canvod-grids 0.2.3

Equal-area hemispheric grid operations for GNSS-Transmissometry

canvod-grids

Equal-area hemisphere grid operations for GNSS-Transmissometry.

Part of the canVODpy ecosystem.

Overview

canvod-grids provides the spatial discretization layer for GNSS-T. Satellite signal paths are assigned to equal-area grid cells on the hemisphere above the receiver based on their polar angle (θ) and azimuth (φ). The primary grid type for GNSS-T is the equal-area grid, where each 2° band is divided into cells of equal solid angle.

Seven grid types are available: equal_area, equal_angle, equirectangular, htm, geodesic, healpix, and fibonacci.

Installation

uv pip install canvod-grids

Quick Start

from canvod.grids import create_hemigrid, GridType

# Create a 2° equal-area hemisphere grid
grid = create_hemigrid(grid_type=GridType.EQUAL_AREA, resolution=2.0)
print(grid.ncells)  # number of grid cells

# Assign satellite observations to cells
from canvod.grids import CellAggregator
agg = CellAggregator(grid)
per_cell = agg.aggregate(ds, variable="vod", method="median")

Documentation

Full documentation

Development

See the main repository for workspace development setup.

License

Apache License 2.0

Author & Affiliation

Nicolas François Bader Climate and Environmental Remote Sensing Research Unit (CLIMERS) Department of Geodesy and Geoinformation TU Wien (Vienna University of Technology) Email: [e-mail] https://www.tuwien.at/en/mg/geo/climers