ORBA00BEL Site Information Form (site log) International GNSS Service See Instructions at: https://files.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : gnss_time (time_lab@oma.be) Date Prepared : 2024-09-04 Report Type : UPDATE If Update: Previous Site Log : orba00bel_20230809.log Modified/Added Sections : 4.1, 6.5 1. Site Identification of the GNSS Monument Site Name : Brussels Four Character ID : ORBA Monument Inscription : IERS DOMES Number : 13101M012 CDP Number : (A4) Monument Description : STEEL MAST Height of the Monument : 5 m Monument Foundation : (STEEL RODS, CONCRETE BLOCK, ROOF, etc) Foundation Depth : (m) Marker Description : BRASS NAIL Date Installed : 2015-12-10T00:00Z Geologic Characteristic : SAND Bedrock Type : SEDIMENTARY Bedrock Condition : FRESH Fracture Spacing : 0 cm Fault zones nearby : NO Distance/activity : (multiple lines) Additional Information : (multiple lines) 2. Site Location Information City or Town : Brussels State or Province : Brabant Country : Belgium Tectonic Plate : EURASIAN Approximate Position (ITRF) X coordinate (m) : 4027865.430 Y coordinate (m) : 307009.470 Z coordinate (m) : 4919504.050 Latitude (N is +) : +504753.51 Longitude (E is +) : +0042131.45 Elevation (m,ellips.) : 152.5 Additional Information : (multiple lines) 3. GNSS Receiver Information 3.1 Receiver Type : SEPT POLARX4TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3007657 Firmware Version : 2.9.0 Elevation Cutoff Setting : 0 deg Date Installed : 2015-12-11T00:00Z Date Removed : 2017-01-11T07:00Z Temperature Stabiliz. : 18.0 +/- 0.2 Additional Information : Receiver was calibrated by CNES (Sept. 2015). : Delay P1: 32.5 ns : Delay P2: 33.4 ns : Delay E1: 33.5 ns 3.2 Receiver Type : SEPT POLARX4TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3007657 Firmware Version : 2.9.6 Elevation Cutoff Setting : 0 deg Date Installed : 2017-01-11T07:00Z Date Removed : 2022-10-10T11:20Z Temperature Stabiliz. : 18.0 +/- 0.2 Additional Information : Receiver was calibrated by CNES (Sept. 2015). : Delay P1: 32.5 ns : Delay P2: 33.4 ns : Delay E1: 33.5 ns 3.3 Receiver Type : SEPT POLARX4TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3007657 Firmware Version : 2.9.6 Elevation Cutoff Setting : 0 deg Date Installed : 2022-10-10T11:20Z Date Removed : CCYY-MM-DDThh:mmZ Temperature Stabiliz. : 22.0 +/- 0.2 Additional Information : Receiver was calibrated by CNES (Sept. 2015). : Delay P1: 32.5 ns : Delay P2: 33.4 ns : Delay E1: 33.5 ns 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS+GLO+GAL+BDS+QZSS+IRNSS+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 : SEPCHOKE_MC NONE Serial Number : 5467 Antenna Reference Point : BAM Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : RG214 Antenna Cable Length : 30 m Date Installed : 2015-12-10T00:00Z Date Removed : 2017-08-03T14:00Z Additional Information : Cable was calibrated by CNES (Sept. 2015). 4.2 Antenna Type : TRM59800.00 NONE Serial Number : 5115354112 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : ANDREW heliax LDF2-50A Antenna Cable Length : 36.65 m Date Installed : 2017-08-03T14:00Z Date Removed : 2017-08-09T15:00Z Additional Information : position change, using DOME number 13101M009 4.3 Antenna Type : SEPCHOKE_MC NONE Serial Number : 5467 Antenna Reference Point : BAM Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : RG214 Antenna Cable Length : 29.50 m Date Installed : 2017-08-09T18:00Z Date Removed : 2017-08-09T18:05Z Additional Information : Cable was calibrated by ORB: Delay=149.2 ns 4.4 Antenna Type : SEPCHOKE_MC NONE Serial Number : 5467 Antenna Reference Point : BAM Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : RG214 Antenna Cable Length : 29.50 m