This is the first serious attempt at low frequency radio astronomy outside of the ionosphere so we really don't know what we might hear. Karl Jansky at Bell Labs started it all off in 1931 whilst investigating sources of radio interference or static. He eventually categorized them into three types of static: nearby thunderstorms, distant thunderstorms, and a faint steady hiss of unknown origin. He spent over a year investigating the source of the third type of static and determined that the signal repeated on a cycle of 23 hours and 56 minutes, a sidereal day.
By comparing his observations with optical astronomical maps, Jansky concluded that the radiation was coming from the Milky Way and was strongest in the direction of the center of the galaxy. He published "Electrical disturbances apparently of extraterrestrial origin" in 1933, the astronomers didn't show much interest and Bell Labs wouldn't let him build a larger antenna, so that was it. He does however have a unit of spectral flux density named after him, 1Jy = 10
-26W/(m
2.Hz). So that's how radio astronomy got started, so when any science gets published the results will probably be in Janskys, they usually are.
Radboud University Radio Lab and ASTRON might be two useful sources when anything is published.
https://www.ru.nl/astrophysics/research/radboud-radio-lab-0/https://www.astron.nl/r-d-laboratory/ncle/netherlands-china-low-frequency-explorer-ncleBTW. Jansky's radio observations were done at 20.5MHz, so that's why went rabbiting on about Karl Jansky.
EDIT: According to the Earth Observation Portal website
"Two Chinese microsatellites, DSLWP -A and -B (Discovering the Sky at Longest Wavelengths Pathfinder), also referred to as Longjiang-1 and Longjiang-2, were launched with the Chang’e 4 relay mission to conduct astronomical observations from deep space (Selenocentric, elliptical orbit). The two microsatellites were developed by the Harbin Institute of Technology. Each microsatellite has a mass of 47 kg"
Longjiang-1 failed but Longjiang-2 reached orbit.
Also, according to the mission status on the eoportal website, "the three 5-meter antennas of the low-frequency radio spectrometer on the lander have fully spread out". Dated 5th January
https://directory.eoportal.org/web/eoportal/satellite-missions/c-missions/chang-e-4