Gaofen (GF) is a series of Chinese civilian remote sensing satellites for the state-sponsored China High-definition Earth Observation System (CHEOS) program.

GF 2 is an optical satellite with a high-resolution imaging payload. In panchromatic mode, it achieves a ground resolution of 80 cm with a swath of 48 km. In multispectral mode, it reaches a resolution of 3.2 m. The satellite is based on the CS-L3000A bus.

Heweliusz (also called BRITE-PL) is the second Polish scientific satellite as part of the Bright-star Target Explorer (BRITE) programme. Heweliusz is an optical astronomy spacecraft built by the Space Research Centre of the Polish Academy of Sciences and operated by Centrum Astronomiczne im. Mikołaja Kopernika PAN; BRITE-PL2 is one of two Polish contributions to the BRITE constellation along with the Lem satellite. It is named after Johannes Hevelius.