ESTCube-1

[5] The CubeSat standard for nanosatellites was followed during the engineering of ESTCube-1, resulting in a 10×10×11.35 cm cube, with a volume of 1 liter and a mass of 1.048 kg.

[6][7] The mission ended officially on 17 February, 2015, and it was said that during this time it resulted in 29 bachelor's and 19 master's dissertations, 5 doctoral theses and 4 start-ups.

The satellite carried an electric solar wind sail (E-sail), which was invented by Finnish scientist, Pekka Janhunen.

[12] To control the E-sail element's interaction with both the plasma surrounding the Earth and the effect it had on the spacecraft's spinning speed, two nanotechnology electron emitters/guns were on board.

The positive ions in the plasma were intended to push the E-sail element and influence the satellite's rotation speed.

The satellite was placed into orbit and communication successfully established,[13] with the first photo of the Earth taken on May 15, and transmitted to the ground on the amateur radio band.

[5] The plan, beginning with the 7 May 2013 launch, included the following steps: The mission ended due to degradation of the photovoltaic power system[1] and subsequently the batteries became exhausted.

The last official transmission was transmitted on 17 February, 2015, however, imaging the Earth and gathering environmental data continued till May 19, 2015.

The first image of Earth taken by ESTCube-1 on May 15, 2013 [ 5 ]
ESTCube-1 E-sail experiment
The structure illustration of cubesat ESTCube-1
ESTCube-1 structure
A grid of satellite photos of Earth, four wide by three high, on a black background. Arctic Australia Brazil Bangladesh Myanmar Bay of Bengal Algeria Peru Mauritania The Gambia Dakar Senegal Guinea-Bissau Guinea Atlantic Ocean Red Sea Sudan English Channel Antarctica China–Mongolia border
Photos taken by ESTCube-1 (in chronological order). Point at or click on each photo to see where it is.
ESTCube-1 presentation in January 2013