UoSAT-1, also known as UoSAT-OSCAR 9 (UO-9), was a British amateur radio satellite which orbited Earth. It was built at the University of Surrey and launched into low Earth orbit on 6 October 1981. It exceeded its anticipated two-year orbital lifespan by six years, having received signals on 13 October 1989, before re-entering the atmosphere.
Like its successor UoSAT-2 it carried a CCD camera and a Digitalker speech synthesiser, and transmitted telemetry data on a 145.826 MHz beacon at 1200 baud using asynchronous AFSK.
The Astrid package sold by British firm MM Microwave, consisting of a fixed frequency VHF receiver set and software for the BBC Micro, could display the telemetry frames from either UoSAT-1 or UoSAT-2. UoSAT-1's solar arrays were of an experimental design reused for UoSAT-2.
^ abcdCook, Mike (June 1986). "Way into the world of satellite telemetry: Mike Cook reviews the Astrid telemetry package". The Micro User. Stockport, UK: Database Publications. 4 (4): 100–1. ISSN0265-4040.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).