First spaceborne phase altimetry over sea ice using TechDemoSat‐1 GNSS‐R signals

A track of sea ice reflected Global Navigation Satellite System (GNSS) signal collected by the TechDemoSat-1 mission is processed to perform phase altimetry over sea ice. High-precision carrier phase measurements are extracted from coherent GNSS reflections at a high angle of elevation (>57°). The altimetric results show good consistency with a mean sea surface (MSS) model, and the root-mean-square difference is 4.7 cm with an along-track sampling distance of ∼140 m and a spatial resolution of ∼400 m. The difference observed between the altimetric results and the MSS shows good correlation with the colocated sea ice thickness data from Soil Moisture and Ocean Salinity. This is consistent with the reflecting surface aligned with the bottom of the ice-water interface, due to the penetration of the GNSS signal into the sea ice. Therefore, these high-precision altimetric results have potential to be used for determination of sea ice thickness.

[1]  R. Kwok,et al.  Sea surface height and dynamic topography of the ice‐covered oceans from CryoSat‐2: 2011–2014 , 2016 .

[2]  Jaume Sanz,et al.  Improvement of global ionospheric VTEC maps by using kriging interpolation technique , 2005 .

[3]  G. Egbert,et al.  Efficient Inverse Modeling of Barotropic Ocean Tides , 2002 .

[4]  Ola M. Johannessen,et al.  The relation between sea ice thickness and freeboard in the Arctic , 2010 .

[5]  M. Martín-Neira.  A pasive reflectometry and interferometry system (PARIS) application to ocean altimetry , 1993 .

[6]  Weimin Huang,et al.  Neural Networks Based Sea Ice Detection and Concentration Retrieval From GNSS-R Delay-Doppler Maps , 2017, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[7]  Malcolm Davidson,et al.  CryoSat‐2 estimates of Arctic sea ice thickness and volume , 2013 .

[8]  Matthias Drusch,et al.  Snow thickness retrieval over thick Arctic sea ice using SMOS satellite data , 2013 .

[9]  E. Cardellach,et al.  Characterization of dry-snow sub-structure using GNSS reflected signals , 2012 .

[10]  Tong Lee,et al.  Analysis of GNSS-R Altimetry for Mapping Ocean Mesoscale Sea Surface Heights Using High-Resolution Model Simulations , 2016, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[11]  Andrzej Krankowski,et al.  Comparing performances of seven different global VTEC ionospheric models in the IGS context , 2016 .

[12]  Umar Iqbal Bhatti,et al.  Remote sensing of ocean, ice and land surfaces using bistatically reflected GNSS signals from low Earth orbit , 2015, 2015 Fourth International Conference on Aerospace Science and Engineering (ICASE).

[13]  Jens Wickert,et al.  Potential of space-borne GNSS reflectometry to constrain simulations of the ocean circulation , 2015, Ocean Dynamics.

[14]  Manuel Martín-Neira,et al.  The PARIS Ocean Altimeter In-Orbit Demonstrator , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[15]  J. Löfgren,et al.  Three months of local sea level derived from reflected GNSS signals , 2011 .

[16]  Peter Wadhams,et al.  Relationship between sea ice freeboard and draft in the Arctic Basin, and implications for ice thickness monitoring , 1992 .

[17]  Philip Jales,et al.  Spaceborne GNSS reflectometry for ocean winds: First results from the UK TechDemoSat‐1 mission , 2015 .

[18]  Jens Wickert,et al.  A Phase-Altimetric Simulator: Studying the Sensitivity of Earth-Reflected GNSS Signals to Ocean Topography , 2016, IEEE Transactions on Geoscience and Remote Sensing.

[19]  Salvatore D'Addio,et al.  Phase Altimetry With Dual Polarization GNSS-R Over Sea Ice , 2012, IEEE Transactions on Geoscience and Remote Sensing.

