Site Information for Delft

Delft

GNSS Laboratory of the Delft University of Technology, Department Geoscience and Remote Sensing, on the former Geodesy building, Thijsseweg 11, 2629 JA Delft, The Netherlands.

On-site contact: Hans van der Marel, TUD/CITG/GRS

GNSS Instrument(s)

Name	Marker	Receiver	Antenna	Operator	Network	Start date	End date
delf	13502M004	SEPT POLARX5E	SEPCHOKE_B3E6	TUD/CITG/GRS,NSGI	EPN,AGRS.NL	1994-12-30
dlft	13502M006	JPS LEGACY	JPSREGANT_DD_E	TUD/CITG/GRS	IGS	1998-08-17	2012-02-14
dlf1	13502M009	TRIMBLE ALLOY	LEIAR25.R3	TUD/CITG/GRS	IGS	2011-04-15
dlf2	13502M009	JAVAD TRE_G3TH DELTA	LEIAR25.R3	TUD/CITG/GRS,JAXA	JAXA	2012-04-06	2017-12-14
dlf3	13502M009	JAVAD TRE_G3TH DELTA	LEIAR25.R3	TUD/CITG/GRS,JPL	GDGPS	2002-09-04	2019-03-25
dlf4	13502M007	SEPT POLARX2	LEIAT504	TUD/CITG/GRS	EDCN	2001-11-15	2010-12-05
dlf5	13502M009	SEPT POLARX2	LEIAR25.R3	TUD/CITG/GRS	EDCN	2004-06-18	2019-02-16
dlf5x	13502M007	SEPT POLARX2	LEIAR25.R3	TUD/CITG/GRS	EDCN	2004-06-18	2011-02-22
dlf9	13502M007	TRIMBLE NETR9	LEIAR25.R3	TUD/CITG/GRS	NONE	2011-02-22	2011-04-15
vslf	31	SEPT POLARX4TR	TPSCR.G3	VSL	NONE	2012-06-04

Markers

ID	Name	dX	dY	dZ	Instruments	Installed	Removed
13502M001	BIG ASTRON. PILLAR	0.0000	0.0000	0.0000
13502M002	GPS EUREF 89 (MARK # 18)	-0.2220	11.6050	-0.5370
13502M003	GPS MARK # 15	-1.0110	-2.7060	1.0600
13502M004	GPS MARK # 16	-1.8180	-0.9580	1.5840	delf
13502M005	GPS MARK # 19	1.5260	9.5330	-1.7740
13502M006	GPS MARK # 20	7.6730	-1.8940	-5.8960	dlft
13502M007	GPS MARK # 21	10.1900	-8.0380	-7.4890	dlf4,dlf5x,dlf9
13502M009X	GPS MARK # 02 (AKA # 22)	8.5715	-8.9207	-4.1662			2011-04-15T10:00Z
13502M009	GPS MARK # 02 (AKA # 22)	8.5932	-8.9176	-4.1913	dlf1,dlf2,dlf3,dlf5	2011-04-15T10:00Z
13502M010	GPS MARK # 04 (AKA # 23)	4.2855	5.3092	-1.6755			2004-10-01T09:00Z
31	GPS MARK # 31	-99.999	-99.999	-99.999	vslf

Meteo sensors

Installed	week/d doy	Removed	week/d doy	Pressure	Temperature	Humidty
1994-04-19T00:00Z	0745/2 109	2006-05-03T00:00Z	1373/3 123	VAISALA PTB200A	VAISALA HMP233	VAISALA HMP233

