@honeywell-tsi.com
Secondary Contact
Contact Name : Scott Wetzel
Telephone (primary) : 301-805-3987
Telephone (secondary) :
Fax : 301-805-3974
E-mail : Scott.Wetzel@honeywell-tsi.com
Additional Information : (multiple lines)
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16. Responsible Agency (if different from 15.)
Agency : NASA, Code 453
Mailing Address : Code 453
: NASA/GSFC
: Greenbelt, MD 20771 USA
Primary Contact
Contact Name : David Carter
Telephone (primary) : 301-614-5966
Telephone (secondary) :
Fax : 301-614-5970
E-mail : dlcarter@pop900.gsfc.nasa.gov
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information : (multiple lines)
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17. More Information
URL for More Information : (N.A.)
Hardcopy on File
Site Map : (YES/NO)
Site Diagram : (YES/NO)
Horizon Mask : (YES/NO)
Monument Description : (YES/NO)
Site Pictures : (YES/NO)
Additional Information : (multiple lines)
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