 |
 |
 |
|
ILRS Home  Stations Site Listing Greenbelt
|
|
 |
|
 |
Engineering Sites |
| Mt. Stromlo (STRK) |
| Stafford (STAL) |
Inactive Sites |
| Mendeleevo2 (MDVS) |
Greenbelt: 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) : Van S. Husson, Paul Stevens
Preparer E-mail : van.husson@honeywell-tsi.com
paul.stevens@honeywell-tsi.com
Date Prepared : 2002-07-09
Report Type : UPDATE
Format Version : 1.0
Back to top
1. Identification of the Ranging System Reference Point (SRP)
Site Name : Goddard Geophysical Astronomical Observatory
IERS DOMES Number : 40451M105
CDP Pad ID : 7105
Subnetwork : NASA
Description : MONUMENT
Monument Description : STANDARD NASA DISK
Monument Inscription : 7105-1981
Mark Description : Chiselled Cross
Date Installed : 1981-03-01
Date Removed : (yyyy-mm-dd)
Geologic Characteristic : CRETACEOUS SAND AND GRAVEL
Additional Information : (multiple lines)
Back to top
2. Site Location Information
City or Town : Greenbelt
State or Province : Maryland
Country : USA
Tectonic Plate : North American
Approximate Position
X coordinate [m]: 1130719.703
Y coordinate [m]: -4831350.572
Z coordinate [m]: 3994106.526
Latitude [deg]: 39.0056 N
Longitude [deg]: 76.6610 W
Elevation [m]: 19.195
Additional Information : (multiple lines)
Back to top
3. General System Information
3.01 System Name : MOBLAS 7
4-Character Code : GODL
CDP System Number : 07
CDP Occupation Number : 25
Eccentricity to SRP (if Not Identical With SRP)
North [m]: -0.008 +- 0.002
East [m]: -0.032 +- 0.002
Up [m]: 3.139 +- 0.002
Date Measured : 1998-12-12
Date Installed : 1981-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
Back to top
4. Telescope Information
4.01 Receiving Telescope Type : CASSEGRAIN
Aperture [m]: 0.762
Mount : AZ-EL
Xmitting Telescope Type : REFRACTOR
Aperture [m]: 0.163
Tracking Camera Type : CCD
Model : GEN II INTENSIFIER
Manufacturer : HTSI
Field of View [deg]:
Minimum Magnitude [mag]:
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 : 5
Max Used Tracking Rate El : 3
Telescope Shelter : ROLL-BACK ROOF
Daylight Filter Type : Omega Optical 532NB1 9114
Dayl. Filt. Bandwidth [nm]: 100
Adjustable Attenuation : RECEIVE
Transmit Efficiency : 0.94
Receive Efficiency : 0.76
Date Installed : 1981-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : CCD built from Coho CCD head and
Litton image intensifier, receive
efficiency is .76 without daylight
filter and .54 with daylight filter
Back to top
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 ["]: 30
Final Beam Diameter [m]: 0.093
Eyesafe : NO
Eyesafe Standard : ANSI 136.1
Date Installed : 1981-03-01
Date Removed : (yyyy-mm-dd)
Additional Information : 1) Laser repetition rate is 10 Hz,
but the time interval counter
restricts the maximum rate to 5 Hz.
2) Laser Cavity Upgrade 2001-09-07.
Back to top
6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : MCP
Manufacturer : ITT
Model : F4129F
Quantum Efficiency [%]: 17.7
Nominal Gain : 1E+06
Rise Time [ps]: 350
Jitter (Single PE)[ps]: 100
Field of View ["]: 360
Date Installed : 1986-03-31
Date Removed : (yyyy-mm-dd)
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 1986-03-31
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 : 1986-03-31
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
6.02.01 Secondary Chain
Wavelength [nm]: 532
Detector Type : MCP
Manufacturer : ITT
Model : F4129F
Quantum Efficiency [%]: 17.7
Nominal Gain : 1E+06
Rise Time [ps]: 350
Jitter (Single PE)[ps]: 100
Field of View ["]: 360
Date Installed : 1986-03-31
Date Removed : (yyyy-mm-dd)
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 1986-03-31
Date Removed : (yyyy-mm-dd)
Amplitude Measurement : YES
Return-rate Controlled: YES
Mode of Operation : Single to Multi Photons
Time of Flight Observ. : INTERVAL
Manufacturer : Hewlett-Packard
Model : 5370B
Resolution [ps]: 20
Precision [ps]: 35
Date Installed : 1986-03-31
Date Removed : (yyyy-mm-dd)
Additional Information : High sensivity laser receiver configuration,
installed 1996-05-19. Everything is the same
as the primary chain except the discriminator
threshold has been lowered to accept single
photons and the signal is amplified with
24 dB of gain
Back to top
7. Tracking Capabilities
7.01 Satellites
Very Low Alt (<400 km) : YES
Low Altitude (400-2000) : YES
Lageos : YES
GLONASS : YES
Etalon : NIGHT
GPS : NIGHT
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 ["]: 0.6
Angle Encoder Resolution["]: 0.6
Min. Tracking Elev. [deg]: 20
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 24
Staff per Shift : 1
System Shared With : R&D
Time Allocated to SLR [%]: 100
Remotely Controllable : NO
Date First Applicable : 1996-12-01
Date Last Applicable : (yyyy-mm-dd)
Additional Information : Station is not available for ranging
on US holidays.