Pictures

Delft_NMI_Panorama_3parts

Delft_NMI_Panorama_3sm

Delft_NMI_Panorama_notext

Notes

1997-03-25T00:00Z 0898/2 084 -: Cell phone antenna were installed on the South tower, 100 meters from the GNSS antennae, transmitting in a 240 degrees sector. The GNSS antennae are located in a 120 degrees sector not covered by the cell phone (GSM) system. Test with a receiver at 5 meters from the GSM antenna have shown no degradation of the GPS, so it is very unlikely that the GPS observations of the North tower are affected and we have so-far observed no degradation at all.
2003-09-01T00:00Z 1234/1 244 - 2005-01-31T00:00Z 1308/1 031: The department of Geodesy moved to Aerospace Eng. The former Geodesy building has been sold to the Dutch Metrology Institute (NMI) who will move into the building January 2005. Until then the building is empty and is undergoing reconstruction. A deal was made with the new owner to continue the GPS observations during and after the reconstruction. Over the next months all technical installations, inventory, cabling, piping and internal walls were removed, resulting in a completely empty and bare building w/o water, heating and electricity. The observatory switched to a temporary power supply and a dedicated Internet connection. Access to the premises restricted working days from 8.00 to 16.00 local time. After Oct 2003 a gradual change southwards of about 1 cm in total on Feb 2004, starting Mar 2004 the movement reversed in the North direction. Over Jan/Feb 2004 a 3-4 mm movement in East-West direction, stable again after Feb 2004. Signs of increased scatter in East-West direction since Apr 2004.
2004-04-13T00:00Z 1266/2 104 -: The stairs to the observation platform have been removed and a temporary roof was installed over the former stairs (now a vertical shaft).
2004-05-10T02:12Z 1270/1 131 -: Antenna cable of Trimble 4700 disconnected by vandals resulting in a loss of several hours of data. No other dammage or stolen items from the observatory. Receiver tracking after the event became very poor, which was noticed because we lost the internet connection next day. Receiver tracking became again nominal after the change over from Saterday/Sunday 15/16 May.
2004-05-11T06:30Z 1270/2 132 - 2004-05-14T12:00Z 1270/5 135: The Internet glasfibre cable outside the building was hit by a pile and Internet connection was lost. Repairs were effectuated and the Internet connection was restored on May 14th.
2004-05-29T06:10Z 1272/6 150 - 2004-06-01T08:04Z 1273/2 153: Power failure. This Saterday morning vandals tried to steal coper cables, and nearly electrocuted themselves. Suspects were arrested several weeks after this event. Power restored again on Monday morning.
2004-06-24T14:00Z 1276/4 176 - 2004-07-06T08:00Z 1278/2 188: During a storm the temporary roof installed on April 13 was blown away, partly blocking low elevation signals to the South. Two antenna cables were damaged, but no other damages. The contractor promissed to clean-up and restore the roof a.s.a.p., but actually nothing happened until 5 or 6 July when the former roof was moved a little reducing the effects of the blockage somewhat.
2004-06-24T14:00Z 1276/4 176 - 2004-12-15T09:00Z 1301/3 350: A temporary construction lift was attached to the North tower on 2004 Jun 24-30 (date not known exactly), where all the antenna are. The lift is on the North side and connected firmly to the building. About 75 cm of the metal tower is above the concrete balustrade, about 4 meters to the West from the Trimble 4700 antenna. On June 30 we noticed a change in the amount of data that is tracked. The temporary lift was removed somewhere in the beginning of December 2004 (date not known exactly).
2011-04-15T10:00Z 1631/5 105 -: Marker 13502M009 had to be temporarily removed and was reinstalled later at more or less the same position. This resulted in a move of 32.7 mm to the South, 1.4 mm to the East and 6.3 mm Down. The shift is: dX=0.0217, dY=0.0031, dZ=-0.0251 in ECEF, or dN=-0.0327, dE=0.0014, dU= -0.0063 in a local frame. The old marker has been renamed to 13502M009X. At the same time the Ahstech Chokering antenna was replaced by a LEICA AR25.R3 chokering. The antenna cable run consists of a 30 m LMR400 outdoors, a Huber-Suhner type 3402.17.A surge protector, 10 m LMR400 indoors, GPS Networking Inc. 4-way high-isolation antenna splitter N HI AL DCB S1X4-N/ 12/ 220, with 17 dB gain and 12 V DC feed to the antenna, and short 3 m cables to the each receiver.
2011-04-15T10:00Z 1631/5 105 -: The antenne for the Eurocontrol Data Collection Network (EDCN) has been moved from marker 13502M007 to marker 13502M009.
2013-11-01T13:05Z 1764/5 305 -: The antenna splitter connecting the LEIAR25.R3 LEIT (marker 13502M009) to DLF1, DLF2, DLF3 and DLF5 has been replaced on November 1, 2013, between 13:50-13:10 UTC. The new splitter is a Networked High Isolated Amplified DC Blocked 1x8 splitter from GPS Networking (NHIALDCBS1X8-T/12/220, S/N 76256). It replaces a 1x4 splitter from the same brand (NHIALDCBS1X4-N/12/220, S/N 53494). The antenna cable run now consists of a 30 m LMR400 outdoors, a Huber-Suhner type 3402.17.A surge protector, 10 m LMR400 indoors, GPS Networking Inc. 8-way high-isolation antenna splitter N HI AL DCB S1X8-T/ 12/ 220, with 14 dB gain and 12 V DC feed to the antenna, and 3 m flexible RG223 type cables from the splitter to the each receiver.
2015-08-03T18:15Z 1856/1 215 - 2015-08-04T11:40Z 1856/2 216: The antenna cable of the LEIAR25.R3 LEIT antenna on marker 13502M009 has been replaced (DLF1, DLF2, DLF3 and DLF5). In order to change the antenna cable the antenna had to be unbolted from the monument; after the cable replacement the same antenna was reattached to the monument in exactly the same position. The bronze alloy retaining bolt has been replaced by a stainless steel bolt. The new antenna cable is of the same type LMR400 and length. The antenna was in good working order and was cleaned. The antenna was operational again on Aug 4 2015, 11:39:28 UTC. No data is available from Aug 3 2015, 18:15:21 until Aug 4 2015, 11:39:28 UTC.
2019-07-28T02:54Z 2064/0 209 - 2019-08-05T14:00Z 2065/1 217: The antenna cable of the LEIAR25.R3 LEIT antenna had developed a fault Sunday 28 July around 02:54 UTC resulting in a total loss of data for all connected receivers (DLF100NLD, DLF500NLD , DLF600NLD, DLF700NLD, DLF800NLD, DLF900NLD and DLFV00NLD). On 5 August, 13:30 UTC, the antenna was temporarily removed, and an inspection revealed that the connector had developed a fault, but that the antenna itself was ok. The antenna cable shortened by 2 meters and a new connector was installed. The antenna and serial number are the same as was used before. The antenna and connected receivers were operational again on August 5, 2019, around 14:00 UTC.

