Undertook a campaign to measure the wideband impulse response of the outdoor-to-indoor channel for the UK Space Agency.  The work was undertaken in the context of global positioning system design. A sliding correlator channel sounder was designed and constructed, operating at a chip rate of 100 MHz and a carrier frequency of 2.4 GHz.  Measurements were made with the transmitter supported by a balloon, and the receiver indoors, and were carried out at the offices in Cobham, and a suburban house in Guildford.