[20]  Jamila Beckheinrich,et al.  Sea surface topography retrieved from GNSS reflectometry phase data of the GEOHALO flight mission , 2014 .

[21]  Weimin Huang,et al.  Spaceborne GNSS-R Sea Ice Detection Using Delay-Doppler Maps: First Results From the U.K. TechDemoSat-1 Mission , 2016, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[22]  C. Zuffada,et al.  First spaceborne observation of sea surface height using GPS‐Reflectometry , 2016 .

[23]  Adriano Camps,et al.  Sea Ice Detection Using U.K. TDS-1 GNSS-R Data , 2017, IEEE Transactions on Geoscience and Remote Sensing.

[24]  H. S. Hopfield.  Tropospheric Effect on Electromagnetically Measured Range: Prediction from Surface Weather Data , 1971 .

[25]  Adriano Camps,et al.  Experimental Evaluation of GNSS-Reflectometry Altimetric Precision Using the P(Y) and C/A Signals , 2014, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[26]  J. Wickert,et al.  Detection of Arctic Ocean tides using interferometric GNSS‐R signals , 2011 .

[27]  Weiqiang Li,et al.  Feasibility of GNSS-R Ice Sheet Altimetry in Greenland Using TDS-1 , 2017, Remote. Sens..

[28]  Philip Jales,et al.  Spaceborne GNSS-Reflectometry on TechDemoSat-1: Early Mission Operations and Exploitation , 2016, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[29]  William Marshall,et al.  Improved orbit predictions using two-line elements , 2010, 1002.2277.

[30]  Estel Cardellach,et al.  Carrier phase delay altimetry with GPS‐reflection/occultation interferometry from low Earth orbiters , 2004 .

[31]  Penina Axelrad,et al.  Bistatic Scattering of GPS Signals Off Arctic Sea Ice , 2010, IEEE Transactions on Geoscience and Remote Sensing.

[32]  Penina Axelrad,et al.  An Assessment of the Precision and Accuracy of Altimetry Retrievals for a Monterey Bay GNSS-R Experiment , 2016, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[33]  Manuel Martín-Neira,et al.  Consolidating the Precision of Interferometric GNSS-R Ocean Altimetry Using Airborne Experimental Data , 2014, IEEE Transactions on Geoscience and Remote Sensing.

[34]  Francisco José Fabra Cervellera.  GNSS-R as a source of opportunity for remote sensing of the cryosphere , 2013 .

[35]  Chris Rizos,et al.  Single-Pass Sub-Meter Space-Based GNSS-R Ice Altimetry: Results From TDS-1 , 2017, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[36]  Manuel Martín-Neira,et al.  GEROS-ISS: GNSS REflectometry, Radio Occultation, and Scatterometry Onboard the International Space Station , 2016, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[37]  J. Kong.  Scattering of Electromagnetic Waves , 2021, Principles of Scattering and Transport of Light.

[38]  Rashmi Shah,et al.  Demonstrating soil moisture remote sensing with observations from the UK TechDemoSat‐1 satellite mission , 2016 .

[39]  Ole Baltazar Andersen,et al.  The DTU13 MSS (Mean Sea Surface) and MDT (Mean Dynamic Topography) from 20 Years of Satellite Altimetry , 2015 .

[40]  S. Gleason,et al.  Detecting Bistatically Reflected GPS Signals from Low Earth Orbit Over Land Surfaces , 2006, 2006 IEEE International Symposium on Geoscience and Remote Sensing.

[41]  Manuel Martín-Neira,et al.  Altimetric Analysis of the Sea-Surface GPS-Reflected Signals , 2010, IEEE Transactions on Geoscience and Remote Sensing.

[42]  Bruce C. Douglas,et al.  Evaluation of Geosat altimeter data with application to tropical Pacific sea level variability , 1989 .

[43]  C. Zuffada,et al.  5‐cm‐Precision aircraft ocean altimetry using GPS reflections , 2002 .