Browsing NTNU Open by Author "Joodaki, Gholamreza"

Now showing items 1-14 of 14

    • Correlation Analysis of Multipath Effects in GPS-Code and Carrier Phase Observations 

      Nahavandchi, Hossein; Joodaki, Gholamreza (Peer reviewed; Journal article, 2010)
      Multipath error is a limiting factor for successful ambiguity resolution in precise real-time kinematic GPS positioning, both in the carrier phase and pseudorange measurements. Understanding the temporal characteristics ...

    • Earth Mass Change Tracking Using GRACE Satellite Gravity Data 

      Joodaki, Gholamreza (Doktoravhandlinger ved NTNU, 1503-8181; 2014:34, Doctoral thesis, 2014)
      This project is dealing with the estimation of present-day Earth’s mass transport and its redistribution by using observations from Gravity Recovery and Climate Experiment (GRACE) satellite mission. GRACE measures the ...

    • Estimation of Groundwater Depletion in Iran’s Catchments Using Well Data 

      Safdari, Zohreh; Nahavandchi, Hossein; Joodaki, Gholamreza (Journal article; Peer reviewed, 2022)
      Iran is experiencing significant water challenges that have now turned water security into a national priority. By estimating secular trend groundwater storage in Iran between 2002 and 2017, we see that there is an intensive ...

    • GRACE-derived ice-mass loss spread over Greenland 

      Nahavandchi, Hossein; Joodaki, Gholamreza; Schwartz, Vegar (Peer reviewed; Journal article, 2015)
      The Gravity Recovery and Climate Experiment (GRACE) monthly satellite data is used to examine the extent and magnitude of Greenland ice sheet melting for 2003-2012. We show that the well documented Greenland ice mass loss ...

    • Greenland ice mass balance using GRACE gravity data 

      Schwartz, Vegar (Master thesis, 2014)
      The mass balance of Greenland has been assessed with data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission. Monthly data has been used through the time span of the study; January 2003 - December ...

    • Greenland ice-melt spread into Northwest Coast revealed by GRACE (GRACE data viser at issmeltingen på Grønland sprer seg til nordvestkysten) 

      Nahavandchi, Hossein; Joodaki, Gholamreza (Peer reviewed; Journal article, 2012)
      We examine the extent and magnitude of Greenland ice sheet surface melting between 2002 and 2010. We show that the well documented Greenland ice mass loss in the southern region spread to northwest Greenland in the period ...

    • Greenland mass balance estimation from satellite gravity measurements 

      Joodaki, Gholamreza; Nahavandchi, Hossein (Peer reviewed; Journal article, 2010)
      The Gravity Recovery and Climate Experiment (GRACE) data is used to estimate the secular trend and periodic variations of ice mass variability over Greenland. To do this, we use 92 monthly GRACE level 2 Release-04 (RL04) ...

    • Mass balance and mass loss acceleration of the Greenland ice sheet (2002 – 2011) from GRACE gravity data 

      Joodaki, Gholamreza; Nahavandchi, Hossein (Journal article; Peer reviewed, 2012)
      We examine the magnitude and acceleration of the Greenland ice sheet mass loss between 2002 and 2011. We use monthly observations of time-variable gravity from the Gravity Recovery and Climate Experiment (GRACE) satellite ...

    • Mass loss of the Greenland ice sheet from GRACE time-variable gravity measurements 

      Joodaki, Gholamreza; Nahavandchi, Hossein (Peer reviewed; Journal article, 2012)
      The Gravity Recovery and Climate Experiment (GRACE) satellite data is used to estimate the rate of ice mass variability over Greenland. To do this, monthly GRACE level 2 Release-04 (RL04) data from three different processing ...

    • Ocean Wave Measurement Using GPS Buoys 

      Joodaki, Gholamreza; Nahavandchi, Hossein; Cheng, Kevin (Journal article; Peer reviewed, 2013)
      The observation of ocean wave parameters is necessary to improve forecasts of ocean wave conditions. In this paper, we investigate the viability of using a single GPS receiver to measure ocean-surface waves, and present a ...

    • Seasonal variation analysis of Greenland ice mass time-series 

      Shamshiri, Roghayeh; Nahavandchi, Hossein; Joodaki, Gholamreza (Journal article; Peer reviewed, 2017)
      We derive the mass balance of Greenland ice sheet from the Gravity Recovery and Climate Experiment (GRACE) for the period January 2003–October 2014. We have found an ice mass loss with peak amplitude of −15 cm/yr in the ...

    • Seasonal variation analysis of Greenland ice mass time-series 

      Shamshiri, Roghayeh; Nahavandchi, Hossein; Joodaki, Gholamreza (Journal article, 2018)
      We derive the mass balance of Greenland ice sheet from the gravity recovery and climate experiment (GRACE) for the period January 2003 to October 2014. We find an ice mass loss with peak amplitude of -15 cm/year in the ...

    • Steric sea level changes from ENVISAT and GRACE in the Nordic Seas 

      Joodaki, Gholamreza; Nahavandchi, Hossein; Ghazavi, Kourosh (Peer reviewed; Journal article, 2013)
      Steric sea level changes are estimated over the Nordic Seas using ENVISAT (Environmental Satellite) altimetry and GRACE (Gravity Recovery and Climate Experiment) gravity data. We have used altimetry data from the ENVISAT ...

    • A Technical Note on Least Squares Mascon Fitting to GRACE Satellite Data to Estimate Total Water Storage Changes in the Middle East 

      Safdari, Zohreh; Joodaki, Gholamreza; Nahavandchi, Hossein (Chapter, 2022)
      Nowadays the twin satellite gravimetry missions, GRACE (Gravity Recovery and Climate Experiment) and GRACE -Follow On, provide a unique and alternative tool for monitoring and measuring Total Water Storage (TWS) changes ...