GODZ Site Information Form (site log) International GNSS Service See Instructions at: ftp://igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Tatevik Shakhbandaryan Date Prepared : 2016-12-05 Report Type : UPDATE If Update: Previous Site Log : godz_20130130.log Modified/Added Sections : 0,10.6 1. Site Identification of the GNSS Monument Site Name : GGAO Four Character ID : GODZ Monument Inscription : JPL 4006 IERS DOMES Number : 40451M123 CDP Number : none Monument Description : Concrete Pillar with imbedded plate Height of the Monument : 0.4 m above ground m Monument Foundation : Reinforced Concrete, 0.76 m diameter Foundation Depth : 3 meter m Marker Description : SS Plate, 0.457 m dia., with 1 mm center hole Date Installed : 1993-04-02T00:00Z Geologic Characteristic : Sand and Gravel Bedrock Type : SEDIMENTARY Bedrock Condition : UNKNOWN Fracture Spacing : unknown Fault zones nearby : unknown Distance/activity : Additional Information : The marker plate is engraved "GODDARD GORF : (EAST) FLINN GPS STATION MARK JPL 4006 1992" 2. Site Location Information City or Town : Greenbelt State or Province : Maryland Country : United States Tectonic Plate : NORTH AMERICAN Approximate Position (ITRF) X coordinate (m) : +1130773.867 Y coordinate (m) : -4831253.583 Z coordinate (m) : +3994200.409 Latitude (N is +) : +390118.22 Longitude (E is +) : -0764936.58 Elevation (m,ellips.) : 14.509 Additional Information : Station is located at Goddard Geophysical and : Astronomic Observatory (GGAO) 3. GNSS Receiver Information 3.1 Receiver Type : ASHTECH Z18 Satellite System : GPS+GLO Serial Number : 199909123 Firmware Version : 6.4 Elevation Cutoff Setting : 0.0 deg Date Installed : 1999-04-22T15:50Z Date Removed : 2001-01-23T17:00Z Temperature Stabiliz. : none Additional Information : 3.2 Receiver Type : ASHTECH Z18 Satellite System : GPS+GLO Serial Number : 199909123 Firmware Version : 6.5 Elevation Cutoff Setting : 0.0 deg Date Installed : 2001-01-23T17:00Z Date Removed : 2008-06-26T09:48Z Temperature Stabiliz. : none Additional Information : 3.3 Receiver Type : JPS EGGDT Satellite System : GPS+GLO Serial Number : LT2078 Firmware Version : 2.7.0 Elevation Cutoff Setting : 0.0 deg Date Installed : 2008-06-27T14:54Z Date Removed : CCYY-MM-DDThh:mmZ Temperature Stabiliz. : none Additional Information : 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS+GLO+GAL+BDS+QZSS+SBAS) Serial Number : (A20, but note the first A5 is used in SINEX) Firmware Version : (A11) Elevation Cutoff Setting : (deg) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : (multiple lines) 4. GNSS Antenna Information 4.1 Antenna Type : AOAD/M_T JPLA Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : JPLA Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 1993-04-17T00:00Z Date Removed : 2012-07-07T00:10Z Additional Information : none 4.2 Antenna Type : AOAD/M_T NONE Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : NONE Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2012-07-07T00:10Z Date Removed : 2012-07-21T23:15Z Additional Information : radome temporarily removed to facilitate : a NOAA/NGS site survey and to support : IGS activities regarding in-situ calibrations. : antenna amplifier failed antenna swap needed 4.3 Antenna Type : TRM29659.00 NONE Serial Number : 0220135750 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : NONE Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2012-07-24T17:35Z Date Removed : 2012-08-02T11:15Z Additional Information : temporary antenna installed : failed AOA/M_T antenna repaired : Trimble antenna removed 4.4 Antenna Type : AOAD/M_T NONE Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : NONE Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2012-08-07T13:19Z Date Removed : 2012-11-15T17:10Z Additional Information : antenna received new amplifier : AOA antenna reinstalled on monument 4.5 Antenna Type : AOAD/M_T NONE Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : