Yareelo project

Nowadays continuous monitoring solar activity and space weather prediction are important and unique problems of space research of the Sun. Installation of specific equipment onboard of CubeSat nanosatellites instead of large geostationary spacecraft for meteorological research will significantly reduce the cost and wait time for launch and solution of such scientific problems.

For non-stop observations of the Sun at least two satellites are required. One of them should always be on the illuminated part of the orbit. Piggyback launch of both satellites is now about the only way to get the working orbit, so, a special device is required to deploy the constellation.

We propose an alternative concept based on the use of the two-blade rotor solar sail technology for the nanosatellite constellation formation[1]. Due to this technology, it becomes possible to reconstruct the constellation after the certain work time as well as deorbit waste satellites into the lower layers of the atmosphere.

The payload onboard the designed nanosatellites is the X-ray photometer for registration of emission of the whole Sun in the range 0.5-15 keV developed in P.N. Lebedev Physical Institute of Russian Academy of Science. This highly sensitive instrument allows the observation of solar activity associated with the processes of flaring energy release, which has a significant impact on an interplanetary environment and space weather.

The design of the developed spacecraft and the concept of constellation formation are shown in Fig. 1,2.

Figure 1 – The layout of the spacecraft (fully meets the requirements of 1,5U format of CubeSat Design Specification Rev.13)

Figure 2 – The concept of creation a nanosatellite constellation by means of solar sail
(1- two CubeSats after the launch; 2- rotation of the nanosatellites by magnetic coils 3-  deploying the sail from the first nanosatellite; 4 – reducing the orbit and closing the sail of the first CubeSat and deploying the sail from the second CubeSat ; 5 – closing the sail of the second CubeSat and start of the research