Active instruments

DELF (Delft)

Marker ID: 13502M004
Operator: AGRS.NL (KAD,MD,TUD)
Log file: delf00nld_20230630.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
1994-12-30T13:00Z	0781/5 364	1995-12-26T23:59Z	0833/2 360	ROGUE SNR-8000	175	3.2.32.1
1995-12-27T17:22Z	0833/3 361	1997-11-20T16:50Z	0932/4 324	ROGUE SNR-12 RM	222	3.2.32.1
1997-11-20T17:06Z	0932/4 324	1999-07-08T14:30Z	1017/4 189	ROGUE SNR-12 RM	211	3.2.32.1
1999-07-08T15:15Z	1017/4 189	2000-07-23T06:30Z	1072/0 205	ROGUE SNR-12 RM	211	3.2.32.9
2000-07-23T07:00Z	1072/0 205	2002-11-18T07:00Z	1193/1 322	TRIMBLE 4700	96517	1.20
2002-11-18T10:30Z	1193/1 322	2015-11-27T00:00Z	1872/5 331	TRIMBLE 4700	96517	N1.30/S0.00
2015-11-27T17:00Z	1872/5 331	2019-03-29T10:16Z	2046/5 088	TPS ODYSSEY_E	323-0386	3.5 Mar,16,2011 p1
2019-03-29T10:17Z	2046/5 088	2022-02-24T10:55Z	2198/4 055	TPS ODYSSEY_E	323-0386	3.5 Feb,01,2019 p5
2022-02-24T12:00Z	2198/4 055	2023-06-30T09:25Z	2268/5 181	SEPT POLARX5E	3048221	5.4.0
2023-06-30T09:25Z	2268/5 181			SEPT POLARX5E	3048221	5.5.0

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
1994-12-30T13:00Z	0781/5 364	1996-03-08T14:59Z	0843/5 068	AOAD/M_T	NONE	177	0.000	AOAD-M_T_RFI____NONE_177.atx
1996-03-08T15:00Z	0843/5 068	1996-07-25T09:49Z	0863/4 207	AOAD/M_T	NONE	246	0.000
1996-07-25T09:50Z	0863/4 207	1996-07-30T11:14Z	0864/2 212	AOAD/M_T	NONE	243	0.000
1996-07-30T11:15Z	0864/2 212	1996-08-08T13:29Z	0865/4 221	AOAD/M_T	NONE	177	0.000	AOAD-M_T_RFI____NONE_177.atx
1996-08-08T13:30Z	0865/4 221	2000-07-23T06:30Z	1072/0 205	AOAD/M_T	DUTD	240	0.000
2000-07-23T07:00Z	1072/0 205	2016-07-13T13:30Z	1905/3 195	TRM29659.00	UNAV	93258	0.000
2016-07-13T13:30Z	1905/3 195	2022-02-24T11:00Z	2198/4 055	TRM29659.00	UNAV	0220314044	0.050	TRM29659.00_____UNAV_0220314044.atx
2022-02-24T12:00Z	2198/4 055			SEPCHOKE_B3E6	SPKE	5741	0.000	SEPCHOKE_B3E6___SPKE_5741.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
1994-12-30T00:00Z	0781/5 364			INTERNAL

