  The design, integration, testing, and launch of the first Finnish satellite
Aalto-1 is briefly presented in this paper. Aalto-1, a three-unit CubeSat,
launched into Sun-synchronous polar orbit at an altitude of approximately 500
km, is operational since June 2017. It carries three experimental payloads:
Aalto Spectral Imager (AaSI), Radiation Monitor (RADMON), and Electrostatic
Plasma Brake (EPB). AaSI is a hyperspectral imager in visible and near-infrared
(NIR) wavelength bands, RADMON is an energetic particle detector and EPB is a
de-orbiting technology demonstration payload. The platform was designed to
accommodate multiple payloads while ensuring sufficient data, power, radio,
mechanical and electrical interfaces. The design strategy of platform and
payload subsystems consists of in-house development and commercial subsystems.
The CubeSat Assembly, Integration & Test (AIT) followed Flatsat --
Engineering-Qualification Model (EQM) -- Flight Model (FM) model philosophy for
qualification and acceptance.
  The paper briefly describes the design approach of platform and payload
subsystems, their integration and test campaigns, and spacecraft launch. The
paper also describes the ground segment & services that were developed by the
Aalto-1 team.
