Could barely get up — felt completely wrecked. Yesterday I got stressed; my stomach seized up and my heart was pounding like a hammer. I thought I’d get sick, but no. Couldn’t fall asleep at night. I was upset that the “Delta” tests were going badly. Today they gave wrong settings, didn’t indicate the command for shutting off the forced mode, and so on. One saving grace: relations within the crew are completely trusting; we live by the principle that nobody will look after us the way we look after each other. We work hard, training on manual modes. The star tracker and sextant still won’t sync; the main windows for instrument installations 14 and 19 have developed a brown coating between the glass panes from the sealing rubber under ultraviolet exposure. Unlike the others, these windows don’t have special UV-blocking coating.

Today I saw Cape Horn in South America — the mountain plateau approaching the ocean is impressive. There’s already snow here. I noticed that during station stabilization there are strong flashes from the orientation engines and masses of particles fly off, like from a bonfire. This could fog the high-sensitivity film in the “Piramig” astrophysical instrument. I reported this to the ground.

Near the terminator, in low sunlight, shimmering particles are clearly visible, flaking off the thermal insulation. I watched one of them near the solar panel. It behaves interestingly — motionless relative to the station along the flight path and slowly rising upward, as if in water. I felt exhausted all day.