Volume 32 (2022)
Volume 31 (2021)
Volume 30 (2020)
Volume 29 (2020)
Volume 28 (2019)
Volume 27 (2018)
Volume 26 (2017)
Volume 25 (2016)
Volume 24 (2015)
Volume 23 (2014)
Volume 22 (2013)
Volume 21 (2012)
Volume 20 (2011)
Volume 19 (2010)
Volume 18 (2009)
Volume 17 (2008)
Volume 16 (2007)
Estimation of the active faults, based on Seismic, geologic and geodetic moment rates in the South and West of Lut block

A. Rashidi; M. M. Khatib; S. M. Mosavi; Y. Jamor

Volume 26, Issue 104 , September 2017, , Pages 211-222


  In the S,W Lut Block, geodetic moment rate is more than seismic and geological moment rates. Depending on the type of deformation and geometry of the faults, the study area divided to the 4 parts : northern, central, southern and southeastern (South Lut Block) parts. Values of  three types of moment ...  Read More

Improving the Threshold of Detectable Co-Seismic Displacements by Using High Rate GPS Measurements

Yahya Djamour; S. Tabibi; M. M. Hossainali

Volume 22, Issue 85 , December 2013, , Pages 55-62


  The accuracy of GPS derived positions in short term measurements largely depends on the better modeling of residual errors which is normally reduced in long term measurements by averaging the obtained results. To increase the accuracy of the movements obtained through the analysis of high rate data in ...  Read More

Quantifying the Ground Co-Seismic Variations by using high Rate GPS Data, Case Study: San-Simeon Earthquake 2003 Dec. 22 (California- United States of America)

S. Tabibi; M. M. Hossainali; Yahya Djamour

Volume 21, Issue 83 , December 2012, , Pages 97-102


  Better understanding of earthquakes primarily requires more accurate dynamic and kinematic models for fault rupture. There are several methods for ground motion detection; each of them has its own advantages and limitations. The processes, needed for the estimation of displacements by the seismic data, ...  Read More

Estimation of Tectonic Slip Rate of Northern Band of Tehran by using GPS

Yahya Djamour; S. Hashemi Tabatabaei; M. Sedighi; H. R. Nankali

Volume 21, Issue 83 , December 2012, , Pages 211-218


  In previous decades, using traditional geodetic observations such as distance and angle measurements was prevalent in the earth surface displacement studies. After accessing to satellite positioning systems with a high precision ability such as GPS, we encountered to an upheaval in the earth surface ...  Read More

Proposing a New Strategy to Make Precise Re-leveling Observations of Iran in Vertical Geodynamical Studies

Yahya Djamour; M. M. Hossainali; Y. H. Chavari; P. Vanicek; H. Nazari; M. Amighpey; S. Arabi

Volume 22, Issue 86 , December 2012, , Pages 273-260


  The technique of precise leveling is certainly the most precise in gathering height difference observations. The main limitation of the mentioned technique is its high cost and low speed characteristics. Hence, for the purpose of repeating the precise leveling measurements (re-leveling), which is necessary ...  Read More

Position Error Propagation of Reference Stations in Relative Positioning Using GNSS Phase Double Difference Observations

Yahya Djamour

Volume 20, Issue 80 , January 2011, , Pages 149-154


  Today, the best coordinates of stations on the ground are obtained by using Global Navigation Satellite Systems (GNSS) such as Global Positioning System (GPS). There are many error sources affecting the GNSS observations that limit the required accuracies. But differential positioning methods, like double ...  Read More

Investigation of the Crustal Deformation in Iran Using Permanent GPS Station Time Series and Application of Noise Analysis

Sh. Roohi; Y. Jamour

Volume 18, Issue 70 , February 2009, , Pages 76-83


     Today, one of the main objectives of the geodesy is to identify the changes over time at the surface of the earth. It is critical to the design of the infrastructures to know these changes and to be able to predict their trends with time, as any ignorance could lead to incompensable losses ...  Read More

The Effect of GPS Stations Distances from Fault Trace in the Estimation Accuracy of Fault Parameters

L. Karimi Dehkordi; B. Vosoughi; Y. Djamour

Volume 18, Issue 71 , January 2009, , Pages 155-159


  In this study work the idea of the optimal design of GPS monitoring network is extended in order to estimate the parameters of a single strike slip fault: i.e. slip rate and locking depth. By using some numerical examples, the influence of the GPS station distances from the fault trace has been investigated. ...  Read More