Survey mode GPS data in the West Pamir, Tajikistan, Central Asia, 2013-2016

Cite as:

Metzger, Sabrina; Ischuk, Anatoly; Akhmedov, Akram; Ilyasova, Zukhrah; Moreno, Marcos; Murodkulov, Shohruhk; Deng, Zhiguo (2019): Survey mode GPS data in the West Pamir, Tajikistan, Central Asia, 2013-2016. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2019.007

Status

I N R E V I E W : Metzger, Sabrina; Ischuk, Anatoly; Akhmedov, Akram; Ilyasova, Zukhrah; Moreno, Marcos; Murodkulov, Shohruhk; Deng, Zhiguo (2019): Survey mode GPS data in the West Pamir, Tajikistan, Central Asia, 2013-2016. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2019.007

Abstract

We have installed 20 new Global Positioning System (GPS) markers in the West Pamir and the Tajik Depression and measured 25 markers once a year between 2013 and 2016 in survey mode. The stations are positioned along two dense NW-SE oriented profiles with an average spacing of 5-10 km. The profiles cross the Darvaz and the Vakhsh/Ilyak fault and thus monitor the recent slip of these two profiles, which are expected to accommodate the gravity-driven westward extrusion of the West Pamir into the Tajik Depression. Some of the stations include millimeter to centimeter offsets potentially caused by the 2015 Mw7.2 Sarez, Pamir, earthquake.

Methods

The markers are 100 mm long stainless steel rods of 8 mm diameter drilled and glued into the ground. Marker positions were measured for nearly 48 hrs per measurement at a sampling rate of 30 s. The data were always acquired in autumn (September to November) to minimize seasonal signal contributions. We used a Trimble R7 receiver and a Trimble Geodetic Zephyr Model 1 (TRM41249.00) antenna on a leveled spike mount with a fixed height of 12.2 cm. The antenna cable plug was oriented towards North whenever possible.

Metadata regarding the measurement conditions were archived on paper log sheets. Trimble's proprietary data was converted to ASCII-files using the Trimble software "runpkr00", and then into exchangeable RINEX data using the software "TEQC" (https://doi.org/10.1007/PL00012778), which can be downloaded from the UNAVCO webpage. Finally, mandatory metadata - e.g. antenna and receiver types, marker names, antenna offsets - were added to the header information of the RINEX files.

The resulting data presented herein include daily observations in RINEX format. These are organized in yearly and daily folders ("2019-007_Metzger-et-al_data/daily/YYYY/DDD"). Further documentation is found in the folder "2019-007_Metzger-et-al_documentation" and includes the technical reports ("TechnicalReport20YY.pdf") with additional details regarding the installation and remeasurement of the network, waypoint descriptions ("WaypointDescriptions.pdf"), technical aspects of the GPS antenna ("antenna_TRM41249_00.gif"), logsheets documenting additional data acquisition information ("logsheets") as well as example pictures taken during data acquistion ("photo_examples").

Authors

Metzger, Sabrina;GFZ German Research Centre for Geosciences, Potsdam, Germany
Ischuk, Anatoly;Institute of Geology, Earthquake Engineering and Seismology, Academy of Sciences, Dushanbe, Republic of Tajikistan
Akhmedov, Akram;Institute of Geology, Earthquake Engineering and Seismology, Academy of Sciences, Dushanbe, Republic of Tajikistan
Ilyasova, Zukhrah;Institute of Geology, Earthquake Engineering and Seismology, Academy of Sciences, Dushanbe, Republic of Tajikistan
Moreno, Marcos;GFZ German Research Centre for Geosciences, Potsdam, Germany
Murodkulov, Shohruhk;Institute of Geology, Earthquake Engineering and Seismology, Academy of Sciences, Dushanbe, Republic of Tajikistan
Deng, Zhiguo;GFZ German Research Centre for Geosciences, Potsdam, Germany

Contact

Metzger, Sabrina (Researcher); GFZ German Research Centre for Geosciences, Potsdam, Germany;
Deng, Zhiguo (Researcher); GFZ German Research Centre for Geosciences, Potsdam, Germany;

Contributors

GFZ German Research Centre for Geosciences, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany; Institute of Geology, Earthquake Engineering and Seismology, Academy of Sciences, Dushanbe, Tajikistan

Keywords

RNX data, campaign GPS, GNSS, Tajikistan, Tajik basin, Vakhsh fault, Darvaz fault, Pamir, West Pamir, surface displacement, linear rates, interseismic rates, deformation rates, sGPS

GCMD Science Keywords

EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION > GLOBAL POSITIONING SYSTEMS
Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GNSS

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        CharacterString: The markers are 100 mm long stainless steel rods of 8 mm diameter drilled and glued into the ground. Marker positions were measured for nearly 48 hrs per measurement at a sampling rate of 30 s. The data were always acquired in autumn (September to November) to minimize seasonal signal contributions. We used a Trimble R7 receiver and a Trimble Geodetic Zephyr Model 1 (TRM41249.00) antenna on a leveled spike mount with a fixed height of 12.2 cm. The antenna cable plug was oriented towards North whenever possible. Metadata regarding the measurement conditions were archived on paper log sheets. Trimble's proprietary data was converted to ASCII-files using the Trimble software "runpkr00", and then into exchangeable RINEX data using the software "TEQC" (https://doi.org/10.1007/PL00012778), which can be downloaded from the UNAVCO webpage. Finally, mandatory metadata - e.g. antenna and receiver types, marker names, antenna offsets - were added to the header information of the RINEX files. The resulting data presented herein include daily observations in RINEX format. These are organized in yearly and daily folders ("2019-007_Metzger-et-al_data/daily/YYYY/DDD"). Further documentation is found in the folder "2019-007_Metzger-et-al_documentation" and includes the technical reports ("TechnicalReport20YY.pdf") with additional details regarding the installation and remeasurement of the network, waypoint descriptions ("WaypointDescriptions.pdf"), technical aspects of the GPS antenna ("antenna_TRM41249_00.gif"), logsheets documenting additional data acquisition information ("logsheets") as well as example pictures taken during data acquistion ("photo_examples").
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