Notes

2016-07-13T13:30Z 1905/3 195 - 2022-02-24T11:00Z 2198/4 055: A 50 mm spacer was inserted between the antenna and marker, flush with inner ring in BPA. BPA has been seriously corroded due to salt-water conditions in previous installation.
2019-12-04T00:00Z 2082/3 338 - 2020-06-24T00:00Z 2111/3 176: The radome on the TRM29659.00 was lost sometime in the preriod between December 2019 and June 2020. The exact date is not known. The antenna designation was not changed because (i) the effect of the radome on the calibration appears to be very small, (ii) the change in antenna type calibration would introduce another step in the time series, and (iii) the exact date is not known.
2022-02-24T12:00Z 2198/4 055 -: The antenna cable on the roof was replaced by 15 meter PRO PUR coaxkabel Low loss N-m to N-m (RG214), from the antenna to the HUBER-SUHNER 34U2.17A protector. The 8 m cable inside the building between the protector and receiver was not changed.

DLF1 (Delft GNSS)

Marker ID: 13502M009
Operator: DELFT UNIVERSITY OF TECHNOLOGY
Log file: dlf100nld_20230424.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2011-04-15T10:00Z	1631/5 105	2011-06-22T11:20Z	1641/3 173	TRIMBLE NETR9	5039K70764	4.22
2011-06-22T11:20Z	1641/3 173	2012-02-01T12:32Z	1673/3 032	TRIMBLE NETR9	5039K70764	4.42
2012-02-01T12:32Z	1673/3 032	2012-05-03T11:30Z	1686/4 124	TRIMBLE NETR9	5039K70764	4.43
2012-05-03T11:30Z	1686/4 124	2012-05-08T11:05Z	1687/2 129	TRIMBLE NETR9	5039K70764	4.46
2012-05-08T11:05Z	1687/2 129	2013-02-18T22:15Z	1728/1 049	TRIMBLE NETR9	5039K70764	4.60
2013-02-18T22:15Z	1728/1 049	2013-05-09T06:05Z	1739/4 129	TRIMBLE NETR9	5039K70764	4.70
2013-05-09T06:05Z	1739/4 129	2013-08-12T14:15Z	1753/1 224	TRIMBLE NETR9	5039K70764	4.80
2013-08-12T14:15Z	1753/1 224	2015-06-18T21:30Z	1849/4 169	TRIMBLE NETR9	5039K70764	4.81
2015-06-18T21:30Z	1849/4 169	2015-07-13T17:10Z	1853/1 194	TRIMBLE NETR9	5039K70764	5.01
2015-07-13T17:10Z	1853/1 194	2016-07-20T16:15Z	1906/3 202	TRIMBLE NETR9	5039K70764	5.03
2016-07-20T16:15Z	1906/3 202	2016-12-21T18:43Z	1928/3 356	TRIMBLE NETR9	5039K70764	5.14
2016-12-21T18:43Z	1928/3 356	2017-05-28T09:12Z	1951/0 148	TRIMBLE NETR9	5039K70764	5.15
2017-05-28T09:12Z	1951/0 148	2018-10-29T14:02Z	2025/1 302	TRIMBLE NETR9	5039K70764	5.22
2018-10-29T14:03Z	2025/1 302	2019-10-26T15:23Z	2076/6 299	TRIMBLE NETR9	5039K70764	5.37
2019-10-26T15:23Z	2076/6 299	2020-05-16T15:15Z	2105/6 137	TRIMBLE NETR9	5039K70764	5.43
2020-05-16T15:15Z	2105/6 137	2023-04-24T12:15Z	2259/1 114	TRIMBLE NETR9	5039K70764	5.45
2023-04-24T12:15Z	2259/1 114			TRIMBLE ALLOY	6235R40294	6.20

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2011-04-15T10:00Z	1631/5 105			LEIAR25.R3	LEIT	10030006	0.0000	LEIAR25.R3______LEIT_10030006.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2011-04-15T10:00Z	1631/5 105	2011-06-22T11:20Z	1641/3 173	INTERNAL
2011-06-22T11:20Z	1641/3 173			EXTERNAL CESIUM + RX_CLOCK_STEERING_ON

