1. The garbage collectors and the salesman

Makoto Yukimura’s Planetes follows a crew that collects orbital debris. The work is unglamorous, dangerous, and essential; every bolt they miss could kill someone. That is the debris side of this entry. Robert Heinlein’s The Man Who Sold the Moon is about a man who treats lunar access as a private business and has to bargain with governments, competitors, and his own shareholders over who controls the technology. That is the export-control side. The desktop must avoid becoming debris, and it must avoid becoming an uncontrolled technology transfer.

Entry 286 covered spectrum and remote sensing. This entry covers the last two practical pieces of the regulation arc: debris mitigation and export control.

2. Debris mitigation as a design requirement

Orbital debris is already a real hazard. National regulators and international guidelines require spacecraft operators to limit what they leave behind. The desktop is not exempt.

Key mitigation measures include:

  • Limiting debris released during normal operations. No deliberate ejection of material. Pyrotechnic devices and propulsion systems must be designed to minimize fragments.
  • Preventing on-orbit breakups. Tanks must be vented, batteries must be discharged, and pressurized vessels must be depressurized at end of life. This is passivation.
  • Avoiding collisions. The desktop should track conjunctions and be able to manoeuvre if a credible collision risk appears.
  • Post-mission disposal. After operations end, the spacecraft must be removed from its operational orbit within a defined period, commonly 25 years.
  • Reliable tracking. The object must be trackable so that others know where it is.

These are not optional environmental gestures. They are conditions for licensing in most jurisdictions.

3. The twenty-five-year rule and its implications

The widely accepted guideline is that spacecraft in low Earth orbit should deorbit within 25 years of end of mission. For the desktop this means:

  • The natural orbit must decay fast enough, or the platform must carry enough propellant to lower its perigee.
  • A higher orbit would extend lifetime but also extend the disposal obligation.
  • A controlled deorbit is preferable to uncontrolled reentry if any fragments could survive.
  • Propellant and propulsion must be sized for both operational manoeuvres and disposal.

The 25-year number is a compromise, not a physical law. Some regulators and operators now aim for five years or less. The trend is toward stricter disposal timelines.

4. Passivation

Passivation means removing stored energy from the spacecraft at end of life. The goal is to prevent the object from exploding or venting fragments long after it is dead.

Typical passivation steps:

  • Deplete propellant tanks and disable pressurization.
  • Discharge batteries and open electrical circuits.
  • Release any stored mechanical energy in springs, flywheels, or booms.
  • Disable transmitters to prevent interference.

Passivation is the spacecraft’s last responsible act. It should be commanded reliably, with fallback timers in case communication is lost.

5. Export control: ITAR and EAR

Space technology is heavily controlled. In the United States, the International Traffic in Arms Regulations (ITAR) covers defense articles and services, including many space-related items. The Export Administration Regulations (EAR) cover dual-use items with commercial and military applications.

The desktop is likely to encounter both. Controlled items may include:

  • Propulsion systems and components.
  • Guidance, navigation, and control hardware and software.
  • Encryption and cryptography.
  • Thermal protection materials.
  • High-performance sensors and optics.
  • Manufacturing processes and design data.

Export control applies not only to physical shipment but also to:

  • Sharing technical data with foreign nationals, even within the same company.
  • Cloud storage and collaboration tools that cross borders.
  • Travel with laptops or drawings.
  • Public releases that disclose controlled technical details.

6. Why export control shapes the team and supply chain

A project that is subject to ITAR cannot casually hire engineers from any country. It cannot use offshore manufacturing. It cannot store design files on any cloud service. It cannot publish detailed performance data without review.

This shapes decisions that look like engineering but are really legal:

  • Where the engineering team is located.
  • Which suppliers are acceptable.
  • What can be discussed at conferences.
  • How customer data is handled.
  • Whether foreign investment is permitted.

Some operators deliberately design around ITAR-controlled components to preserve flexibility. That choice may cost performance but gain market access.

7. Debris and export control together

These two topics meet in disposal. If a disposal system uses controlled technology, its design and operation may be restricted. If the desktop is built with ITAR-free components, it may be easier to sell or operate internationally. If it carries a foreign payload, export control may govern what that payload can see or do.

Regulation is a network, not a checklist. Pull one thread and others move.

What this changes

  • Debris mitigation is a design and licensing requirement, not a post-launch afterthought.
  • Passivation and disposal must be engineered with the same care as the mission itself.
  • Export control limits who can build, supply, fund, and operate the desktop.
  • ITAR and EAR affect team composition, supplier selection, data handling, and customer relationships.
  • The next entry will close the regulation arc with a contemplation.