Back to top
8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : EXTERNAL
Target Type : CORNER CUBE
Target Structure : CONCRETE PIER
Target Distance [m]: 170
Date Measured : 1998-12-12
Accuracy (mm) [mm]: 2
Verification : first order survey and ranging to multiple ground targets
Return-rate Controlled : YES
Mode of Operation : FEW to MULTI
Average Cal Interval [min]: 3.5
Single Shot RMS [mm]: 5 +- 1
Edit Criterion 1st Chain : ITERATIVE 3 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data : AVERAGE
Date Installed : 1990-07-24
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
Back to top
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 : 1999-05-23
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 : 1999-03-04
Date Removed : (yyyy-mm-dd)
Additional Information : CNS clock used for comparisons
Back to top
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 : 1991-12-09
Date Last Applicable : 2001-02-08
Additional Information : (multiple lines)
10.02 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 : 2001-02-08
Date Last Applicable : (yyyy-mm-dd)
Additional Information : Generic Normal Processing Version 2.0
installed 2001-02-08.
Back to top
11. Aircraft Detection
11.01 Detection Type : RADAR
Date Installed : 1994-08-31
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
Back to top
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]: -0.15
Date Installed : 2000-03-30
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 : 2000-03-30
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 PASS
Accuracy [% rel h]: 2
Date Installed : 2000-03-30
Calibration Interval : yearly
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
Back to top
13. Local Ties, Eccentricities, and Collocation Information
13.01 Collocated Permanent Geodetic Systems
GPS : IGS
Date Installed : 1993-04-02
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
GLONASS : NO
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
DORIS : IDS
Date Installed : 2000-06-29
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
PRARE : YES
Date Installed : 1995-05-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
VLBI : IVS
Date Installed : 1993-04-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
Gravimeter : NO
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)
13.03.01 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : North GEOS Pier
DOMES Number : 40451M110
CDP Number :
Differential Components (ITRS)
dx [m]: 11.6967 +- 0.002
dy [m]: 27.9696 +- 0.002
dz [m]: 29.9564 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.02 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : CDP Station 7125
DOMES Number : 40451M114
CDP Number : 7125
Differential Components (ITRS)
dx [m]: 26.0377 +- 0.002
dy [m]: -17.4605 +- 0.002
dz [m]: -29.3887 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.03 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : CDP Station 7920
DOMES Number : 40451M117
CDP Number : 7920
Differential Components (ITRS)
dx [m]: 22.1812 +- 0.002
dy [m]: -19.2155 +- 0.002
dz [m]: -30.4096 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.04 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : CDP Station 7130
DOMES Number : 40451M116
CDP Number : 7130
Differential Components (ITRS)
dx [m]: 15.5755 +- 0.002
dy [m]: 25.9070 +- 0.002
dz [m]: 25.8559 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.05 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : CDP Station 7918
DOMES Number : 40451M120
CDP Number : 7918
Differential Components (ITRS)
dx [m]: -14.4196 +- 0.002
dy [m]: 5.1378 +- 0.002
dz [m]: 9.4549 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.06 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : JPL 4006 (GPS East)
DOMES Number : 40451M123
CDP Number : 4006
Differential Components (ITRS)
dx [m]: 54.2314 +- 0.002
dy [m]: 97.0090 +- 0.002
dz [m]: 93.8623 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : IGS site code is GODE.
For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.07 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : SGP 7108
DOMES Number : 40451M125
CDP Number : 7108
Differential Components (ITRS)
dx [m]: 75.1266 +- 0.002
dy [m]: 116.7620 +- 0.002
dz [m]: 110.5077 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : 7108 is the Mobile VLBI (MV)-3 marker.
For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.08 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : JPL 4005 (GPS West)
DOMES Number : 40451M124
CDP Number : 4005
Differential Components (ITRS)
dx [m]: 33.3058 +- 0.002
dy [m]: 88.3919 +- 0.002
dz [m]: 88.9674 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : IGS site code is GODW.
For more information about
contact Jim Long at
jim.long@honeywell-tsi.com
13.03.09 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : MV-3 SRP (VLBI)
DOMES Number : 40451M125
CDP Number : 7108
Differential Components (ITRS)
dx [m]: 75.9012 +- 0.002
dy [m]: 113.5125 +- 0.002
dz [m]: 113.2697 +- 0.002
Date Measured : 1998-12-12
Determined by : HTSI
Additional Information : This is the system reference point
for MV-3. For more information
contact Jim Long at
jim.long@honeywell-tsi.com .
13.03.10 Eccentricities Between Other Monuments on Site
From: Monument Name : CDP Station 7105
DOMES Number : 40451M105
CDP Number : 7105
To: Monument Name : GREB (DORIS)
DOMES Number : 40451S176
CDP Number : N.A.
Differential Components (ITRS)
dx [m]: -8.343 +- 0.002
dy [m]: -41.346 +- 0.002
dz [m]: -45.362 +- 0.002
Date Measured : 2000-01-01
Determined by : HTSI
Additional Information : For more information
contact Jim Long at
jim.long@honeywell-tsi.com .
Back to top
14. Local Events Possibly Affecting Computed Position
14.01 Date : (yyyy-mm-dd hh:mm UT)
Event : (EARTHQUAKE/CONSTRUCTION/etc)
Additional Information : (multiple lines)
Back to top
15. On-Site, Point of Contact Agency Information
Agency : HTSI
Mailing Address : NASA SLR
: 7515 Mission Dr
: Lanham, Md 20706
Primary Contact
Contact Name : Maceo Blount
Telephone (primary) : 301-286-5050
Telephone (secondary) :
Fax : 301-286-1636
E-mail : maceo.blount@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)
Back to top
16. Responsible Agency (if different from 15.)
Agency : NASA, Code 920.1
Mailing Address : Code 920.1
: 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)
Back to top
17. More Information
URL for More Information : N.A.
Hardcopy on File
Site Map : YES
Site Diagram : YES
Horizon Mask : YES
Monument Description : YES
Site Pictures : YES
Additional Information : contact Jim Long at HTSI for
more information at
jim.long@honeywell-tsi.com
Back to top