Notes

2019-07-28T02:54Z 2064/0 209 - 2019-08-05T14:00Z 2065/1 217: The antenna cable of the LEIAR25.R3 LEIT antenna had developed a fault Sunday 28 July around 02:54 UTC resulting in a total loss of data for all connected receivers (DLF100NLD, DLF500NLD , DLF600NLD, DLF700NLD, DLF800NLD, DLF900NLD and DLFV00NLD). On 5 August, 13:30 UTC, the antenna was temporarily removed, and an inspection revealed that the connector had developed a fault, but that the antenna itself was ok. The antenna cable shortened by 2 meters and a new connector was installed. The antenna and serial number are the same as was used before. The antenna and connected receivers were operational again on August 5, 2019, around 14:00 UTC.
2015-08-03T18:15Z 1856/1 215 - 2015-08-04T11:40Z 1856/2 216: The antenna cable of the LEIAR25.R3 LEIT antenna (DLF1) has been replaced. In order to change the antenna cable the antenna had to be detached from the monument; after the cable replacement the same antenna was reattached to the monument in exactly the same position. The bronze alloy retaining bolt has been replaced by a stainless steel bolt. The new antenna cable is of the same type LMR400 and length. The antenna was in good working order and was cleaned. The antenna was operational again on Aug 4 2015, 11:39:28 UTC. No data is available from Aug 3 2015, 18:15:21 until Aug 4 2015, 11:39:28 UTC.
2015-07-01T00:00Z 1851/3 182 -: DLF1 has been added to the IGS and EPN networks. See IGS mail IGSSTATION-6225. At the same time DLF1 has been added to the EPN network and routine uploads of RINEX 2 data to BKGI and OLG were started. RINEX 3 data continues to be available from the IGS-MGEX data stores.
2015-03-01T00:00Z 1834/0 060 -: In addition to daily, hourly and high-rate RINEX 3 for all systems, daily RINEX 2 with 30 sec GPS and GLONASS data are available since the start op operation in April 2011. Since 1 March 2015 also hourly RINEX 2 files, with 10 second GPS and GLONASS, are kept.
2012-04-23T10:00Z 1685/1 114 - 2012-05-03T11:18Z 1686/4 124: No data has been logged on account of a disk-full condition.
2012-02-01T15:00Z 1673/3 032 -: DLF1 started streaming NTRIP data to Trimble VRS-NOW.
2011-11-04T14:01Z 1660/5 308 - 2012-02-01T13:00Z 1673/3 032: All data for this period has been lost.
2011-06-22T11:20Z 1641/3 173 -: Receiver was connected to the external CESIUM clock of the NMI. The 10 MHz from the external CESIUM was enabled in the receiver settings from the start. However, clock steering has not been disabled during this period, except fro some brief experimentation, and is currenty on. During some short periods in 2011 clock steering was disabled. So the receiver is running on the external frequency, but the clock is still adjusted using satellite signals. Clock steering will be disabled on a later to be announced moment in 2015.
2011-04-15T10:00Z 1631/5 105 -: All systems (GPS+GLO+GAL+BEI+QZSS+SBAS) are tracked and data is archived in daily 30 sec interval, hourly 10 sec interval and 15 minute high-rate 1 Hz multi GNSS RINEX version 3 files, as well as the raw data in T02 format. The GPS and GLONASS data is kept also as daily 30 second RINEX version 2 files for legacy purposes. Starting 1 March 2015 also hourly RINEX 2 files with 10 second GPS and GLONASS are saved.
2011-04-15T10:00Z 1631/5 105 -: DLF1 is part of the IGS M-GEX network. DLF1 is also intended as a replacement for IGS station DLFT.

VSLF (VSLF)

Marker ID: 31
Operator: VSL

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2012-06-04T00:00Z	1691/1 156			SEPT POLARX4TR	3001395	2.3.3

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2012-06-04T00:00Z	1691/1 156			TPSCR.G3	TPSH	383-1235	0.0000

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2012-06-04T00:00Z	1691/1 156			EXTERNAL CESIUM

Discontinued instruments

DLFT (Delft IGLOS)

