IN-SPACe Re-entry Guidelines

Why in News?

Recently, the Indian National Space Promotion and Authorisation Centre (IN-SPACe) released the 'Authorisation for Undertaking Planned Re-entry of Space Objects' guidelines.

What is the background?

• Issue of debris – Objects in orbit or the upper atmosphere, such as spent rocket stages, dead satellites, and orbital debris, naturally fall back to Earth due to gravity.
• Most of these re-entries are uncontrolled, with smaller objects burning up in the atmosphere, while larger or heat-resistant components may survive and reach the Earth's surface.
• Need for the guidelines – Rapid growth of India's commercial space ecosystem.
• Increasing number of satellite launches.
• Rising risks from uncontrolled space debris.
• Need to safeguard public safety, aviation and maritime operations.
• India's obligations under international space law.
• Hence the guidelines specifically deal with planned re-entry.

What is Planned Re-entry?

• Planned Re-entry – It refers to the controlled return of a space object into Earth's atmosphere by managing its landing location, trajectory, or timing using suitable technical measures.
• The guidelines distinguish it from:
• Unplanned Re-entry – Natural orbital decay without active control.
• Post-Mission Disposal (PMD) – End-of-life disposal measures to minimize space debris and ensure long-term sustainability of outer space.

What are the major features of the guidelines?

• Mandatory IN-SPACe Authorisation – Every planned re-entry undertaken by an Indian entity, whether inside or outside Indian territory, requires prior authorisation from IN-SPACe.
• Foreign operators can undertake re-entry over Indian territory only through an incorporated Indian entity responsible for regulatory compliance.
• Exception for Natural Burn-up – Separate re-entry authorisation is not required when:
  • The spacecraft naturally decays from orbit.
  • It completely burns up during atmospheric entry.
  • The post-mission disposal plan already addresses debris mitigation.
• Such plans, however, must be disclosed in the Space Debris Mitigation Plan during authorisation.
• Advance Planning – Applicants must, declare re-entry plans during satellite authorisation itself, submit detailed technical information, provide survivability studies, submit casualty risk assessments, furnish trajectory analysis.
• Separate approval is revalidated approximately three months before the planned re-entry.
• Where re-entry is planned after launch, applications must be submitted at least six months in advance.
• Public Safety Threshold – The guidelines prescribe a strict quantitative safety benchmark.
• The Expected Casualty (Ec) due to re-entry must remain below 1 in 10,000
• Applicants must demonstrate compliance through scientific risk assessments.
• Comprehensive Risk Assessment – Applicants are required to submit mission objectives, re-entry trajectory, event timeline, failure scenarios, fragmentation pattern, ballistic coefficients, reliability analysis, de-orbit strategy, impact zones and danger zones.
• IN-SPACe may require changes in mission planning if safety standards are not satisfied.

• NOTAM and Danger Zone Notification – Before every re-entry mission, Applicants must obtain an Advisory Note from IN-SPACe.
• Relevant aviation and maritime authorities must issue NOTAM/NAVAREA warnings.
• Notifications should generally begin around 45 days before the scheduled re-entry.
• Revised notifications are mandatory if schedules or danger zones change.
• Liability and Insurance – Applicants must bear full responsibility for third-party damages.
• Protect the Government of India from liabilities arising under the Liability Convention (1972).
• Obtain adequate insurance, including mandatory third-party liability insurance where prescribed.
• Authorisation is contingent upon satisfying insurance and notification requirements.
• International Coordination – Where the planned re-entry affects another country's territory or Exclusive Economic Zone (EEZ), applicants must secure prior clearance from the concerned nation before authorisation.

What is the significance of the guidelines?

• Strengthens India's Space Governance – Establishes a predictable regulatory framework, Enhances investor confidence and Supports private-sector participation.
• Improves Public Safety – Minimises risks to life and property.
• Protects aviation and maritime navigation and Enables scientifically managed re-entry operations.
• Promotes Sustainable Space Activities – Encourages responsible end-of-life disposal.
• Supports mitigation of space debris and Contributes to long-term sustainability of outer space.
• Enhances International Credibility – Aligns domestic practices with international obligations.
• Demonstrates India's commitment to responsible space operations.
• Supports Commercial Space Ecosystem – Provides procedural certainty for startups and private operators.
• Facilitates growth under the Indian Space Policy and regulatory reforms.

What lies ahead?

• The IN-SPACe 'Authorisation for Undertaking Planned Re-entry of Space Objects' guidelines establish a comprehensive framework governing the planned re-entry of space objects.
• The guidelines strengthen India's regulatory framework for space activities while supporting emerging capabilities such as Gaganyaan, reusable launch vehicles, and commercial space missions.

Reference

The Hindu| IN-Space Re-Entry Guidelines