satellitetoolbox-gravity
SatelliteToolboxGravityModels.jl for spherical harmonic gravity field computation. Use when loading gravity models (EGM96, EGM2008), computing gravitational acceleration or potential, or working with ICGEM gravity field files.
Profile →npx skills add majiayu000/claude-skill-registry --skill satellitetoolbox-gravity-hammerhead-space-agenticcodingrules --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# SatelliteToolboxGravityModels.jl Spherical harmonic gravity field modeling. Repo: [JuliaSpace/SatelliteToolboxGravityModels.jl](https://github.com/JuliaSpace/SatelliteToolboxGravityModels.jl) ## Loading a Model ```julia using SatelliteToolboxGravityModels # Load from ICGEM file (downloads and caches automatically) model = GravityModels.load(IcgemFile, fetch_icgem_file(:EGM96)) model = GravityModels.load(IcgemFile, fetch_icgem_file(:EGM2008)) ``` ## Computing Accelerations All positions must be in **ITRF (body-fixed frame)** in **meters**. ```julia # Gravitational acceleration (mass-attraction only) -> SVector{3} [m/s²] a = GravityModels.gravitational_acceleration(model, r_itrf; max_degree=70, max_order=70) # Gravity acceleration (includes centrifugal) -> SVector{3} [m/s²] g = GravityModels.gravity_acceleration(model, r_itrf; max_degree=70) # Gravitational potential -> scalar [J/kg] U = GravityModels.gravitational_potential(model, r_itrf; max_degree=70) # Field derivative in spherical coords -> (dU/dr, dU/dϕ, dU/dλ) fd = GravityModels.gravitational_field_derivative(model, r_itrf; max_degree=70) ``` ## Pre-allocated Legendre Buffers (for hot-path performance) ```julia P = LowerTria
- Loading a Model
- Computing Accelerations
- Pre-allocated Legendre Buffers (for hot-path performance)
- Model Queries
- Key Conventions
What does the satellitetoolbox-gravity skill do?
SatelliteToolboxGravityModels.jl for spherical harmonic gravity field computation. Use when loading gravity models (EGM96, EGM2008), computing gravitational acceleration or potential, or working with ICGEM gravity field files.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill satellitetoolbox-gravity-hammerhead-space-agenticcodingrules --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.