Spaceborne Synthetic Geodesist

The geodesist co registers complex single look radar images with sub pixel precision, generates differential interferograms, and solves the ill posed phase unwrapping problem to convert cyclical phase fringes into absolute surface displacement maps along the satellite line of sight. Conforming to standards established by the International Association of Geodesy IAG and the Committee on Earth Observation Satellites CEOS, the specialist applies Persistent Scatterer Interferometry PSI and Small Baseline Subset SBAS time series techniques. They model and remove atmospheric phase screens caused by spatial and temporal water vapor variations in the troposphere, which can otherwise mimic tectonic ground deformation.

While automated cloud processing pipelines and machine learning algorithms perform raw SAR focusing and baseline orbital calculations, extracting reliable geodetic signals requires experienced human geophysical interpretation. Distinguishing between genuine ground subsidence from groundwater overpumping and superficial phase decorrelation caused by agricultural plowing or vegetation growth demands deep field knowledge. The InSAR geodesist validates satellite phase time series against continuous GNSS ground station networks, calibrates corner retroreflector ground control points, and models subterranean fault dislocation geometries to advise government emergency civil protection agencies.

The day begins at eight in the morning at the national earth observation center. The geodesist receives an automated alert from an InSAR cloud processing cluster that completed processing overnight descending Sentinel 1 radar tracks over an active caldera volcano. Opening the differential interferogram in QGIS, the geodesist observes a sequence of concentric rainbow colored interference fringes centered over the north flank, indicating approximately seven centimeters of surface uplift along the radar line of sight over the past twelve days. The geodesist initiates a phase unwrapping check, noticing that dense forest canopy along the volcano base caused partial phase decorrelation.

Running the SNAPHU network flow unwrapper with an updated high resolution digital elevation model, they correct three unwrapping phase jumps across deep river ravines. To ensure the apparent inflation is not an artifact of heavy mountain clouds, they query GACOS atmospheric water vapor zenith delay maps, confirming that tropospheric delay accounts for less than five millimeters of the observed seventy millimeter signal. In the afternoon, the geodesist uses a Mogi source inversion model to estimate the depth and volumetric inflation rate of the underlying magma chamber, calculating a magma influx.

A Spaceborne Synthetic Aperture Radar SAR Interferometry InSAR Geodesist processes, models, and interprets radar phase interference patterns acquired by Earth observation satellite constellations like Sentinel 1, NISAR, and TerraSAR X to measure millimeter scale crustal deformation, volcanic magma inflation, urban infrastructure subsidence, and landslide movements. Operating across geological survey agencies, satellite remote sensing enterprises, and international hazard monitoring centers, the geodesist exploits the coherent phase of radar microwave pulses reflected from the Earth's surface across repeated orbital passes.

Core responsibilities include process and co register raw single look complex slc radar images from spaceborne c band, l band, and x band sar satellites., operational coordination, and ensuring strict adherence to Kenyan statutory frameworks and quality standards.

Key organizations hiring for this role include Kenya Space Agency KSA, Regional Centre for Mapping of Resources for Development RCMRD, Kenya Civil Aviation Authority KCAA, Safaricom Telecommunications Satellite Ground Stations, alongside expanding opportunities in Nairobi, Mombasa, Kisumu, and regional infrastructure projects.

Spaceborne Synthetic Geodesist Specialist, Senior Spaceborne Synthetic Geodesist, Spaceborne Synthetic Geodesist Lead, Spaceborne Synthetic Geodesist Consultant

While automated cloud processing pipelines and machine learning algorithms perform raw SAR focusing and baseline orbital calculations, extracting reliable geodetic signals requires experienced human geophysical interpretation. Distinguishing between genuine ground subsidence from groundwater overpumping and superficial phase decorrelation caused by agricultural plowing or vegetation growth demands deep field knowledge. The InSAR geodesist validates satellite phase time series against continuous GNSS ground station networks, calibrates corner retroreflector ground control points, and models subterranean fault dislocation geometries to advise government emergency civil protection agencies. Employment opportunities concentrate across major industrial, commercial, and financial hubs including Nairobi, Mombasa, Kisumu, Nakuru, and Eldoret, alongside specialized regional project sites.