Sr Scientist

STC•College Park, MD

3d•Onsite

About The Position

STC supports NOAA NESDIS’s Center for Satellite Applications and Research (STAR) by providing scientific, engineering, and programmatic expertise across satellite algorithm development, calibration/validation, data product generation, and technology transition. Our team helps NOAA accelerate the delivery of high-quality environmental data products from current and next-generation satellite systems to users worldwide. STC is seeking a highly analytical Remote Sensing Data Scientist to support the following support activities for Atmospheric Sciences & Technology Applications (ASTA 2.0) Team to: Drive the validation and operationalization of next-generation satellite atmospheric retrievals. This role centers on the GXS T/q Level-2 validation program, utilizing Global Navigation Satellite System Radio Occultation (GNSS-RO) measurements as a critical reference dataset. Lead the rigorous assessment of both physical and AI/ML inversion algorithms. By adhering to a strict, multi-year evaluation schedule and utilizing MTG-IRS as a pre-launch proxy, this scientist will ensure that all final algorithm selections meet the strict latency, accuracy, and format requirements for numerical weather prediction and operational deployment.

Requirements

Deep understanding of the physical principles of GNSS Radio Occultation and hyperspectral infrared sounders (e.g., CrIS, MTG-IRS).
Experience evaluating physical baseline retrieval methods (such as those utilizing SARTA or PCRTM) and AI/ML approaches (including U-NET or Transformers).
Proficiency in Python (NumPy, SciPy, xarray) and/or Fortran/C++ for processing large satellite datasets and building automated scoring scripts.
Extensive experience working with Level-2 retrieval datasets, common product formats, and applying standardized quality control (QC) definitions.
Strong ability to operate within a strict governance framework, utilizing frozen evaluation criteria, test cases, and version-controlled submissions.
The ability to develop and maintain science applications in cloud-based operating environments is required in support of the NOAA-NESDIS 5-year plan to migrate to a cloud-based production and development environment.

Nice To Haves

Experience operating data processing pipelines in cloud environments (AWS, Google Cloud, or Azure) to manage high-volume commercial and government satellite data.
Familiarity with NUCAPS, MIIDAPS-AI, and retrieving atmospheric profiles under all-sky conditions using AI models trained on FV3GFS or ERA-5 data.
Proven track record of evaluating code structure, dependencies, and calibration sensitivity to assess a scientific algorithm's readiness for long-term operational maintainability.

Responsibilities

Execute formal remote sensing algorithm (NUCAPS, MIIDAPS-AI) evaluation cycles, including Round 1 retrievals
Prepare baseline code, Algorithm Theoretical Basis Documents (ATBD), and evaluation reports.
Finalize and deliver the ultimate OCS-compliant operational package in 1-2 years.
Collect one year of NESDIS STAR Retrieval Algorithms (NUCAPS, MIIDAPS-AI) data, and RO data.
Check the quality of the RO data and quantify all retrievals using independent datasets.
Utilize RO and all available datasets to guide the selection of the best inversion algorithms for GXS by employing MTG/IRS as a proxy.
Calculate algorithm bias, RMSE, and vertical structure against independent reference data, including radiosondes, dropsondes, surface observations, and reanalysis models.
Analyze error variance, convergence/failure modes, and retrieval performance across variable conditions such as clouds, land/ocean boundaries, inversions, and aerosol/dust events.
Monitor the usable single-FOV retrieval fraction and spatial/temporal representativeness.
Benchmark competing retrieval candidates on wall-clock speed, memory/compute demand, data-flow latency, and near-real-time feasibility.
Ensure all variables, atmospheric levels, metadata, and formats fully support operational forecasters and numerical weather prediction (NWP) assimilation requirements.