Chinese direct-ascent ASAT test against Fengyun-1C (2007)
What happened
On 11 January 2007 China destroyed its own defunct weather satellite Fengyun-1C with a direct-ascent kinetic kill vehicle. The target was in a sun-synchronous orbit at approximately 850 km altitude and 98.8 degrees inclination, and the interceptor struck head-on at a closing velocity of roughly 8 km per second. The fragmentation was the most severe in the history of spaceflight. NASA's Orbital Debris Program Office reported 1,613 fragments identified and tracked by 31 March 2007, a figure that continued to grow, and later estimated of order 35,000 fragments larger than 1 cm, the large majority of them below the size the US Space Surveillance Network can track. The event is recorded here for its command, tracking and cataloguing consequences: a step change in the number of objects every conjunction assessment and collision-avoidance decision in low Earth orbit must be computed against, and a permanent gap between the trackable population and the actual hazard.
Kinetic, and recorded for what it did to shared information systems rather than for the physics. Four consequences carry the record. Space-domain awareness is a dependency every operator shares, and the test raised the permanent load on its sensors, its association software and its operators in a single act. The untracked population is the security problem: with roughly 35,000 fragments above 1 cm and only a few thousand trackable, the catalogue is known to be incomplete, which weakens every automated decision that trusts it. Attribution is trivially available for a direct-ascent intercept because the launch is detected, which makes this the attributable end of the counterspace spectrum and a useful contrast with the electronic and cyber events elsewhere in this corpus. And the debris cloud is the empirical basis for SPARTA's DE-0009.01 concealment technique rather than an instance of it, which is why that technique is rejected here rather than mapped. DE-0009.05 is the closest call and is likewise rejected, on the ground that no source attributes intent to degrade space-domain awareness; a reviewer may reasonably overturn that.
Attack vector
Direct-ascent kinetic kill vehicle launched from Earth, intercepting the target head-on at approximately 8 km per second.
Operational impact
Permanent loss of Fengyun-1C. Persistent degradation of the low-Earth-orbit environment: thousands of catalogued fragments added in one event, and an estimated 35,000 fragments above 1 cm of which only a few thousand are trackable.
Affected segments
space
SPARTA techniques evidenced
Each row is a technique this record evidences, with the reasoning and the source that attests to it.
What relationship, confidence, and evidence mean on the rows below
- Relationship
What kind of link this is between the technique and the target.
Mitigates: the target actively prevents, detects, or recovers from the technique.
Addresses: the target governs the technique or is relevant to it, without interdicting it. Most governance and policy obligations sit here.
Triggers obligation: the technique occurring is what triggers the duty the target imposes.
Relates to: related to the technique, but the target neither interdicts nor governs it. Used sparingly.
- Confidence
How strongly the source supports this mapping, not how severe the technique is.
High: the source supports the mapping squarely.
Moderate: supported, with a qualification such as a cross-tactic reading that stays operationally sound.
Low: the source reaches the technique only in part.
- Evidence
How close to the source text the mapping was made.
Direct: a verbatim excerpt of the cited source was read against the technique, and the rationale argues from that excerpt.
Derived: the mapping follows from the source's scope or structure, with no on-point excerpt addressing the technique.
Inferred: reached by composition through another framework, or by domain reasoning the source does not support on its face.
EX-0017.01 is defined as a medium- or long-range missile launched from Earth to damage or destroy a satellite in orbit, and adds that such attacks are easily attributed because the launch is detected. Both the act and the attribution property are established by the sources.
The spacecraft was permanently eliminated by physical damage, which is IMP-0005's definition. The technique text distinguishes destruction from degradation on the ground that the parts are destroyed rather than left to degrade, and Fengyun-1C was fragmented into thousands of pieces. The evidence type is derived rather than direct: the argument runs from the technique text to the reported facts of the record, and no verbatim excerpt of the cited bulletin was read against this technique.
RD-0005.03 covers possession and use of kinetic capability, naming direct-ascent systems launched from Earth to intercept a satellite on orbit, and states that such actions often produce persistent hazardous debris. Both halves are established here: the capability was demonstrated and the resulting debris is the most persistent on record.
Considered and not mapped
These techniques were considered for this record because a source, a related record or SPARTA's own catalogue pointed at them. Each was read against what the sources say and not mapped. The reason is given in full.
The technique describes an adversary co-orbiting within a debris cluster to conceal a vehicle. The test created the cluster. Mapping it would assert that concealment was the purpose, which no source says. The test is the enabling condition for the technique, and the narrative records that.
This is the closest call in the record. The measured effect, thousands of new catalogue objects, a permanently raised tracking and conjunction-assessment load, is genuinely the effect DE-0009.05 describes, and its text includes saturating ingestion. But the technique requires the adversary to be targeting the SDA pipeline to blind or confuse it, and no source attributes that intent. Recorded as a rejection with the reasoning, so a reviewer can overturn it deliberately rather than by omission.
The attack was kinetic. Listed because SPARTA's bibliography associates EX-0018 and EX-0018.01 with anti-satellite material generally.
Cited in SPARTA's bibliography against the Secure World Foundation fact sheet on this test. The technique is about an adversary spacecraft used to gain access to a target. A direct-ascent interceptor is not a spacecraft in that sense and no on-orbit vehicle was involved.
IMP-0005 is mapped; the technique text distinguishes destruction from gradual degradation and this is the former.
Also cited there. The technique is about acquiring launch infrastructure as adversary infrastructure. That China possesses launch facilities is not in question and is not what the sources describe as the act.
Sources
The published accounts this record rests on. The tier is SafeMode Space's own assessment of the source, and the reason for it is given beside it. What the tiers mean and how they are assigned: the source tiers.
A source is listed when a mapped technique rests on it, or when it disputes the account. One the curators read but neither cited nor recorded as disputing the record is not listed, so an absence here means neither is true rather than that nobody looked.
- Chinese Anti-satellite Test Creates Most Severe Orbital Debris Cloud in History, Orbital Debris Quarterly News 11(2)Government report
Tier 1: The assessment of the US government office responsible for the orbital debris environment, published in its own technical newsletter. Authoritative on the fragmentation and on the tracked-object counts.
- Analysis of the 2007 Chinese ASAT Test and the Impact of its Debris on the Space EnvironmentConference papersupporting
Tier 1: Conference paper by the analyst who maintains CelesTrak, presented at the Advanced Maui Optical and Space Surveillance Technologies conference, on the tracking and cataloguing consequences of the test.
Every source SafeMode Space reproduces, and on what terms: sources and attribution.