Seismic While Drilling (SWD) data processing

- Clean the data
- Analysis of borehole seismic data (Fourier and Hilbert transforms)
- Development and documentation of a seismic processing workflow (velocity predictions, attributes)

GEO-TECHNOLOGY SOLUTIONS DIVISION - EP/EXPLO/GTS/MTG/IDI

GTS is the reference partner in Geosciences, oriented towards safety and cost effectiveness, delivering fit for purpose services, innovative technologies and knowledge, to accelerate the Group transformation.

https://www.ep.total.com/en/innovations/our-rd-centers/jean-feger-scientific-and-technical-centre-cstjf-heart-our-scientific
https://www.cstjf-pau.total/fr/accueil

• Scientific software development engineer (C++ /Qt) for radio navigation (GNSS)
http://www.guide-gnss.net/contenuguide/uploads/2014/10/SILICOM%20for%20GUIDE.pdf
Qt commands used: paintEvent, QSlider, QSpinBox, QProgressBar, QGridLayout, QScrollBar, QLineEdit, QCheckBox, QRadioButton, QPushButton, QComboBox, QListWidget, QHBoxLayout, QTimer
• Reading the different fields of an NMEA file using object-oriented code in C++ to be adapted
• GNSS signal processing in MATLAB/Python (spectrograms)
Reading and implementation of a processing chain for adaptive filters implemented in a research article by Petter Russer in order to produce spectrograms for the analysis of the noise attenuated by this process
https://www.researchgate.net/publication/230814713_Real-time_Ambient_Noise_Cancellation_for_EMI_Measurements_on_Open_Area_Test_Sites

Use of a BDS (Excel) created and modified by NEXEYA
OCTAVE (coded by CS): Tools and Components for Processing, Acquisition, Visualization and Exploitation of telemetry
Octave (@CS) Provides basic services of a TM and TC processing platform
• create the operational procedures (Octave @CS) containing all the commands transmitted to the ANGELS nanosatellite
File o2pl (XLM) writings DHS_PAR_CptRstLecture, DHS_PAR_CptRstEcriture, DHS_PAR_CptRstLecture, DHS_PAR_CptRstReinit, DHS_PAR_FlagSatEcriture, DHS_PAR_FlagSatLecture, DHS_PAR_GENLecture, DHS_PAR_LimiteCptRstEcriture, DHS_PAR_LimiteCptRstLecture, DHS_PAR_SeuilBattEcriture, DHS_PAR_SeuilBattLecture, DHS_PAR_VersionLVDemEcriture, DHS_PAR_VersionLVDemLecture
I went to carry out a day of testing coded operational procedures in a clean room at NEXEYA (test on FlatSat)
• develop satellite parameter visualization pages to control it and monitor its operation
Thanks to Octave (CS) I was able to control and view the parameters read and modified by the execution of the FCP (ex: Batterie.qvk) - HMI GUI
• participate in the preparation of operations for the exploitation of the ANGELS nanosatellite
• create calculated parameters and monitoring with the Best & Castor tool (Excel)
• internal training towards the end of my contract: Jason-2/3, SMOS, POPS, PrestoPlot / PrestoDecom, SCAO & payload PROTEUS, SuDo, ISIS & Step-2, S3WNG mission
• Use of PROTON and VTS software to simulate the trajectory and real orientation of satellites over time using files from the G2
- PROTON will be used to convert the TM from the G2 into a format readable by VTS.
- VTS is the main tool for visualizing simulations in Celestia

Improving the teledetection and the characterization of icebergs for around-the-world sailing races using Sentinel-3A multi-sensor data (SRAL, OLCI) - Copernicus Programme

Around-the-world sailing races (CLS) [FR]: https://www.youtube.com/watch?v=evkd5dSel-Q
Copernicus programme [EN]: https://www.youtube.com/watch?v=MGJss4lDaBo&t=5s
CLS Group (presentation) [EN]: https://www.youtube.com/watch?v=Ld_bEHlke3g&t=1s
CLS race: https://www.cls.fr/en/vg2016-race-satellite-surveillance/

• Investigation and exploitation of characteristic peaks found in the Level-2 (Sentinel-3A) SRAL ocean data
• Characterize the presence of icebergs in the Trailing Edge portion of SAR echoes
• Design and develop processing chains and automated workflows (Python & Script shell) for the mapping of icebergs at different threshold levels under Google Earth (generation of kmz files)
• Investigate OLCI data using the SNAP toolbox for prototyping for the implementation of automated workflows in Python
• Implementation of a method for the discrimination of cloud/sea ice/cloud ice
• Compare the capacity of observation between the altimetry missions Jason-2/3, Saral/Altika, HY-2 with the mission Sentinel-3A (conventional vs SAR altimetry)
• Analyse the current drift of Sargasses near the Caribbean Sea

