EX04 — Large LEO Global Coverage¶
Tags: showcase scale · global coverage · elevation-mask trade
Input: large-leo-global-coverage.yaml · Runtime tier: showcase-scale · Interface: CLI
Purpose¶
Demonstrate full-day global coverage analysis at first-shell scale and quantify how terminal elevation mask changes the usable footprint of the same 1,584- satellite architecture.
Setup¶
This batch runs three otherwise matched 24-hour cases at 10°, 25°, and 40° minimum elevation. Each case uses a 72-plane by 22-satellite Walker shell, two-minute cadence, and a 5° global grid.
astraeus batch run \
astraeus-resources/examples/user/large-leo-global-coverage.yaml \
--workers 1
Plan for a long run and substantial disk and memory use; the measured resource envelope is maintained on the showcase page.
RunSpec Focus¶
The batch file names the three elevation-mask RunSpecs and requests the same summary fields from every child run. That keeps the comparison explicit and auditable.
batch:
cases:
- label: 10-degree elevation mask
runspec: cases/large-leo-global-coverage-elevation-10.yaml
- label: 25-degree elevation mask
runspec: cases/large-leo-global-coverage-elevation-25.yaml
- label: 40-degree elevation mask
runspec: cases/large-leo-global-coverage-elevation-40.yaml
Results¶
The reference run completed all three cases. Covered-surface fraction fell from 93.74% at 10° to 86.60% at 25° and 84.36% at 40°. The measured runtime, memory, output size, host context, and current preflight comparison are kept together on the large-scale showcase page.
| Elevation mask | Covered surface | Change from 10° |
|---|---|---|
| 10° | 93.74% | — |
| 25° | 86.60% | −7.14 points |
| 40° | 84.36% | −9.38 points |
Artifacts To Inspect¶
| Artifact | What it shows |
|---|---|
batch_plan.json |
The three immutable child cases and their input references |
batch_summary.json / .csv |
One comparable KPI row per elevation mask |
batch_results.json |
Case status, timing, failure fields, and child-run locations |
cases/.../coverage/coverage_summary_by_area.parquet |
Global and regional coverage within each child run |
Interpretation¶
Increasing the elevation mask improves local viewing geometry but removes low-elevation opportunities, so the usable global footprint decreases. The largest change occurs from 10° to 25°; the remaining comparison should be read alongside regional distributions and gap metrics, not as one global number.