NONE Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2012-11-15T17:10Z Date Removed : 2012-12-13T18:00Z Additional Information : the antenna once again failed : a new amplifier was installed 4.6 Antenna Type : AOAD/M_T JPLA Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : JPLA Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2012-12-13T18:28Z Date Removed : 2013-01-30T17:00Z Additional Information : JPLA dome reinstalled 4.7 Antenna Type : AOAD/M_T NONE Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : NONE Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2013-01-30T17:00Z Date Removed : 2013-01-30T18:15Z Additional Information : JPLA dome removed. : See section 10.5 for additional information. 4.8 Antenna Type : AOAD/M_T JPLA Serial Number : 129 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0614 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 degrees/no offset deg Antenna Radome Type : JPLA Radome Serial Number : none Antenna Cable Type : Times RG-214/u Antenna Cable Length : Date Installed : 2013-01-30T18:15Z Date Removed : CCYY-MM-DDThh:mmZ Additional Information : JPLA dome reinstalled. 4.x Antenna Type : (A20, from rcvr_ant.tab; see instructions) Serial Number : (A*, but note the first A5 is used in SINEX) Antenna Reference Point : (BPA/BCR/XXX from "antenna.gra"; see instr.) Marker->ARP Up Ecc. (m) : (F8.4) Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : (deg; + is clockwise/east) Antenna Radome Type : (A4 from rcvr_ant.tab; see instructions) Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 5. Surveyed Local Ties 5.1 Tied Marker Name : CDP Station 7105 Tied Marker Usage : SLR Tied Marker CDP Number : 7105 Tied Marker DOMES Number : 40451M105 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : -54.231 dy (m) : -97.007 dz (m) : -93.864 Accuracy (mm) : 2 mm Survey method : conventional optical/electronic Date Measured : 2001-06-01T00:00Z Additional Information : Local survey by HTSI. Contact Jim Long at : jim.long@honeywell-tsi.com for more information : Marker is occupied by SLR system MOBLAS 7 : Exact date in June 2001 unknown 5.2 Tied Marker Name : SGP 7108 Tied Marker Usage : VLBI Tied Marker CDP Number : 7108 Tied Marker DOMES Number : 40451M125 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : 20.895 dy (m) : 19.754 dz (m) : 16.646 Accuracy (mm) : 2 mm Survey method : conventional optical/electronic Date Measured : 1998-12-01T00:00Z Additional Information : Local survey by HTSI. Contact Jim Long at : jim.long@honeywell-tsi.com for more information : Marker is occupied by mobile VLBI system MV-3 : Exact date in December 1998 unknown 5.x Tied Marker Name : Tied Marker Usage : (SLR/VLBI/LOCAL CONTROL/FOOTPRINT/etc) Tied Marker CDP Number : (A4) Tied Marker DOMES Number : (A9) Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : (m) dy (m) : (m) dz (m) : (m) Accuracy (mm) : (mm) Survey method : (GPS CAMPAIGN/TRILATERATION/TRIANGULATION/etc) Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 6. Frequency Standard 6.1 Standard Type : EXTERNAL H-MASER Input Frequency : 5 MHz Effective Dates : 1999-04-22/CCYY-MM-DD Notes : NR-Series 6.2 Standard Type : EXTERNAL H-MASER Input Frequency : 5 MHz Effective Dates : 2011-03-02/CCYY-MM-DD Notes : a Sigma Tau Maser 6.x Standard Type : (INTERNAL or EXTERNAL H-MASER/CESIUM/etc) Input Frequency : (if external) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 7. Collocation Information 7.1 Instrumentation Type : SLR Status : MOBILE Effective Dates : 1981-03-01/CCYY-MM-DD Notes : NASA SLR MOBLAS 7 , ILRS Station GODL 7.2 Instrumentation Type : VLBI Status : MOBILE Effective Dates : 1993-01-01/CCYY-MM-DD Notes : NASA Mobile VLBI system MV-3 : Exact date in 1993 unknown 7.3 Instrumentation Type : DORIS Status : PERMANENT Effective Dates : 2000-05-01/CCYY-MM-DD Notes : IDS Station GREB : Exact date in May 2000 unknown 7.x Instrumentation Type : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/TIME/etc) Status : (PERMANENT/MOBILE) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8. Meteorological Instrumentation 8.1.1 Humidity Sensor Model : MET-3 Manufacturer : Paroscientific Serial Number : 70726 Data Sampling Interval : programmable sec Accuracy (% rel h) : =/- 2 Aspiration : NATURAL Height Diff to Ant : 4.5 m Calibration date : 2001-03-01 Effective Dates : 2002-05-02/CCYY-MM-DD Notes : 8.1.x Humidity Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy (% rel h) : (% rel h) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.2.x Pressure Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (hPa) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.3.x Temp. Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (deg C) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.4.x Water Vapor Radiometer : Manufacturer : Serial Number : Distance to Antenna : (m) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.5.x Other Instrumentation : (multiple lines) 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.1 Radio Interferences : None Observed Degradations : None Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : 9.1.x Radio Interferences : (TV/CELL PHONE ANTENNA/RADAR/etc) Observed Degradations : (SN RATIO/DATA GAPS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.2.x Multipath Sources : (METAL ROOF/DOME/VLBI ANTENNA/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.3.x Signal Obstructions : (TREES/BUILDINGS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 10. Local Episodic Effects Possibly Affecting Data Quality 10.1 Date : 2002-11-11/ 2003-1-17 Event : Large crane NE of Monument 10.2 Date : 2009-09-30/2009-09-30 Event : Radome removed/replaced for survey : (16:49-19:55UTC) 10.3 Date : 2012-07-09/2012-07-09 Event : NGS running levels to the choke ring. : There may be some temporary masking of the : satellites while work is being done around the : antenna. 10.4 Date : 2012-07-21/2012-08-07 Event : LNA of AOA antenna failed while the in-situ : IGS dome calibration experiment was in process : (dome removed). A temporary Trimbe antenna was : installed while the AOA antenna was repaired. 10.5 Date : 2013-01-30/2013-01-30 Event : Dome was removed from 17:00 to 18:15 UTC for : re-installation of the circulation fan, : charcoal, and sealing of dome base. 10.6 Date : 2016-11-30/2016-12-09 Event : nearby construction vehicles and activity from : Nov30-Dec9 2016. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : Honeywell Technology Solutions Inc. Preferred Abbreviation : HTSI Mailing Address : Goddard Corporate Park : 7515 Mission Drive : Lanham, MD 20706 Primary Contact Contact Name : Irv Diegel Telephone (primary) : 301-805-3959 Telephone (secondary) : Fax : 301-805-3974 E-mail : Irv.Diegel@honeywell.com Secondary Contact Contact Name : Mark Evangelista Telephone (primary) : 301-805-3968 Telephone (secondary) : 301-286-3877 / 301-286-0811 Fax : 301-805-3974 E-mail : Mark.Evangelista@honeywell.com Additional Information : 12. Responsible Agency (if different from 11.) Agency : Jet Propulsion Laboratory Preferred Abbreviation : JPL Mailing Address : 4800 Oak Grove Drive : Pasadena, CA USA Primary Contact Contact Name : Dave Stowers Telephone (primary) : 818-354-7055 Telephone (secondary) : Fax : 818-393-4965 E-mail : dstowers@jpl.nasa.gov Secondary Contact Contact Name : Kevin Miller Telephone (primary) : 818-393-6046 Telephone (secondary) : Fax : 818-393-5546 E-mail : Kevin.J.Miller@jpl.nasa.gov Additional Information : 13. More Information Primary Data Center : CDDIS Secondary Data Center : JPL URL for More Information : http://cddisa.gsfc.nasa.gov Hardcopy on File Site Map : Yes Site Diagram : Yes Horizon Mask : Yes Monument Description : Yes Site Pictures : Yes Additional Information : Antenna Graphics with Dimensions AOAD/M_T ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 BPA=ARP