Eventually, the service of iceberg teledetection and monitoring provided by CLS integrate since then the cartography of icebergs coming from Sentinel-3A (satellite altimetry, SAR & p-LRM modes) as well as hectometric sea ice/icebergs (including those located under clouds that do not contain cloud ice ^^) found in OLCI processed images (300 m = OLCI Full Resolution).

Furthermore, I also study the current Sargassum seaweeds issue near the Caribbean Islands using OLCI processed images (cf MCI = Maximum Chlorophyll Index) :
http://www.sciencemag.org/news/2018/06/mysterious-masses-seaweed-assault-caribbean-islands

Interactions with SIRS, the BU Espace and CLS Brest
https://www.cls.fr/en/cls-group/

Checking the bias of Potsdam value for surface gravity observations over Ireland using Satellite Gradiometry

Context of the study :
https://www.dias.ie/cp/geo/geo-gravity-data/

During this internship, I processed the gravity data owned by DIAS in three different aspects:
• I unified the Northern Ireland gravity data with those from the Republic of Ireland, i.e. data owned by DIAS (GMT)
• I made a cubic interpolation of unified data sets and I found the reference gravity field of the Bouguer anomalies occurring in the DIAS gravity data set
• I compared the interpolated surface gravity (i.e. DIAS data) with those derived from global gravity field models, the satellite GOCO05S model and the combined EGM2008 model
Eventually, I was able to explain the origin of the bias.

The issue of the gravity gap located exactly at the irish geopolitical border wasn't explained for more than 30 years, after the death of Dr. Thomas Murphy (DIAS).
https://www.dias.ie/2013/05/03/internal-publications/
I eventually gave a satisfactory explanation to this issue thanks to my investigation during this research internship. Henceforth, an explanation between the gravity map coming from the land-based relative measurements (1950-1980) and the map generated from gradiometry measurements (GOCO05S or EGM2008 models) needs to be given.

Thesis proposal with Professor Martinec ZDENEK (afterwards):
Height unication for the entire Ireland to evaluate a precise value of the geopotential W0 using Tide Gauges data and Ocean Modelling Circulation
https://www.nrcan.gc.ca/earth-sciences/geomatics/geodetic-reference-systems/9054

Seismic refraction investigation of the watershed Strengbach (Vosges Mountains, France) using P and S wave first-arrival tomography

Context of the study:
Strengbach Watershed OHGE : https://data.lter-europe.net/deims/site/rbv_fr_10 & Observatoire
HYDROCRIZTO project [FR]: http://www.agence-nationale-recherche.fr/Project-ANR-15-CE01-0010
Rayfract Software: http://rayfract.com/
Hydrogeochemistry of the Environment, OHGE [FR] : http://ohge.unistra.fr/

• Seismic refraction measurements in the field (P & S waves) with Dr. Matthias Zillmer
• Analysis of SEG-Y data (field measurements, VSP, piezometers) with Seismic Unix (bash)
• Inverting the first-arrival traveltimes picked with Rayfract
• Analysis and combination of tomographic grids (P and S waves) with Surfer Golden
• Writing a scientific article (LaTex) and preparing an oral presentation in English

Microgravimetric monitoring of ES Géothermie geothermal reservoirs in Northern Alsace (Enhanced Geothermal System = EGS)

Context of the study :
Research paper - Microgravimetry applied to deep geothermy monitoring: https://geothermal-energy-journal.springeropen.com/articles/10.1186/s40517-015-0035-3
Investiture of the geothermal plant @Rittershoffen (June 2016) [FR]: http://alsace.edf.com/innover/centrale-geothermie-profonde-edf-es-roquette-rittershoffen-inauguration/
Labex Geothermy [FR]: http://labex-geothermie.unistra.fr/article561.html
Soultz-sous-Forêts - Du site laboratoire au site industriel [FR]: https://www.youtube.com/watch?v=MOfGY0029yg

• Acquire microgravity data using a Scintrex CG-5 Autograv (Soultz-sous-Forêts and ECOGI networks & J9 observatory)
• Process the data using the software pyGrav
• Write a field report

Analyse and process remote sensing data