We have a very good idea of that. It's interesting. I talked about a series of constellations and those series of constellations providing different functionalities that meet national needs. The first one is the most expensive, because as well as paying for the spacecraft, you actually have to put the ground infrastructure in place: all these big dishes there in the north and in the south that have movable, pointing antennas; all the operation centres and the data sensors. The cost of that? The space piece is about $75 million; the ground piece is about $75 million. So for the first constellation that's $150 million.
From then on, if you have a similar-sized constellation, it would be about half the cost, and the long-term space plan includes a proposal to build that infrastructure.