Marker ID: 13502M006
Operator: TU DELFT
Log file: dlft_20121101.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
1998-08-17T00:00Z	0971/1 229	1998-10-15T00:00Z	0979/4 288	ASHTECH GG24C	00120	GG00
1998-10-15T00:00Z	0979/4 288	1999-02-17T00:00Z	0997/3 048	ASHTECH GG24C	00163	GG00
1999-02-17T00:00Z	0997/3 048	1999-03-29T00:00Z	1003/1 088	JPS LEGACY	00143	1.4
1999-03-29T00:00Z	1003/1 088	1999-05-09T00:00Z	1009/0 129	JPS LEGACY	00287	1.5 pl3
1999-05-09T00:00Z	1009/0 129	1999-07-06T00:00Z	1017/2 187	JPS LEGACY	00287	1.6 pl2
1999-07-06T00:00Z	1017/2 187	1999-09-17T00:00Z	1027/5 260	JPS LEGACY	00287	1.8 pl2
1999-09-17T00:00Z	1027/5 260	2000-04-21T00:00Z	1058/5 112	JPS LEGACY	00287	1.9 pl6
2000-04-21T00:00Z	1058/5 112	2004-07-17T08:46Z	1279/6 199	JPS LEGACY	00287	2.0 pl5
2004-07-17T13:00Z	1279/6 199	2007-11-07T11:20Z	1452/3 311	JPS LEGACY	00286	2.3 Apr,28,2004 p4
2007-11-07T12:00Z	1452/3 311	2008-03-11T10:00Z	1470/2 071	JPS LEGACY	00286	2.6.0 Oct,24,2007 ob
2008-03-11T10:30Z	1470/2 071	2012-02-14T23:53Z	1675/2 045	JPS LEGACY	00286	2.6.1 Jan,10,2008

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
1998-08-17T00:00Z	0971/1 229	1999-02-17T00:00Z	0997/3 048	ASH700699.L1	NONE	13789	0.1018
1999-02-17T00:00Z	0997/3 048	1999-03-29T00:00Z	1003/1 088	JPSREGANT_SD_E	NONE	00043	0.1000
1999-03-29T00:00Z	1003/1 088	2014-04-16T10:00Z	1788/3 106	JPSREGANT_DD_E	NONE	00077	0.1000	JPSREGANT_DD_ET_NONE_ra0077.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
1998-08-17T00:00Z	0971/1 229	2004-07-22T00:00Z	1280/4 204	INTERNAL
2004-07-22T00:00Z	1280/4 204	2007-11-07T12:00Z	1452/3 311	EXTERNAL OCX
2008-07-01T14:00Z	1486/2 183	2012-02-14T23:53Z	1675/2 045	EXTERNAL CESIUM

Notes

2012-02-14T23:53Z 1675/2 045 -: The receiver/antenna developed a problem and no data has been recorded since 2012-02-15. The station DLFT was discommissioned on 2012-04-16. The antenna will be removed for calibration. Users are adviced to use instead the IGS MGEX station DLF1 on the nearby marker 13502M009.
2011-04-15T10:00Z 1631/5 105 -: DLFT will be decommissioned in near future and replaced by DLF1 on marker 13502M009. Data for DLFT will be available in parallel to DLF1 for a limited period. Please use DLF1 instead of DLFT. DLF1 provides a multiple system (GPS/GLONASS/GALILEO) and frequency (L1/L2/L5) receiver at a lower multipath location.
2004-03-08T15:00Z 1261/1 068 -: Replaced antenna cable (Belden RG8) by LMR-400.

DLF2 (Delft JAXA)

Marker ID: 13502M009
Operator: TUD/CITG/GRS,JAXA

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2012-04-06T14:00Z	1682/5 097	2012-12-28T13:30Z	1720/5 363	JAVAD TRE_G3TH DELTA	00733	3.5.0a0 Feb,01,2012
2012-12-28T13:30Z	1720/5 363	2013-05-15T12:00Z	1740/3 135	JAVAD TRE_G3TH DELTA	00733	3.5.0
2013-05-15T12:00Z	1740/3 135	2017-12-14T00:00Z	1979/4 348	JAVAD TRE_G3TH DELTA	00733	3.5.1

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2011-04-15T10:00Z	1631/5 105			LEIAR25.R3	LEIT	10030006	0.0000	LEIAR25.R3______LEIT_10030006.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2012-04-06T14:00Z	1682/5 097			INTERNAL

Notes

2015-08-03T18:15Z 1856/1 215 - 2015-08-04T11:40Z 1856/2 216: The antenna cable of the LEIAR25.R3 LEIT antenna (DLF2) has been replaced. In order to change the antenna cable the antenna had to be detached from the monument; after the cable replacement the same antenna was reattached to the monument in exactly the same position. The bronze alloy retaining bolt has been replaced by a stainless steel bolt. The new antenna cable is of the same type LMR400 and length. The antenna was in good working order and was cleaned. The antenna was operational again on Aug 4 2015, 11:39:28 UTC. No data is available from Aug 3 2015, 18:15:21 until Aug 4 2015, 11:39:28 UTC.
2012-04-06T14:00Z 1682/5 097 -: This receiver is streaming data directly to JAXA. No raw data or RINEX files are stored at the local data center. For the RINEX data, please contact JAXA directly.

