Astronomer Calibrates Telescope in Siguiri Rain

Deep indigo twilight blankets the tidal survey transect in Siguiri as rain-slicked earth reflects the fading sky. A researcher in a dark raincoat stands centered between two parallel metal rails, their hands adjusting the focus ring of a large telescope mounted on a tripod. Humid air rests on the instrument's silver casing, causing faint condensation to bead along the barrel. The ground is a mix of wet mud and scattered stones, glistening under the residual blue light. Behind the observer, a small portable shelter with a corrugated roof stands slightly askew, its fabric flapping gently in the damp breeze. The telescope's shadow stretches long and sharp across the muddy ground, ending abruptly at a puddle that mirrors the dark silhouette of the lens hood. A red LED indicator on the control box glows steadily against the encroaching night.