 Aleksandrov also continued work on experiments scheduled for Georgi Ivanov's flight (such as "Kontrast-2" and "Ilyuminator-2") and examined the properties of Bulgarian-made space food.The original flight date was scheduled for 21 June 1988, but by April 1988, it was advanced to 7 June.This was caused by changes in the station's orbit by the engines of the Progress 36 resupply spacecraft.