DLF3 (Delft IGDG)

Marker ID: 13502M009
Operator: TUD/CITG/GRS,JPL
Log file: dlf3_20030219.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2002-09-04T00:00Z	1182/3 247	2011-11-10T08:25Z	1661/4 314	ASHTECH Z-XII3	00830	1L00/1D04
2011-11-10T08:35Z	1661/4 314	2019-03-25T08:00Z	2046/1 084	JAVAD TRE_G3TH DELTA	00849	3.2.5 Jan,26,2011

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2002-09-04T00:00Z	1182/3 247	2011-04-15T08:00Z	1631/5 105	ASH700936C_M	SNOW	12114	0.0000	ASH700936C_M____SNOW_12114.atx
2011-04-15T10:00Z	1631/5 105			LEIAR25.R3	LEIT	10030006	0.0000	LEIAR25.R3______LEIT_10030006.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2002-09-04T00:00Z	1182/3 247			INTERNAL

Notes

2015-08-03T18:15Z 1856/1 215 - 2015-08-04T11:40Z 1856/2 216: The antenna cable of the LEIAR25.R3 LEIT antenna (DLF3) has been replaced. In order to change the antenna cable the antenna had to be detached from the monument; after the cable replacement the same antenna was reattached to the monument in exactly the same position. The bronze alloy retaining bolt has been replaced by a stainless steel bolt. The new antenna cable is of the same type LMR400 and length. The antenna was in good working order and was cleaned. The antenna was operational again on Aug 4 2015, 11:39:28 UTC. No data is available from Aug 3 2015, 18:15:21 until Aug 4 2015, 11:39:28 UTC.
2011-11-10T08:30Z 1661/4 314 -: A new receiver and data logger were installed this morning around 8.30 UTC. The old receiver was removed at 8.25 UTC. The data logging with the new receiver started around 8.40. From the outside everything seems to work ok. The receiver is tracking (flashing light indicating that satellites are tracked) and the data logger has the same IP as the old PC. The receiver was initially connected to COM1, but on Nov 17, 2011,9:50 utc, the ethernet port of the javad receiver was connected to ubs port 1 on the datalogger using an usb-ethernet adapter. The software on the datalogger is GDGPS 3.3.3. The receiver is a Javad Delta G3T (TRE_G3TH) with S/N 00849. The data logger has S/N 5029682 (JPL GPS BASESTATION). The antenna setup has not been changed; same marker and same antenna as before (LEIAR25.R3 LEIT). The receiver is not (yet) connected to the external frequency standard (we have a 10 MHz signal from the timing lab).
2011-04-15T10:00Z 1631/5 105 -: Marker 13502M009 had to be temporarily removed and was reinstalled later at more or less the same position. This resulted in a move of 32.7 mm to the South, 1.4 mm to the East and 6.3 mm Down. The shift is: dX=0.0217, dY=0.0031, dZ=-0.0251 in ECEF, or dN=-0.0327, dE=0.0014, dU= -0.0063 in a local frame. The old marker has been renamed to 13502M009X. At the same time the Ahstech Chokering antenna was replaced by a LEICA AR25.R3 chokering.
2002-09-04T00:00Z 1182/3 247 -: This receiver is streaming data directly to JPL. No raw data or RINEX files are stored at the local data center. For the RINEX data, please contact JPL directly.

DLF4 (Delft ESTB)

Marker ID: 13502M007
Operator: TUD/CITG/GRS, EUROCONTROL
Log file: dlf4_20081111.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2001-11-15T00:00Z	1140/4 319	2006-08-23T23:59Z	1389/3 235	NOV MILLEN-OEM3	10049	4.52
2006-08-23T00:00Z	1389/3 235	2008-11-11T16:59Z	1505/2 316	SEPT POLARX2	1230	2.4.0
2008-11-11T17:00Z	1505/2 316	2010-12-05T00:00Z	1613/0 339	SEPT POLARX2	1230	2.7.0

