NPLD00GBR Site Information Form (site log v2.0)
International GNSS Service
See Instructions at:
https://files.igs.org/pub/station/general/sitelog_instr_v2.0.txt
0. Form
Prepared by (full name) : Mr. Peter Whibberley
Date Prepared : 2007-12-14
Report Type : UPDATE
If Update:
Previous Site Log : npld00gbr_20061207.log
Modified/Added Sections : 11, 13
1. Site Identification of the GNSS Monument
Site Name : Teddington
Nine Character ID : NPLD00GBR
Monument Inscription : NPLD
IERS DOMES Number : 13234M003
CDP Number : (A4)
Monument Description : STEEL BOLT
Height of the Monument : (m)
Monument Foundation : ROOF
Foundation Depth : (m)
Marker Description : (CHISELLED CROSS/DIVOT/BRASS NAIL/etc)
Date Installed : 2000-08-15T12:00Z
Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc)
Bedrock Type : (IGNEOUS/METAMORPHIC/SEDIMENTARY)
Bedrock Condition : (FRESH/JOINTED/WEATHERED)
Fracture Spacing : (0 cm/1-10 cm/11-50 cm/51-200 cm/over 200 cm)
Fault zones nearby : NO
Distance/activity : (multiple lines)
Additional Information : centre of top of bolt through steel railing,
: NE corner of liftshaft roof, Building 2.
: Note that the same receiver was previously
: used for different monuments as listed here -
: 20-AUG-1997-07-SEP-1998, used unlabelled
: monument
: 07-SEP-1998 - 15-AUG-2000, moved to monument
: NPLB 13234M002.
: 15-AUG-2000 - present, moved to monument
: NPLD 13234M003.
2. Site Location Information
City or Town : Teddington
State or Province : Greater London
Country or Region : GBR
Tectonic Plate : EURASIAN
Approximate Position (ITRF)
X coordinate (m) : 3985500.414
Y coordinate (m) : -23625.493
Z coordinate (m) : 4962941.695
Latitude (N is +) : +512515.53
Longitude (E is +) : -0002022.69
Elevation (m,ellips.) : 72.7
Additional Information : This location estimate is from Gipsy on
: NPLD3400.00O.
: The antenna offset has been added.
: Previous NPLB 13234M002 monument position:
: 3985502.5969, -23625.5546, 4962941.9106
3. GNSS Receiver Information
3.1 Receiver Type : ASHTECH Z-XII3T
Satellite System : GPS
Serial Number : LP0Z962
Firmware Version : 1I08
Elevation Cutoff Setting : 0 deg
Date Installed : 1997-08-20T12:00Z
Date Removed : 2003-07-03T12:00Z
Temperature Stabiliz. : (deg C) +/- 2.0
Additional Information : Prior to March 2004, receiver was listed as
: ASHTECH Z-XII3 in site logs, but receiver
: was an ASHTECH Z-XII3T
3.2 Receiver Type : ASHTECH Z-XII3T
Satellite System : GPS
Serial Number : LP0Z962
Firmware Version : 1L01
Elevation Cutoff Setting : 0 deg
Date Installed : 2003-07-03T12:00Z
Date Removed : 2007-12-15
Temperature Stabiliz. : (deg C) +/- 2.0
Additional Information : Prior to March 2004, receiver was listed as
: ASHTECH Z-XII3 in site logs, but receiver
: was an ASHTECH Z-XII3T
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 : AOAD/M_T NONE
Serial Number : 340
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0796
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 : NONE
Antenna Cable Type : Andrews phase-stabilised FSJ1-50A
Antenna Cable Length : 30 m
Date Installed : 2000-08-15T12:00Z
Date Removed : 2007-12-15
Additional Information : Moved from monument NPLB to NPLD, for better
: mechanical stability.
: A levelling mount is used with a 79.63mm tall
: spike above the monument point.
: Antenna cable is 30m of phase-stabilised
: Andrews FSJ1-50A, delay =
: (122.15+-0.1)ns (measured, 15-AUG-2000)
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 H-MASER
Input Frequency : 5 MHz
Effective Dates : 1997-08-20/1998-07-13
Notes : HM2, a Sigma Tau active H maser.
: It is the source of UTC(NPL)
6.2 Standard Type : EXTERNAL H-MASER
Input Frequency : 5 MHz
Effective Dates : 1998-07-13/2006-10-26
Notes : HM1, a Sigma Tau active H maser.
: It is the source of UTC(NPL).
: HM2 replaced by HM1 for UTC(NPL) following
: malfunction on 11-JUL-1998.
: 1PPS from port C2 of distr. amp. id 182,
: UTC(NPL)-NPLD_1PPS_in = +8433.7 ns
: (15-AUG-2000 to 15-JAN-2001).
: UTC(NPL)-NPLD_1PPS_in = +8426.4 ns
: (15-JAN-2001 onwards).
: 5MHz from port 6 of distr. amp. id 184,
: then quadrupler up to 20MHz.
6.3 Standard Type : EXTERNAL H-MASER
Input Frequency : 10 MHz
Effective Dates : 2006-10-26/CCYY-MM-DD
Notes : HM2, a Datum active H maser.
: It is the source of UTC(NPL).
: UTC(NPL)-NPLD_1PPS_in = +8382.3 ns
: 10MHz multiplied up to 20MHz for receiver
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 : GLONASS
Status : PERMANENT
Effective Dates : 1998-10-21/2001-07-20
Notes : NPLC/NPLE IGEX station, 3SNAV R100-40T with
: TSA-100 3S CR.
7.2 Instrumentation Type : TWSTFT
Status : PERMANENT
Effective Dates : 1997-08-20/CCYY-MM-DD
Notes : Two-way satellite time and frequency
: earth station, NPL1.
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)
9.2.1 Multipath Sources : METAL DOME
Effective Dates : 2000-08-15/CCYY-MM-DD
Additional Information : Copper dome with 2m radius has centre ~10m
: West of NPLD.
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 : National Physical Laboratory
Preferred Abbreviation : NPL
Mailing Address : Hampton Road
: TW11 0LW Teddington
: United Kingdom of Great Britain and Northern
: Ireland (the)
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)
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 : BKG
Secondary Data Center : BEV
URL for More Information : http://www.npl.co.uk/npl/ctm/gnss.html
Hardcopy on File
Site Map : (Y or URL)
Site Diagram : (Y)
Horizon Mask : (Y)
Monument Description : (Y)
Site Pictures : (Y)
Additional Information : (multiple lines)
Antenna Graphics with Dimensions
AOAD/M_T
Dorne Margolin with chokerings (TurboRogue)
+---------+
/ + \ <-- 0.1280 L2
| + | <-- 0.1100 L1
+-----------------+-------------+------------------+ <-- 0.1020 TCR
| |
| |
| |
| |
+-+--------------------------------------------------+-+ <-- 0.0380
+-------------------+-------------+--------------------+ <-- 0.0350 BCR
| |
| |
+------x------+ <-- 0.0 BPA=ARP
<-- 0.3810 -->
ARP: Antenna Reference Point
L1 : L1 Phase Center L2 : L2 Phase Center