Date Installed : 2017-08-09T20:00Z Date Removed : 2017-08-10T20:00Z Additional Information : Cable was calibrated by ORB: delay=149.2 ns : Surge protection device, dly: L2 553, L1 525 ps : Total delay cable + SPD + adapter: 149.8 ns 4.5 Antenna Type : SEPCHOKE_MC SPKE Serial Number : 5467 Antenna Reference Point : BAM Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SPKE Radome Serial Number : Antenna Cable Type : RG214 Antenna Cable Length : 29.50 m Date Installed : 2017-08-10T20:00Z Date Removed : CCYY-MM-DDThh:mmZ Additional Information : Cable was calibrated by ORB: delay=149.2 ns : Surge protection device, dly: L2 553, L1 525 ps : Total delay cable + SPD + adapter: 149.8 ns 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.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 CH1-75A MASER Input Frequency : 10 MHz Effective Dates : 2015-12-11/2016-11-07 Notes : The 5MHz output of the CH1-75A (maser3) passes : an amplifier HP5087A and then is used as input : to a SpectraTime picoStepper. The output of : this phase stepper (equal to UTC(ORB)) is used : as an input to the receiver. 6.2 Standard Type : EXTERNAL 5071A CESIUM Input Frequency : 10 MHz Effective Dates : 2016-11-07/2016-11-17 Notes : The 5MHz output of the CESIUM 5071A (ces3) : passes an amplifier HP5087A and then is used as : input to a SpectraTime femtoStepper. The output : of this phase stepper (equal to UTC(ORB)) is : used as an input to the receiver. 6.3 Standard Type : EXTERNAL CH1-75A MASER Input Frequency : 10 MHz Effective Dates : 2016-11-17/2017-03-24 Notes : The 5MHz output of the CH1-75A (maser3) passes : an amplifier HP5087A and then is used as input : to a SpectraTime femtoStepper. The output of : this phase stepper (equal to UTC(ORB)) is used : as an input to the receiver. : REFDLY = 153.8 ns 6.4 Standard Type : EXTERNAL CH1-75A MASER Input Frequency : 10 MHz Effective Dates : 2017-03-24/2022-10-10 Notes : The 5MHz output of the CH1-75A (maser3) passes : an amplifier HP5087A and then is used as input : to a SpectraTime femtoStepper. The output of : this phase stepper (equal to UTC(ORB)) is used : as an input to the receiver. : REFDLY = 157.9 ns 6.5 Standard Type : EXTERNAL IMASER 3000 Input Frequency : 10 MHz Effective Dates : 2022-10-10/CCYY-MM-DD Notes : The 10MHz output of the IMASER 3000 (maser4) is : used as input to a SpectraTime femtoStepper. The : output of this phase stepper (equal to UTC(ORB)) : is used as an input to the receiver. : REFDLY: 157.8 ns 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 : SEISMOMETER Status : PERMANENT Effective Dates : 1993-10-20/CCYY-MM-DD Notes : (multiple lines) 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.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.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.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : Royal Observatory of Belgium Preferred Abbreviation : ROB Mailing Address : Avenue Circulaire 3 : 1180 Uccle : Belgium Primary Contact Contact Name : gnss_time Telephone (primary) : Telephone (secondary) : Fax : E-mail : time_lab@oma.be Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 12. Responsible Agency (if different from 11.) Agency : (multiple lines) Preferred Abbreviation : (A10) Mailing Address : (multiple lines) Primary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 13. More Information Primary Data Center : ROB Secondary Data Center : URL for More Information : Hardcopy on File Site Map : (Y or URL) Site Diagram : (Y or URL) Horizon Mask : (Y or URL) Monument Description : (Y or URL) Site Pictures : (Y or URL) Additional Information : (multiple lines) Antenna Graphics with Dimensions (insert text graphic from file antenna.gra)