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2001-11-15T00:00Z	1140/4 319	2001-11-27T00:00Z	1142/2 331	NOV600	NONE	40016	0.0990
2001-11-28T00:00Z	1142/3 332	2001-12-03T15:10Z	1143/1 337	LEIAT504	NONE	824	0.0990
2001-12-03T15:10Z	1143/1 337	2003-11-04T00:00Z	1243/2 308	NOV600	NONE	50040	0.1010
2003-11-04T00:00Z	1243/2 308	2004-09-14T12:00Z	1288/2 258	LEIAT502	NONE	10798	0.0990
2004-09-14T12:00Z	1288/2 258	2011-02-22T11:00Z	1624/2 053	LEIAT504	NONE	261	0.0300	LEIAT504+30_____NONE_261.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2001-11-15T00:00Z	1140/4 319	2011-02-22T11:00Z	1624/2 053	INTERNAL

Notes

2010-12-05T00:00Z 1613/0 339 -: The receiver was stopped on 5 December 2010. Data from the same antenna continues to be available from DLF5.

DLF5 (Delft ESTB)

Marker ID: 13502M009
Operator: TUD/CITG/GRS,EUROCONTROL
Log file: dlf5_20040914.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2004-06-18T00:00Z	1275/5 170	2019-02-16T10:00Z	2040/6 047	SEPT POLARX2	1224	2.4.0

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2011-04-15T10:00Z	1631/5 105			LEIAR25.R3	LEIT	10030006	0.0000	LEIAR25.R3______LEIT_10030006.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2004-06-18T00:00Z	1275/5 170	2019-02-16T10:00Z	2040/6 047	INTERNAL

Notes

2015-08-03T18:15Z 1856/1 215 - 2015-08-04T11:40Z 1856/2 216: The antenna cable of the LEIAR25.R3 LEIT antenna (DLF5) has been replaced. In order to change the antenna cable the antenna had to be detached from the monument; after the cable replacement the same antenna was reattached to the monument in exactly the same position. The bronze alloy retaining bolt has been replaced by a stainless steel bolt. The new antenna cable is of the same type LMR400 and length. The antenna was in good working order and was cleaned. The antenna was operational again on Aug 4 2015, 11:39:28 UTC. No data is available from Aug 3 2015, 18:15:21 until Aug 4 2015, 11:39:28 UTC.
2011-04-15T10:00Z 1631/5 105 -: The antenne for the Eurocontrol Data Collection Network (EDCN) has been moved from marker 13502M007 to marker 13502M009.

DLF5X (Delft ESTB)

Marker ID: 13502M007
Operator: TUD/CITG/GRS,EUROCONTROL
Log file: dlf5_20040914.log

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2004-06-18T00:00Z	1275/5 170	2011-02-22T11:00Z	1624/2 053	SEPT POLARX2	1224	2.4.0

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2004-09-14T12:00Z	1288/2 258	2011-02-22T11:00Z	1624/2 053	LEIAT504	NONE	261	0.0300	LEIAT504+30_____NONE_261.atx
2011-02-22T11:00Z	1624/2 053	2011-04-15T10:00Z	1631/5 105	LEIAR25.R3	LEIT	10030006	0.0720	LEIAR25.R3______LEIT_10030006.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2001-11-15T00:00Z	1140/4 319			INTERNAL

Notes

2011-04-15T10:00Z 1631/5 105 -: The antenne for the Eurocontrol Data Collection Network (EDCN) has been moved from marker 13502M007 to marker 13502M009.

DLF9 (Delft GNSS)

Marker ID: 13502M007
Operator: TUD/CITG/GRS

Receiver

Installed	week/d doy	Removed	week/d doy	Receiver type	S/N	Firmware
2011-02-22T11:00Z	1624/2 053	2011-04-15T10:00Z	1631/5 105	TRIMBLE NETR9	70764	4.22

Antenna

Installed	week/d doy	Removed	week/d doy	Antenna type	Dome	S/N	Height	Antenna calibration
2011-02-22T11:00Z	1624/2 053	2011-04-15T10:00Z	1631/5 105	LEIAR25.R3	LEIT	10030006	0.0000	LEIAR25.R3______LEIT_10030006.atx

External Frequency

Installed	week/d doy	Removed	week/d doy	Ext. Frequency type
2011-02-22T11:00Z	1624/2 053	2011-04-15T10:00Z	1631/5 105	INTERNAL

Notes

2011-02-22T11:00Z 1624/2 053 - 2011-04-15T10:00Z 1631/5 105: This is a temporary occupation. On April 15 2011 the receiver and antenna have been relocated to stream DLF1 and marker 13502M009.

For more information contact Hans van der Marel.