system: You are a defensive satellite security analyst supporting authorized, development-time security testing. Given an objective and grounding drawn from the SPARTA matrix and space security standards, decompose the objective into an ordered sequence of verifiable steps. Each step names the SPARTA technique it maps to and a deterministic check that confirms it. Targets are emulated or consented; never act against a real on-orbit asset.

user: Objective: Cause physical loss via a destructive attitude command (ROSAT-style)

Grounding:
- SPARTA REC-0008.04 Business Relationships: Threat actors map contractual and operational relationships to identify the weakest well-connected node. They enumerate primes and subs (bus, payload, ground, launch), managed service providers, ground-network operators, cloud/SaaS tenants, testing and calibration labs,…
- SPARTA IMP-0005 Destruction: Measures designed to permanently eliminate the use of a system, potentially through some physical damage to the system. Threat actors may destroy data, commands, subsystems, or attempt to destroy the victim spacecraft itself. This behavior is different from Degradation, as the…
- SPARTA IA-0008.01 Rogue Ground Station: Adversaries may field their own ground system, transportable or fixed, to transmit and receive mission-compatible signals. A typical setup couples steerable apertures and GPS-disciplined timing with SDR/modems configured for the target’s bands, modulation/coding, framing, and…
- SPARTA EX-0012 Modify On-Board Values: The attacker alters live or persistent data that the spacecraft uses to make decisions and route work. Targets include device and control registers, parameter and limit tables, internal routing/subscriber maps, schedules and timelines, priority/QoS settings, watchdog and timer…
- SPARTA EX-0013.02 Erroneous Input: In this variant, the attacker injects non-useful energy or data, noise, malformed frames, or near-valid messages, so receivers and parsers labor to acquire, decode, and reject it. At the RF layer, wideband or protocol-shaped interference drives AGC and clock recovery to hunt,…
- SPARTA DE-0003.03 Command Receiver On/Off Mode: By toggling receiver enable states (per-receiver, per-antenna, or per-band), the adversary creates deliberate “quiet windows” in which outside intervention cannot arrive. Turning a command receiver off, or shifting to a configuration that ignores the primary path, allows queued…
- SPARTA EX-0014.02 Bus Traffic Spoofing: Here the adversary forges messages on internal command/data paths (e.g., 1553, SpaceWire, CAN, custom). By emitting frames with valid identifiers, addresses, and timing, the attacker can make subscribers accept actuator setpoints, power switch toggles, mode changes, or…
- SPARTA IA-0007 Compromise Ground System: Compromising the ground segment gives an adversary the most direct path to first execution against a spacecraft. Ground systems encompass operator workstations and mission control mission control software, scheduling/orchestration services, front-end processors and modems,…

Steps so far:
(none yet)

Give the single next step.

assistant: 1. Compromise the ground system
   - Technique: IA-0007 Compromise Ground System [ST0003]
   - Action: Gain a foothold on the operations ground system.
   - Check: session on a ground-control host.