Spacebackend 2026: This Half's Shipped Work
H1 2026 changes: 3 ICD formats, rebuilt parser tables, an ECSS-E-ST-70-41C hint pass, and 2 weeks of rework.
Engineering Notes
Technical notes on spacecraft V&V
Spacebackend team: ICD parsing, CCSDS packet validation, OBSW testing, and flight software engineering.
All articles
Reducing Integration Test Cycles: Weeks to Days
The 6-week integration prep bottleneck is manual ICD field translation; ICD-to-test-stub generation automates it.
Ground Segment V&V Tooling Gap
V&V covers OBSW first, while ground software waits for a late CDR pass, creating a material schedule risk.
Commercial NewSpace Awareness of DO-178
DO-178C has no commercial-space regulatory route, but its traceability and coverage concepts are entering NewSpace work, with an overhead warning.
Test Harness or Flight Hardware: When Simulation Suffices
When a software harness suffices, and when hardware is required for bus timing, signal quality, or interrupt latency.
Five ICD Patterns That Disrupt Automated Code Generation
Spot five ICD patterns, including merged cells and parent-relative bit offsets, before they break parsing and code generation.
Budget Flight Software Testing
A 2-person team with 100-200 V&V hours can prioritize ICD interfaces: 25 packet types x 15 fields yield 375 requirements, with tests regenerated after changes.
TM/TC Frame Decoding: The Undocumented Part
CCSDS TM decoding covers 6-octet headers, VCID, counts, status words, and FHP 0x7FF/0x7FE, including valid idle frames.
LLM Parsing of Spacecraft Interface Control Documents
Spacebackend's ICD pipeline extracts structure, maps semantics, resolves cross-references, handles ambiguity, and validates against CCSDS patterns with LLMs.
Automating OBSW Regression Tests Without Full MIL Environment
For OBSW, regression tests can separate software-only behavioral fidelity from hardware conformance, avoiding a full MIL environment.
CCSDS Packet Checks for Lean Engineering Teams
CCSDS packet validation covers mission-safety checks, commonly missed checks, and automation, including 14-bit per-APID sequence counts that wrap at 16383.
Small Satellite V&V Shortfall
A 3U CubeSat case shows how deferred tests and reduced configs left 11 of 23 TC types untested against the flight-configured binary one month before launch integration.
ICD to Test Suite: Replacing the Manual Process
Spacebackend's 1-week baseline for a 340-page OBSW ICD v2.3 covers manual APID orientation, field/type mapping, and the resulting parser and unit-test suite.