Understanding ASAT
Major ASAT Tests
| Year | Nation | Target | Debris Created | Status |
|---|---|---|---|---|
| 2007 | China | Fengyun-1C (865 km) | 3,500+ tracked | Most fragments still in orbit |
| 2008 | USA | USA-193 (250 km) | 174 tracked | All decayed within months (low altitude) |
| 2019 | India | Microsat-R (283 km) | 400 tracked | Most decayed; some boosted higher |
| 2021 | Russia | Kosmos-1408 (480 km) | 1,500+ tracked | Threatened ISS crew; decaying slowly |
Why ASATs Threaten Everyone
Unlike terrestrial weapons, the consequences of a kinetic ASAT test affect all spacefaring nations. Debris from the Fengyun-1C test in 2007 spread across a wide altitude band and will remain in orbit for centuries. Each fragment becomes a potential impactor that can trigger further collisions — feeding the Kessler syndrome chain reaction. Even nations that did not conduct the test must now manoeuvre their satellites to avoid the resulting debris field.
Non-Kinetic Alternatives
Modern ASAT development increasingly focuses on reversible, non-debris-generating methods: GPS spoofing and jamming to deny navigation; cyber intrusion into satellite control links; ground-based lasers that dazzle optical sensors; and electronic warfare that overwhelms communication frequencies. These methods are harder to attribute and do not create lasting debris, making them strategically attractive but also harder to deter.