Summary of Key Points
At the Science and Technology Innovation Conference held in Shanghai on July 28th, a roundtable on commercial aerospace focused on three main topics: the "revolution in launch costs," the empowerment of ground-based services by space infrastructure, and the integration of computing capabilities from air, space, land, and sea. The participants agreed that commercial aerospace is shifting from a model where profits come primarily from launches to one where revenue is generated through applications. Space-based computing (bringing computers into space) represents a new growth area for the space economy. However, achieving a sustainable business model requires overcoming various challenges in areas such as costs, technology, and standards. The discussion covered topics including how to reduce the cost of reusable rockets, standardizing satellite manufacturing processes, the potential use cases and strategic value of space-based computing, as well as the technical difficulties involved throughout the entire industry chain.
Detailed Analysis
1. Revolution in Launch Costs: Reusable Rockets Make Space Access More Affordable
In the past, rockets were designed to be expendable after a single launch, resulting in exorbitant costs that made them unaffordable for most people (for example, a single launch could cost hundreds of millions). With the advancement of reusable rocket technology, such as SpaceX's "Long March 2Y" rocket, which can be recovered and reused, the cost of space travel has significantly decreased. The goal is to make space access more affordable so that large-scale satellite constellations can be deployed. Xie Hongjun, the head of Starry Sky Computing, stated that their aim is to greatly reduce the cost of traveling to and from space, making it feasible to "bring computing power into the heavens."
2. Space-Based Computing: What Practical Problems Can Space-Based Computing Solve?
Many people wonder why we need to move computing power into space when terrestrial facilities are already powerful enough. The participants provided three main reasons:
- Emergency Response: For instance, in cases of mudslides or forest fires, radar satellites combined with space-based computing can monitor terrain changes in real time and issue warnings before any damage is done.
- Covering Unserved Areas: Satellites can provide coverage in deserts, remote seas, and uninhabited regions where terrestrial infrastructure is lacking. They can also serve as a backup in the event of earthquakes or network outages.
- Energy Efficiency: Terrestrial data centers consume large amounts of energy (for example, due to limited renewable power sources in Shanghai), while space offers virtually unlimited solar energy that can be efficiently harnessed for computing purposes.
There are also strategic considerations: Space orbits and frequency bands are limited resources. SpaceX already has thousands of satellites in orbit, while China currently has only a few hundred. It is essential for countries to act quickly to secure their share of these resources.
3. Satellite Manufacturing:降低成本 by Emulating the Automotive Industry
Traditional satellites are very expensive—tonnage-level satellites can cost hundreds of millions of yuan. To build a large constellation of tens of thousands of satellites, we need to adopt manufacturing methods similar to those used in the automotive industry:
- Standardized Design: Satellites should be modular, with components such as power sources, structures, and communications systems designed according to uniform standards for mass production.
- Supply Chain Transformation: The aerospace industry can adopt industrial or even renewable energy-based supply chains (similar to those used in the automotive sector) to reduce costs.
Even with these improvements, satellite costs are still quite high (Xie Hongjun mentioned that "million-level costs are still considered expensive," indicating further potential for reduction). He emphasized that without effective cost control, the aerospace industry will not be able to gain a foothold in the market.
4. Technical Challenges: Overcoming Barriers to the Adoption of Space-Based Computing
While space-based computing holds great promise, there are many technical hurdles to overcome:
- Energy Supply: Satellites consume a lot of power, and while solar energy is an abundant option in space, current solar panels (based on gallium arsenide) are expensive. More cost-effective alternatives (such as silicon-based or perovskite panels) need to be developed while addressing radiation and temperature stability issues.
- Heat Dissipation: Chips generate heat in space, and without air convection, liquid cooling systems are required to dissipate this heat effectively. The efficiency of these systems still needs to be verified in orbit.
- Radiation Resistance: Ordinary chips are damaged by cosmic radiation; specialized, radiation-resistant chips need to be developed from the design stage through production.
- Network Management: Managing the coordination and data transmission among thousands of satellites is much more complex than with traditional internet satellites.
- Power Stability: Computing loads can experience sudden high-power spikes, requiring power systems that can adapt quickly to maintain stable output.
5. Strategic Perspectives: The Competition for Space-Based Computing and Shanghai's Advantages
Li Ye from the Shanghai Industrial Technology Innovation Promotion Association pointed out that space-based computing is a critical national asset. It helps countries secure orbital resources (which are scarce) and plays a key role in their participation in the global space economy. Shanghai, with its aerospace institutions and advanced satellite manufacturing capabilities, is an ideal platform for China's commercial aerospace industry to gain international recognition.
In summary, space-based computing does not aim to replace terrestrial computing but to complement it, addressing practical needs while providing a competitive advantage in the space sector. However, its widespread adoption requires overcoming significant technical and cost challenges.
Does this detailed analysis make the complex concepts of commercial aerospace and space-based computing more understandable? All the terms used are explained in plain language that is easy for non-experts to grasp.