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-Qualication 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 Aalto-1 team.

本文简要介绍了芬兰第一颗卫星 Aalto-1 的设计、集成、测试和发射。Aalto-1 是一个三单元的立方体卫星，在大约 500 公里的高度发射到太阳同步极地轨道，自 2017 年 6 月开始运行。它携带三个实验有效载荷：阿尔托光谱成像仪 (AaSI)、辐射监视器 (RADMON) 和静电等离子制动器 (EPB)。AaSI 是可见光和近红外 (NIR) 波段的高光谱成像仪，RADMON 是高能粒子探测器，EPB 是离轨技术演示有效载荷。该平台旨在容纳多个有效载荷，同时确保足够的数据、电力、无线电、机械和电气接口。平台和有效载荷子系统的设计策略包括内部开发和商业子系统。

本文简要描述了平台和有效载荷子系统的设计方法、它们的集成和测试活动以及航天器发射。该论文还描述了 Aalto-1 团队开发的地面部分和服务。